摘要
利用硅烷偶联剂(KH550)作为稻壳纳米SiO2(以下简称SiO2)的表面改性剂,研究了KH550用量对SiO2性质的影响。结果表明,KH550能将团聚的SiO2分散开,改善SiO2的表面性质;随KH550用量增加,团聚体尺寸减小,纳米粒子之间的空隙增大。将SiO2作为环氧树脂(EP)填料,探讨了KH550用量对复合材料力学性能的影响。当SiO2质量分数为5%时,材料的拉伸强度、拉伸模量、断裂伸长率和玻璃化转变温度(tg)先随KH550用量增加然后再减小。KH550质量分数5%～8%时,复合材料各项性能之间平衡性好,综合性能最佳。
Silica coupling agent（KH550） was used to modify amorphous nano silica from rice husk（SiO2）. The effects of KH550 content on the properties and structure of SiO2 were investigated. Results show that aggregation of SiO2 is departed and the sur- face properties of the particles are changed after being modified by KH550. With KH550 content increasing, the dimension of the silica aggregations decreases gradually and the space between the nano particles enlarges. SiO2 modified with different content of KH550 were used as filler for epoxy resin （EP）. The mechanical properties and glass transition temperature （t~） of the composites were investigated. When mass frac- tion of silica is 5%, the tensile strength, tensile modulus, elongation at breaking,t~ of the composites increase firstly and then decrease with the dosage of KH550 increasing. When the dosage of KH550 is between 5% and 8%, the properties reach a good bal- ance and the comprehensive performance of the composites is excellent.
出处
《现代塑料加工应用》
CAS
北大核心
2012年第5期31-34,共4页
Modern Plastics Processing and Applications
基金
武汉市科技攻关计划项目(20115004116-39)资助
关键词
稻壳
纳米二氧化硅环氧树脂
硅烷偶联剂
力学性能
rice husk nano silica epoxy resin silica coupling agent mechanicalproperties
