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Artykuły w czasopismach na temat "Carbon-based fillers"
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Krause, Beate, Piotr Rzeczkowski i Petra Pötschke. "Thermal Conductivity and Electrical Resistivity of Melt-Mixed Polypropylene Composites Containing Mixtures of Carbon-Based Fillers". Polymers 11, nr 6 (21.06.2019): 1073. http://dx.doi.org/10.3390/polym11061073.
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Melt-mixed composites based on polypropylene (PP) with various carbon-based fillers were investigated with regard to their thermal conductivity and electrical resistivity. The composites were filled with up to three fillers by selecting combinations of graphite nanoplatelets (GNP), carbon fibers (CF), carbon nanotubes (CNT), carbon black (CB), and graphite (G) at a constant filler content of 7.5 vol%. The thermal conductivity of PP (0.26 W/(m·K)) improved most using graphite nanoplatelets, whereas electrical resistivity was the lowest when using multiwalled CNT. Synergistic effects could be observed for different filler combinations. The PP composite, which contains a mixture of GNP, CNT, and highly structured CB, simultaneously had high thermal conductivity (0.5 W/(m·K)) and the lowest electrical volume resistivity (4 Ohm·cm).
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Srivastava, Suneel, i Yogendra Mishra. "Nanocarbon Reinforced Rubber Nanocomposites: Detailed Insights about Mechanical, Dynamical Mechanical Properties, Payne, and Mullin Effects". Nanomaterials 8, nr 11 (16.11.2018): 945. http://dx.doi.org/10.3390/nano8110945.
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The reinforcing ability of the fillers results in significant improvements in properties of polymer matrix at extremely low filler loadings as compared to conventional fillers. In view of this, the present review article describes the different methods used in preparation of different rubber nanocomposites reinforced with nanodimensional individual carbonaceous fillers, such as graphene, expanded graphite, single walled carbon nanotubes, multiwalled carbon nanotubes and graphite oxide, graphene oxide, and hybrid fillers consisting combination of individual fillers. This is followed by review of mechanical properties (tensile strength, elongation at break, Young modulus, and fracture toughness) and dynamic mechanical properties (glass transition temperature, crystallization temperature, melting point) of these rubber nanocomposites. Finally, Payne and Mullin effects have also been reviewed in rubber filled with different carbon based nanofillers.
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Tonkov, D. N., M. I. Kobylyatskaya, E. S. Vasilyeva, A. V. Semencha i V. E. Gasumyants. "Conductive properties of flexible polymer composites with different carbon-based fillers". Journal of Physics: Conference Series 2227, nr 1 (1.03.2022): 012022. http://dx.doi.org/10.1088/1742-6596/2227/1/012022.
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Abstract This paper is devoted to the comparative study of conductive properties of three types of flexible polymer composites consisting of styrene-butadiene rubber (SBR) as a matrix and graphite, graphene or single-walled carbon nanotubes as fillers. The dependences of the resistivity on the mass fraction of different fillers are measured and analyzed within the framework of the statistical percolation theory. The percolation parameters (the values of the percolation threshold and the critical exponent) are calculated for all studied composites. Their variation depending on the filler type is discussed, taking into account a geometric shape of filler particles and the nature of the conduction process in composites in the percolation range. The sensitivity of the resistivity of synthesized composites to axial deformation at different mass fraction of fillers is also investigated. Using graphite or graphene fillers is observed to result in a higher sensitivity compared to the carbon nanotubes filler. The highest value of the gauge factor is observed when using 23 mass.% graphene filler that indicates graphene/SBR composites to be most promising for creating strain sensors.
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Kim, Jin Bong, Sang Kwan Lee i Chun Gon Kim. "Comparison of Carbon-Based Nano Materials as Conductive Fillers for Single Layer Microwave Absorber". Key Engineering Materials 334-335 (marzec 2007): 837–40. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.837.
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In this paper, we have studied the permittivities of E-glass fabric/epoxy composite laminates containing three different types of carbon-based nano conductive fillers such as carbon black (CB), carbon nano fiber (CNF) and multi-wall carbon nano tube (MWNT). The measurements were performed for permittivities at the frequency band of 0.5 GHz ~ 18.0 GHz using a vector network analyzer with a 7 mm coaxial air line. The experimental results show that the complex permittivities of the composites depend strongly on the natures and concentrations of the conductive fillers. The real and imaginary parts of the complex permittivities of the composites were proportional to the filler concentrations. But, depending on the types of fillers and frequency band, the increasing rates of the real and imaginary parts with respect to the filler concentrations were all different. At the frequency of 10 GHz, the rates in the CNF filled composite and the MWNT filled composite were much larger then those of the CB filled composite. Between the CNF filled composite and MWNT filled composite, however, the former showed a little higher increasing rates than the other. These different rates can have great effect on the thickness in designing the single layer microwave absorbers. The effect of the different rates was examined by using Cole-Cole plots; the plot is composed of a single layer absorber solution line and permittivity lines of these three types of composites.
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Sattayanurak, S., J. W. M. Noordermeer, K. Sahakaro, W. Kaewsakul, W. K. Dierkes i A. Blume. "Silica-Reinforced Natural Rubber: Synergistic Effects by Addition of Small Amounts of Secondary Fillers to Silica-Reinforced Natural Rubber Tire Tread Compounds". Advances in Materials Science and Engineering 2019 (3.02.2019): 1–8. http://dx.doi.org/10.1155/2019/5891051.
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Modern fuel-saving tire treads are commonly reinforced by silica due to the fact that this leads to lower rolling resistance and higher wet grip compared to carbon black-filled alternatives. The introduction of secondary fillers into the silica-reinforced tread compounds, often named hybrid fillers, may have the potential to improve tire performance further. In the present work, two secondary fillers organoclay nanofiller and N134 carbon black were added to silica-based natural rubber compounds at a proportion of silica/secondary filler of 45/10 phr. The compounds were prepared with variable mixing temperatures based on the mixing procedure commonly in use for silica-filled NR systems. The results of Mooney viscosity, Payne effect, cure behavior, and mechanical properties imply that the silica hydrophobation and coupling reaction of the silane coupling agent with silica and elastomer are significantly influenced by organoclay due to an effect of its modifier: an organic ammonium derivative. This has an effect on scorch safety and cure rate. The compounds where carbon black was added as a secondary filler do not show this behavior. They give inferior filler dispersion compared to the pure silica-filled compound, attributed to an inappropriate high mixing temperature and the high specific surface area of the carbon black used. The dynamic properties indicate that there is a potential to improve wet traction and rolling resistance of a tire tread when using organoclay as secondary filler, while the combination of carbon black in silica-filled NR does not change these properties.
