Journal articles on the topic 'Fibre processing'
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1
Baltiņa, Ilze, Zaiga Zamuška, Veneranda Stramkale, and Guntis Strazds. "HEMP GROWTH AND FIBRE PROCESSING POSSIBILITIES IN LATVIA." Latgale National Economy Research 1, no. 4 (June 23, 2012): 42. http://dx.doi.org/10.17770/lner2012vol1.4.1822.
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Use of hemp fibre is rapidly increasing in Europe. This tendency is related to carbon and glass fibre substitution with recycled and biodegradable raw materials for use in car production. Scientists and manufacturers work to obtain new composite materials where hemp fibre will be as reinforcement. Hemp fibres are light and with high tensile strength comparing with other technical fibres. Advantage – eco–friendly utilization possibilities. The research work to determine hemp fibre efficiency was carried out for two years at the Latgale Agricultural Research Centre. In this work different hemp fibre varieties were used. To determine the most suitable varieties for Latvian climatic conditions all the varieties were tested at the laboratories of Riga Technical University, Institute of Textile Material Technologies and Design. We are looking for new possibilities to make technical textile samples from different hemp fibre varieties. In cooperation with Laboratories of the Scientific Institute of Food Safety, Animal Health and Environment “BIOR” the amount of tetrahydrocannabinol (THC) in different variety cannabis plants were determined. It was concluded that amount of THC of different open–air cultivation varieties grown in Latvia is different but anyway this amount is much below the acceptable norm.
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Vasumathi, M., and Murali Vela. "Mechanical Behaviour of Chemically Treated Reshira-Epoxy Composite at Cryogenic Temperatures." Advanced Materials Research 488-489 (March 2012): 718–23. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.718.
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Natural fiber composite has already proved its worth in various mechanical applications. Natural fibres with attractive properties such as low density, environment-friendliness and less processing work are widely available and provide an alternative to the conventional fibres. In this paper, the fibre reshira has been tried for the first time for cryogenic applications. Initially, the fibre is given chemical treatment with sodium hydroxide solution to enhance the adhesion between the fibre and the resin. The treated fibre is reinforced with epoxy resin and its properties such as storage modulus, loss modulus and Glass Transition Temperature are evaluated both at room temperature and under cryogenic conditions and these are compared to see which condition produces better mechanical performance.
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Zimniewska, Malgorzata. "Hemp Fibre Properties and Processing Target Textile: A Review." Materials 15, no. 5 (March 3, 2022): 1901. http://dx.doi.org/10.3390/ma15051901.
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Over the last several decades, Cannabis sativa L. has become one of the most fashionable plants. To use the hemp potential for the development of a sustainable textile bio-product sector, it is necessary to learn about the effect of the processes creating hemp’s value chain on fibre properties. This review presents a multi-perspective approach to industrial hemp as a resource delivering textile fibres. This article extensively explores the current development of hemp fibre processes including methods of fibre extraction and processing and comprehensive fibre characteristics to indicate the challenges and opportunities regarding Cannabis sativa L. Presented statistics prove the increasing interest worldwide in hemp raw material and hemp-based bio-products. This article discusses the most relevant findings in terms of the effect of the retting processes on the composition of chemical fibres resulting in specific fibre properties. Methods of fibre extraction include dew retting, water retting, osmotic degumming, enzymatic retting, steam explosion and mechanical decortication to decompose pectin, lignin and hemicellulose to remove them from the stem with varying efficiency. This determines further processes and proves the diversity of ways to produce yarn by employing different spinning systems such as linen spinning, cotton and wool spinning technology with or without the use of the decortication process. The aim of this study is to provide knowledge for better understanding of the textile aspects of hemp fibres and their relationship to applied technological processes.
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Thumm, Armin, Damien Even, Pierre-Yves Gini, and Mathias Sorieul. "Processing and Properties of MDF Fibre-Reinforced Biopolyesters with Chain Extender Additives." International Journal of Polymer Science 2018 (December 16, 2018): 1–9. http://dx.doi.org/10.1155/2018/9601753.
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Biopolyesters are a way to improve natural fibre composite sustainability. This study explores, for the first time, the potential of using medium density fibreboard (MDF) fibres to reinforce four biobased and biodegradable polyester matrices to create a fully “green composite.” Added at 30 wt %, MDF fibres did not improve the strength of the injection moulded NFCs and this deficiency was investigated by measuring fibre length, viscosity, and molecular weight of the matrices. Compared to other lignocellulosic fibres, the use of MDF fibres led to a molecular weight reduction of biopolyesters during processing. This effect was particularly striking for PLA. The addition of a chain extender enhanced the molecular weight of PLA and improved its processability. The tensile strength increase was correlated to a reduction of fibre pull-out, enabling the MDF fibre to fulfil its expected reinforcement role within the biopolyester composite.
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McGregor, B. A. "Production, properties and processing of American bison (Bison bison) wool grown in southern Australia." Animal Production Science 52, no. 7 (2012): 431. http://dx.doi.org/10.1071/an11213.
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American bison grow a thick coat of fibres which assists them to withstand severe climatic conditions. Bison fibre was traditionally used in textiles by native North Americans. This study aimed to quantify the production, fibre attributes and dehairing processing of bison fibre produced from bison grazed in north-eastern Victoria. Three age/sex classes were sampled (n = 16) at seven body positions in spring. The fibre growing area was measured. Fibre was tested for diameter distribution, clean washing yield, proportion of fine fibres <36 µm and fine fibre length, and processed by cashmere dehairing. Bison were 1–2 years of age, liveweights 160–450 kg and had mean fibre growing area of 1.4 m2. They produced an average 1184 g (range 530–1640 g) of fine fibre with mean fibre diameter 18.5 µm, clean washing yield 76.5%, wax content 9.8%, suint content 14.5%, clean fine fibre yield 56.4%, fine fibre length 37 mm and fibre curvature was 93°/mm. Mid-side fibre had a crimp frequency of 6.5/cm and mean resistance to compression of 6.6 kPa. Fibre had a tenacity of 8.7 cN/tex and an extension of 39.3%. Restricted maximum likelihood mixed model analysis showed age/sex class and sampling site significantly affected all fibre attributes. Finer and longer fibre was produced in anterior sites and in younger bison. Fibre curvature declined 5.3°/mm for each 1-µm increase in mean fibre diameter. Dehaired fibre had a mean fibre diameter of 17.8 µm and mid-length of 28 mm, suitable for woollen spinning. The production by bison of coats containing significant amounts of fibre indicates that careful harvesting of fibre could form an important source of income in bison enterprises.
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Hernandez-Estrada, Albert, Mehedi Reza, and Mark Hughes. "The structure of dislocations in hemp (Cannabis sativa L.) fibres and implications for mechanical behaviour." BioResources 15, no. 2 (February 21, 2020): 2579–95. http://dx.doi.org/10.15376/biores.15.2.2579-2595.
