Highly thermally conductive polypropylene/graphene composites for thermal management. (August 2020)

• Record Type: Journal Article
• Authors: Song, Na; Cao, Donglei; Luo, Xian; Wang, Qi; Ding, Peng; Shi, Liyi
• Is Part Of: Composites. Volume 135(2020)
• Publication Date: 2020-08
• Subjects: PP composites -- Interfacial thermal resistance -- 3D graphene network -- Thermal conductivity; Composite materials -- Periodicals; Manufacturing processes -- Periodicals; Composite materials; Manufacturing processes; Periodicals; 620.11805
• DOI: 10.1016/j.compositesa.2020.105912
• Languages: English
• ISSNs: 1359-835X

Abstract

Highlights: The unique matrix functionalization strategy was proposed to improve it's polarity. PP/PDA/G composites with 3D network were fabricated by a simple method. Through-plane TC of the composite reaches 10.93 W·m −1 ·K −1 . The obtained composite shows excellent heat dissipation for LED. Abstract: As an indispensable part of electronic devices, efficient thermal management materials can promote heat dissipation of electronic products quickly, thereby greatly improving their reliability, stability and service life. Here, a simple "in-situ building" approach was developed to fabricate highly thermally conductive polypropylene (PP)/graphene composites with three-dimensional graphene framework. Different from conventional filler modification, a unique matrix functionalization method, inspired by mussel, was carried out to form the interaction (hydrogen bonding and π-π conjugate) between PP and graphene, which greatly reduced interfacial thermal resistance. The obtained composite exhibits a quite high through-plane thermal conductivity (10.93 W·m −1 ·K −1, almost 55 times higher than that of pure PP), and shows excellent heat dissipation when used as a thermal management material in LED integration. The composite has the potential application in heat dissipation of high power and highly integrated electronic devices.