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Mechanical and electrical properties of polymer-derived Si-C-N ceramics reinforced by octadecylamine - Modified single-wall carbon nanotubes

机译：十八烷基胺增强的聚合物衍生的Si-C-N陶瓷的机械和电性能-改性单壁碳纳米管

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摘要

Polymer-derived Si-C-N ceramics reinforced by homogeneously distributed octadecylamine-functional-ized single-walled carbon nanotubes (SWCNTs) were synthesized using a casting process, successive pressureless cross-linking and thermolysis. We find that the incorporation of even small amounts of modified SWCNTs leads to a remarkable improvement of mechanical and electrical transport properties of our composites. In particular, we find twofold enhancement of fracture toughness. The Youngs modulus and the hardness show increase by ~30% and 15%, respectively. Furthermore, the electrical conductivity was found to increase more than five orders of magnitude even for a tube content of 0.5 wt.%.
机译：采用流延法，连续无压交联和热解法，合成了由均匀分布的十八烷基胺官能化的单壁碳纳米管（SWCNT）增强的聚合物衍生的Si-C-N陶瓷。我们发现，即使加入少量的改性SWCNT，也可以显着改善复合材料的机械和电传输性能。特别是，我们发现断裂韧性得到了双重提高。杨氏模量和硬度分别提高了约30％和15％。此外，发现即使管含量为0.5重量％，电导率也增加超过五个数量级。

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