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KIM, YESEUL, SE YOUN CHO, YOUNG SOO YUN i HYOUNG-JOON JIN. "ELECTROCONDUCTIVE ADHESIVES BASED ON POLYURETHANE WITH MULTIWALLED CARBON NANOTUBES". Modern Physics Letters B 23, nr 31n32 (30.12.2009): 3739–45. http://dx.doi.org/10.1142/s0217984909021776.
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In the present study, we prepared and characterized electrically conductive adhesives based on polyurethane filled with two kinds of multiwalled carbon nanotubes (MWCNTs), viz. pristine MWCNTs and acid treated MWCNTs, respectively. The influence of the type of filler on the dispersibility within the polyurethane matrix and the corresponding electrical conductivity is investigated. The electrical conductivity of the prepared specimens was measured using a four-point probe. The morphology and dispersibility of the fillers were observed by field emission scanning electron microscopy and transmission electron microscopy.
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Wu, Jia Wei, Rong Rong Qi, Xin Yu Ji, Ping Kai Jiang, Xiang Yang Wu, Xin Wei Wang i Ping Wang. "Thermally Conductive Polypropylene/Graphite/Carbon Fiber Composites". Materials Science Forum 893 (marzec 2017): 12–20. http://dx.doi.org/10.4028/www.scientific.net/msf.893.12.
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The combination of different carbon-based fillers (commercial plate graphite (GR) and rod carbon fiber (CF)) were added as conductive fillers to improve the thermal conductivity of polypropylene (PP). The effect of different ratio of carbon-based fillers on the thermal and mechanical properties of GR/CF/PP composites was investigated in detail. A remarkable synergistic effect between GR and CF in improving thermal conductivity of PP composites has been achieved. The results show that the in-plane thermal conductivity rises to 2.8 W·(m·k)-1 at a GR/CF ratio of 5:1 (the total mass fraction of carbon-based fillers to 40wt%), which is 14 times as the thermal conductivity of pure PP (0.2 W·(m·k)-1) and also much higher than that of single filler composites.
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Kruželák, Ján, Andrea Kvasničáková, Klaudia Hložeková, Roderik Plavec, Rastislav Dosoudil, Marek Gořalík, Jarmila Vilčáková i Ivan Hudec. "Mechanical, Thermal, Electrical Characteristics and EMI Absorption Shielding Effectiveness of Rubber Composites Based on Ferrite and Carbon Fillers". Polymers 13, nr 17 (31.08.2021): 2937. http://dx.doi.org/10.3390/polym13172937.
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In this work, rubber composites were fabricated by incorporation of manganese-zinc ferrite alone and in combination with carbon-based fillers into acrylonitrile-butadiene rubber. Electromagnetic parameters and electromagnetic interference (EMI) absorption shielding effectiveness of composite materials were examined in the frequency range 1 MHz–3 GHz. The influence of ferrite and fillers combination on thermal characteristics and mechanical properties of composites was investigated as well. The results revealed that ferrite imparts absorption shielding efficiency to the composites in tested frequency range. The absorption shielding effectiveness and absorption maxima of ferrite filled composites shifted to lower frequencies with increasing content of magnetic filler. The combination of carbon black and ferrite also resulted in the fabrication of efficient EMI shields. However, the EMI absorption shielding effectiveness was lower, which can be ascribed to higher electrical conductivity and higher permittivity of those materials. The highest conductivity and permittivity of composites filled with combination of carbon nanotubes and ferrite was responsible for the lowest absorption shielding effectiveness within the examined frequency range. The results also demonstrated that combination of ferrite with carbon-based fillers resulted in the enhancement of thermal conductivity and improvement of mechanical properties.
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Bokobza, Liliane. "ELASTOMERIC COMPOSITES BASED ON NANOSPHERICAL PARTICLES AND CARBON NANOTUBES: A COMPARATIVE STUDY". Rubber Chemistry and Technology 86, nr 3 (1.09.2013): 423–48. http://dx.doi.org/10.5254/rct.13.86983.
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ABSTRACT The reinforcement of elastomeric materials by addition of mineral fillers represents one of the most important aspects in the field of rubber science and technology. The improvement in mechanical properties arises from hydrodynamic effects depending mainly on the amount of filler and the aspect ratio of the particles and also on polymer–filler interactions depending on the surface characteristics of the filler particles and the chemical nature of the polymer. The past few years have seen the extensive use of nanometer-scale particles of different morphologies on account of the small size of the filler and the corresponding increase in the surface area that allow a considerable increase in mechanical properties even at very low filler loading. Among these nanoparticles, spherical particles (such as silica or titania) generated in situ by the sol-gel process and carbon nanotubes are typical examples of materials used as a nanosize reinforcing additive. Specific features of filled elastomers are discussed through the existing literature and through results of the author's research based on poly(dimethylsiloxane) filled with spherical silica or titania particles and on styrene–butadiene rubber filled with multiwall carbon nanotubes. The reinforcing ability of each type of filler is discussed in terms of morphology, state of dispersion (investigated by transmission electron microscopy, atomic force microscopy, small-angle neutron scattering), and mechanical and electrical properties. In addition, the use of molecular spectroscopies provides valuable information on the polymer–filler interface. Spherical silica and titania spherical particles are shown to exhibit two distinct morphologies, two different polymer–filler interfaces that influence the mechanical properties of the resulting materials. The superiority of carbon nanotubes over carbon black for mechanical reinforcement and electrical conduction is mainly attributed to their large aspect ratio rather than to strong polymer–filler interactions. The use of hybrid fillers (carbon nanotubes in addition to carbon black or silica, for example) has been shown to give promising results by promoting an enhancement of mechanical and electrical properties with regard to each single filler.
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Chiu, Fang-Chyou, Kartik Behera, He-Jie Cai i Yen-Hsiang Chang. "Polycarbonate/Poly(vinylidene fluoride)-Blend-Based Nanocomposites—Effect of Adding Different Carbon Nanofillers/Organoclay". Polymers 13, nr 16 (6.08.2021): 2626. http://dx.doi.org/10.3390/polym13162626.
