Polyarylene ether nitrile/boron nitride nanosheets thermally conductive films through heterogeneous multilayer electrostatic spinning

Abstract

Thermal management materials with excellent thermal conductivity and electrical insulation are highly favorable in the modern integrated electronic areas. In present work, a novel polyarylene ether nitrile (PEN) composite film, integrating thermal conductivity, electrical insulation, and flexibility, was fabricated utilizing a hybrid approach combining heterogeneous multilayer electrostatic spinning with a subsequent hot pressing technique. BNNS acts as a thermally conductive filler which builds a good thermal conduction pathway, and PEN acts as a bonding agent which ensures the flexibility and insulation of the film. Heterogeneous multilayer electrostatic spinning ensures the formation of thermal conduction pathways. Compared to conventional composite film, heterogeneous multilayer film shows excellent thermal conductivity, increases by 83% in-plane, and 71% through-plane, respectively. Therefore, This work will provide a technological reserve for the preparation of thermally conductive and insulating flexible films.