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Auswahl der wissenschaftlichen Literatur zum Thema „Bio-composite films“
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Zeitschriftenartikel zum Thema "Bio-composite films"
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Tharasawatpipat, Chaisri, Jittiporn Kruenate, Kowit Suwannahong, and Torpong Kreetachat. "Modification of Titanium Dioxide Embedded in the Bio-Composite Film for Photocatalytic Oxidation of Chlorinated Volatile Organic Compound." Advanced Materials Research 894 (February 2014): 37–42. http://dx.doi.org/10.4028/www.scientific.net/amr.894.37.
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This research aimed to apply the Blown Film Extrusion technique to synthesize the titanium dioxide (TiO2) bio-composite films incorporated on a thin film as a photocatalyst. The biopolymer materials have great recognition via their renewable and biodegradable characteristic and the green composite has been a new challenge path to replace traditional polymer composite. In this work, TiO2/Polybutylene succinate (PBS) bio-composite film was developed to be used as a supporter for determining the photocatalytic oxidation activity of the TiO2 on the chlorinated volatile organic compounds degradation. PBS is a synthetic biopolymer which has a reasonable mechanical strength. The modified-TiO2/PBS bio-composite films were studied to evaluate the degradation of dichloromethane. In order to improve the distribution of the developed photocatalyst, the TiO2 powders were modified by 0.05% mole of ethyl triethoxysilane (ETES) and stearic acid (SA), respectively. The 10% wt. TiO2/PBS bio-composite films with thickness of 30 μm were prepared by blown film technique. To evaluate the dispersion efficacy, the modified-TiO2/PBS bio-composite films were characterized by Scanning Electron microscopy (SEM). Photocatalytic degradation of dichloromethane in gas phase was determined using an annular closed system photoreactor. The obtained result which was corresponding to the absorption of TiO2/PBS bio composites film was investigated in a range of 300-400 nm via UV/VIS spectrophotometry. The energy band gap of TiO2, ethyl triethoxysilane-TiO2 and stearic acid-TiO2 bio-composite film was found to be 3.18, 3.21, and 3.26 eV, respectively. The SEM shows that the modified-TiO2 with both ETES and SA exhibit uniform dispersion, while the only TiO2 shows an evidence of agglomeration in the PBS matrix. For photocatalyst efficiency, the photocatalytic activity of modified-TiO2/PBS bio-composite film increased comparing to the TiO2/PBS bio-composite film. Moreover, the photocatalytic degradation of dichloromethane by ETES-TiO2/PBS bio-composite film yielded degradation efficiency of 47.0%, whereas SA-TiO2/PBS bio-composite film yielded the removal efficiency of 41.0% for detention time at 350 min.
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Ibrahim, Ismail, Azlin Fazlina Osman, Sinar Arzuria Adnan, Lai Di Sheng, and Nazrul Haq. "Effects of hectorite loading on tear properties and biodegradability of thermoplastic starch films." Journal of Physics: Conference Series 2080, no. 1 (2021): 012031. http://dx.doi.org/10.1088/1742-6596/2080/1/012031.
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Abstract Development of bio-based polymers can reduce human dependence on fossil fuel and move to a sustainable material resource. In this work, thermoplastics starch (TPS) films were produced by plasticization process, in which the crystalline structure of the starch granules was destroyed and reformed by water and glycerine through mechanical stirring and heating process. Hectorite was employed as filler to reinforce the TPS films. The hectorite was subjected to ultrasonication process for reducing the size and aggregation of particles. The ultrasonicated hectorite was added into the TPS solution to produce the TPS/hectorite bio-composite by film casting method. The TPS films with hectorite loading in the range of 1% to 5% were prepared. The morphology, tear strength and soil biodegradability of the TPS/hectorite bio-composite films were studied by altering the loading of hectorite incorporated into the TPS films. Results showed that the TPS/hectorite bio-composite films have higher tear strength compared to the pure TPS films. The tear strength of the bio-composite films slightly increased with hectorite content 1% and 2%. However, as the filler loading increased to 3%, there was a drastic increase of the tear strength. The maximum tear strength value was achieved by the TPS film when 4% hectorite filler was employed. The TPS/4% hectorite (ultrasonicated) has the lowest rate of soil biodegradation due to its lower moisture uptake and greatest interface interaction between starch and hectorite, inhibiting diffusion of bacteria into the films.
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Kalemtas, Ayse, Hasan B. Kocer, Ahmet Aydin, Pinar Terzioglu, and Gulsum Aydin. "Mechanical and antibacterial properties of ZnO/chitosan bio-composite films." Journal of Polymer Engineering 42, no. 1 (2021): 35–47. http://dx.doi.org/10.1515/polyeng-2021-0143.