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Carbon black (CB), carbon nanotubes (CNTs), and graphene nanoplatelets (GnPs) individually or doubly served as reinforcing fillers in polycarbonate (PC)/poly(vinylidene fluoride) (PVDF)-blend (designated CF)-based nanocomposites. Additionally, organo-montmorillonite (15A) was incorporated simultaneously with the individual carbon fillers to form hybrid filler nanocomposites. Microscopic images confirmed the selective localization of carbon fillers, mainly in the continuous PC phase, while 15A located in the PVDF domains. Differential scanning calorimetry results showed that blending PVDF with PC or forming single/double carbon filler composites resulted in lower PVDF crystallization temperature during cooling. However, PVDF crystallization was promoted by the inclusion of 15A, and the growth of β-form crystals was induced. The rigidity of the CF blend increased after the formation of nanocomposites. Among the three individually added carbon fillers, GnPs improved the CF moduli the most; the simultaneous loading of CNT/GnP resulted in the highest moduli by up to 33%/46% increases in tensile/flexural moduli, respectively, compared with those of the CF blend. Rheological viscosity results showed that adding CNTs increased the complex viscosity of the blend to a greater extent than did adding CB or GnPs, and the viscosity further increased after adding 15A. The electrical resistivity of the blend decreased with the inclusion of carbon fillers, particularly with CNT loading.
Rozprawy doktorskie na temat "Carbon-based fillers"
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STRONGONE, VALENTINA. "Preparation and characterization of UV-LED curable composite systems based on carbon fillers". Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2875751.
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Xu, Han. "Melt flow singularity in linear polyethylene : influence of molar mass, molar mass distribution and carbon-based fillers". Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/7018.
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In the recent past it has been found that a considerable pressure drop occurred during the extrusion of linear polyethylene in the course of capillary flow. The pressure drop resides within a narrow temperature window of one to two degrees Celsius. In this research the hydrodynamic condition and molecular origin of the extrusion window of linear polymer were investigated further. The advantage of the extrusion window, viz. smooth extrudate with less die swell ratio attained at low extrusion pressure and temperature, has potential in industrial applications. However, the extrusion window, corresponding to linear polyethylene (PE) with relatively low polydispersity (<7), has a narrow window temperature interval, circa 1~2°C, thus it could not be applied to industrial scale processing at the industrial scale. To have a fundamental insight and make the process industrially viable, research in this thesis was devoted to broaden the extrusion window to tolerate the thermal fluctuations in conventional processing. To achieve this goal molecular weight dependence of window temperature and flow criticalities is revealed. The hydrodynamic conditions of the extrusion window observed in a rate-controlled rheometer and stick-slip flow studied in a stress-controlled rheometer could be traced back to the same origin, viz. slip flow arises due to the disentanglement of adsorbed chains on capillary wall from free chains in the bulk. Secondly, a dual window effect was uncovered in the course of capillary flow of a bimodal PE, which is consistent with the window temperature dependence on molecular weight. Moreover, it was found that flow induced orientation within the window effect is even less than that observed in steady state flow at a relatively low shear rate. This implies that in the window region only relaxed free chains are extruded through the capillary die and most of the adsorbed chains, which could be disengaged from the entangled melt, remain sticking to the inner capillary wall. This observation is consistent with the hydrodynamic origin of high-surface-energy-die slip flow. Finally, a unimodal linear PE with extremely broad molecular weight distribution, i.e. polydispersity (PDI) is 27, showed a broad window effect, circa 8°C, at an appropriate apparent shear rate. The molecular origin of such a broad window effect is due to its broad molecular weight distribution. These results have further implications for energy efficient processing.
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BELLI, ALBERTO. "Comparison between Commercial and Recycled Carbon-Based Fillers and Fibers for the Development of Smart and Sustainable Multifunctional Mortars". Doctoral thesis, Università Politecnica delle Marche, 2019. http://hdl.handle.net/11566/263335.
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La società moderna è in gran parte fondata sulle infrastrutture che garantiscono la fornitura di beni, trasporti e mezzi di comunicazione. La loro salvaguardia e il risparmio delle risorse necessarie per il loro funzionamento è di crescente importanza per l’Ingegneria civile. Per questo motivo, la ricerca sui materiali da costruzione si sta concentrando sul riutilizzo di sottoprodotti industriali riciclati, per un’industria edilizia più sostenibile. L’Ingegneria dei materiali, grazie al recente sviluppo di nanomateriali ad alte prestazioni, propone molteplici spunti per la realizzazione di materiali strutturali multifunzionali.
La presente ricerca mira a sviluppare compositi multifunzionali a base di leganti idraulici, con l'aggiunta di filler e fibre a base di carbonio di origine riciclata, ottenuti da sottoprodotti industriali. Sono stati studiati i miglioramenti in termini di resistenze meccaniche e di durabilità, nonché le loro proprietà disinquinanti e fotocatalitiche. Le proprietà elettriche delle miscele sono state studiate, per la valutazione delle capacità di schermatura delle interferenze elettromagnetiche delle aggiunte, e come base di studio per lo sviluppo di materiali auto-sensibili per il monitoraggio strutturale.
Sono state realizzate paste e malte contenenti grafene o altri filler a base di carbonio di origine riciclata (da 0.25 a 4% sul peso del legante) e fibre di carbonio (da 0.05 a 1.6% sul volume della miscela).
Sui composti sono stati eseguiti test di resistenza meccanica e durabilità, nonché test di adsorbimento degli inquinanti, di fotocatalitisi e di resistività elettrica. La sensibilità elettrica alla deformazione è stata valutata misurando la variazione percentuale della resistività su provini soggetti a carichi di compressione semi-statici.
I risultati mostrano che l’aggiunta di filler a base di carbonio riciclati porta a un raffinamento della microstruttura della matrice e a un incremento delle resistenze meccaniche, nonché a un decremento della permeabilità all’acqua. L’aggiunta di micro-fibre di carbonio riciclate porta a un incremento delle resistenze meccaniche a flessione, e a un notevole aumento della conducibilità elettrica (di svariati ordini di grandezza, rispetto ai tradizionali materiali cementizi).Today's society is largely based on infrastructures that guarantee goods, transport and communication networks. Their safeguarding and saving of resources for their operation is becoming increasingly important in the field of building engineering. For this reason, research on building materials is increasingly focused on the re-use of recycled industrial by-products, for a more sustainable construction industry. Materials engineering, thanks to the development of high performance nanomaterials, offers several ideas for the construction of multifunctional building materials. The present research aims to develop multifunctional hydraulic binder-based composite with the addition of recycled carbon-based fillers and fibers obtained from industrial by-products. The enhancement of mechanical strength and durability of the composites have been studied, together with their de-polluting and photocatalytic properties. The electrical properties of the mixtures have been studied to analyze the Electromagnetic interference shielding capability of carbon-based admixtures, and to provide a basis for the development of strain-sensing materials for structural health monitoring. Pastes and mortars containing graphene or other commercial and recycled carbon-based fillers (from 0.25 to 4.0% on binder weight) and fibers (from 0.05 to 1.6% by mixture volume) were realized. Tests of mechanical resistance and durability were performed on the mixtures, together with test of pollutants adsorption, photocatalysis and electrical resistivity. Strain-sensitivity has been evaluated by measuring the fractional change in resistivity of the specimens subjected to quasi-static compressive loads. Results show that the addition of recycled carbon-based fillers leads to a refinement of the matrix microstructure, increasing the mechanical strength and decreasing the water permeability. The addition of recycled carbon micro-fibers leads to an increase in flexural strengths and to a noticeable increase in electrical conductivity (up to several orders of magnitude compared to the traditional cementitious materials).
