Electric-field-assisted fabrication of metal-class thermal-conductive and elastomer-class-flexible composites comprising plasma-surface-modified hexagonal boron nitride and polyrotaxane

• DOI: 10.1016/j.compositesa.2024.108197
• Publication Date: 2024-04-12T08:39:18Z
• Authors: Rui Hasegawa; Kenichi Inoue; Hitoshi Muneoka; Tsuyohito Ito; Kazuhiro Kirihara; Yoshiki Shimizu; Yukiya Hakuta; Kohzo Ito; Kazuo Terashima

There is a growing demand for materials with high thermal conductivity, electrical insulation, flexibility, and toughness application in flexible electronic devices. To develop the aforementioned properties, composites comprising tough polyrotaxane (PR) highly thermally conductive hexagonal boron nitride particles (hBN) were fabricated this study. An electric field was applied during polymerization of to improve their conductivity out-of-plane direction without reducing flexibility. Electric-field controlled orientation hBN as-synthesized composites, forming pillar-like structures oriented hBN. The particle diameter concentration optimized synthesize an electrically insulating composite elastomer-class flexibility in-plane (a low Young's modulus 77 MPa) metallic-alloy-class (>10 W/mK) wide range potential applications including interface