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Abstract In the current study, ZnO/chitosan bio-composite films were produced via solution-casting method. Two different ZnO powders, micrometer (d50 ≅ 1.5 μm) and nanometer sized (d50 ≅ 100 nm), were used to investigate the effect of ZnO particle size and concentration (0, 2, and 8% w/w of chitosan) on the mechanical and antibacterial properties of the ZnO/chitosan bio-composite films. The incorporation of the ZnO powders into the chitosan film resulted in an increase in the tensile strength (TS) and a decrease in the elongation at break (EB) values. Mechanical test results revealed that TS and EB properties were considerably affected (p < 0.05) by the concentration and particle size of the ZnO reinforcement. Disc diffusion method demonstrated good antibacterial activities of bio-composite films containing high amount of ZnO (8% w/w of chitosan) against Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, and Bacillus subtilis. The growth-limiting effect of the films was more pronounced for S. aureus and K. pneumoniae. Due to enhanced TS and imparted antibacterial activity of the produced ZnO/chitosan bio-composite films, these materials are promising candidates for applications such as food packaging, wound dressing, and antibacterial coatings for various surfaces.
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M’sakni, Nour Houda, and Taghreed Alsufyani. "Part B: Improvement of the Optical Properties of Cellulose Nanocrystals Reinforced Thermoplastic Starch Bio-Composite Films by Ex Situ Incorporation of Green Silver Nanoparticles from Chaetomorpha linum." Polymers 15, no. 9 (2023): 2148. http://dx.doi.org/10.3390/polym15092148.
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The study was used in the context of realigning novel low-cost materials for their better and improved optical properties. Emphasis was placed on the bio-nanocomposite approach for producing cellulose/starch/silver nanoparticle films. These polymeric films were produced using the solution casting technique followed by the thermal evaporation process. The structural model of the bio-composite films (CS:CL-CNC7:3–50%) was developed from our previous study. Subsequently, in order to improve the optical properties of bio-composite films, bio-nanocomposites were prepared by incorporating silver nanoparticles (AgNPs) ex situ at various concentrations (5–50% w/w). Characterization was conducted using UV-Visible (UV-Vis), Fourier Transform Infrared (FTIR), Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM) to understand the structure–property relationships. The FTIR analysis indicated a reduction in the number of waves associated with the OH functional groups by adding AgNPs due to the formation of new hydrogen bonds between the bio-composite matrix and the CL-WE-AgNPs. Based on mathematical equations, the optical bandgap energy, the energy of Urbach, the edge of absorption (Ed), and the carbon clusters (N) were estimated for CS:CL-CNC and CS:CL-CNC-AgNPs (5–50%) nanocomposite films. Furthermore, the optical bandgap values were shifted to the lower photon energy from 3.12 to 2.58 eV by increasing the AgNPs content, which indicates the semi-conductor effect on the composite system. The decrease in Urbach’s energy is the result of a decrease in the disorder of the biopolymer matrix and/or attributed to an increase in crystalline size. In addition, the cluster carbon number increased from 121.56 to 177.75, respectively, from bio-composite to bio-nanocomposite with 50% AgNPs. This is due to the presence of a strong H-binding interaction between the bio-composite matrix and the AgNPs molecules. The results revealed that the incorporation of 20% AgNPs into the CS:CL-CNC7:3–50% bio-composite film could be the best candidate composition for all optical properties. It can be used for potential applications in the area of food packaging as well as successfully on opto-electronic devices.
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Nordin, N. M., H. Anuar, F. Ali, and Y. F. Buys. "Tensile properties of PolyLactic Acid Composite Foamed via Supercritical Carbon Dioxide." Journal of Physics: Conference Series 2129, no. 1 (2021): 012007. http://dx.doi.org/10.1088/1742-6596/2129/1/012007.
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Abstract Tensile properties of foamed PolyLactic Acid (PLA) composite were studied. In this work, PLA were incorporate with Durian Skin Fibre (DSF) and Cinnamon Essential Oil (CEO) to form PLA bio composite and further treat via supercritical carbon dioxide (SCCO2) to form foamed PLA bio composite. The tensile strength value of foamed PLA bio composite slightly drops from foamed PLA. As for stress strain graph, the percentage of strain for foamed PLA and PLA bio composite did not distinct much. Through SEM, the foamed PLA bio composite showing that it did not fully foamed after treated via SCCO2 which due to treatment period and the thickness of the thin films.
