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Research Papers

Enhanced Thermal Conductivity for Graphene Nanoplatelets/Epoxy Resin Composites

[+] Author and Article Information
Dahai Zhu, Yu Qi, Lifei Chen, Mingzhu Wang

School of Environment and
Materials Engineering,
College of Engineering,
Shanghai Polytechnic University,
Shanghai 201209, China

Wei Yu

School of Environment and Materials
Engineering,
College of Engineering,
Shanghai Polytechnic University,
Shanghai 201209, China
e-mail: yuwei@sspu.edu.cn

Huaqing Xie

School of Environment and
Materials Engineering,
College of Engineering,
Shanghai Polytechnic University,
Shanghai 201209, China
e-mail: hqxie@sspu.edu.cn

1Corresponding authors.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received January 6, 2017; final manuscript received March 21, 2017; published online July 25, 2017. Assoc. Editor: Jingchao Zhang.

J. Thermal Sci. Eng. Appl 10(1), 011011 (Jul 25, 2017) (5 pages) Paper No: TSEA-17-1002; doi: 10.1115/1.4036796 History: Received January 06, 2017; Revised March 21, 2017

Graphene nanoplatelets (GNPs) have excellent thermal conductivity. It can significantly improve the heat-conducting property of epoxy resin (EP) matrix. In this paper, the GNPs/EP composites were successfully prepared by using ultrasonication and the cast molding method. The prepared GNPs/EP composites were systematically characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermal conductivity analyzer. Some factors affecting the thermal transfer performance of the composites were discussed. The defoamation has great influence on the thermal conductivity of composite. There is a nearly linear relationship between the mass fraction and the thermal conductivity of composite when the mass fraction of GNPs is below 4.3%. The results show that when the mass fraction of GNPs is 4.3% with crushing time of 2 s, the thermal conductivity of GNPs/EP composite is up to 0.99 W/m K. The thermal conductivity is increased by 9.0% compared with that without pulverization treatment (0.91 W/m K). When it is ground three times, the thermal conductivity of composite reaches the maximum (1.06 W/m K) and it is increased by 307.7% compared with that of epoxy resin matrix.

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Figures

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Fig. 1

The preparation process of GNPs/epoxy composites

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Fig. 2

The apparent density of GNPs with pulverization time

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Fig. 3

The thermal conductivity of GNPs/EP composites with pulverization time of GNPs

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Fig. 4

SEM images of GNPs: (a) before pulverization and (b) after pulverization (time: 2 s)

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Fig. 5

The thermal conductivity of GNPs/EP composites with and without deaeration treatment

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Fig. 6

The effect of grinding times on the thermal conductivity of GNPs/EP composites with different mass fractions of GNPs

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Fig. 7

The thermal conductivity of GNPs/EP composites with mass fraction of GNPs

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Fig. 8

XRD patterns: (a) GNPs and (b) GNPs/EP

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Fig. 9

SEM image for the fracture surface of epoxy/GNP composites

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