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Elementary fibres isolated from mechanically processed technical hemp were axially sectioned and imaged with transmission electron microscopy (TEM) to reveal details of the axial morphology of dislocations in the fibre. The overall aim was to investigate the detailed axial structural changes that the fibres undergo during processing, to help better understand the alterations in the deformation behaviour the fibres undergo following processing. The images showed the structure and morphology of dislocations as well as the different forms of damage that processing produced in the fibre structure, such as misalignment of the microfibrils, delamination, and buckled cellulose microfibrils. Furthermore, the results of this work show the ability that axial sectioning of the fibre has to reveal new details of the cell wall structure of hemp to offer new insights in the study of the fibre structure. In turn, the results of this work may help explain the mechanical behaviour of the fibres when they are loaded, as well as help explain the greater chemical accessibility of dislocations, for example, when the fibre is acid hydrolysed.
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Deng, Xinying, Ming Shun Hoo, Yi Wen Cheah, and Le Quan Ngoc Tran. "Processing and Mechanical Properties of Basalt Fibre-Reinforced Thermoplastic Composites." Polymers 14, no. 6 (March 17, 2022): 1220. http://dx.doi.org/10.3390/polym14061220.
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Basalt fibre is derived from volcanic rocks and has similar mechanical properties as glass fibre. However, poor fibre-matrix compatibility and processing issues are the main factors that have restricted the mechanical performance of basalt fibre-reinforced thermoplastic composites (BFRTP). In this work, basalt continuous fibre composites with polypropylene (PP) and polycarbonate (PC) matrices were studied. The composites were processed by compression moulding, and a processing study was conducted to achieve good quality composites. For the BF-PC composites, the optimisation of material preparation and processing steps allowed the polymer to impregnate the fibres with minimal fibre movements, hence improving impregnation and mechanical properties. For BF-PP composites, a compatibiliser was required to improve fibre-matrix compatibility. The compatibiliser significantly improved the tensile and impact strength values for short BF-PP composites and continued to increase at 40 wt%. Furthermore, the analytical modelling of the Young’s moduli indicated that the induced fibre orientation during processing for short BF-PP composites and unidirectional (UD) BF-PC composites had better stress transfer than that of UD BF-PP composites.
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Pecenka, Ralf, Carsten Lühr, and Hans-Jörg Gusovius. "Design of Competitive Processing Plants for Hemp Fibre Production." ISRN Agronomy 2012 (July 24, 2012): 1–5. http://dx.doi.org/10.5402/2012/647867.
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Despite an annually growing demand for natural fibres accompanied by worldwide increasing fibre prices as well as long tradition and experience in fibre processing, the production facilities for hemp and flax fibres are very limited in Europe. At present, the lack of modern harvesting and economic processing technologies seem to be the greatest obstacles for hemp fibre producers under the changing conditions of international raw material markets. Therefore, detailed investigations of all process stages of hemp fibre processing have been carried out at the Leibniz Institute for Agricultural Engineering (ATB). A novel hemp processing line has been developed, installed, and tested at industrial scale in the last 3 years. Investigations regarding optimum plant layout have shown that a straw throughput of approximately 4 t h−1 is required for economic fibre production for all new processing lines at currently high straw prices of more than 150 € t−1. Throughputs in the range from 4 to 6 t h−1 showed a favourable relation between profit and investment cost. At throughputs higher than 6 t h−1, the profit per ton processed straw can be further increased. But investment and straw logistic cost increase at these high-throughput levels often much faster.
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Zhang, Jie, Hua Zhang, and Jian Chun Zhang. "Actions of Temperature on the Structure and Properties of Hemp Fibre." Advanced Materials Research 557-559 (July 2012): 1483–86. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.1483.
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As to demonstrate the effect of treatment temperature on hemp fibre, this article recorded and compared the change of supramolecular structure and properties of hemp fibre under different processing temperature (150°C and -30°C). The result shows: the change of processing temperature can affect the crystallinity of hemp fibre, with the rise of treatment time, the crystallinity of fiber increases at high temperature and is contrary at low temperature. Meantime, the degree of thermodynamic change is higher at low processing temperature than that of high temperature. Furthermore, with the rise of treatment time, the moisture regain of fibre fluctuates under high temperature and rises under low temperature.
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Bolton, James. "The Potential of Plant Fibres as Crops for Industrial Use." Outlook on Agriculture 24, no. 2 (June 1995): 85–89. http://dx.doi.org/10.1177/003072709502400204.
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At some time in the future, fibres produced on agricultural land will contribute significantly to the world fibre supply. Such fibres might come from residues or from dedicated fibre crops harvested annually. Dedicated fibre crops will become a reality sooner if agriculture can produce fibres more competitively than forestry. New markets for plant fibre may also help the farmer. Long-fibre crops (flax, hemp, kenaf) have particular promise providing that production costs are competitive with those for Third World fibres, or that a technological edge in processing can be established.
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Hengstermann, Martin, Karl Kopelmann, Andreas Nocke, Anwar Abdkader, and Chokri Cherif. "Development of a new hybrid yarn construction from recycled carbon fibres for high-performance composites: Part IV: Measurement of recycled carbon fibre length." Journal of Engineered Fibers and Fabrics 15 (January 2020): 155892502091072. http://dx.doi.org/10.1177/1558925020910729.
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Due to the increasing application of carbon fibre–reinforced plastics, the use of recycled carbon fibres can help reduce the tremendous amount of carbon fibre waste growing worldwide. In this context, the processing of longer recycled carbon fibres (>40 mm mean length) into hybrid yarn constructions offers a promising solution. The characterisation of recycled carbon fibre length is essential for textile processes. However, to suit the atypical fibre characteristics of recycled carbon fibres compared to standard natural or man-made-fibres, the development of an adequate measuring technique is required. Investigations on the state of the art suggest that an adapted fibrograph method might pose an appropriate measuring system. Therefore, new test equipment and an alternative image analysing method based on pixel greyscale values were developed. To enable a calibration process, different samples with cut carbon fibre from carded and drafted slivers were intensively tested and compared. In addition, an adapted reference method was investigated by combining single fibre measurement and image processing techniques. In a final step, recycled carbon fibres samples with unknown fibre length were tested. Results proved that the presented measuring system is adequate for the testing of longer recycled carbon fibres in webs or slivers. All measured values were close to the measured reference length values (deviation ±4%).
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Khurshid, Muhammad Furqan, Martin Hengstermann, Mir Mohammad Badrul Hasan, Anwar Abdkader, and Chokri Cherif. "Recent developments in the processing of waste carbon fibre for thermoplastic composites – A review." Journal of Composite Materials 54, no. 14 (November 7, 2019): 1925–44. http://dx.doi.org/10.1177/0021998319886043.
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The aim of this paper is to highlight recent developments in the processing of waste carbon fibre for thermoplastic composites. Initially, injection moulding and nonwoven technologies have been used to integrate waste carbon fibres into fibre-reinforced thermoplastic composites. Recently, tape and hybrid yarn spinning technologies have been developed to produce tape and hybrid yarn structures from waste carbon fibre, which are then used to manufacture recycled carbon fibre-reinforced thermoplastics with much higher efficiency. The hybrid yarn spinning technologies enable the development of various fibrous structures with higher fibre orientation, compactness and fibre volume fraction. Therefore, thermoplastic composites manufactured from hybrid yarns possess a good potential for use in load-bearing structural applications. In this paper, a comprehensive review on novel and existing technologies employed for the processing of waste carbon fibre in addition to different quality aspects of waste carbon fibre is presented.