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Akay Sefer, Ozge. "Characterization of Luffa-reinforced Polyaniline Films." Düzce Üniversitesi Bilim ve Teknoloji Dergisi 13, no. 1 (2025): 26–36. https://doi.org/10.29130/dubited.1469198.
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Herein, Polyaniline (PANI)/polyethylene oxide (PEO) - luffa cylindrica bio-composite films of various mass fractions (%) have been prepared via casting solution of emeraldine base polyaniline and cellulose extracted from luffa. The biopolymer films were structurally and thermally characterized using X-ray diffraction (XRD), Fournier Transform-InfraRed (FT-IR) spectroscopy, and differential scanning calorimetry analysis (DSC). Moreover, the electrical properties of conductive biopolymer solutions were measured by using the conductivity meter. According to the obtained results, treated luffa increases the conductivity of biopolymers. XRD results reveal that luffa increases the crystallinity of bio-composite films in comparison to PANI/PEO films. FTIR analysis proved the presence of functional groups of PANI, PEO, and luffa in the film structure. Also, an increase in the weight of luffa in the bio-composite film brings about an increase in the peak intensities of the O-H group. It is determined that luffa enhances the thermal stability of composites via the results of DSC analysis.
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Cai, Zengxiao, Abu Naser Md Ahsanul Haque, Renuka Dhandapani, and Maryam Naebe. "Sustainable Cotton Gin Waste/Polycaprolactone Bio-Plastic with Adjustable Biodegradation Rate: Scale-Up Production through Compression Moulding." Polymers 15, no. 9 (2023): 1992. http://dx.doi.org/10.3390/polym15091992.
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Cotton gin trash (CGT), a lignocellulosic waste generated during cotton fibre processing, has recently received significant attention for production of composite bio-plastics. However, earlier studies were limited to either with biodegradable polymers, through small-scale solution-casting method, or using industrially adaptable extrusion route, but with non-biodegradable polymers. In this study, a scale-up production of completely biodegradable CGT composite plastic film with adjustable biodegradation rate is proposed. First using a twin screw extruder, the prepared CGT powder was combined with polycaprolactone (PCL) to form pellets, and then using the compressing moulding, the pellets were transformed into bio-plastic composite films. Hydrophilic polyethylene glycol (PEG) was used as a plasticiser in the mixture and its impact on the biodegradation rate was analysed. The morphology of CGT bio-plastic composite films showed even distribution of CGT powder within the PCL matrix. The CGT incorporation improved the UV resistance, thermal stability, and Young’s modulus of PCL material. Further, the flexibility and mixing properties of the composites were improved by PEG. Overall, this study demonstrated a sustainable production method of CGT bio-plastic films using the whole CGT and without any waste residue produced, where the degradation of the produced composite films can be adjusted to minimise the environmental impact.
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Patrucco, A., A. Aluigi, C. Vineis, and C. Tonin. "Bio-Composite Keratin Films from Wool Fibrillation." Journal of Biobased Materials and Bioenergy 5, no. 1 (2011): 124–31. http://dx.doi.org/10.1166/jbmb.2011.1118.
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Ab Rahman, Muhammad Asyraf Aiman, Sharifah Fathiyah Sy Mohamad, and Shahril Mohamad. "Development and Characterization of Bio-Composite Films Made from Bacterial Cellulose Derived from Oil Palm Frond Juice Fermentation, Chitosan and Glycerol." Trends in Sciences 20, no. 8 (2023): 4919. http://dx.doi.org/10.48048/tis.2023.4919.
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This study reported for the first time, the combined effects of chitosan and glycerol addition on the properties of bacterial cellulose (BC) based films for food packaging applications. Films were prepared by solution casting method using BC derived from oil palm frond juice as the main material combined with different concentrations of chitosan (0.5 and 1 %w/v) and glycerol (0.5, 1.5 and 2.5 %v/v). Pure BC, chitosan-free and glycerol-free films were used as control. The effect of incorporating chitosan and glycerol on bacterial cellulose (BC) based films was evaluated based on the physical properties (thickness, moisture content, solubility), mechanical properties (tensile strength, modulus Young, elongation at break) and chemical structure by FTIR. Increased concentration of chitosan and glycerol affected the physical and mechanical properties. The combination of 1 %w/v chitosan and 0.5 %v/v glycerol had a strengthening effect on the BC-based films with maximum tensile strength of 15 MPa and Young’s modulus of 772 MPa. Meanwhile, BC films incorporated with 1 %w/v chitosan and 2.5 %v/v glycerol demonstrated high plasticizing effect of 7 % elongation at break. The acquired FTIR spectrum of the bio-composite films suggested intermolecular interactions between BC, chitosan, and glycerol. Therefore, the BC-based bio-composite films incorporated with chitosan and glycerol have the potential to be used as food packaging materials. HIGHLIGHTS Bio-composite films from bacterial cellulose derived from oil palm frond juice fermentation with different proportions of chitosan (0.5 and 1 % w/v) and glycerol (0.5, 1.5 and 2.5 % v/v) were developed using casting method Chitosan and glycerol contents have great influences on thickness, moisture content, water solubility and mechanical properties of the films The bio-composite films have potential application as food packaging material GRAPHICAL ABSTRACT
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Nevo, Y., N. Peer, S. Yochelis, et al. "Nano bio optically tunable composite nanocrystalline cellulose films." RSC Advances 5, no. 10 (2015): 7713–19. http://dx.doi.org/10.1039/c4ra11840e.
