Assembly of graphene-aligned polymer composites for thermal conductive applications

Zhang, Zhi-xing; Qu, Jingyi; Feng, Yiyu; Feng, Wei

doi:10.1016/j.coco.2018.04.009

Cited by 102 publications

(31 citation statements)

References 67 publications

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“…However, the effect of GNPs depends also on other parameters: size and orientation of graphene plates, morphology of plates, and resistance of interfaces with the matrix. The positive effect of GNP alignment for thermal conductive applications has been reviewed by Zhang et al [41]. Moreover the intrinsic thermal conductivity of GNPs is greatly affected by the presence of defects [41], and also depends on the platelet size.…”

Section: Resultsmentioning

confidence: 99%

“…The positive effect of GNP alignment for thermal conductive applications has been reviewed by Zhang et al [41]. Moreover the intrinsic thermal conductivity of GNPs is greatly affected by the presence of defects [41], and also depends on the platelet size. In fact, according to Raza et al [21] the conductivity of a silicon-based composite with 25 wt.% of GNPs decreases from 3 W/(m·K) to 1.18 W/(m·K) when using plates 15 µm and 5 µm wide, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Electrical and Thermal Conductivity of Epoxy-Carbon Filler Composites Processed by Calendaring

et al. 2019

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Electrical and thermal conductivity of composites which contain carbon-based fillers in an epoxy matrix were investigated. The fillers were dispersed in the liquid matrix by using three roll mill equipment. The filler/matrix mixture was cast in a mold and then cured, thus obtaining composite specimens. Multiwall carbon nanotubes, graphene-like nanoplatelets, and graphite were used as fillers and their effect on conductivity was investigated. Electrical and thermal conductivity were measured at different filler loads. It was found that the formation of percolation paths greatly enhanced electrical conductivity, although they were not so effective in improving thermal conductivity. The behavior of composites containing each single filler was compared with that of hybrid composites containing combinations of two different fillers. Results show that fillers with different aspect ratios displayed a synergetic effect resulting in a noticeable improvement of electrical conductivity. However, only a small effect on thermal conductivity was observed.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Electrical and Thermal Conductivity of Epoxy-Carbon Filler Composites Processed by Calendaring

et al. 2019

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“…The value of p c for composites containing spherical particles is predicted to be about 16 vol% , which is more than the determined value in this research (10 vol%). The electrical percolation in polymer composites depends not only on the shape of fillers but also on the type of fillers and polymer bases, the morphology of polymer bases, and the condition of the process . For instance, the p c value of the PE/Ag composite with an average diameter of 150 nm Ag NPs was 17 vol% .…”

Section: Resultsmentioning

confidence: 99%

Poly(dimethylsiloxane)/Cu/Ag nanocomposites: Electrical, thermal, and mechanical properties

2019

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Multifunctional materials are urgently required for sensing and actuation purposes in microfluidic devices. In this study, poly(dimethylsiloxane) (PDMS) filled with Cu and Ag nanoparticles was prepared and its electrical conductivity (EC), thermal conductivity (TC), and mechanical properties were investigated. EC investigations showed that all the prepared compositions had a nearly similar percolation threshold of around 10 vol% of filler. However, the EC of nanocomposites filled with both Cu and Ag (PDMS/Cu/Ag) was about 1.8 S/cm, which was 200% higher compared with that of other compositions (0.3 and 0.6 S/cm). TC was found to undergo profound increase of 10.5-fold (1.68 W.m −1 .K −1 for PDMS/Cu/Ag) when compared with that of the insulating base polymer (0.16 W.m −1 .K −1 ). Evaluation of mechanical properties demonstrated that Young's modulus of PDMS increased by 270% after adding the filler content, but the tensile strength showed a notable reduction of 12%. The final result of this study showed that PDMS/Cu/Ag nanocomposites could be considered as a suitable novel material in microchannel preparation and microfluidic devices. POLYM. COMPOS., 40:4093-4101, 2019.

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“…The excellent properties like physical, mechanical, chemical, electrical, thermal, optical, etc., along with the low cost of the composites as compared to the conventional materials facilitated their applications in the above fields. [ 1–9 ] One of the most important characteristics of reinforced polymer composites to be used in the above applications is wear resistance. [ 10–12 ] Kurdi et al revealed that, better is the mechanical properties like, compressive strength, hardness, and impact strength of the polymer composites, higher is the resistance to wear at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Wear characteristics of glass‐polyester‐based hybrid composites: A parametric analysis using response surface method and fuzzy logic

2020

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Marble dust generated during processing of the marble producing rocks is a major solid waste with a detrimental impact on environment. Analysis shows that this waste has constituents having compounds like SiO2, Al2O3, Fe2O3, CaO, MgO, etc., in different proportions. This paper explores on the possible use of waste marble dust as secondary filler in glass‐polyester composites and reports on its dry sliding wear characteristics. Such hybrid composites with unsaturated polyester as the matrix are fabricated by keeping the woven glass fibre loading fixed and by varying the weight fraction of the particulate filler, that is, marble dust through a simple hand layup route. Dry sliding wear trials are conducted under different test conditions as per ASTM G 99‐05 following the L30 model of response surface method (RSM). A parametric appraisal of the wear process is made using RSM and the significant control factors and their interactions influencing the specific wear rates are identified. Scanning electron microscopy of the worn composite surfaces is done to ascertain the wear mechanism. It is found that the presence of marble dust improves the wear resistance of unfilled glass‐polyester composites substantially. Further, prediction of wear rate of the composites for a wide range of filler content and sliding velocities is conducted using RSM and another prediction model based on fuzzy logic and the outcomes are compared.

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Assembly of graphene-aligned polymer composites for thermal conductive applications

Cited by 102 publications

References 67 publications

Electrical and Thermal Conductivity of Epoxy-Carbon Filler Composites Processed by Calendaring

Electrical and Thermal Conductivity of Epoxy-Carbon Filler Composites Processed by Calendaring

Poly(dimethylsiloxane)/Cu/Ag nanocomposites: Electrical, thermal, and mechanical properties

Wear characteristics of glass‐polyester‐based hybrid composites: A parametric analysis using response surface method and fuzzy logic

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