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Xu, Huagen [Verfasser], Dirk [Akademischer Betreuer] Schubert i Dirk [Gutachter] Schubert. "Electrical Conductivity of Binary PMMA/carbon-based filler and Ternary Poly(alkyl methacrylate)/PS/carbon-based filler composite films / Huagen Xu ; Gutachter: Dirk Schubert ; Betreuer: Dirk Schubert". Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2020. http://d-nb.info/1222267993/34.
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Bryan, Nicholas James. "PEBAX-based mixed matrix membranes for post-combustion carbon capture". Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31239.
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Polymeric membranes exhibit a trade-off between permeability and selectivity in gas separations which limits their viability as an economically feasible post-combustion carbon capture technology. One approach to improve the separation properties of polymeric membranes is the inclusion of particulate materials into the polymer matrix to create what are known as mixed matrix membranes (MMMs). By combining the polymer and particulate phases, beneficial properties of both can be seen in the resulting composite material. One of the most notable challenges in producing mixed matrix membranes is in the formation of performance-hindering defects at the polymer-filler interface. Non-selective voids or polymer chain rigidification are but two non-desirable effects which can be observed. The material selection and synthesis route are key to minimising these defects. Thin membranes are also highly desirable to achieve greater gas fluxes and improved economical separation processes. Hence smaller nano-sized particles are of particular interest to minimise the disruption to the polymer matrix. This is a challenge due to the tendency of some small particles to form agglomerations. This work involved introducing novel nanoscale filler particles into PEBAX MH1657, a commercially available block-copolymer consisting of poly(ethylene oxide) and nylon 6 chains. Poly(ether-b-amide) materials possess an inherently high selectivity for the CO2/N2 separation due to polar groups in the PEO chain but suffer from low permeabilities. Mixed matrix membranes were fabricated with PEBAX MH1657 primarily using two filler particles, nanoscale ZIF-8 and novel nanoscale MCM-41 hollow spheres. This work primarily investigated the effects of the filler loading on both the morphology and gas transport properties of the composite materials. The internal structure of the membranes was examined using scanning electron microscopy (SEM), and the gas transport properties determined using a bespoke time-lag gas permeation apparatus. ZIF-8 is a zeolitic imidazolate framework which possesses small pore windows that may favour CO2 transport over that of N2. ZIF-8-PEBAX membranes were successfully synthesised up to 7wt.%. It was found that for filler loadings below 5wt.%, the ZIF-8 was well dispersed within the polymer phase. At these loadings modest increases in the CO2 permeability coeffcient of 0-20% compared to neat PEBAX were observed. Above this 5wt.% loading large increases in both CO2, N2 and He permeability coeffcients coincided with the presence of large micron size clusters formed of hundreds of filler ZIF-8 particles. The increases in permeability were attributed to voids observed within the clusters. MCM-41 is a metal organic framework that has seen notable interest in the field of carbon capture, due to its tunable pore size and ease of functionalisation. Two types of novel MCM-41 hollow sphere (MCM-41-HS) of varying pore size were incorporated into PEBAX and successfully used to fabricate MMMs up to 10wt.%. SEM showed the MCM-41 generally interacted well with the polymer with no signs of voids and was generally well dispersed. However, some samples of intermediate loading in both cases showed highly asymmetric distribution of nanoparticles and high particle density regions near one external face of the membrane which also showed the highest CO2 permeability coeffcients. It is suspected that these high permeabilities are due to the close proximity of nanoparticles permitting these regions to act in a similar way to percolating networks. It was determined that there was no observable effect of the varying pore size which was expected given the transport in the pores should be governed by Knudsen diffusion.
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Chuang, Yu-Ping, i 莊鈺坪. "Impact of Carbon Fillers with Different Structure on Electrothermal Properties of Electrothermal Film based on Fabric Substrate". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/75759389271167258853.
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碩士逢甲大學
紡織工程所
94
Due to the conventional resistance wire has the disadvantages of high energy consumption and high voltage demand. In this study, the electrothermal film based on fabric is made of different carbon conduct fillers and epoxy resin. The supply voltage is 30 volt (V) that is considered to be a safety voltage. This is contribute to a low energy consumption. In this study, the different carbon fillers was added to the epoxy resin to form a paste. Then, the paste was either printed with half-tone screen or dipped and padded with press roller onto a nonwoven fabric. The relationship between the surface resistance and the impact factor, such as filler quantity, diameter, shape and structure of filler, were studies. In addition, the effect of supply voltage on the temperature of electrothermal film was also referred. The results show that the surface resistance is decreased with the increment of filler quantity, then it descents smoothly beyond the threshold value of percolation. In the processing of dipping and padding, the filming of paste is independent of fabric substrate. The temperature test reveals that the surface temperature is increased with the increment of supply voltage. On the contrary, it is increased with the descent of surface resistance. The optimal condition for a lowest energy consumption at 40℃ is also discussed in this study.
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Sung, Pei-Ni, i 宋沛霓. "Stretchable elastomers as efficient dispersant for large amounts of carbon-based fillers to prepare highly-conductive composites". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/cfrr43.
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碩士國立中山大學
材料與光電科學學系研究所
107
Development of electric sensors from polymers/carbon conductors have drawn increasing research attention and with this prospect, we prepared stretchable and healable random copolymers M1 and M2, from radical polymerization of methyl methacrylate (MMA), methacrylic acid (MAA) and oligo(ethylene glycol) methyl ether methacrylate (OEGMA) monomers, for homogeneously blending large amounts (up to equivalent weight) of MWCNTs for the preparation of healable and stretchable conductive nanocomposite sensors with keen responses toward minute, medium and large strain deformations. With the reversible hydrogen bond (H bond) interactions between the inherent pendant groups, random copolymers are healable and highly-stretchable (with fracture strain ef up to 2446%) and after being mixing with different amounts of MWCNTx, the resulting composite films are highly conductive (with conductivity up to 2.06 x 103 S m-1) and are healable and stretchable (ef up to 1890 %). The suitability of the composite films as electric sensor for stain deformations was evaluated and discussed in this study.