Der volle Inhalt der QuelleDissertationen zum Thema "Bio-composite films"
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Mujica, Randy. "Layer-by-Layer assembly of nanocellulose composite films with bio-inspired helicoidal superstructures." Thesis, Strasbourg, 2020. http://www.theses.fr/2020STRAE011.
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Les propriétés optiques et mécaniques remarquables des matériaux naturels sont souvent associées à la complexité de leurs structures hiérarchiques. L’une des plus complexes est la structure hélicoïdale, constituée de plusieurs couches de fibres alignées dont l’orientation tourne entre les couches voisines. Cette microstructure, dite de Bouligand, est associée à la résistance aux chocs accrue de la carapace de certains crustacés ainsi qu’à la réflexion préférentielle de la lumière polarisée circulaire de certains fruits et insectes. Dans ce travail, nous avons fabriqué des films minces bio-inspirés complexes composés de nanofibrilles de cellulose et de poly(vinylamine) en utilisant l'approche couche-par-couche (LbL) et la pulvérisation à incidence rasante (GIS), une méthode permettant de contrôler l'alignement dans le plan de nano-objets anisotropes comme les nanofibrilles de cellulose. Nous avons démontré la possibilité de contrôler de façon indépendante la direction de l'alignement de chaque couche de cellulose. Ainsi, nous avons pu préparer des films minces avec une orientation unidirectionnelle, croisée ou hélicoïdale des nanofibrilles de cellulose, ce qu’il n’est pas possible de faire avec d’autres procédés de fabrication. Les propriétés optiques de ces films ont été caractérisées par dichroïsme circulaire et ellipsométrie spectroscopique à matrice de Mueller. Nous avons observé que la réponse chirale des films hélicoïdaux est contrôlée par le sens de rotation, le pas de l’hélice et le nombre de couches avant rotation. Les propriétés mécaniques de ces films ont été étudiées par différentes méthodes de nanoindentation. La méthodologie de fatigue par nano-contact a montré une ductilité accrue des films unidirectionnels et hélicoïdaux, qui peut être indirectement liée à une absorption accrue de l'énergie de ce matériau lors des sollicitations en raison de sa structure interne<br>The remarkable optical and mechanical properties of natural materials are often associated with the complexity of their hierarchical structures. One of the most complexes is the helical structure which consists of several layers of unidirectionally aligned fibers whose orientation rotates with respect to their neighboring layers. This so-called Bouligand microstructure is responsible for the enhanced impact resistance of the shell of some crustaceans as well as the preferential reflection of circularly polarized light of certain fruits and insects. Here, we fabricated complex bio-inspired thin films made of cellulose nanofibrils and poly(vinylamine) using the layer-by-layer (LbL) approach and grazing incidence spraying (GIS), a method allowing to control the in-plane alignment of anisotropic nano-objects like cellulose nanofibrils. We demonstrated the independent direction of alignment of each cellulose layer, which allowed the preparation of thin films with well-defined internal structures, namely, unidirectional, cross-ply or helical arrangement of the reinforcing nanofibrils, which is impossible to achieve by any other fabrication process. The optical properties of these films were characterized by circular dichroism (CD) and by Mueller matrix ellipsometry. The chirality observed for helicoidal films is controlled by the rotation direction, the pitch, and the number of layers. The mechanical properties of these cellulose-based films were studied by various nanoindentation methods. A nano-contact fatigue methodology showed an increased ductility of the unidirectional and helicoidal films, which can be indirectly related to enhanced absorption of energy of this material owing to their internal structure
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Syed, Samira. "The Development Of Bio-Composite Films From Orange Waste : A Methodological And Evaluation Study Of Material Properties." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-25523.
