摘要
利用表面修饰法合成了常用单体甲基丙烯酸缩水甘油酯(GMA)修饰的TiO2纳米粒子。以甲基丙烯酸甲酯(MMA)为单体,S-1-十二烷基-S′-(α,α′-二甲基-α″-乙酸)三硫代碳酸酯(DDACT)为RAFT试剂,在纳米TiO2表面进行可逆加成-断裂链转移(RAFT)接枝聚合,PMMA"经表面接枝到(grafting through)"改性后的纳米TiO2表面。结果表明,随聚合时间的增加,纳米TiO2表面接枝聚合物PMMA的量增加,颗粒的团聚得到明显减缓。
The surface of titania (TiO2 ) nanoparticles is modified by a functional agent glycidyl methacrylate (GMA) to form GMA modified TiO2 particles. The reversible addition-fragmentation chain transfer (RAFT) polymerization of methyl methacrylate (MMA) and GMA modified TiO2 is initiated by 2,2′-azobis (isobutyronitrile) (AIBN) in the presence of the RAFT agent S-1-dodecyl-S′-(α,α′-dimethyl-α″-acetic acid) trithiocarbonate (DDACT). PMMA is grafted "through" the surface of the GMA modified TiO2 nanoparticles. The results show that the amount of PMMA grafted onto the surface of TiO2 increases with the polymerization time and the aggregation of TiO2 nanoparticles is greatly reduced.
出处
《现代化工》
CAS
CSCD
北大核心
2011年第4期41-44,共4页
Modern Chemical Industry