Graphdiyne for significant thermal conductivity enhancement at ultralow mass fraction in polymer composites
Mengjie Wang, Meizhen Liao, Linhong Li, Maohua Li, Yapeng Chen, Xiao Hou, Chao Yan, Nan Jiang, Jinhong Yu
Abstract
Abstract In thermal management systems, it is quite meaningful to achieve high thermal conductivity enhancement efficiency for polymer-based thermally conductive materials with low content filler. In this work, a novel 2D all-carbon allotrope, graphdiyne (GDY) was attempted as a filler to improve the thermal conductivity of the polymer matrix. The poly(vinylidene fluoride) (PVDF) composite films, with ultralow mass fraction (≤ 1 wt%) GDY, were fabricated by solution blend and hot pressing. As a consequence, the obtained composite film, at only 1 wt% GDY content, exhibited a high in-plane thermal conductivity of 3.86 W m −1 K −1 , which revealed a 2249% thermal conductivity enhancement compared with neat PVDF. This excellent heat transport performance makes GDY an attractive filler for high-performance composite for electronic cooling applications.