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Bioplastic research has become more diverse and different types of research on bioplastic production have been conducted from fruits and vegetable waste, for example, orange waste. The wastes that come from oranges contain more than just vitamins, it has soluble sugars, starch, hemicellulose, cellulose, and pectin. The intention of this project was to study the possibility to produce bio-composite films from orange waste, after removing the soluble sugars. It was also to analyze the properties of the material by tensile strength, visual observation, and to find a methodology that suits this study. An ultrafine grinder was used to mechanically separate the cellulose fibres, with the intention to compare the fibrillation cycles on the properties of the bio-composite films. A total of 30fibrillation cycle was performed. In addition, different film casting strategies were performed and evaluated. The primary plan was to produce a biofilm without the use of chemicals. After the observing the results three new routes for the methodology was developed where the usage of chemicals was be included. The citric acid was used as a solvent for pectin and glycerol was used as a plasticizer. In the first method, different concentration of citric acid and glycerol were added and observed. The combination which gave uniformed films that contained 0.3 g of citric and 0.375 g of glycerol for a 75 ml hydrogel. The second method was to infuse citric acid before grinding the orange waste suspension. Lastly, the third method was to bleach the orange waste before grinding. The films that were produced gave interesting results and from the tensile testing implied that an impact was made on the strength by every fibrillation. The amount of glycerol was consistent throughout the project, but by adding different amount of citric acid gave the films differentIIproperties. The same happened when changing the mould of the film. The best values of the films were from the 30th fibrillation, gave the mean value of 31.6 MPa in tensile strength, and had a strain in elongation at 6.1 %. The tensile strength and elongation had increased drastically compared the fifth fibrillation which had 9.8 MPa and 7.6%.
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Shao, Yu-Han, and 邵郁涵. "Application of Combinational Antibacterial Effect of Chitosan and Natamycin on Storage of Bio-Cellulose Composite Films." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/36281100903818685001.
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碩士<br>國立宜蘭大學<br>食品科學系碩士班<br>103<br>The bacteria and mold can be observed on wet fabricated bio-film (WFBF) contaning high moisture content during long-term storage at room temperature. But treatment with single antibacterial substance with narrow targets usually requires high-dose and can be a problem. Therefore, this study investigated the combinational antibacterial effect of natural antibacterial and antifungal substances, chitosan (Chi) and natamycin (NAT), against Aspergillus niger, Staphylococcus aureus, Escheriachia coli and Pseudomona aeruginosa. In addition, the WFBF made of bacterial cellulose (BC) was immersed in combinational antibacterial solution to simulate the storage conditions of wet masks in market, and the synergistic effect was investigated. According to the 96-well microplate and inhibition zone tests, the minimum inhibitory concentration (MIC) of NAT against A. niger was 375 µg/mL, but ineffective against S. aureus, E. coli and P. aeruginosa. The MIC of Chi against S. aureus, E. coli and P. aeruginosa were 3,200 µg/mL, 6.25 µg/mL and 100 µg/mL, respectively, but ineffective against A. niger. The Chi/NAT under 200/188 µg/mL combinational ratio exhibited effective inhibition against A. niger, which reduced the dosage of antimicrobial substances and showed synergistic effect. For inhibition of S. aureus, high-dose of Chi was required during storage. The Chi/NAT dosage at 1,600/47 µg/mL inhibited the growth of S. aureus and E. coli within 168 hrs. Moreover, this dosage of Chi/NAT effectively inhibited the growth of A. niger for at less 21 days and exhibited synergistic effect. However, such dosage of Chi/NAT (1,600/188 µg/mL) could not effectively inhibit the growth of P. aeruginosa. In physical properties, there was no difference in the mechanical properties of WFBF within 24 hr storage, but water vapor transmission rate decreased. The WFBF was softened as prolonged the storage. These results indicated the combinational antibacterial effect of Chi and NAT can lower the dosage of antibacterial substances, and possesses the potential for substituting chemical preservatives to extend shelf life.
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WU, BING-HAN, and 吳秉翰. "The Test of Mechanical Properties and Simulation of PLA Bio-degradable Composite Film." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/50253615051080865919.
