Abstract Conductive liquid silicone rubber-based composites were prepared through incorporation of fumed silica (FSiO2) and polydimethylsiloxanes (PDMS) modified MWCNTs (P-MWCNTs), and their mechanical and electrical properties were investigated. It is shown that the introduction of P-MWCNTs with P-MWCNTs/FSiO2 ratio of 0.25/30 (w/w) increases the cross-linking density and the thermal stability of the composites significantly. The improved mechanical performance, e.g., 60 % increase for Young's modulus and 47 % increase for tear strength, should be ascribed to the stronger interfacial interaction between P-MWCNTs and PDMS matrix and better dispersion of P-MWCNTs due to existence of PDMS on CNTs surface. Moreover, the better dispersion of P-MWCNTs also ensures much higher electrical conductivity than original carboxyl functionalized MWCNTs (COOH-MWCNTs) at relatively low loading, e.g., 10−3 S m−1 versus 10−8 S m−1 at MWCNTs/FSiO2 ratio of 2.5/30, which could be attributed to the formation of CNTs network.

中文翻译：

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导电 PDMS 接枝碳纳米管增强有机硅弹性体

摘要 通过加入气相二氧化硅（FSiO2）和聚二甲基硅氧烷（PDMS）改性多壁碳纳米管（P-MWCNTs）制备导电液态硅橡胶基复合材料，并研究了它们的机械和电学性能。结果表明，P-MWCNTs/FSiO2 比为 0.25/30 (w/w) 的 P-MWCNTs 的引入显着提高了复合材料的交联密度和热稳定性。改进的机械性能，例如杨氏模量增加 60% 和撕裂强度增加 47%，应归因于 P-MWCNTs 和 PDMS 基质之间更强的界面相互作用以及由于 CNTs 上存在 PDMS 导致 P-MWCNTs 更好的分散表面。而且，