摘要
以稀硫酸和水玻璃沉淀法制备白炭黑为研究体系,用硅烷偶联剂KH570(γ-甲基丙烯酰氧丙基三甲氧基硅烷)对产物进行湿法改性,以提高它与聚合物的亲和性。通过红外光谱、热重和透射电镜等手段对白炭黑的结构及改性效果进行表征,结果显示,在以水作为介质的条件下,KH570成功接枝到纳米白炭黑表面,改性后的白炭黑粒子表面性质发生很大改变,团聚现象得到极大改善。研究表明,当改性剂用量为2.0%、溶液pH为4.7时,白炭黑粒子活化指数达到最大。
Silica was prepared from sulfuric acid and water glass by precipitation method with addition of KH570 （7-methacryloxypropyhrimethoxy silane） which was used to advance the affinity to polymer particles. The modification results and structure of silica were characterized by FT-IR,TG and TEM. The experiment showed that KH570 was success fully grafted to the surface of silica in water solution. After modification the nature of silica powders was greatly changed and the dispersion of silica was also significantly improved. The activation coefficient of silica reached highest when the content of KH570 was 2.0% and the pH of solution was 4.7.
出处
《化工新型材料》
CAS
CSCD
北大核心
2009年第3期103-105,共3页
New Chemical Materials
关键词
白炭黑
改性
偶联剂
表征
接枝
silica, modification, coupling agent,characterization,graft