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碩士<br>南臺科技大學<br>機械工程系<br>104<br>The mechanical properties the bio-composite films which use the PLA (Poly lactic Acid) as the basic materials were studied by using static mechanics test, finite element simulation software in this work. The DIC optically image analysis was using to analyze the pictures which taken during the test to make sure that the films were extend average without any crooked to increase the accuracy of data. In the part of static mechanics test, the tensile testing machine and self-made clamps were used to conduct the ramp-told test of 8 kinds of PLA films which has different kinds of ingredients and content of additives, and calculate the average value and standard deviation by analyze the force, stress and strain according to the test data to make a preliminary comparison for different kinds of PLA films. Then, the finite element simulation software was used to make the simulation to compare with the reality test data. After the test, the relationship between ingredient and mechanical properties of inorganic silicon films is similar to the situation we estimated first, but it has the biggest force at the slowest speed. It can only surmised that the inorganic silicon films may will be hardening gradually after the test. The organic silicon films showed the best mechanical properties at 0.5% of ingredient of silicon. It can be confirmed that the organic silicon films won't produce the similar situation with inorganic silicon films by observed the relationship between ingredient and mechanical properties of organic silicon films. At the part of fitting, the error between the actual data and simulated data was getting bigger as time goes on. It can be confirmed that is related to the broken of films during the test. In the micrograph of films, there are many tiny cracks can be observed. As the result, it can say that the second half of the test may be affected because of the cracks which were getting bigger or extra generated cracks during the test.
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Tawakkal, ISMA. "Characterisation and antimocrobial activity of poly(lacitc acid)/kenaf bio-composites containing a natural agent." Thesis, 2016. https://vuir.vu.edu.au/32304/.
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The use of materials based on poly(lactic acid) (PLA) as alternatives to petroleum-based
polymers for a range of applications has increased in recent years. In the case of food packaging
in particular, PLA has experienced growth in combination with the use of a wide range of other
materials and/or additives derived from natural and renewable resources. However, the initial
costs associated with new technologies to produce PLA and/or other bio-based polymers are
typically high, so new techniques are required to reduce costs without compromising material
properties and biodegradability. Naturally sourced lignocellulose fibres such as kenaf
(Hibiscus cannabinus L.) are often used as cost-reducing fillers and/or reinforcing agent for
biopolymers such as PLA. This study explores the characteristics and antimicrobial (AM) activity of PLA and PLA/kenaf
composites incorporated with thymol, a natural bio-active AM substance/agent. The production
of PLA/kenaf composites containing thymol is intended for potential use in AM packaging
applications such as rigid and/or flexible packaging and coatings. Composites of PLA
incorporated with 5 to 40% w/w kenaf fibre loadings and thymol concentrations ranging from
5 to 30% w/w were prepared and compared with control systems containing either no kenaf or
no thymol. Kenaf fibres can be treated by alkalisation to improve compatibility with polymer
matrices. It was found that the PLA/kenaf composites containing treated kenaf possessed
significantly higher tensile strength and stiffness than composites prepared with untreated
kenaf. Micrograph images of the fracture surface revealed better adhesion between the treated
kenaf fibres and the matrix, thereby resulting in improved reinforcement of the composite.
Moreover, PLA/kenaf composites containing thymol exhibited lower tensile strength than
those without thymol, suggesting a possible plasticizing effect in the presence of the additive.
Buchteile zum Thema "Bio-composite films"
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Kusmono, Dody Ariawan, and Labib Alif Ichsanuddin. "Tensile and Light Transmittance Properties of Polyvinyl Alcohol/Cellulose Nanocrystals/Glycerol Bio-composite Films." In Springer Proceedings in Materials. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-2015-0_23.
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Cakmak, Hulya, and Ece Sogut. "Functional Biobased Composite Polymers for Food Packaging Applications." In Reactive and Functional Polymers Volume One. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43403-8_6.
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AbstractBiobased polymers are of great interest due to the release of tension on non-renewable petroleum-based polymers for environmental concerns. However, biobased polymers usually have poor mechanical and barrier properties when used as the main component of coatings and films, but they can be improved by adding nanoscale reinforcing agents (nanoparticles - NPs or fillers), thus forming nanocomposites. The nano-sized components have a larger surface area that favors the filler-matrix interactions and the resulting material yield. For example, natural fibers from renewable plants could be used to improve the mechanical strength of the biobased composites. In addition to the mechanical properties, the optical, thermal and barrier properties are mainly effective on the selection of type or the ratio of biobased components. Biobased nanocomposites are one of the best alternatives to conventional polymer composites due to their low density, transparency, better surface properties and biodegradability, even with low filler contents. In addition, these biomaterials are also incorporated into composite films as nano-sized bio-fillers for the reinforcement or as carriers of some bioactive compounds. Therefore, nanostructures may provide antimicrobial properties, oxygen scavenging ability, enzyme immobilization or act as a temperature or oxygen sensor. The promising result of biobased functional polymer nanocomposites is shelf life extension of foods, and continuous improvements will face the future challenges. This chapter will focus on biobased materials used in nanocomposite polymers with their functional properties for food packaging applications.
