Abstract A amino-functionalized carbon nanotubes (CNTs)-containing sizing agent was prepared for improving the interface bonding and impact toughness of carbon fibers (CFs) reinforced unsaturated polyester (UP) composites. More reactive groups and better interfacial compatibility with UP make vinyl resin M7270 a more suitable polymer for preparing sizing agent for CF/UP composites when compared to epoxy, MR13006 and R806. The surface characteristics of CFs and the interfacial properties of the composites before and after surface modification were investigated. The observed uniformly dispersed CNTs-containing sizing agent on the CF surface obviously increased the surface roughness. The amount of polar functional groups and the wettability of CFs were significantly enhanced after the coating treatment. The interlaminar shear strength (ILSS) and impact toughness were enhanced by 32.3 and 55.2%, respectively. The sizing agent effectively enhanced the interfacial adhesion by improving the surface energy, and increasing chemical bonding and mechanical interlocking.

中文翻译：

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含乙烯基酯-碳纳米管施胶剂的界面增强不饱和聚酯碳纤维复合材料

摘要 为提高碳纤维（CFs）增强不饱和聚酯（UP）复合材料的界面结合力和冲击韧性，制备了一种含氨基官能化碳纳米管（CNTs）的施胶剂。与环氧树脂、MR13006 和 R806 相比，更多的反应基团和与 UP 更好的界面相容性使乙烯基树脂 M7270 更适合用于制备 CF/UP 复合材料的施胶剂。研究了表面改性前后CFs的表面特性和复合材料的界面性质。在CF表面观察到均匀分散的含碳纳米管的施胶剂明显增加了表面粗糙度。涂层处理后极性官能团的数量和CFs的润湿性显着提高。层间剪切强度 (ILSS) 和冲击韧性分别提高了 32.3% 和 55.2%。施胶剂通过提高表面能、增加化学键合和机械互锁，有效地增强了界面附着力。