摘要
采用溶胶 凝胶法制备纳米SiO2,并用硅烷偶联剂作为改性剂和有机相,对其进行原位改性,制备无机有机复合材料。着重研究了改性的SiO2对环氧有机硅涂料性能的影响。实验结果表明,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,可生成改性完全并分散均匀的纳米二氧化硅复合材料。当硅烷偶联剂的用量适当时,该复合材料在环氧有机硅树脂清漆中具有良好的应用性能,可提高涂层的耐热性,同时表现出即增强又增韧的特性,显示出纳米效应。该涂料配以其它亚微米级的陶瓷粉,利用各种粉体之间的协同作用,可形成非常致密的涂层。该涂层具有良好的耐蚀性、热稳定和优异的物理机械性能。
NM SiO2 is prepared by sol-gel technique and is in-situ modified by silane coupling agent which is used as modifying agent and organic phase and get an inorganic-organic composite material.We focused on the influence of modified nm SiO2 on the property of the epoxy-modified silicone coating.The results indicate that physical absorption water and silane hydroxy on the surface of nm SiO2 are substituded by organic group of silane coupling agent and get fully modified and uniformly dispersed nm SiO2 composite material.The composite material has excellent performance used in the epoxy-modified silicone resin varnish ,when the quantity of silane coupling agent is proper. It can not only enhance heat-resisting of coating ,reinforce and toughen the epoxy-modified silicone resin but also show millicron effect. The solidifying film which has good anti-corrosive ,thermal stability and excellent comprehensive physical and mechanism performance can be gotten by the coating mixed with other submicrosize ceramic powder and use the synergistic action of several ceramic powder and the right PVC of pigment.
出处
《表面技术》
EI
CAS
CSCD
北大核心
2003年第6期59-62,共4页
Surface Technology
