Reversible two-way tuning of thermal conductivity in an end-linked star-shaped thermoset.

ABSTRACT: Polymeric thermal switches that can reversibly tune and significantly enhance their thermal conductivities are desirable for diverse applications in electronics, aerospace, automotives, and medicine; however, they are rarely achieved. Here, we report a polymer-based thermal switch consisting of an end-linked star-shaped thermoset with two independent thermal conductivity tuning mechanisms-strain and temperature modulation-that rapidly, reversibly, and cyclically modulate thermal conductivity. The end-linked star-shaped thermoset exhibits a strain-modulated thermal conductivity enhancement up to 11.5 at a fixed temperature of 60 °C (increasing from 0.15 to 2.1 W m^-1 K^-1). Additionally, it demonstrates a temperature-modulated thermal conductivity tuning ratio up to 2.3

SUBMITTER: Hartquist CM 

PROVIDER: S-EPMC11222444 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature