Thermal Insulation Foam of Polystyrene/Expanded Graphite Composite with Reduced Radiation and Conduction.

ABSTRACT: Expanded graphite (EG) with high infrared (IR) absorption is incorporated at low concentrations (≤2 wt%) into polystyrene (PS) foams to reduce radiative thermal conductivity and solid thermal conductivity, which account for 20~40% and 10~30% of total thermal conductivity, respectively. After systematically and quantitatively investigating thermal insulation behavior in PS/EG foams, it was found that the inclusion of 1 wt% EG in 25-fold expanded PS/EG foam blocks over 90% of the radiative thermal conductivity, with only a marginal increase in heat conduction. A great reduction in total thermal conductivity from 36.5 to 30.2 mW·m^-1·K^-1 was then achieved. By further optimization using a co-blowing agent in the supercritical CO₂ foaming process, superthermal in

SUBMITTER: Gong P 

PROVIDER: S-EPMC12030753 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature