文献类型：期刊文献

中文题名：聚合物基导热绝缘复合材料的性能及界面效应

英文题名：Properties and Interfacial Treatment Effect on Thermal Conductivity and Electrical Insulativity of the Polymer Composites

作者：李宾[1];李壮[2];郑彬[1];孙斌[1];戴干策[1]

机构：[1]华东理工大学化学工程联合国家重点实验室聚合物加工研究室,上海200237;[2]华东理工大学机械与动力工程学院,上海200237

年份：2008

卷号：34

期号：2

起止页码：219

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;EI(收录号：20081911245039);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：复合材料;导热;绝缘;界面效应

外文关键词：polymer composite; thermally conductive; electrically insulating; interracial effect

摘要：用不同界面处理剂和工艺对导热填料进行处理,并以熔融共混的方法制备乙烯-醋酸乙烯共聚物(EVA)/填料体系导热绝缘功能封装复合材料。研究了复合材料热导率λ和体积电阻率ρv的影响因素、变化规律及其内在原因。不同填充体系热导率和体积电阻率差别较大,变化趋势也各异;碳化硅(SiC)填充的复合材料具有更高的导热性能,φ(SiC)=0.6时,λ=2.85 W/(m.K);氮化硼(BN)和氧化锌(ZnO)填充体系的绝缘性能更好,vρ多为1012Ω.m;不同界面处理剂和工艺对复合材料热导率和绝缘电阻的影响明显不同,硬脂酸处理ZnO可使热导率提高12%,效果最好;过量的小分子处理剂相比硅烷偶联剂能更显著地降低复合材料的热导率。研究表明:界面处理对复合材料热导率的提高与否主要取决于是否能够加强与界面的结合,复合材料的传热机制可以用振动传递理论进行合理解释。
The thermally conductive inorganic fillers were treated with couplers, and the thermally conductive and electrically insulating polymer composites of ethylene vinyl acetate （EVA） filled with thermally conductive inorganic fillers were prepared. The factors of influence on the thermal conductivity and electrical resistivity of the composites were investigated. The results showed that the thermal conductivity and electrical resistivity of the composite depend on the kinds of filler,volume fraction and the couplers. The thermal conductivity of composite filled with silicone carbide was greatly improved and up to 2.85 W/（m·K）when the filler volume fraction was 0.6. By treated ZnO with stearic acid, the thermal conductivity of composite filled with ZnO was greatly improved 12%. The result suggests that the raising of the composite＇s thermal conductivity depends on the enhancement of interracial combining, and thermal conductivity mechanism of the composites can be explained with vibration transmitting theory.