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JOLLY, MARC, and KRISHNAN JAYARAMAN. "MANUFACTURING FLAX FIBRE-REINFORCED POLYPROPYLENE COMPOSITES BY HOT-PRESSING." International Journal of Modern Physics B 20, no. 25n27 (October 30, 2006): 4601–6. http://dx.doi.org/10.1142/s0217979206041756.
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The renewable characteristic of natural fibres, such as flax, and the recyclable nature of thermoplastic polymers, such as polypropylene, provide an attractive eco-friendly quality to the resulting composite materials. Common methods for manufacturing natural fibre-reinforced thermoplastic composites, injection moulding and extrusion, tend to degrade the fibres during processing. Development of a simple manufacturing technique for these composites, that minimises fibre degradation, is the main objective of this study. Flax fibres were conditioned, cut into lengths ranging from 1 mm to 30 mm with scissors and a pelletiser, and shaped into randomly oriented mats using a drop feed tower. Polypropylene in sheet form, was added to the fibres to furnish polypropylene/flax/polypropylene sandwiches with a fibre mass fraction of 25%, which were then consolidated by the hot pressing technique. Tensile, flexural and impact properties of these composite sheets were determined as functions of fibre length and processing temperature.
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Dong, Chensong. "Review of natural fibre-reinforced hybrid composites." Journal of Reinforced Plastics and Composites 37, no. 5 (December 3, 2017): 331–48. http://dx.doi.org/10.1177/0731684417745368.
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Natural fibre-reinforced hybrid composites which contain one or more types of natural reinforcement are gaining increasing research interest. This paper presents a review of natural fibre-reinforced hybrid composites. Both thermoplastic and thermoset composites reinforced by hybrid/synthetic fibres or hybrid/hybrid fibres are reviewed. The properties of natural fibres, the properties and processing of composites are summarised.
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Panthapulakkal, S., and M. Sain. "Preparation and Characterization of Cellulose Nanofibril Films from Wood Fibre and Their Thermoplastic Polycarbonate Composites." International Journal of Polymer Science 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/381342.
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The aim of this study was to develop cellulose-nanofibril-film-reinforced polycarbonate composites by compression molding. Nano fibres were prepared from wood pulp fibres by mechanical defibrillation, and diameter distribution of the fibres produced was in the range of 1–100 nm. Nanofibre films were prepared from the nanofibre suspensions and were characterized in terms of strength properties, crystallinity, and thermal properties. Strength and modulus of the nano fibre films prepared were 240 MPa and 11 GPa, respectively. Thermal properties of the sheets demonstrated the suitability of processing fibre sheets at high temperature. Tensile properties of the films subjected to composite-processing conditions demonstrated the thermal stability of the fibre films during the compression molding process. Nanocomposites of different fibre loads were prepared by press-molding nano fibre sheets with different thickness in between polycarbonate sheet at 205°C under pressure. The tensile modulus and strength of the polycarbonate increased with the incorporation of the fibres. The strength of the thermoplastic increased 24% with 10% of the fibres and is increased up to 30% with 18% of the fibres. Tensile modulus of the polycarbonate demonstrated significant enhancement (about 100%).
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FOREST, M. GREGORY, and HONG ZHOU. "Unsteady analyses of thermal glass fibre drawing processes." European Journal of Applied Mathematics 12, no. 4 (August 2001): 479–96. http://dx.doi.org/10.1017/s0956792501004557.
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Fibre drawing is an important industrial process for synthetic polymers and optical communications. In the manufacture of optical fibres, precise diameter control is critical to waveguide performance, with tolerances in the submicron range that are met through feedback controls on processing conditions. Fluctuations arise from material non-uniformity plague synthetic polymers but not optical silicate fibres which are drawn from a pristine source. The steady drawing process for glass fibres is well-understood (e.g. [11, 12, 20]). The linearized stability of steady solutions, which characterize limits on draw speed versus processing and material properties, is well-understood (e.g. [9, 10, 11]). Feedback is inherently transient, whereby one adjusts processing conditions in real time based on observations of diameter variations. Our goal in this paper is to delineate the degree of sensitivity to transient fluctuations in processing boundary conditions, for thermal glass fibre steady states that are linearly stable. This is the relevant information for identifying potential sources of observed diameter fluctuation, and for designing the boundary controls necessary to alter existing diameter variations. To evaluate the time-dependent final diameter response to boundary fluctuations, we numerically solve the model nonlinear partial differential equations of thermal glass fibre processing. Our model simulations indicate a relative insensitivity to mechanical effects (such as take-up rates, feed-in rates), but strong sensitivity to thermal fluctuations, which typically form a basis for feedback control.
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Gonzalez, C., and J. Llorca. "Mechanical Properties of Sigma 1140+ Sic Fibres Prior and after Composite Processing." Advanced Composites Letters 9, no. 4 (July 2000): 096369350000900. http://dx.doi.org/10.1177/096369350000900406.
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The effect of processing on the mechanical properties of Sigma 1140+ SiC fibres was studied through tensile tests carried out on pristine Sigma 1140+ SiC fibres and on fibres extracted from a Ti-6A1-4V-matrix composite. The elastic modulus and the tensile strength were computed after measuring carefully the fibre diameter. The characteristic fibre strength was reduced by 20% and the Weibull modulus by half during composite processing. The analysis of the fracture surfaces in the scanning electron microscope showed that the strength-limiting defects were located around the tungsten core in pristine fibres and predominantly at the surface in fibres extracted from the composite panels. These latter defects were nucleated by the mechanical stresses generated on the fibres during the panel consolidation.
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Franzén, B., C. Klason, J. Kubát, and T. Kitano. "Fibre degradation during processing of short fibre reinforced thermoplastics." Composites 20, no. 1 (January 1989): 65–76. http://dx.doi.org/10.1016/0010-4361(89)90684-8.
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Tonoli, Gustavo Henrique Denzin, M. N. Belgacem, G. Siqueira, J. Bras, Lourival M. Mendes, F. A. Rocco Lahr, and H. Savastano Jr. "Processing Changes of Cement Based Composites Reinforced with Silane and Isocyanate Eucalyptus Modified Fibres." Key Engineering Materials 517 (June 2012): 437–49. http://dx.doi.org/10.4028/www.scientific.net/kem.517.437.
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Fibre-cement products had been widely used in the world due to their versatility as corrugated and flat roofing materials, cladding panels and water containers presented in large number of building and agriculture applications. The main reason for incorporating fibres into the cement matrix is to improve the toughness, tensile strength, and the cracking deformation characteristics of the resultant composite. One of the drawbacks associated with cellulose fibres in cement application is their dimensional instability in the presence of changing relative humidity. The objective of the present work is to evaluate the effect of surface treatment of eucalyptus cellulose pulp fibres on the processing and dimensional changes of fibre-cement composites. Surface modification of the cellulose pulps was performed with methacryloxypropyltri-methoxysilane (MPTS), aminopropyltri-ethoxysilane (APTS) and n-octadecyl isocyanate, an aliphatic isocyanate (AI), in an attempt to improve their dimensional instability into fibre-cement composites. X-ray photoelectron spectroscopy (XPS) showed the chemical changes occurred at the surface, and contact angle measurements showed the changes in the surface energy. MPTS-and AI-treated fibres presented lower hydrophilic character than untreated fibres, which led to lower water retention values (WRV). APTS increased the water retention value of the pulp and improved the capacity of hydrogen bonding of the fibres. MPTS-and AI-treated fibres led to low final water/cement ratios and reduced volume changes after pressing. MPTS-treated fibres decreased the water and dimensional instability of the fibre-cement composites, while the contrary occurred with APTS-modified and AI-modified fibres.These results are promising and contribute for new strategy to improve processing and stability of natural fibres-reinforced cement products.
