摘要
目的:通过在苎麻纤维表面接枝纳米二氧化硅颗粒,改善苎麻纤维与环氧树脂的界面粘结性能,从而提升苎麻纤维增强环氧树脂复合材料的力学性能。创新点:将纳米二氧化硅颗粒接枝到苎麻纤维表面,从而大幅提升苎麻纤维与环氧树脂的界面粘结性能与复合材料的力学性能。方法:利用十二烷基硫酸钠均匀分散二氧化硅纳米粒子,并在硅烷偶联剂作用下,将二氧化硅纳米粒子接枝到苎麻纤维表面。结论:纳米二氧化硅接枝到苎麻纤维表面大幅提升了纤维表面粗糙度,降低了纤维亲水性能,升高了纤维与环氧树脂的界面粘度,从而改善了复合材料的力学性能。
To enhance the bonding properties between ramie fiber and epoxy resin,the ramie fiber was modified using nano-silica grafting.Hydrophilic nano-silica treated with water-soluble sodium dodecyl sulfate(SDS)and organic silane coupling agents was grafted onto the surface of ramie fiber.The surface roughness of the fibers was considerably increased after grafting.The nano-silica particles on the fiber surface enhanced the mechanical and thermal properties of the fiber-epoxy composite plates.Based on an analysis of contact angle measurements and a water absorption study,it was determined that the hydrophilicity of the treated fiber was weakened.
基金
supported by the Chinese MIIT Special Research Plan on Civil Aircraft(No.MJ-2015-H-G-103)
the National Natural Science Foundation of China(No.51878223)
关键词
纳米二氧化硅
十二烷基硫酸
硅烷偶联剂
苎麻纤维
力学性能
界面性能
Nano-silica
Sodium dodecyl sulfate(SDS)
Silane coupling agent
Ramie fiber
Mechanical properties
Interfacial properties
