摘要
采用乳液聚合方法,使甲基丙烯酸甲酯在钛酸钾晶须表面聚合,获得了表面包覆聚甲基丙烯酸甲酯的PMMA/K2O6TiO2复合粒子.考察了反应时间、引发剂浓度、单体浓度和温度对晶须增重率和单体转化率的影响.通过TGA和SEM手段对钛酸钾晶须进行了表征.测量了水对改性前、后晶须的动态润湿性变化,结果表明,改性后的钛酸钾晶须由亲水性向亲油性转变.
This paper presented a method for modifying potassium titanate whiskers (K2O6TiO2) to obtain polymethyl methacrylate (PMMA)/K2O?TiO2 composite particles through emulsion polymerization. The effects of reaction time, initiator concentration, monomer concentration and reaction temperature on the efficiency of conversion or percentage of weight gain were investigated in details. The optimal conditions to reach high conversion efficiency were found. According to the characterization of TGA and SEM, the potassium titanate whiskers were modified through covering PMMA on their surfaces. The characterization of dynamic wetting capacity showed that K2O6TiO2 was modified from hydrophilic to hydrophobic states.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2005年第1期70-73,共4页
The Chinese Journal of Process Engineering
基金
国家杰出青年科学基金资助项目(编号:29925616)
国家自然科学重点基金资助项目(编号:20236010)
国家自然科学基金资助项目(编号:20246002)
863计划资助项目(编号:2003AA333010)
关键词
钛酸钾晶须
表面改性
聚甲基丙烯酸甲酯
乳液聚合
potassium titanate whiskers
surface modification
polymethyl methacrylate
emulsion polymerization