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Soete, Karen, Frederik Desplentere, Stepan V. Lomov, and Dirk Vandepitte. "Variability of flax fibre morphology and mechanical properties in injection moulded short straw flax fibre-reinforced PP composites." Journal of Composite Materials 51, no. 23 (December 13, 2016): 3337–49. http://dx.doi.org/10.1177/0021998316683781.
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The influence of compounding and injection moulding on the initial variability and morphology of short straw flax fibres is determined and the mechanical properties for the injection moulded fibre reinforced composites are measured. It is found that the composition of the straw flax, flax fibre bundles and woody parts, together with the cutting process strongly affects the initial fibre morphology and its variability. In the initial fibres, small particles as well as long fibres with large width were found. A filter was used to reject the fibres with an aspect ratio below 15 before calculating statistics because these fibres have a negligible contribution to the composite reinforcement. After processing, the initial fibre length and width decrease strongly (−38% to −66% for length and −22% to −72% for width). Also, the variability is affected resulting in a standard deviation shifted towards lower fibre lengths and widths (−55% for length and −71% for width). The improvement of mechanical properties of the flax compound compared to the pure matrix material for the injection-moulded samples is found to be similar to the results for compounds with further processed flax fibres such as scutched and hackled fibres. An increase of tensile strength by 20% was found, for stiffness the increase is in the order of 50–70%. This indicates that despite the very large variability of the initial straw flax fibres and the strong changes of the variability in each processing step, a compound is obtained with improved mechanical properties.
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Ullrich, Julia, Martin Eisenreich, Yvonne Zimmermann, Dominik Mayer, Nina Koehne, Jacqueline F. Tschannett, Amalid Mahmud-Ali, and Thomas Bechtold. "Piezo-Sensitive Fabrics from Carbon Black Containing Conductive Cellulose Fibres for Flexible Pressure Sensors." Materials 13, no. 22 (November 16, 2020): 5150. http://dx.doi.org/10.3390/ma13225150.
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The design of flexible sensors which can be incorporated in textile structures is of decisive importance for the future development of wearables. In addition to their technical functionality, the materials chosen to construct the sensor should be nontoxic, affordable, and compatible with future recycling. Conductive fibres were produced by incorporation of carbon black into regenerated cellulose fibres. By incorporation of 23 wt.% and 27 wt.% carbon black, the surface resistance of the fibres reduced from 1.3 × 1010 Ω·cm for standard viscose fibres to 2.7 × 103 and 475 Ω·cm, respectively. Fibre tenacity reduced to 30–50% of a standard viscose; however, it was sufficient to allow processing of the material in standard textile operations. A fibre blend of the conductive viscose fibres with polyester fibres was used to produce a needle-punched nonwoven material with piezo-electric properties, which was used as a pressure sensor in the very low pressure range of 400–1000 Pa. The durability of the sensor was demonstrated in repetitive load/relaxation cycles. As a regenerated cellulose fibre, the carbon-black-incorporated cellulose fibre is compatible with standard textile processing operations and, thus, will be of high interest as a functional element in future wearables.
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Mohan, T. P., and K. Kanny. "Mechanical Properties and Failure Analysis of Short Kenaf Fibre Reinforced Composites Processed by Resin Casting and Vacuum Infusion Methods." Polymers and Polymer Composites 26, no. 2 (February 2018): 189–204. http://dx.doi.org/10.1177/096739111802600207.
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Modified and unmodified short kenaf fibre reinforced epoxy composites were processed with different short fibre lengths and fibre concentrations by resin casting (RC) and vacuum-assisted resin infusion (VARIM) methods. Three types of kenaf fibres were reinforced in epoxy polymer, namely, untreated kenaf fibre, mercerised and nanoclay-infused kenaf fibres. The mechanical properties such as tensile, flexural and impact properties of composites were studied. Nanoclay infused kenaf fibres have shown better tensile, flexural and impact properties than those of untreated and mercerised fibres. The composites processed by VARIM possess improved tensile and flexural properties when compared with RC composites, whereas the impact properties were better in RC composites than those of VARIM processed composites. The results showed that the mechanical properties of composites depend on the short fibre length and fibre concentration, irrespective of the processing conditions. Improved water barrier properties were also obtained in nanoclay-treated banana fibre composites.
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Othman, M. H., Sulaiman Hasan, Mohd Halim Irwan Ibrahim, and Siti Zubaidah Khamis. "Optimum Injection Moulding Processing Condition to Reduce Shrinkage and Warpage for Polypropylene-Nanoclay-Bamboo Fibre with Compatibilizer." Materials Science Forum 889 (March 2017): 51–55. http://dx.doi.org/10.4028/www.scientific.net/msf.889.51.
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The purpose of this research is to optimise the processing condition of injection moulding towards samples made from polypropylene-nanoclay-bamboo fibre with compatibilizer. The defects that have been controlled upon the optimisation were shrinkage and warpage. The selection of injection moulding processing condition was packing pressure, melt temperature, screw speed and filling time. The research started by drying the bamboo fibres at 120°C. Then, the 1 wt. % fibres were mixed with 79 wt. % of polypropylene, 15 wt. % of compatibilizer and 5 wt. % of nanoclay. The mixing process was performed by using Brabender Plastograph machine. After that, pallets were produced by using Plastic Granulator machine for injection moulding process. The optimisation process was accomplished by adopting the Taguchi method. According to the results, the value of warpage defect between compounding for 1 wt. % fibre and without fibre content was not significant. However the optimum setting of 170°C melt temperature, 35% packing pressure, 30% screw speed and 2 seconds filling time can significantly reduce shrinkage. In conclusion, the optimum processing condition of polypropylene-nanoclay, fibre bamboo had been achieved, and the existence of fibre obviously giving a promising manufacturing opportunity to improve the quality of the injected moulding products.
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Tiziani, C., M. Götting, and J. Rösler. "Processing and mechanical behaviour of a dual scale particle strengthened copper composite." International Journal of Materials Research 97, no. 11 (November 1, 2006): 1579–85. http://dx.doi.org/10.1515/ijmr-2006-0246.
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Abstract Oxide dispersion strengthened (ODS) and dual scale particle strengthened (DSPS) copper composites were successfully manufactured by a powder metallurgical processing route, containing Al2O3 particles with a mean diameter of 17 nm as dispersoids and, in the case of the DSPS material, 15% tungsten fibres about 3 mm long. Their mechanical behaviour was investigated at ambient and elevated temperatures. The ODS material displayed mechanical properties comparable to those of commercial GlidCop® alloys. Addition of tungsten fibres in case of the DSPS material increased the elevated temperature flow strength relative to the ODS counterpart by about 12 %. This result is rationalised by finite element calculations, taking fibre orientation, plastic deformation of the fibres as well as the role of the fibre coating into account.
