Affiliation:
1. School of Chemistry and Chemical Engineering Southeast University Nanjing 211189 China
2. School of Materials Engineering Changshu Institute of Technology Changshu 215500 China
Abstract
AbstractPhase change materials (PCMs) are paramount for the thermal management of electronics. However, the present PCMs encounter a dilemma in balancing the thermal conductivity and effective latent heat, compromising the heat dissipation function of PCMs for electronics. This work successfully integrates ternary metals and polymer science to design novel PCMs composed of a ternary metal (TM, Ga0.20In0.46Sn0.34) with precise composition and polyethylene glycol (PEG) by physical blending. Due to the introduction of PEG with high melting enthalpy, the ternary metal in PEG (TM@PEG) simultaneously has high thermal conductivity (7.086 W m−1 K−1), desirable effective latent heat (143.6 J cm−3), suitable phase change range, and durability. During thermal management, the thermal conductivity and effective latent heat of TM@PEG contribute to suppressing the working temperature and delaying the temperature rise rate of electronics, respectively. Hence, the TM@PEG effectively behaves as the thermally conductive grease for LEDs and CPU to control the working temperature of electronics in a reasonable range. This work offers a new perspective for TM applied in thermal management.
Funder
National Natural Science Foundation of China
Subject
Materials Chemistry,Organic Chemistry,Polymers and Plastics,Physical and Theoretical Chemistry,Condensed Matter Physics