碳纳米管改性含硅芳炔树脂的制备与导热性能  

Preparation and Thermal Conductivity of Carbon Nanotubes Modified Silicon-Containing Polyarylacetylene Resin

作　　者：王玉巧 袁荞龙[1] 黄发荣[1] WANG Yuqiao;YUAN Qiaolong;HUANG Farong(Key Laboratory of Specially Functional Polymeric Materials and Related Technology(Ministry of Education),School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学材料科学与工程学院特种功能高分子材料及相关技术教育部重点实验室,上海200237

出　　处：《绝缘材料》2021年第10期33-40,共8页Insulating Materials

基　　金：中央高校基本科研业务费专项资金资助项目(50321042017001)。

摘　　要：合成了三乙氧基乙炔基硅烷(TEOAS),采用TEOAS表面处理羟基化多壁碳纳米管(MWCNTs)制得MWCNTs-T,并对其进行表征。分别采用MWCNTs、MWCNTs-T与含硅芳炔树脂(PSA)通过溶液法制备了PSA/MWCNTs及PSA/MWCNTs-T复合材料,并对其导热性能、热稳定性、绝缘性能和弯曲性能等进行了研究。结果表明:TEOAS接枝到了MWCNTs表面,MWCNTs-T与PSA相容性好,复合材料的导热系数随MWCNTs及MWCNTs-T质量分数的增加而升高,其中MWCNTs-T对导热系数的提高更明显,加入2%质量分数的MWCNTs-T的复合材料导热系数达到0.62 W/(m·K),约为PSA的3倍。MWCNTs、MWCNTs-T的加入均会使PSA的热稳定性和弯曲强度降低,但MWCNTs-T的影响低于MWCNTs。PSA/MWCNTs复合材料的玻璃化转变温度高于500℃,复合材料的电阻率随频率增加而线性下降,但频率为10^(6)Hz时仍高于10^(8)Ω·cm。A triethoxyacetylenic silane(TEOAS)was synthesized to treat the surface of hydroxylated multiwalled carbon nanotubes(MWCNTs),and then the MWCNTs-T was obtained and characterized.PSA/MWCNTs and PSA/MWCNTs-T composite resins were prepared using solution method by mixing silicon-containing polyarylacetylene(PSA)with MWCNTs and MWCNTs-T,respectively.The thermal conductivity,thermal stability,electric insulation,and bending properties of the PSA/MWCNTs and PSA/MWCNTs-T composites were investigated.The results show that TEOAS was grafted on the surface of MWCNTs successfully,and MWCNTs-T is compatible with PSA matrix.The thermal conductivity of the composites increases with the increase of the mass fraction of MWCNTs and MWCNTs-T.The effect of MWCNTs-T is more obvious,with the mass fraction of 2%,the thermal conductivity of PSA/MWCNTs-T reaches 0.62 W/(m·K),which is 3 times as higher as that of PSA.The introduction of MWCNTs and MWCNTs-T can decrease the thermal stability and bending properties of PSA,the effect of MWCNTs-T is smaller than that of MWCNTs.The glass transition temperature of the PSA/MWCNTs is higher than 500℃,the electrical resistivity of the composite resin decreases linearly with the increase of frequency,while is still higher than 10^(8)Ω·cm at 10^(6)Hz.

关 键 词：含硅芳炔树脂 乙炔基三乙氧基硅烷 多壁碳纳米管 导热 热-物理性能 

分 类 号：TM215[一般工业技术—材料科学与工程]