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Lu, Xun, Ming Qiu Zhang, Min Zhi Rong, Guang Shi, Gui Cheng Yang, and Han Min Zeng. "Natural Vegetable Fibre / Plasticised Natural Vegetable Fibre - a Candidate for Low Cost and Fully Biodegradable Composite." Advanced Composites Letters 8, no. 5 (September 1999): 096369359900800. http://dx.doi.org/10.1177/096369359900800505.
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A novel fibre composite consisting of natural vegetable fibre as the reinforcer and plasticised natural vegetable fibre as the matrix was studied. By means of cyanoethylation and chlorination, pine sawdust and chopped sisal were converted into thermoplastics and then compounded with sisal and ramie fibres. The natural fibre composite not only exhibits properties similar to those of conventional fibre composites, but also is characterised by easy processing, enviromental frendliness, low cost and capability of tailoring property due to the physically heterogeneous nature.
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Kesavelu, Dr Dhanasekhar, and Dr Nithya Franklyn. "Review on the role and recommendation for dietary fibers in Childhood constipation." International Journal of Medical Science and Clinical Invention 8, no. 01 (January 27, 2021): 5214–18. http://dx.doi.org/10.18535/ijmsci/v8i01.06.
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The plant material in the diet that is resistant to enzymatic digestion is defined as “dietary fibre”. The primary ingredients that are classified as dietary fibres are cellulose, hemicellulose, pectic substances, gums, mucilages and lignin etc. Dietary fibre naturally exist in foods that are consumed daily viz.,cereals, fruits, vegetables and nuts. The diets with high content of fibre have shown benefits in multiple areas and systems in maintaining a mileu’-interior. Processing of foods leads to various changes in physical, chemical, enzymatic and thermal treatments, which may affect the composition of total fiber present in the diet.Fibres included in the diet leads to various changes in the qualitative aspects of the food that is processed. Favourable outcomes have been reported in various commodities such as cereals,bread,yoghurt and beverages. The importance and the uses of fibres in diet is an area of constant interest which needs to be explored further and our paper reviews and explains the relation between dietary fibres and their benefits, primarily in children [1]
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Butorac, Jasminka, Ružica Brunšek, Milan Pospišil, and Zvjezdana Augustinović. "The Influence of Water Hardness on the Agronomic Traits of Foreign Fibre Flax Varieties in the Republic of Croatia." TEKSTILEC 65, no. 3 (October 19, 2022): 218–26. http://dx.doi.org/10.14502/tekstilec.65.2022031.
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The amount and quality of fibres depend on a whole range of factors, the most important being variety, agroecological conditions, agrotechnics and the degree of fibre flax plant maturity, the purpose for which flax is grown, retting and processing. The retting of fibre flax is the most complex stage in the processing of flax into fibre. The aim of this study was to gain knowledge about the acclimatization ability of foreign varieties that can potentially be adapted to climatic in Republic Croatia. Therefore, this paper presents the results of achieved agronomic traits (dry stem yield, dry stem after retting, total fibre yield, long fibre yield, share of total fibre and share of long fibre) of five foreign varieties of fibre flax. The selected varieties were retted in very soft, medium hard and hard water. Variety trials with fibre flax were set up over three years (2012–2014) at two locations (Zagreb) on anthropogenized eutric cambisol and (Križevci) on pseudogley on level terrain. The trials were carried out according to the RCBD in four replications. According to the results of the three-year research into the agronomic traits of fibre flax, significant differences were identified among the varieties studied. The varieties Agatha, Viola and Electra recorded the highest values of studied traits. Statistically significant differences were only recorded among different water hardness for long fibre yield in 2012 and share of total fibre in 2013 in Zagreb. The highest yields and share of fibres were recorded when the fibre flax was retted in very soft water.
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Lowe, Paul, Michael Brown, and Kathleen Hudson. "The influence of fibres on the structure of thermally dried sludge product." Water Science and Technology 34, no. 3-4 (August 1, 1996): 469–73. http://dx.doi.org/10.2166/wst.1996.0465.
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There appears to be a limited experience world-wide in the application of thermal drying technology to processing raw undigested sludge. This limited experience has shown that the products from raw sludge processing have a much lower bulk density than those from digested sludge. The apparent reason for this phenomenon demonstrated by this work, is the high concentration of fibres in the raw undigested sludge. Different sludges show varying degrees of fibre concentration with a decrease in fibre content as the proportion of secondary sludge increases. The relationship between the bulk density of the product and the fibre content are given and this shows that as the fibre content increases the bulk density of the product will fall. It is recommended that a compaction/pelletisation stage is included in the process stream for high fibre sludges.
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Tandon, Surinder. "Inter-fibre Cohesion Behaviour of New Zealand Wools." Research Journal of Textile and Apparel 19, no. 3 (August 1, 2015): 16–22. http://dx.doi.org/10.1108/rjta-19-03-2015-b003.
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Inter-fibre cohesion is regarded as an important property of assemblies, such as slivers, made of wool or any other fibres, with respect to the processing in carding, drawing (gilling) and spinning. In this paper, the results of the multiple regression analyses, and their validation, are presented to show that a strong relationship exists between the sliver cohesion (measured as sliver tenacity and sliver specific energy-to-break in a long-gauge tensile test) and a combination of the standard wool properties, such as bulk, mean fibre length (Barbe), mean fibre diameter and medullation content, used for the objective blend specification of New Zealand wools for marketing and processing.
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Anyakora, Dr A. N., and Dr E. Mudiare. "Exploration of Green Composites of Oil Palm Frond for Low Strength-Moderate Flexure Building Applications." International Journal Of Engineering And Computer Science 7, no. 02 (February 16, 2018): 23567–77. http://dx.doi.org/10.18535/ijecs/v7i2.08.
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The exploration of new materials with comparative performance at affordable costs facilitated the outcome of emerging innovative products of green composite materials. In the current work, natural oil palm frond fibres were used in long and random fiber form as reinforcement in polyester matrix to fabricate green composites using the hand layup technique. Some mechanical, physical and processing property tests were conducted to elucidate the utilization potentials of green composites of oil palm frond fibre in the building industry. In overall, the results showed that the tensile strength and impact strength properties decreased with the increase in fibre loading. The modulus of elasticity increased with the increase in fibre loading up to 60wt. % before dropping. The values of both the flexural strength properties and modulus of rigidity increased with the increase in fibre loading. Even though the fibres were used without surface treatment in this work, the result of respective values of 0.07, 4.27% and 2.08 for the mould linear shrinkage, porosity and specific gravity, including a low water absorption uptake of 6.98%, propounds an indication that green composites of oil palm frond could be acceptable in areas of low strength and moderate flexure applications in the building industry.
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Chaishome, Jedsada, and Suriyan Supapvanich. "Polylactic acid (PLA) based green composites reinforced pineapple leaf fibres: evaluation of processing and tensile performance." MATEC Web of Conferences 192 (2018): 03002. http://dx.doi.org/10.1051/matecconf/201819203002.
