Yu Xiao, Qiao Bo, Cai Fei, Xiao Ji-Hai, Yang Wei, Wu Si-Zhu
State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology Beijing 100029 China.
Beijing Institute of Smart Energy Beijing 102209 China. Email:
RSC Adv. 2023 Apr 11;13(16):11182-11191. doi: 10.1039/d3ra00428g. eCollection 2023 Apr 3.
Polymer-based composites are widely used in microelectronics and wireless communications, which require high thermal conductivity and low dielectric loss for effective heat dispersion and signal transmission. Different lengths of hydroxyl silicone oil chains modified boron nitride/silicone rubber composites were explored and prepared in this work. Experiments demonstrate that the long-chain modified BN improves the thermal conductivity and decreases the dielectric loss of composites. A molecular dynamics simulation was employed to study the mechanism and affecting variables. The calculated results indicated that the improvement of the thermal and dielectric properties is mainly related to the interfacial behavior, including interfacial compatibility, interfacial bond strength, and phonon matching. Based on the simulated interfacial behavior and thermal conductivity, the thermal and dielectric properties of different chain-length modified boron nitride/silicone rubber composites have been anticipated. The results show that the longer-chain modified boron nitride/silicone rubber composites have better thermal and dielectric properties. This research may give a theoretical foundation for the development of materials with designable performance for electronic devices.
基于聚合物的复合材料广泛应用于微电子和无线通信领域，这些领域需要高导热性和低介电损耗以实现有效的热扩散和信号传输。在本研究中，探索并制备了不同长度的羟基硅油链改性氮化硼/硅橡胶复合材料。实验表明，长链改性的氮化硼提高了复合材料的导热性并降低了其介电损耗。采用分子动力学模拟研究其机理及影响变量。计算结果表明，热性能和介电性能的改善主要与界面行为有关，包括界面相容性、界面结合强度和声子匹配。基于模拟的界面行为和导热性，预测了不同链长改性氮化硼/硅橡胶复合材料的热性能和介电性能。结果表明，长链改性氮化硼/硅橡胶复合材料具有更好的热性能和介电性能。该研究可为开发具有可设计性能的电子器件材料提供理论基础。
