Hot pressing-induced alignment of hexagonal boron nitride in SEBS elastomer for superior thermally conductive composites.

ABSTRACT: Styrene-ethylene-butylene-styrene (SEBS) composite films containing well-dispersed and highly aligned hexagonal boron nitride (hBN) platelets were achieved by a ball milling process followed by hot-pressing treatment. An ultrahigh in-plane thermal conductivity of 45 W m^-1 K^-1 was achievable in the SEBS composite film with 95 wt% hBN. The corresponding out-of-plane thermal conductivity was also as high as 4.4 W m^-1 K^-1. The hBN/SEBS composite film was further used to cool a CPU connected to a computer, resulting in a decrease by about 4 °C in the stable temperature. Percolation thresholds over 40 wt% and 60 wt% in the hBN/SEBS composites were obtained in the in-plane and out-of-plane directions, respectively. This phenomenon has rarely been report

SUBMITTER: Yu C 

PROVIDER: S-EPMC9082571 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature