导热阻尼硅橡胶复合材料的制备及性能

Research on preparation and performance of thermally conductive damping silicone rubber composite

以甲基乙烯基苯基硅油为基体材料,添加一定量的硅烷偶联剂处理的六方氮化硼(hBN),与含氢硅油反应固化,制备得到硅橡胶复合材料,并研究了其力学性能、导热性能、阻尼性能与偶联剂、填料之间的关系。结果表明,用N313硅烷偶联剂进行表面处理后的填料在其填充体积分数为9%,时综合性能较好,导热系数达到0.47 W/(m·K),阻尼损耗因子(tanδ)达到0.76,体积电阻率为3×10^(13)Ω·cm。

Using methyl vinyl phenyl silicone oil as the matrix material,adding a certain amount of hexagonal boron nitride treated with a silane coupling agent,reacting and curing with hydrogen-containing silicone oil,we prepare a silicone rubber composite material,and study its mechanical properties and thermal conductivity,the relationship between damping performance and coupling agent and filler.The experimental results show that the filler after surface treatment with N313 silane coupling agent has better overall performance when its filling volume is 9%,the thermal conductivity reaches 0.47 W/(m·K),the damping loss factor tanδreaches 0.76,and the volume resistivity is 3×10^(13)Ω·cm.