材料科学
复合材料
硅氧烷
环氧树脂
碳纳米管
复合数
热导率
导电体
制作
电导率
电阻率和电导率
聚合物
医学
替代医学
病理
化学
物理化学
电气工程
工程类
作者
Zheng-Yi Wang,Xin Sun,Yang Wang,Jidong Liu,Cheng Zhang,Zheng‐Bai Zhao,Xiang‐Yun Du
出处
期刊:Polymer
[Elsevier]
日期:2022-12-01
卷期号:262: 125430-125430
被引量:22
标识
DOI:10.1016/j.polymer.2022.125430
摘要
A battery of siloxane (SiO)/multi-walled carbon nanotube (MWCT) core-shell hybrids are successfully fabricated by encapsulating MWCTs with siloxanes via the hydrolysis-condensation reaction. First, MWCT is treated by the surfactant to improve the surface polarity. Then, the hydrolysis-condensation reaction of tetraethoxysilane (TEOS) and different saline coupling agents is performed on the surface of MWCTs to achieve various core-shell hybrids. These hybrids serve as fillers of epoxy resin (EPR) to prepare high-performance thermally conductive, electrically insulating and strength-enhanced composites at low fillers loadings. The SiO/MWCT/EPR composite possesses high thermal conductivity (0.55 W m−1 K−1, which is 196.7% higher than pure EPR) and excellent electrical insulation (>1012 Ω) at 1 wt% filler loading. The thermal conductivity improvement mechanism for these composites containing SiO/MWCT core-shell hybrids is demonstrated in detail. Moreover, the siloxane encapsulation route for MWCTs significantly declines their electrical conductivity, which greatly upgrades the practical value of as-prepared thermal conductivity composites.
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