增加化合并聚合物复合材料的导热性通过结合工程
Wenbo Lin1,2,3, Yanfeng Li4, Xirui Liu1,2
1State Key Laboratory of Functional Crystals and Devices, State Key Laboratory of Structural Chemistry, and Fujian Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, P. R. China. linyue@fjirsm.ac.cn.
Materials horizons
|June 17, 2025
概括
这项研究通过设计界面键来增强聚合物复合材料的导热性. 增加的键密度显著降低了热阻,提高了先进热管理的性能.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 纳米技术纳米技术
背景情况:
- 在功率电子产品中,有效的热管理需要高导热性聚合物复合材料.
- 界面热阻 (R_Kapitza) 限制了填充剂如化纳米片 (BNNS) 的热导电性增强.
研究的目的:
- 在填充剂-矩阵接口设计键密度 (HBD),以减少R_Kapitza.
- 通过控制界面特性来增强聚合物复合材料的导热性.
主要方法:
- 合成的聚乙醇 (PVA) 矩阵与不同的HBDs通过移植3,4-二基烯氨酸 (DOPA).
- 在工程PVA矩阵中纳入了BNNS.
- 在不同的HBD和BNNS负载下测量R_Kapitza和复合热导率 (kappa_c).
主要成果:
- 更高的界面HBD显著降低了R_Kapitza.
- 获得了0.60 × 10^-8 m^2 K W^-1的R_Kapitza和120 W m^-1 K^-1的填充效率.
- 一个BNNS复合物,70体积%的负载和HBD的2.14 mmol cm^-3达到51.01 W m^-1 K^-1,比较较低的HBD增加1.45倍.
结论:
- 接口结对于优化聚合物复合材料的热传输至关重要.
- 该研究为设计用于热管理的高性能聚合物复合材料提供了一个框架.
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