快速固化碳纳米管/苎麻纤维/环氧树脂复合材料层板的制备与性能

Fabrication of Rapid Cure Carbon Nanotube/Ramie Fiber/Epoxy Resin Composites and Their Properties

中文关键词: 复合材料 界面 聚合物 碳纳米管

英文关键词: composites, interface, polymers, carbon nanotube

中文摘要:

      针对植物纤维/树脂基复合材料高性能化问题,本研究以羟基化碳纳米管/无水乙醇分散液预先浸渍苎麻纤维织物,得到了碳纳米管分散均匀的碳纳米管/苎麻纤维多尺度复合织物,并进一步以快速固化环氧树脂为基体,采用真空辅助树脂灌注成型工艺(VARI)制备了碳纳米管改性的苎麻纤维/环氧树脂基复合材料层板(PRFC)。研究结果表明,相比未采用碳纳米管改性的苎麻纤维/环氧树脂复合材料(RFC),PRFC的弯曲强度提高14.7%,冲击强度提高20.9%。相比碳纳米管预先分散于环氧树脂基体中制备的碳纳米管改性苎麻纤维/环氧树脂复合材料(MRFC),PRFC的力学性能提高更显著。同时,PRFC的吸湿性能比MRFC和RFC的明显降低。

英文摘要:

      In order to improve the mechanical property of plant fiber/resin matrix composites, carbon nanotube/absolute ethanol solution was fabricated, and multiscale fabric of carbon nanotube/ramie fiber was fabricated utilizing a pre-impregnation process. Based on a rapid cure epoxy resin, carbon nanotube/ramie fiber/epoxy resin composites (PRFC) was fabricated by vacuum assisted resin infusion molding process. The results showed that the flexural strength and impact strength of PRFC were improved 14.7% and 20.9%, respectively, compared to the composites without carbon nanotube (RFC). Compared to the composites (MRFC) that fabricated by the epoxy resin mixing with carbon nanotube directly, the improvement of mechanical properties of PRFC was more remar-kable. In addition, the water absorption rate of PRFC was obviously lower than those of MRFC and RFC.