Excellent thermal conductivity and electrical insulation of vertically aligned graphene fluoride/epoxy composite
발표자
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초록
내용
Graphene fluoride (GF), a new derivative of graphene, given its excellent thermal conductivity and insulation. In this study, a freeze casting method was used to make a VA-GF scaffold mixed with polyethyleneimine (PEI) as a dispersant and a binder. Using vertical alignment of GF scaffolds, epoxy composites exhibited through-plane thermal conductivity of about 1 W/mK at 15 vol% of GF loading, corresponding to 465% enhancement over pure epoxy. The electrical conductivity was also studied according to the frequency. As the GF content and frequency increased, the electrical conductivity of the composite material increased from 10-9 to 10-8 S/m in the frequency range of 103 to 106 Hz, hence exhibiting insulating property. This research was supported from the Ministry of Science, ICT and Future Planning (2017R1A2B4005200), with support from the Ministry of Education's Basic Science Research Capacity Enhancement Project (2019R1A6C1010047), and with support from the Ministry of Trade, Industry and Energy (20011089).