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This paper reports on a study of the compression moulding and the vacuum forming of unidirectional pineapple leaf fibres/polylactic acid composites and the influence of process variables on the tensile properties of the material. The characterisation of the micro and meso structures of the pineapple leaf fibres is reported. The effect of consolidation temperature on the fibre thermal stability and the tensile properties of the composites is investigated. The results show that vacuum forming was found to be preferable process with high stiffness modulus and UTS of the composites, compared to compression moulding. The insignificant detrimental effect of 165°C high consolidation temperature was observed. Finally, the fibre thermal degradation seems to dominate the composite tensile performance over its interfacial quality between the fibre and the matrix.
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Benoit, Nathalie, Rubén González-Núñez, and Denis Rodrigue. "Long-term closed-loop recycling of high-density polyethylene/flax composites." Progress in Rubber, Plastics and Recycling Technology 34, no. 4 (October 24, 2018): 171–99. http://dx.doi.org/10.1177/1477760618797534.
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This work investigates the loss of performance and the recyclability of natural fibre composites for a long-term closed-loop process. Composites based on flax fibres and high-density polyethylene are subjected up to 50 extrusion cycles under constant processing conditions with or without maleic anhydride grafted polyethylene as a coupling agent. The results show that the addition of fibre increases the rigidity but decreases the elongation properties. The initial processing cycle leads to an important decrease of the fibre length and modification of the molecular weight distributions, thus indicating that the addition of fibre enhances chain scission and that fibre breakup mainly happens during the initial processing. The effect of recycling is much less significant, except for the mechanical properties. Negligible variations are observed for density, differential scanning calorimetry, thermogravimetric analysis, gel permeation chromatography and impact results. On the contrary, the mechanical properties are strongly affected by recycling as most of them increase with recycling. The addition of a coupling agent improves the composite properties, but this effect disappears with recycling. These trends are associated to a balance between fibre breakup and macromolecular chain scission compared to more homogeneous materials (better fibre distribution) taking place in the materials during recycling. The results show that long-term recycling of composites is possible as their overall performances remain acceptable.
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Vaidya, U. K., and K. K. Chawla. "Processing of fibre reinforced thermoplastic composites." International Materials Reviews 53, no. 4 (July 2008): 185–218. http://dx.doi.org/10.1179/174328008x325223.
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Guebitz, Georg M., Johanna Buchert, Artur Cavaco-Paulo, and Elisabeth Heine. "Advances in biotechnology for fibre processing." Biotechnology Letters 28, no. 10 (May 2006): 679–80. http://dx.doi.org/10.1007/s10529-006-9040-8.
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Jose, Seiko, S. Rajna, and P. Ghosh. "Ramie Fibre Processing and Value Addition." Asian Journal of Textile 7, no. 1 (December 15, 2016): 1–9. http://dx.doi.org/10.3923/ajt.2017.1.9.
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ANITA DAS RAVINDRANATH. "PROCESSING OF COIR A BIOLOGICAL APPROACH TO RETTING OF COCONUT HUSKS." CORD 7, no. 02 (June 1, 1991): 34. http://dx.doi.org/10.37833/cord.v7i02.253.
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White coir fibre is extracted from coconut husks after 'retting' for a period varying between six to ten months depending upon several environmental factors. With a view to explore the possibility of reducing the prolonged period required for retting and improving the quality of the coir fibre a field study was conducted at Azhikode in the N. Parur regions of Kerala which is a 'poor'* retting area. Selected strains of efficient pectin and phenol degrading bacterial cultures were inoculated into pits containing lots of husks soaked for retting. Samples of husks were analysed at regular intervals for details of degradation of the husk constituents holding the individual fibres together. It was observed that inoculation of the bacterial strains could shorten the period of retting by two and a half months and yield an improved quality of fibre with respect to colour and texture. The detaiis of the experimental field study are presented in this paper.
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Madueke, C. I., R. Umunakwe, and O. M. Mbah. "A review on the factors affecting the properties of natural fibre polymer composites." Nigerian Journal of Technology 41, no. 1 (May 15, 2022): 55–64. http://dx.doi.org/10.4314/njt.v41i1.9.
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Improved quality natural fibre composites cannot be achieved without considering certain factors such as the degree of uniformity of the fibre, wettability of the fibre, fibre length, fibre volume fraction, type of matrix, interfacial bond strength, fibre orientation, compatibility of the fibre with the resin, processing parameters and manufacturing techniques among others. Their influences on the properties of the composites with typical examples from previous works were highlighted. The exact or approximate volume fractions of specific fibres in specific resins for optimal performance in composites are lacking. Epoxy, low density polyethylene, polystyrene and polyester resins were mostly used as matrix for natural fibre composites. Epoxy resins possess higher tensile and flexural strengths than polyester resins. Significant differences in the tensile strength and Young’s modulus of natural fibre polymer composites were observed with changes in the orientation and length of the fibres particularly when the differences in length are significant. Other relevant issues affecting natural fibre composites were buttressed with the aim of improving the properties of natural fibre polymer composites for advanced applications.
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Decker, Eric A., Devin J. Rose, and Derek Stewart. "Processing of oats and the impact of processing operations on nutrition and health benefits." British Journal of Nutrition 112, S2 (September 30, 2014): S58—S64. http://dx.doi.org/10.1017/s000711451400227x.
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Oats are a uniquely nutritious food as they contain an excellent lipid profile and high amounts of soluble fibre. However, an oat kernel is largely non-digestible and thus must be utilised in milled form to reap its nutritional benefits. Milling is made up of numerous steps, the most important being dehulling to expose the digestible groat, heat processing to inactivate enzymes that cause rancidity, and cutting, rolling or grinding to convert the groat into a product that can be used directly in oatmeal or can be used as a food ingredient in products such as bread, ready-to-eat breakfast cereals and snack bars. Oats can also be processed into oat bran and fibre to obtain high-fibre-containing fractions that can be used in a variety of food products.
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Kumar, Naresh, Piyush Gaur, S. Kaliappan, L. Natrayan, S. Socrates, Pravin P. Patil, and Subash Thanappan. "Processing and Characterization of Novel Bio-Waste Hybrid Brick Composites for Pollution Control." Bioinorganic Chemistry and Applications 2022 (July 21, 2022): 1–8. http://dx.doi.org/10.1155/2022/3127135.
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The main focus of this research is to enhance the use of eco-friendly materials these days. The current materials used in building construction are chemical-based and are harmful to humans and the environment. This research work has developed a new type of hybrid brick by using natural fibres and waste materials. This research focuses on fabricating novel bricks reinforced with different percentages of coconut waste fibre, wheat straw fibre, waste wood animal dung ash, gypsum, sand, and cement. The fabricated novel brick’s physical, mechanical, chemical, acoustic, and heat-absorbing properties were evaluated.
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Malekipoor, Rahil, Stuart K. Johnson, and Rewati R. Bhattarai. "Lupin Kernel Fibre: Nutritional Composition, Processing Methods, Physicochemical Properties, Consumer Acceptability and Health Effects of Its Enriched Products." Nutrients 14, no. 14 (July 11, 2022): 2845. http://dx.doi.org/10.3390/nu14142845.