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Shetty, Hitha D. "Dielectric, Mechanical, Magnetic and Electromagnetic Shielding properties of Carbon nanomaterial embedded Polydimethylsiloxane composites". Thesis, 2018. https://etd.iisc.ac.in/handle/2005/4631.
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Composites are the advanced engineering materials invented by men with exceptional properties over traditional materials. These attractive and delightful materials are the result of developments in the area of engineering and materials science. Composites are heterogeneous materials, obtained by combining two or more components known as matrix and fillers. The matrix may be metallic, ceramic or polymeric in nature. It decides the shape, surface quality, environmental tolerance and durability of the composite while the filler, change or improve the mechanical and physical properties of matrix. Hence, the composites are wonderful materials with a combination of most desirable properties of matrix and filler, suppressing their unwanted properties. Since the last few decades, developments in the field of nanotechnology has been inspired by the discovery of various carbon structures in nanoscale. The era of carbon nanostructures started and gathered massive attention from researchers, with the finding of fullerene in 1985 and has continued till today. Outstanding work by Andre Geim and Konstantin Novoselov on carbon flake of just 1-atom thickness or graphene fetching them the Nobel prize in the year 2010, opened another new chapter in the history of carbon nanostructures. Even a small variation in the orbital or macroscopic structures of carbon, can give rise to variety of new and fascinating properties. Thus, carbon nanomaterials such as carbon nanotubes, graphene, bucky balls, carbon nanofibers and many more are the supreme filler materials in the growth of nanotechnology. The area of research based on carbon nanomaterials is extraordinary, motivated by exceptional and ground-breaking findings evolving both science and technology. This has encouraged the birth of research journals dedicated to research findings exclusively in the field of carbon nanotechnology. The study of composites with these superior filler materials over the last decade, have given birth to polymer nanocomposites with enhanced electrical, thermal and mechanical properties in addition to lower density and ease of processability. Here we are reporting about polymer composites with polydimethylsiloxane (PDMS) as matrix which has distinctive properties such as optical transparency, flexibility, biocompatibility and ease of moulding. PDMS composites with carbon nanostructures make them ideal candidates for various applications. In this thesis, dielectric, electrical, mechanical and electromagnetic shielding properties of various PDMS-carbon nanostructure composites are compared and discussed to understand the effect of macroscopic structural forms of carbon on PDMS.
The thesis is divided into eight chapters to put forward the understanding of PDMS composites with variety of carbon-based fillers from different aspects.
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-jung-Tsat, Pei, i 蔡佩容. "Impact of Carbon Fillers with Different Structure on the Electrothermal Property of Electrothermal Film based on Glass Substrate". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/50986557583789753039.
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碩士逢甲大學
紡織工程所
94
Due to the conventional resistance wire has the disadvantages of high energy consumption and high voltage demount, a new generation material--electrothermal film was developed in this study to improve the above-mentioned demerits. In this study, the electrothermal film is made of carbon black, graphic anode and the carbon fiber which were used as filler to mix with epoxy resin. The impact of parameters, such as added ratio of filler, process, diameter and shape of carbon black, length of carbon fiber, on the electrothermal film are also discussed in this study. Finally, after connecting with electrodes on both sides, the temperature profile on the film’s surface under various voltage and time are observed. The results show that the above-mentioned factors play an important roll on the surface resistance before the critical value of Percolation. The material has a significant influence on the surface resistance when it above the critical value of Percolation. In addition, the least energy consumption is only 1.75 W at the temperature of 100 ℃; furthermore, considering the safety in usage, the supply voltage can be low down to 16.5 V, which is quite below the Safety Voltage. It is proved that the electrothermal film has a significant improvements in energy consumption and safety.
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"Study Thermal Property of Stereolithography 3D Printed Multiwalled Carbon Nanotubes Filled Polymer Nanocomposite". Master's thesis, 2020. http://hdl.handle.net/2286/R.I.62966.
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abstract: Traditionally, for applications that require heat transfer (e.g. heat exchangers),metals have been the go-to material for manufacturers because of their high thermal as
well as structural properties. However, metals have some notable drawbacks. They are
not corrosion-resistant, offer no freedom of design, have a high cost of production, and
sourcing the material itself. Even though polymers on their own don’t show great
prospects in the field of thermal applications, their composites perform better than their
counterparts. Nanofillers, when added to a polymer matrix not only increase their
structural strength but also their thermal performance. This work aims to tackle two of
those problems by using the additive manufacturing method, stereolithography to solve
the problem of design freedom, and the use of polymer nanocomposite material for
corrosion-resistance and increase their overall thermal performance. In this work, three
different concentrations of polymer composite materials were studied: 0.25 wt%, 0.5
wt%, and 1wt% for their thermal conductivity. The samples were prepared by
magnetically stirring them for a period of 10 to 24 hours depending on their
concentrations and then sonicating in an ice bath further for a period of 2 to 3 hours.
These samples were then tested for their thermal conductivities using a Hot Disk TPS
2500S. Scanning Electron Microscope (SEM) to study the dispersion of the nanoparticles
in the matrix. Different theoretical models were studied and used to compare
experimental data to the predicted values of effective thermal conductivity. An increase
of 7.9 % in thermal conductivity of the composite material was recorded for just 1 wt%
addition of multiwalled carbon nanotubes (MWCNTs).Dissertation/Thesis
Masters Thesis Mechanical Engineering 2020
Książki na temat "Carbon-based fillers"
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Fleming, James R. Historical Perspectives on Climate Change. Oxford University Press, 1998. http://dx.doi.org/10.1093/oso/9780195078701.001.0001.
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This intriguing volume provides a thorough examination of the historical roots of global climate change as a field of inquiry, from the Enlightenment to the late twentieth century. Based on primary and archival sources, the book is filled with interesting perspectives on what people have understood, experienced, and feared about the climate and its changes in the past. Chapters explore climate and culture in Enlightenment thought; climate debates in early America; the development of international networks of observation; the scientific transformation of climate discourse; and early contributions to understanding terrestrial temperature changes, infrared radiation, and the carbon dioxide theory of climate. But perhaps most important, this book shows what a study of the past has to offer the interdisciplinary investigation of current environmental problems.
