材料科学
热导率
复合数
复合材料
热的
热阻
界面热阻
嫁接
液态金属
金属
热传导
聚合物
热力学
物理
冶金
作者
Fan Jiang,Dahai Zhu,Yifan Li,Changqing Liu,Huaqing Xie,Wei Yu
标识
DOI:10.1016/j.icheatmasstransfer.2024.107331
摘要
Thermal interface materials (TIMs) play a crucial role in addressing the heat dissipation challenges associated with high-power electrical equipment. Apart from possessing excellent thermal conductivity, and they must also exhibit low contact thermal resistance to facilitate efficient heat transfer at the interface. In this study, a novel composite with a dual-network structure was prepared by interfacial grafting to achieve superior thermal conductivity. The composite comprises polydimethylsiloxane (PDMS), functionalized boron nitride (f-BN), and liquid metal (LM). This dual network structure effectively enhances phonon transportation and significantly improves the thermal transport performance of the composite. The thermal conductivity of the obtained composite can achieve 4.4 W/m·K, accompanied by a low contact thermal resistance of 0.32 °C·cm2/W. Furthermore, the dual network structure ensures the flexibility of the composite, as evidenced by the maximum elongation reaching 267.43% at a tensile strength of 0.35 MPa. This exceptional mechanical performance is expected to alleviate stress concentration issues arising from thermal expansion mismatch, thereby enhancing the practical applicability of the prepared TIMs. Overall, this study introduces a novel approach for fabricating flexible composites with high thermal conductivity and low contact thermal resistance, offering new insights into the preparation of TIMs.
科研通智能强力驱动
Strongly Powered by AbleSci AI