期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 224, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2022.109454
关键词
Copper flakes; Graphite nanoplatelets; Synergistic effect; Thermal conductivity; Self-warming
资金
- National Natural Science Foundation of China [52103123]
- State Key Laboratory of Polymer Materials Engineering [sklpme2020-3-04]
- Fundamental Research Funds for the Central Universities
- Sichuan University postdoctoral interdisciplinary Innovation Fund
In this study, a highly thermally conductive percolation network was achieved by introducing a small amount of 2D graphene nanoplatelets into polymer-copper composites, resulting in a high isotropic thermal conductivity. The resulting composite material possesses excellent thermal management ability, acid resistance, and mechanical properties.
The combination of polymer and copper (Cu) is common and economical in thermal interface materials (TIMs). However, it is remains challenging for traditional polymer-Cu composites to obtain high thermal conductivity (TC) (>10 Wm- 1K-1) due to the poor filler connection. Herein, we introduced small amount of 2D-structured graphite nanoplatelets (GNPs) into bulk Cu flakes/epoxy composites via the thermal molding method. Surprisingly, we found an extraordinary synergistic effect, revealed highly thermally conductive percolation network through intercalation of GNPs between Cu flakes. A high isotropic TC 13.4 Wm- 1K-1 is achieved with 5 wt% GNPs and 80 wt% Cu flakes, which superior than most reported Cu/polymer composites. Although a high electrical conductivity of 34000 S/m was obtained, a phonon-dominated thermal transport mechanism was observed due to the existence of GNPs bridges between Cu flakes. The resulting composite also demonstrate excellent thermal management ability, superior acid resistance and good mechanical property, which offers a promising composite in thermal management application.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据