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The kernels (dehulled seeds) of lupins (Lupinus spp.) contain far higher dietary fibre levels than other legumes. This fibre is a complex mixture of non-starch polysaccharides making up the thickened cell walls of the kernel. The fibre has properties of both insoluble and soluble fibres. It is a major by-product of the manufacture of lupin protein isolates, which can be dried to produce a purified fibre food ingredient. Such an ingredient possesses a neutral odour and flavour, a smooth texture, and high water-binding and oil-binding properties. These properties allow its incorporation into foods with minimum reduction in their acceptability. The lupin kernel fibre (LKF) has demonstrated beneficial effects in clinical studies on biomarkers for metabolic diseases such as obesity, type 2 diabetes, and cardiovascular disease. It can be described as a “prebiotic fibre” since it improves gut micro-floral balance and the chemical environment within the colon. Thus, LKF is a health-functional ingredient with great opportunity for more widespread use in foods; however, it is evident that more non-thermal methods for the manufacture of lupin kernel fibre should be explored, including their effects on the physicochemical properties of the fibre and the effect on health outcomes in long term clinical trials.
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Dickson, Alan, Armin Thumm, Karl Murton, and David Sandquist. "The influence of mechanical pulping treatment on the physical properties of wood fibre plastic composites." BioResources 15, no. 3 (May 29, 2020): 5532–45. http://dx.doi.org/10.15376/biores.15.3.5532-5545.
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Medium density fibreboard (MDF) fibres produced by a mechanical pulping process have shown potential for reinforcement in natural fibre composites (NFCs). In this work, the effect of process options, available in a pilot-scale fibre processing facility, on NFC properties were investigated. These were: a) refining energy; b) pre-treatment by sulphonation (i.e. chemi-thermo-mechanical pulping (CTMP)) and c) whether the extractives stream (i.e. the plug screw pressate) was discarded or included with the fibre. There were improvements in composite performance with refining energy, although these were not strong or consistent across composite properties. The CTMP fibres gave a substantial improvement over conventional MDF fibres in flexural, tensile, and impact properties, which may be due to improved fibre-matrix interfacial properties because of better mechanical interlocking and the removal of extractives.
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Fernando, Dinesh, Peter Rosenberg, Erik Persson, and Geoffrey Daniel. "Ultrastructural aspects of fibre development during the stone groundwood process: New insights into derived pulp properties." Holzforschung 61, no. 5 (August 1, 2007): 532–38. http://dx.doi.org/10.1515/hf.2007.094.
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Abstract A study was performed on stone groundwood (SGW) pulps produced on a pilot scale. The behaviour of selected juvenile and mature Norway spruce wood samples was investigated. As revealed by standard tests, sheets formed from juvenile wood showed improved light scattering properties, improved tear and tensile strength, and higher sheet density compared to those formed from mature wood. Scanning electron microscopy indicated that the differences are likely related to the manner of fibre processing and development at the ultrastructural level. Mature wood fibres showed greater fibre end breakage, a smaller long-fibre fraction, enhanced S1 fibrillation and frequently open fibres. In contrast, juvenile fibres had a 14% higher long-fibre fraction and showed typical S2 fibrillation. Fibre development of juvenile wood showed fibrillation features similar to those previously reported for thermomechanical pulp fibres. In both cases, the structural hierarchy of the wood fibre cell wall and the microfibril angle of S2 and S1 layers govern cell-wall splitting and fibrillation progression. The superior quality of the fibre furnish prepared from juvenile fibres compared to mature fibres with SGW pulping may offer an alternative process for more effective utilisation of raw materials such as top logs rich in juvenile wood.
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Larkomaa, Jaakko, Jouko Niinimäki, Markus Honkanen, Muhammad Hanif, and Pentti Saarenrinne. "Effect of Fibre Properties on Flocculation and Fractionation of Cellulosic Fibres in Dry State." Journal of Engineered Fibers and Fabrics 4, no. 4 (December 2009): 155892500900400. http://dx.doi.org/10.1177/155892500900400408.
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This paper investigates a fractionation method of cellulosic fibres in dry state. Although processing of cellulosic fibres in airstream has been utilised for decades in airlaid processes, no attempts to fractionate fibres in dry state have been reported. Our main goal is to determine how fibre properties and fibre consistency affect fibre flocculation and thus the behaviour of fibres in fractionation. Also evaluations of quality and capacity of fractionation operation are made. Pulp flocculation behaviour is measured with digital imaging and image recognition technique before and after the fractionation device. A doubleview, orthogonal imaging approach is applied obtaining statistics of three-dimensional shape, dimensions and coordinates of detected fibre flocs. Fraction and fibre properties are determined with Metso Fractionator and Metso Fiberlab. Results show that fibre behaviour in a given system strongly depends on the pulp properties. Flocculation was found to be strongly dependent on fibre consistency. Evaluation of fractionation operation was done with help of calculations of mass-reject rates and separation efficiencies. Calculations showed that highest separation efficiencies can be achieved with system when mass-reject rate is between 0.30 and 0.40.
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Вerezovsky, Yu, T. Kuzmina, N. Lialina, M. Yedynovych, and O. Lobov. "TECHNICAL AND TECHNOLOGICAL SOLUTIONS FOR PRODUCING FIBRE FROM BAST CROPS." INMATEH Agricultural Engineering 60, no. 1 (April 30, 2020): 137–46. http://dx.doi.org/10.35633/inmateh-60-16.
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The paper is devoted to solving problems related to developing scientific bases for resource-saving technologies in bast crops complex processing. The work contains theoretical and experimental research in processing flax and hemp raw materials. The work objective is to find ways to improve the production conditions for processing bast fibre plants and to solve the problems of ameliorating the qualitative and quantitative bast fibre characteristics by improving the technological features of stem material processing and structural design application to the joint connections of the devices for processing bast-fibre raw materials. The paper also analyses current trends in the flax and hemp processing industry development, investigates the technical and technological features of processing bast-fibre crop stems and assesses the directions for increasing their processing efficiency.
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Rufai, Olubukola, Mayank Gautam, Prasad Potluri, and Matthieu Gresil. "Optimisation of optical fibre using micro-braiding for structural health monitoring." Journal of Intelligent Material Systems and Structures 30, no. 2 (November 11, 2018): 171–85. http://dx.doi.org/10.1177/1045389x18810805.
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Structural health monitoring is a fast growing area used to assess the state of various structures such as aircraft, building, bridge, wind turbine, pipe, automobile through appropriate data processing and interpretation. This article presents a novel technique of optimising the conventional optical fibres used for structural health monitoring, in order to improve their mechanical properties, and handling during the manufacturing process by micro-braiding the optical fibres. This study investigates and compares the tensile properties of the both micro-braided optical fibre and conventional optical fibres through uniaxial tensile tests. Experimental results show 85% improvement in strain at failure for the micro-braided optical fibre when compared to the optical fibres. Moreover, interfacial shear strength comparison, of the braiding yarn, between optical fibres and micro-braided optical fibre (carried out through micro-bond test) has also been conducted. In addition, the effect of embedding both micro-braided and conventional optical fibre in composite was also investigated by three-point bend test. Overall, the mechanical performance of the composite was not affected by the presence of micro-braided optical fibre. This article will also discuss the process and the advantage of micro-braided optical fibre for structural health monitoring.