Części książek na temat "Carbon-based fillers"
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Kim, Jin Bong, Sang Kwan Lee i Chun Gon Kim. "Comparison of Carbon-Based Nano Materials as Conductive Fillers for Single Layer Microwave Absorber". W Advances in Composite Materials and Structures, 837–40. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-427-8.837.
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Mishra, Arunesh K., Pratibha Mishra, Anil K. Bahe, Atish Roy, Megha Das i Ratnesh Das. "Polymer–Carbon Nanotubes-Based Composite for Removal of Pollutants in Wastewater". W Polymer-Carbonaceous Filler Based Composites for Wastewater Treatment, 103–13. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003328094-6.
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dos Santos, T. C., P. A. Carísio, A. P. S. Martins, M. D. M. Paiva, F. M. P. Gomes, O. A. M. Reales i R. D. Toledo Filho. "Effect of Fine Aggregates and Test Settings on the Self-sensing Response of Cement-Based Composites with Carbon Nanotubes as Conductive Filler". W Lecture Notes in Civil Engineering, 197–211. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_21.
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AbstractCement-based self-sensing composites with carbon nanotubes (CNT) have attracted attention due to their multifunctional properties and great potential for their application in the smart monitoring of concrete structures. In this study, the self-sensing properties of one paste and three mortars containing 0.50 and 0.75 wt% of CNT, and 1.5 and 1.0 sand/cement ratio were investigated, aiming to evaluate their impact on the piezoresistive response of the composites. The inclusion of sand in the cement paste with CNT led to a reduced gauge factor and a higher electrical noise response. The inert aggregates modified the compressive loading mechanical response of the composites and possibly acted as barriers to electronic mobility, by increasing the CNT conductive paths’ tortuosity or even interrupting them. The mortar containing 0.50% of CNT showed a higher electrical resistivity and, at the same time, greater sensitivity and a more linear self-sensing response than the one with 0.75% CNT, which can be explained by the CNT content being closer to its percolation threshold in the first. In this way, a lower CNT concentration generated a conductive network with a higher capacity to be rearranged under loading, generating significant changes in resistivity, but a higher CNT concentration presented a more stable and conductive network. The results suggested that both the conductive and non-conductive phases affect the detection performance of the composites and, therefore, must be dosed appropriately. Additionally, the test setup modifications positively affected the self-sensing response signal, which is particularly useful to reduce the deleterious effects of the sand additions in the matrix. This overall approach can make the use of self-sensing mortars in structural monitoring a viable option.
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Le Gal, M., Y. Marco, V. Le Saux, N. Allanic, R. Deterre, G. Freyd i P. Charrier. "Influence of curing temperature and pressure on the fatigue properties of carbon-black filled natural rubber: An analysis based on the sulfur network". W Constitutive Models for Rubber XII, 342–48. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003310266-56.
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Bartoli, Mattia, Mauro Giorcelli, Pravin Jagdale i Massimo Rovere. "Towards Traditional Carbon Fillers: Biochar-Based Reinforced Plastic". W Fillers [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.91962.
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Prusty, Kalyani, i Sarat K. Swain. "Microscopic Analysis and Characterization of Natural Rubber Containing Carbon Fillers". W Carbon-Based Nanofillers and Their Rubber Nanocomposites, 225–51. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-817342-8.00008-1.
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V. Kornev, Yury, Hammat H. Valiev, Yuliya N. Karnet, Alla A. Kornilova, Nikolay A. Semenov i Alexander N. Vlasov. "Composition and Structure Influence on Properties of Elastomeric Composites with Silicon Dioxide Fillers". W Rubber Materials [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108515.
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The problem of finding effective polymer elastomer fillers now is actual task. This chapter presents experimental studies of composites based on industrial synthetic butadiene-styrene rubber with amorphous silicon dioxide filler particles, obtained from rice husk ash processing products. The new methodology was developed for producing highly dispersed fillers powders with micro- and nano-sizes using a planetary ball mill. The synthesized composites surface structure was investigated using scanning electron and atomic force microscopy. The composites elastic-strength properties were studied by tensile testing machine. The significant influence of the surface functionality and the carbon/silicon dioxide ratio in fillers on the elastomeric composites mechanical properties is shown. It is concluded that these new classes of reinforcing fillers can be recommended for practical use.
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Wei, Junhua. "Mechanically Improved and Multifunctional CFRP Enabled by Resins with High Concentrations Epoxy-Functionalized Fluorographene Fillers". W Fiber-Reinforced Plastic [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.100141.
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To meet the maximum potential of the mechanical properties of carbon fiber reinforced plastics (CFRP), stress transfer between the carbon fibers through the polymer matrix must be improved. A recent promising approach reportedly used reinforcing particles as fillers dispersed in the resin. Carbon based fillers are an excellent candidate for such reinforcing particles due to their intrinsically high mechanical properties, structure and chemical nature similar to carbon fiber and high aspect ratio. They have shown great potential in increasing the strength, elastic modulus and other mechanical properties of interest of CFRPs. However, a percolation threshold of ~1% of the carbon-based particle concentration in the base resin has generally been reported, beyond which the mechanical properties deteriorate due to particle agglomeration. As a result, the potential for further increase of the mechanical properties of CFRPs with carbon-based fillers is limited. We report a significant increase in the strength and elastic modulus of CFRPs, achieved with a novel reinforced thermoset resin that contains high loadings of epoxy-reacted fluorographene (ERFG) fillers. We found that the improvement in mechanical performance of CFRPs was correlated with increase in ERFG loading in the resin. Using a novel thermoset resin containing 10 wt% ERFG filler, CFRPs fabricated by wet layup technique with twill weaves showed a 19.6% and 17.7% increase in the elastic modulus and tensile strength respectively. In addition, because of graphene’s high thermal conductivity and high aspect ratio, the novel resin enhanced CFRPs possessed 59.3% higher through-plane thermal conductivity and an 81-fold reduction in the hydrogen permeability. The results of this study demonstrate that high loadings of functionalized particles dispersed in the resin is a viable path towards fabrication of improved, high-performance CFRP parts and systems.
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Gupta, Tejendra K., Rajeev Kumar, Manjeet Singh Goyat i Deepshikha Gupta. "Carbon Nanostructures-based Polymer Nanocomposites for EMI Shielding Applications". W Smart Materials Design for Electromagnetic Interference Shielding Applications, 109–52. BENTHAM SCIENCE PUBLISHERS, 2022. http://dx.doi.org/10.2174/9789815036428122010006.
