摘要
研究了在溶胶-凝胶法原位制备纳米二氧化硅复合材料过程中硅烷偶联剂与纳米二氧化硅间的作用机理,硅烷偶联剂量的变化对机理的影响以及对在环氧树脂清漆中应用性能的影响。结果表明:溶胶凝胶法纳米二氧化硅复合材料的形成机理是纳米二氧化硅表面的物理吸附水和硅羟基被硅烷偶联剂的有机部分所代替,生成分散均匀的纳米复合材料。当硅烷偶联剂的用量适当时该复合材料在环氧树脂清漆中具有良好的应用性能,表现出纳米材料特有的既增强又增韧特性,有很好的应用前景。
The interaction mechanism between silane coupling agent and nano silicon dioxide in the process of in-situ preparation of nano silicon dioxide composite material was studied by sol-gel method. The effects of silane coupling agent dosages on the mechanism and the application performance of the nano silicon dioxide composite material in epoxy varnish were also investigated. The mechanism of preparing nano silicon dioxide composite material is that the organic group of silane coupling agent substitutes the physisorption water and silicon alcoholic group on the surface of the nano silicon dioxide and forms nano composite material with good dispersibility. When the dosage of silane coupling agent is suitable, the composite material exhibits a good application performance in epoxy varnish as well as reinforcing and toughening properties of nano materials. The preparation technology has a good application prospect.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2004年第2期70-75,共6页
Acta Materiae Compositae Sinica
基金
教育部科学技术研究重大项目(0202)
北京化工大学青年基金项目(QN0019)
可控化学反应科学与工程教育部重点实验室开放课题
关键词
溶胶-凝胶法
硅烷偶联剂
用量
纳米二氧化硅
复合材料
Chemical modification
Composite materials
In situ processing
Nanostructured materials
Silanes
Sol
gels
