Abstract The effect of carbon nanotube (CNT) functionalization in altering the properties of epoxy-CNT composites is presented. The presence of functional groups effectively influenced the colloidal behavior of CNTs in the precursor epoxy resin and the hardener triethylenetetramine (TETA), which affected the synthesis process and eventually the interfacial interactions between the polymer matrix and the CNTs. The physical, thermal, and electrical properties of the composites exhibited strong dependence on the nature of functionalization. At a 0.5-wt% CNT loading, the enhancement in tensile strength was found to be 7.2%, 11.2%, 11.4%, and 14.2% for raw CNTs, carboxylated CNTs, octadecyl amide-functionalized CNTs, and hydroxylated CNTs, respectively. Glass transition temperatures (Tg) also varied with the functionalization, and composites prepared using hydroxylated CNTs showed the maximum enhancement of 34%.

中文翻译：

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碳纳米管 (CNT) 官能化在环氧-CNT 复合材料中的作用

摘要 介绍了碳纳米管 (CNT) 功能化对环氧-CNT 复合材料性能的影响。官能团的存在有效地影响了前体环氧树脂和硬化剂三亚乙基四胺 (TETA) 中 CNT 的胶体行为，从而影响了合成过程，并最终影响了聚合物基体与 CNT 之间的界面相互作用。复合材料的物理、热和电性能表现出对功能化性质的强烈依赖。在 0.5-wt% CNT 负载下，发现原始 CNT、羧化 CNT、十八烷基酰胺官能化 CNT 和羟基化 CNT 的拉伸强度分别提高了 7.2%、11.2%、11.4% 和 14.2%。玻璃化转变温度 (Tg) 也随官能化而变化，