Highly Oriented Graphite Aerogel Fabricated by Confined Liquid-Phase Expansion for Anisotropically Thermally Conductive Epoxy Composites
Artikel i vetenskaplig tidskrift, 2020

Graphene-based thermally conductive polymer composites are of great importance for the removal of the excess heat generated by electronic devices. However, due to the orientation of graphene sheets in the polymer matrix, the through-plane thermal conductivity of polymer/graphene composites remains far from satisfactory. We here demonstrate a confined liquid-phase expansion strategy to fabricate highly oriented confined expanded graphite (CEG) aerogels. After being incorporated into epoxy resin (EP), the resulting EP/CEG composites exhibit a high through-plane thermal conductivity (4.14 ± 0.21 W m-1 K-1) at a quite low filler loading of 1.75 wt % (0.91 vol %), nearly 10 times higher than that of neat EP resin and 7.5 times higher than the in-plane thermal conductivity of the composite, indicating that the CEG aerogel has a high through-plane thermal conductivity enhancement efficiency that outperforms those of many graphite/graphene-based fillers. The facile preparation method holds great industrial application potential in fabricating anisotropic thermally conductive polymer composites.

graphite aerogel

expanded graphite

through-plane thermal conductivity

confined expansion

high orientation

Författare

Mengxiong Li

Fudan University

Jiangwei Liu

Fudan University

Boston College

Shaoxue Pan

Fudan University

Jiajia Zhang

Fudan University

Ya Liu

Fudan University

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Johan Liu

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Shanghai University

Hongbin Lu

Fudan University

ACS Applied Materials & Interfaces

1944-8244 (ISSN) 1944-8252 (eISSN)

Vol. 12 24 27476-27484

Ämneskategorier

Polymerkemi

Textil-, gummi- och polymermaterial

Kompositmaterial och -teknik

DOI

10.1021/acsami.0c02151

PubMed

32432449

Mer information

Senast uppdaterat

2020-09-17