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We have seen a rapid surge in the growth and subsequent drive-in scaling down electronic interfaces with intelligent electronic devices. Any electronic gadget that transmits, distributes, or uses electrical energy produces electromagnetic interference (EMI), which has harmful effects on device performance, human health, and the surrounding environment. This increase in unrestricted EM pollution can also affect human well-being and the surrounding environment if proper shielding is not provided. Therefore, there is an increasing demand for EMI shielding materials due to the rapid increase in EM radiation sources. EMI shielding materials must have the capability to absorb and reflect EM radiation at very high frequencies and act as a shield against the penetration of radiation through them. The polymer matrices are generally electrically insulating; therefore, they cannot provide shielding against EM radiations. Thus, the use of electrically conducting fillers enables the path in polymer composites to shield the EM radiations. This chapter covers the up‐to‐date research activities targeting EMI shielding based on thermoplastic, and thermoset polymer nanocomposites (PNCs) reinforced with carbon-based nanostructures (CBNS). The first section of this chapter gives a brief overview of the fundamentals of EMI shielding, theoretical aspects of shielding, and different strategies for controlling EM radiations. Other synthesis methods are discussed in the next section, which deals with the preparation of PNCs. Comprehensive justification of potential materials for controlling EMI is also described with nanocomposites based on thermoplastic and thermoset polymer matrices incorporated within CBNS, magnetic, dielectric, and hybrid materials. The synergistic effects of the hybrid fillers may render tunable electrical conductivity and electrical percolation phenomenon in nanocomposites.
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Madkour, Loutfy. "Corrosion Resistance Potential of Metal-Matrix Composites Reinforced With Carbon Nanofibers and Carbon Nanotubes". W Handbook of Research on Corrosion Sciences and Engineering, 135–88. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-7689-5.ch006.
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Carbon nanotubes are attractive and promising fillers due to their chemical inertness and high mechanical, electrical, and thermal properties. From the conjugation of carbon nanotubes with inorganic hybrid, it is expected to obtain nanocomposite coatings that combine high anti-corrosion efficiency with improved mechanical stability. This book chapter presents a concise review of microstructure and corrosion behaviour of different nanotube composite coatings. In the first section, the authors briefly explain the science behind the corrosion and corrosion resistance of nanotube composite coatings, followed by a selection of current state and recent advances on promoted nanotube composite coating: Al, Cu, Mg, Fe, Ni, Mg–Zn, Mg–Al, NiCo, and ZnCo-carbon nanotube composite and based matrix composites coatings. Recent development of graphene reinforced metal matrix nanocomposites has been studied. Challenges needed to be rectified before the synthesis of metal-matrix nanocomposites. Finally, the authors discuss the relevant topics, highlighting recent progress and unresolved questions.
Streszczenia konferencji na temat "Carbon-based fillers"
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"Self-Sensing Mortars with Recycled Carbon-Based Fillers and Fibers". W SP-355: Recent Advances in Concrete Technology and Sustainability Issues. American Concrete Institute, 2022. http://dx.doi.org/10.14359/51736018.
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Baránek, Šimon, Lenka Mészárosová, Rostislav Drochytka i Grigory Ivanovich Yakovlev. "Study of Microstructure of Electrically Conductive Silicate Composites with Graphite-Based Fillers". W INTERNATIONAL CONFERENCE ON REHABILITATION AND RECONSTRUCTION OF BUILDINGS 2021. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/p-4kq682.
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Electrical conductive composite materials are nowadays widely used in many industrial applications include building materials. One of the possible applications is as a resistance probe. Those probes were designed to monitor internal structural changes of building materials built into construction and to predict their durability, over-load, or defects. Mostly used composite materials are silicate or biopolymer-based with carbon-based filler. This article is dedicated to the study of the microstructure of silicate-based electrically conductive composites with graphite-based fillers. The microstructural shape of fillers was chosen concerning preserving as high conductivity as possible. Furthermore, the effect of moisture on the electrically conductive properties of the silicate composite was monitored.
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Abdalqader, A., Mohammed Sonebi, Neil Thornton i Su Taylor. "Assessment of the Influence of the Type of Filler Materials on the Properties of Cement Grouts". W 4th International Conference on Bio-Based Building Materials. Switzerland: Trans Tech Publications Ltd, 2022. http://dx.doi.org/10.4028/www.scientific.net/cta.1.171.
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Cement grouts have many purposes in various civil engineering applications such as precast construction, soil stabilization and structural rehabilitation. Using filler materials as a component in cement grouts has been increasingly implemented. The incorporation of such fillers not only does improve the fresh and hardened properties of grouts but also contributes to the decarbonization of grouts by reducing the amount of Portland cement, thereby lowering the carbon footprint of grouting materials. This study aims at assessing the influence of various filler materials on the properties of cement grouts. Three different fillers were used in this study: commercial limestone, commercial pure dolomite, dolomitic quarry dust. These fillers were assessed in terms of their effect on the spread, flowability, cohesion and compressive strength at 3, 7 and 28 days. The results show that fresh properties of the grout were dependent on the type of fillers. Dolomitic quarry dust improved the workability and flowability more than the commercial limestone and dolomite did. The compressive strengths of cement grouts did not change significantly with the incorporation of the fillers. However, cement grout samples including quarry dust exhibited slightly higher 28-d compressive strength than other samples although the same mix had lower 1-d compressive strength than other mixes. This study highlights the benefits of utilizing quarry dust in cement-based binders without compromising the performance.
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Zhou, X., E. Shin, K. W. Wang i C. E. Bakis. "Damping Characteristics of Carbon Nanotube Based Composites". W ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/vib-48537.