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Ackom, NB, and K. Tano-Debrah. "Processing pineapple pulp into dietary fibre supplement." African Journal of Food, Agriculture, Nutrition and Development 12, no. 54 (October 19, 2012): 6823–34. http://dx.doi.org/10.18697/ajfand.54.11075.
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Several tonnes of conventionally consumed dietary fibre-containing fruit components are discarded as wastes in the processing of fruits into fruit juices, resulting in the loss of food nutrients and the increased production of organic waste. A study was done to investigate the processing of pineapple pulp waste from a processing plant, into a powdered product to be used as a dietary fibre supplement. The proximate composition and the functional properties of the raw material and final product were determined. The pasting characteristics or properties of wheat flour fortified with the product up to 20 % were also determined using a viscoamylograph. The wheat flour fortified at 10 % level was used to prepare cookies and muffins after which it was subject to a performance test. Proximate analysis of the product showed crude fibre content of about 30 %; crude protein: 8.5 %; crude fat: 1.5 %; total ash: 5.2 %, and ascorbic acid: 20 mg/100 g. The fat and water absorption capacities were 2.5 g/g and 2.0 g/g of product respectively. The foaming and gelation capacities of the product were found to be 2.8 % and 12 %, respectively. Changes in the pasting characteristics of the whole-wheat flour with the 10% level of fortification were not statistically significant. Acceptance levels of the cookies and muffins made from the composite flour were high and much preference was shown for samples from the fortified flour compared to samples from whole-wheat flour without fortification. This study demonstrated a potential way of harnessing pineapple pulp, a dietary fibre source, which is lost in fruit processing. This will improve the economic value to pineapple, which is widely cultivated in Ghana. It also demonstrated a way of increasing the dietary fibre content of some popular foods to help increase the fibre intake and health of the general population.
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LEI, SHEN, ZHANG XIYING, REN XIANGFANG, and CHEN HAN. "Research status and prospect of intelligent fibres and textiles." Industria Textila 72, no. 03 (June 30, 2021): 274–83. http://dx.doi.org/10.35530/it.072.03.1747.
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Intelligent fibre is a kind of fibre that integrates sensing and information processing. It is similar to biological materialsand has intelligent functions such as self-perception, self-adaptation, self-diagnosis, and self-repair. Intelligent textilesrefer to textiles that have sensing and responding functions to the environment. Intelligent fibres and their textiles notonly have the ability to perceive and respond to external stimuli but also have the ability to adapt to the externalenvironment. In recent years, the research on intelligent fibres has achieved many results in the world, and it is widelyused in textiles and clothing industry. Therefore, this paper summarized the research status of intelligent fibre andintelligent textile worldwide, and put forward the research direction in the future. This paper introduced the propertiesand research status of five kinds of main intelligent fibres, including phase change fibre, shape memory fibre, smarthydrogel fibre, optical fibre and electronic intelligent fibre, and summarized their application in textiles. This paper alsointroduced the research status of five important intelligent textiles, including intelligent temperature control textile, shapememory textiles, waterproof and moisture permeable textile, intelligent antibacterial textile and electronic intelligenttextile. Moreover, it forecasted the development prospects of intelligent fibres and textiles, and pointed out developmentdirection in three aspects of performance optimization, green and safety, industrialization. It provided research referenceand guidance for future intelligent fibre and intelligent textile.
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Jiang, Jin Hua, Ze Xing Wang, and Nan Liang Chen. "Natural Fibre/Polypropylene Wrap Spun Yarns and Preforms for Structured Thermoplastic Composites." Materials Science Forum 675-677 (February 2011): 427–30. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.427.
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In the past decade, natural fibre composites with thermoplastic matrices had attracted many composites manufactures for the superiority of lightweight and low-cost. A major challenge for natural fibre composites was to achieve high mechanical performance at a competitive price. Composites constructed from yarn and fabric structure preforms were better than composites made from random nonwoven mats. However, the twist structure of conventional ring spun yarns prevented the full utilization of fibre mechanical properties in the final composites. In this paper, the wrapped yarns were produced by wrap spun method with flax and polypropylene (PP), in which all flax fibres were twistless, then woven to be fabric preforms. The PP fibres served as a carrier for flax fibres during processing and became the polymer matrix in the final composites. The homogenous distribution of fibre and thermoplastic matrix in preforms could be achieved before hot pressing, so that not lead to impregnate difficultly, and prevented damage to the reinforced nature fibres during processing. Composites made from the wrapped yarn demonstrated significant tensile and peeling properties. The fabric structures (include plain, twill, and basket weave) and yarn tensile orientation (in 0°, 90°, 45°), had great influence on tensile strength and elongation of preforms. The cavity thickness of hot pressing mould had different influence on the tensile strength and peeling strength of thermoplastic composites, and the mechanical properties were superior when the thickness was 0.8-1.2 mm. The microstructure of thermoplastic composites showed uniform infiltration between layers, and had good bonding interface between flax fibre and PP matrix in composites.
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Ahmad, Husam, Jonas Stiller, Erik Päßler, Daisy Nestler, Guntram Wagner, and Lothar Kroll. "Influence of Initial Fibre Length and Content Used in the Injection Moulding of CFRP on the Properties of C/C and C/C-SiC Composites." Key Engineering Materials 809 (June 2019): 171–79. http://dx.doi.org/10.4028/www.scientific.net/kem.809.171.
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The production of C/C-SiC composites comprises a three-stage process: forming (CFRP-composite), pyrolysis (C/C-composite) and liquid silicon infiltration (C/C-SiC). A new promising approach for the manufacturing of CFRP intermediate composites is the injection moulding of customised granulates (novolac resin, hardener, processing additives and short carbon fibre) produced by compounding technique. To date, a direct dosing of short carbon fibre into the compounder was technically not realisable due to fibre separation and electrostatic charging in the hopper. A possible substitute solution has been the direct feeding of a carbon fibre bundle from a roving into the compounder. However, this is associated with a severe damage of the fibres and an inaccurate adjustment of the fibres content. In the present article, new chopped carbon fibres provided with an adapted sizing to be directly dosed into the compounder are used. The fibres possess a predefined length of 3 and 6 mm and their content amounts to 50 and 58 wt.%. The influence of the initial fibre length and fibre content on the physical and mechanical properties of the resulting CFRP-, C/C-and C/C-SiC-composites is presented and discussed. In addition, the impact of fibre feeding procedure at the compounding stage on the microstructure is considered
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Yamamoto, T., L. Medina, and R. Schledjewski. "Tensile Properties of Natural Fibre Reinforced Thermoset Composites." Advanced Composites Letters 14, no. 1 (January 2005): 096369350501400. http://dx.doi.org/10.1177/096369350501400104.
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The processing and mechanical properties of natural fibre composites were investigated. Three kinds of kenafhemp-non-woven materials impregnated with an acrylic matrix were used. The natural fibre composites were press moulded and showed good mechanical properties. It was clarified on the basis of the microscopic observation of the fracture surfaces that the adhesion of natural fibres and matrix was important in order to obtain good mechanical properties.