Anisotropic thermal conductive properties of hot-pressed polystyrene/graphene composites in the through-plane and in-plane directions

被引：121

作者：

Ding, Peng ^{[1
]}

Zhang, Jin ^{[1
]}

Song, Na ^{[1
]}

Tang, Shengfu ^{[1
]}

Liu, Yimin ^{[1
]}

Shi, Liyi ^{[1
]}

机构：

[1] Shanghai Univ, Res Ctr Nanosci & Nanotechnol, Shanghai 200444, Peoples R China

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2015年 / 109卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Functional composites; Polymer-matrix composites (PMCs); Thermal properties; Isostatic pressing; GRAPHENE OXIDE; REDUCTION; NANOCOMPOSITE;

D O I：

10.1016/j.compscitech.2015.01.015

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

The interactions between polystyrene (PS) and graphene as well as the factors leading to anisotropic thermal conductive properties in the in-plane and through-plane directions of the hot-pressed samples were studied. In this procedure, the PS/graphene composites (PG) were prepared via solution mixing followed by hot-pressing method, the graphene oxide (GO) was simultaneously modified and reduced to graphene nanosheets by p-phenylene diamine. And the polydispersity index of PS matrix was controlled at as narrow as 1.14 by reversible addition-fragmentation chain transfer (RAFT) polymerization. The characterization showed that the thermal conductivity of PG composites with 10 wt% graphene loading was enhanced by 66% to 0.244W m(-1) K-1 compared with 0.147W m(-1) K-1 of pure PS. The thermal diffusivity (alpha) of hot-pressed PG samples showed anisotropic behavior according to the heat transfer directions. The alpha of in-plane direction was almost ten times higher than that of in through-plane direction. And both of them changed slowly in function of graphene loadings. This anisotropic property may be caused by the ordered arrangement of graphene sheets and PS chains after PG composites were hot-pressed. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：25 / 31

页数：7

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