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Shrimal, Pankaj Kumar, Sangeeta Garg, and ArdhenduSekhar Giri. "Synthesis of Biodegradable Composite Films from Polyvinyl Alcohol (PVA)/Amla Leaf Fibre (ALF) for Packaging Application." In Advances in Chemical, Bio and Environmental Engineering. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-96554-9_41.
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Sucinda, E. F., M. S. Abdul Majid, M. J. M. Ridzuan, and E. M. Cheng. "Polylactic Acid (PLA) Bio-Composite Film Reinforced with Nanocrystalline Cellulose from Napier Fibers." In Lecture Notes in Mechanical Engineering. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-0866-7_87.
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Varshini, S., C. Kanishkar Raja, P. Kavitha, R. Menaka, and M. R. Ezhilarasi. "PREPARATION AND CHARACTERISATION OF PVA BASED COMPOSITE FILM AND EVALUATION OF ITS ANTI MICROBIAL ACTIVITY." In Futuristic Trends in Chemical Material Sciences & Nano Technology Volume 3 Book 11. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3becs11p2ch6.
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This chapter reports the determination of eco-friendly, bio degradable polymer composite film by amalgamation of an edible, water soluble polysaccharide named as Carrageenan and based on PVA (polyvinyl alcohol). Polymers are macromolecules with long repeating chains of monomers made by the process of polymerization. Polymers possess multi-functionality and better film-forming capabilities, which could significantly improve protective barrier properties. Natural polymers are one among the major classes of polymers based on their origin. This class includes proteins, cellulose, poly peptides, and silk so on. They have certain advantages over the other classes of polymers because of their easy availability, potential-to bio-degrade, economic viability and their biocompatibility. Natural polymers are abundant and renewable. The biological properties like antibacterial anti-inflammatory and antioxidant efficacy of polymer based dressing can be enhanced by incorporating plant extract. PVA is a semi crystalline synthetic polymer. It can be fabricated into various forms like films and coatings which possess high tensile strength and flexibility. It is a promising biomaterial with high degree of swelling, bio degradability, non-toxicity, adhesiveness, bio inertness etc. Finally, after the composite film is developed, we characterize using FTIR and the solubility of synthesised composite film in different solvents is studied and its Antimicrobial activity is evolved.
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Nabok, A. V., A. K. Ray, A. K. Hassan, and N. F. Starodub. "Composite Polyelectrolyte Self-Assembled Films for Chemical and Bio-Sensing." In Studies in Interface Science. Elsevier, 2001. http://dx.doi.org/10.1016/s1383-7303(01)80033-8.
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Halimatul, M. J., S. M. Sapuan, N. Julkapli, M. Jawaid, M. R. Ishak, and Mohammad Taha Mastura. "Starch Cellulosic Bio-Composites." In Advances in Environmental Engineering and Green Technologies. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1374-3.ch002.
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This review discusses the effect of nanocellulose or lignocellulosic fibers introduced in starch films. A concise comparison in the mechanical and water absorption properties of the nanocellulose-reinforced starch originated from different plant species was made. It was found that most of these studies prefer solution casting as popular fabrication technique. Studies found nanocellulose generates positive results on mechanical and water uptake properties. The increment in tensile strength was reported between 1.08 to slightly higher than 2-fold while water uptake was decreased between 1.14 to 1.19-fold. In addition, the fibers also serves well as a reinforcement material for starch matric although not as competent as nanocellulose. Discussion on improvement in mechanical, water uptake, thermal, and biodegradation of lignocellulosic fiber-reinforced starch was presented in this chapter. This review also emphasizes potential uses of nanocellulose reinforced starch composite as a smart food packaging and bio-carrier in bio-delivery system where it contributes considerably to a better life.
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Radotić, Ksenija, Dragica Spasojević, and Danica Zmejkoski. "Lignin-based Materials for Biomedical Applications: Basic Requirements and Properties." In Lignin-based Materials. The Royal Society of Chemistry, 2023. http://dx.doi.org/10.1039/bk9781839167843-00085.