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Because of their ultra small, nanometer scale size and low density, the surface area to mass ratio (specific area) of carbon nanotubes (CNTs) is extremely large. Therefore, in a nanotube-based polymeric composite structure, it is anticipated that high damping can be achieved by taking advantage of the interfacial friction between the nanotubes and the polymer resins. In addition, the CNT’s large aspect ratio and high elastic modulus features allow for the design of such composites with large differences in strain between the constituents, which could further enhance the interfacial energy dissipation ability. Despite their wonderful engineering potential, the damping properties of CNT-based composites have not been examined in any detail. The purpose of this paper is to investigate the structural damping characteristics of polymeric composites distributed with single-walled carbon nanotubes (SWNTs). In this study, the system is modeled using a four-phase composite, composed of a resin, voids, and bonded and debonded nanotubes. A micromechanical model is proposed to describe interfacial debonding evolution. To characterize the overall behavior, the Weibull’s statistical function is employed to describe the varying probability of nanotube debonding under uniaxial loading. Fictitious, perfectly bonded inclusions are used to replace debonded nanotubes such that the elastic mechanical properties can be obtained through Eshelby’s approach. To address damping effects, the concept of interfacial “stick-slip” frictional motion between the nanotubes and the resin is proposed. A critical shear (bonding) stress is used to separate the material system into an energy-conservative range due to strong interfacial bonding, and a nanotube sliding range resulting in energy dissipation. The developed method is further extended to analyze composites with randomly oriented nanotubes. The analytical results show that the critical shear stress, nanotube weight ratio and structure deformation are the factors affecting the damping characteristic. Experimental efforts are also performed to verify the trends predicted by the analysis. Through comparing with neat resin specimens, the study shows that one can indeed enhance damping by adding CNT fillers into polymeric resins. It is also observed that SWNT-based composites can achieve higher damping than composites with other types (different size, surface area, density and stiffness) of fillers. These results confirm the advantage of using CNTs for damping enhancement.
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Naji, Ahmed, Petra Pötschke i Amir Ameli. "Melt Processed Conductive Polycarbonate Composites With Ternary Fillers Towards Bipolar Plate Applications". W ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/smasis2018-8046.
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The demand for clean and sustainable energy sources continuously increases. One of the promising ways to provide electrical power is using fuel cells. Polymer electrolyte membrane fuel cell (PEMFC) represents the most common type of fuel cells. However, PEMFCs have not yet been fully commercialized because of the high cost and low performance. A main part of PEMFC, which significantly contributes to the cost and weight is the bipolar plate (BPP). The US Department of Energy (DOE) has recommended some physical properties for BPP for sustainable commercialization of PEMFC. Those set properties have yet to be met. Conductive polymer composites (CPCs) use conductive fillers such as carbon nanotube (CNT), carbon fiber (CF), and graphite (Gr) to impart electrical and thermal conductivities and can potentially provide an optimum combination of weight, cost, mechanical properties and conductivity characteristics for BPPs. In the current work, CPCs of polycarbonate (PC) filled with singular filler of CNT, binary fillers of CNT and CF and ternary fillers of CNT, CF and Gr were fabricated using melt mixing method followed by compression molding. The through-plane and in-plane electrical conductivities of the CPCs were investigated. The results showed that the electrical percolation thresholds for the PC-CNT is ∼1 wt. % CNT in both the through-plane and in-plane directions. Addition of 3 wt. % CNT to PC composites with 10 - 30 wt. % CF improved the conductivity performance. It was noticed increasing CF content from 20 to 30 wt. % did not yield a big change in conductivity, so that at 20 wt. % CF, the through-plane and in-plane electrical conductivities are 0.11 S.cm−1 and 6.4 S.cm−1 respectively. Moreover, using 20 wt. % CF will allow for higher loading of graphite. To further enhance the conductivities towards the DOE recommendations, 30 wt. % Gr was introduced to the PC composite with binary filler (i.e., 3 wt. % CNT and 20 wt. % CF). The results showed that the through-plane and in-plane electrical conductivities were increased to 1.5 S.cm−1 and 13.5 S.cm−1, respectively. These properties recommend a potential application of polycarbonate based CPCs for BPP manufacturing.
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Melentyev, S. V., T. D. Malinovskaya i S. V. Pavlov. "Influence of carbon fillers nature on the structural and morphological properties of polyurethane-based composites". W ADVANCED MATERIALS IN TECHNOLOGY AND CONSTRUCTION (AMTC-2015): Proceedings of the II All-Russian Scientific Conference of Young Scientists “Advanced Materials in Technology and Construction”. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4937855.
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Luca Motoc, Dana. "Dynamic Mechanical Characterization of CF/GF Hybrid Reinforced Polymeric Composite Structures". W ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/esda2012-82185.
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The importance of dynamic mechanical analysis (DMA) as a research tool in the study of polymeric composite structures behavior has been already demonstrated in the literature. Many papers were approaching the relaxation phenomenon within the polymer based composite structures and thereby their behavior under various conditions of stress and temperature. Supplementary, the effect of fillers geometry, orientation and volume fraction have been extensively approached while considering the micromechanical level and their role in the mechanical properties were suitable stated. Hybridization of two different fillers has proven to an effective method in material design allowing their developers to tailor their properties according to the application driven imposed requirements. The herein paper attempts to present a comparative study centered on the development and characterization of a hybrid polymeric composite structures made up from different combinations of carbon and glass fibers by evaluating their dynamic mechanical properties. The samples were measured using the Dynamic Mechanical Analyzer (DMA) from NETZSCH-DMA 242 C, in the 3-point bending mode, nitrogen atmosphere, at a scanning rate of 3 K/min from −40 to 180° C with a fixed frequency of 1 Hz. Storage and loss modulus, loss tangent were recorded as function of temperature both on longitudinal and transverse direction of the unidirectional carbon fibers, in two consecutive heating cycles. A reference sample was set up to aid the comparison analysis, made entire from one filler type. The effect of the fillers type, fillers relative volume fraction and temperature on the storage and loss moduli will be deeply investigated.
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Egiziano, Luigi, Patrizia Lamberti, Giovanni Spinelli, Vincenzo Tucci, Rumiana Kotsilkova, Sonia Tabakova, Evgeni Ivanov, Clara Silvestre i Rosa Di Maio. "Morphological, rheological and electrical study of PLA reinforced with carbon-based fillers for 3D printing applications". W 9TH INTERNATIONAL CONFERENCE ON “TIMES OF POLYMERS AND COMPOSITES”: From Aerospace to Nanotechnology. Author(s), 2018. http://dx.doi.org/10.1063/1.5046014.
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Kornev, Yu V., A. N. Vlasov, Kh Kh Valiev i N. A. Semenov. "Investigation of reinforcing effects in elastomeric composites with mineral fillers, based on silicon dioxide and carbon". W INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING ICCMSE 2021. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0120100.
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Guo, Peng, Yuhan Du, Xianlin Zhang i Lingling Meng. "Comparison of the effect of various carbon fillers in the paraffin-based phase change materials------A Review". W 3rd International Conference on Material, Mechanical and Manufacturing Engineering (IC3ME 2015). Paris, France: Atlantis Press, 2015. http://dx.doi.org/10.2991/ic3me-15.2015.292.
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