Synergically effective thermal conductivity of PU coating using different combinations of additives

Heat dissipation coatings with high thermal conductivity play an important role in the thermal management of many industrial applications. It is still a big challenge to prepare highly thermal conductive coatings in the industry. Herein, we report a novel approach to prepare highly conductive thermal polyurethane composite coatings which contain dopamine-modified conductive fillers. Graphene oxide (GO), carbon nanotube (CNT), and nano-diamond (ND) were used as two-dimensional (2D), onedimensional (1D), and zero-dimensional (0D) thermal conductive fillers respectively. The thermal conductivity test results indicate that GO and CNT can form a bridge-like structure and build more heat conduction channels. The test shows that the 2D + 1D combination has better thermal conductivity and more synergistic effect than the 2D + 0D combination. (c) 2021 Elsevier B.V. All rights reserved.

Automated summary

A novel approach to prepare highly conductive thermal polyurethane composite coatings with dopamine-modified conductive fillers was reported in this study. Graphene oxide and carbon nanotube were found to form a bridge-like structure to build more heat conduction channels, leading to better thermal conductivity.