摘要
不饱和C=C双键表面修饰的一氧化硅粒子采用正硅酸乙酯和γ-甲基丙烯酰氧丙基三甲氧基硅烷（KH-570）共水解制备，然后加入甲基丙烯酸甲酯单体和引发剂原位聚合生成PMMA接枝改性二氧化硅溶胶。将该有机．无机复合溶胶旋转涂覆到金属基片（黄铜及不锈钢）上，经90～120℃热处理2h制备了复合涂层。采用傅立叶变换红外光谱、X-射线衍射、透射电镜表征了涂层结构和形貌，同时用激光光散射、铅笔硬度仪等对溶胶粒径和涂层性能进行了测试。结果表明该方法制备的PMMA-二氧化硅体系在一较宽的浓度范嗣内都能形成透明的稳定溶胶，接枝改性后的二氧化硅纳米粒子在聚合物中分散均匀，涂层机械强度明显提高，对金属基底具有良好的附着效果。
In this work, tetraethylorthosilicate （TEOS） and 7-methacryloxypropyltrimethoxysilane （KH-570） were co-hydrolyzed to form an unsaturated silica contained C=C double bond, and methyl methacrylate was added to obtain the crosslinked organic-inorganic hybrid sol. The composite solution was coated on a metal substrate （brass or stainless steel） by dipping, and sintered at 90-120 ℃ for 2 h. The coating structure was analyzed by FTIR spectrum analysis. Surface structure and particle diameter were characterized by TEM. Coating hardness was examined by a pencil-hardness instrument. Noncrystalline phase was probed by XRD. The experimental results demonstrate that silica can be crosslinked by methylmethacrylate in a wide concentration range with the aid of KH-570, and the coating of this organic-inorganic hybrid exhibits a uniform and compact surface with good performance in adherence and hardness.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第A02期84-86,共3页
Rare Metal Materials and Engineering
基金
Supported by Zhenjiang Province’s Program of Science and Technology Plan(2005C11044)