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The material selected for biomedical application must be biocompatible, stable against physiological media, non-toxic, non-carcinogenic, corrosion-resistant, bio-inert, and stimuli-responsive, and have a low wear rate. Lignin is the most abundant aromatic polymer on Earth with a complex, recalcitrant structure. A lot of knowledge is acquired on its pre-treatments and processing for biomedical uses in the forms of hydrogels, films, composite materials, nanoparticles, and aerogels. To avoid the potential toxicity and to control the cytotoxicity of lignin-based materials, it is necessary to increase the purity of the starting source materials and understand their reactivity. The poor water solubility, broad molecular weight (MW) distribution, and highly complex structure of lignin restrict its wider clinical applications. These limitations may be effectively improved by chemical modifications or by using lignin fractions with a narrow MW range. Antioxidant and antimicrobial properties allow lignin to be used in pharmaceuticals, drug delivery, and wound healing. It is also reported as a good candidate for composite materials intended for bone regeneration scaffolds in tissue engineering. Future challenges for lignin-based materials for biomedical applications include achieving a better understanding of the structure, isolation, and batch properties of lignin, as well as structure–function relationships in its applications.
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Kumar Verma, Amit. "Collagen-Based Biomaterial as Drug Delivery Module." In Collagen Biomaterials [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.103063.
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In the field of medicine, controlled drug delivery has become a major challenge due to inefficiency of drug at critical parameters such as permeability, solubility, half-life, targeting ability, bio- & hemocompatibility, immunogenicity, off-target toxicity and biodegradability. Since several decades the role of drug delivery module has been a crucial parameter of research and clinical observations to improve the effectiveness of drugs. Biomaterials- natural or artificial are mainly used for medical application such as in therapeutics or in diagnostics. Among all the biomaterials, collagen based-hydrogels/ films/ composite materials have attracted the research and innovations and are the excellent objects for drug delivery, tissue engineering, wound dressings and gene therapeutics etc. due to high encapsulating capacity, mechanically strong swollen structural network and efficient mass transfer properties. Substantial developments have been performed using collagen-based drug delivery systems (DDS) to deliver biomolecules with better efficacy. In spite of significant progress, several issues at clinical trials particularly targeting of intracellular molecules such as genes is still a challenge for researchers. Experimental results, theoretical models, molecular simulations will boost the fabrication/designing of collage-based DDS, which further will enhance the understanding of controlled delivery/mechanism of therapeutics at specific targets for various disease treatments.
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Lakhane, Madhuri, and Megha Mahabole. "Biocompatible Composites and Applications." In Bio-Inspired Nanotechnology. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815080179123010004.
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In this chapter, the low-cost, biodegradable absorbents are developed for wastewater treatment. At first, the modification of the procured nano ZSM-5 is executed by means of dealumination and ion exchange process to have de-laminated (D-ZSM-5), Cu-ZSM-5 and Fe-ZSM-5. Furthermore, cellulose nanofibrils (CNFs) are mixed with modified zeolites with varying concentrations (20 and 80 wt%) used for the fabrication of innovative composite films ((D-ZSM-5, Cu-ZSM-5 and Fe-ZSM-5). FTIR, XRD, BETCO2, TGA, and SEM type of characterization techniques are used for the analysis of composites. The prepared composite films are exploited for cationic Rhodamine B (Rh6B) and anionic Reactive Blue 4 (RB4) dye elimination by the activity of adsorption. The effect of contact time, initial dye concentration and pH on the dyes’ adsorption in aqueous buffer solutions is examined. The equilibrium adsorption data are estimated using Langmuir, Freundlich, and Temkin isotherm models. Langmuir isotherm is deemed to be the best-fitting model and the process (kinetics and mechanism) follows pseudo-second-order kinetics, yielding an uppermost adsorption capacity of 34 mg/g, and 16.55 mg/g which is comparable to plane CNF (8.7mg/g) and (0.243mg/g) for cationic Rh6B dye and anionic RB4 dye respectively. Maximum dye removal is observed for a higher amount of (80% ZSM-5) film. The study reveals that ZSM-5/ CNFs films can potentially be used for the removal of cationic and anionic dyes.
Konferenzberichte zum Thema "Bio-composite films"
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Chanda, Anupama, Nabajyoti Rajkonwar, Khalid Bin Masood, Jai Singh, and Prashant Shukla. "Study of bio-polymer derived graphene oxide-ZnO nano-composite thin films." In 3RD INTERNATIONAL CONFERENCE ON CONDENSED MATTER AND APPLIED PHYSICS (ICC-2019). AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0001315.
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Mallick, Nirlipta, Dharm Pal, and A. B. Soni. "Corn-starch/polyvinyl alcohol bio-composite film for food packaging application." In SECOND INTERNATIONAL CONFERENCE ON MATERIAL SCIENCE, SMART STRUCTURES AND APPLICATIONS: ICMSS-2019. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5141429.
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