Thermal conductivity improvement of surface-enhanced polyetherimide (PEI) composites using polyimide-coated h-BN particles

Abstract

In this study, we investigated the thermal conductivities and mechanical properties of polyetherimide (PEI) composites using polyimide (PI)-coated h-BN (PI-BN) particles. We found that PI-coated h-BN effectively increased adhesion with the PEI matrix, imparting enhanced mechanical and thermal stability and thermal conductivity with increasing BN content. The thermal conductivity of the PEI composite containing 60 wt% PI-BN was 3.3 W m(-1) K(-1), while the thermal conductivity of the PEI/BN composite without modification was 2.6 W m(-1) K(-1). The PEI/PI-BN composites show higher impact strengths than the PEI/BN composites because of less BN particle agglomeration and good wettability between PEI and h-BN. The results indicate that the PI-coated BN incorporated into the PEI matrix effectively enhances the thermal conductivity and mechanical properties of the PEI composites.

Flame retarding epoxy composites with poly(phosphazene-co-bisphenol A)-coated boron nitride to improve thermal conductivity and thermal stability

“…36 There are few reports about the coated BN particles physically to form core-shell structures for thermally conductive epoxy composites, which greatly broaden the BN surface modied methods. 37,38 In this work, the other objective was to increase the resistance of the epoxy matrix to ignition and to reduce the ame spread. Hexachlorocyclotriphosphazene was a versatile starting oligomer for the synthesis of phosphazene-based polymers.…”

Two-Dimensional Nanomaterials-Based Polymer Composites: Fabrication and Energy Storage Applications

“…Several strategies have been employed to functionalize the 2D h-BN, for example, PS and PMMA were used to coat h-BN particles, resulting in an enhanced interfacial adhesion [101]. Lee et al [102] demonstrated thermal conductivity enhancement with modi ed h-BN/polyetherimide (PEI). Following the same idea…”

Cyanate ester composites containing surface functionalized BN particles with grafted hyperpolyarylamide exhibiting desirable thermal conductivities and a low dielectric constant

“…16,17 Thus far, many scholars have studied the properties of BN-lled composites. 12,18 Huang and Ishida 13 studied the effects of BN surface modication on the polymerization and dynamic mechanical properties of benzooxazinyl composites. Huang et al 4 prepared epoxy composites via surface treatment of BN.…”