室温条件水性介质体系中用ATRP方法在纳米SiO_2表面接枝PGMA  

Controlled Grafting of Well-Defined PGMA at Silica Nanoparticles Surface by Surface-Initiated Aqueous ATRP at Ambient Temperature

作　　者：欧宝立[1,2] 李笃信[2] 

机构地区：[1]湖南科技大学化学化工学院,湖南湘潭411201 [2]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《实验室研究与探索》2009年第1期31-34,共4页Research and Exploration In Laboratory

基　　金：湖南省自然科学基金(06JJ20036);中南大学创新基金

摘　　要：用过量甲苯2,4-二异氰酸酯(TD I)对纳米SiO2表面进行修饰,进而用α-溴异丁基酰溴功能化纳米SiO2将原子转移自由基聚合(ATRP)引发剂引入到SiO2表面合成大分子引发剂;在室温条件水性介质体系中用ATRP技术将聚甲基丙烯酸缩水甘油酯(PGMA)接枝到SiO2表面。初步研究了SiO2大分子引发剂引发效率,利用红外光谱、透射电子显微镜等实验手段对表面接枝PGMA纳米SiO2进行了表征分析。Immobilization of the atom transfer radical polymerization(ATRP) initiator at the silica surface was achieved in three consecutive steps,including the surface modification with excess toluene-2,4-diisocynate(TDI).Controlled grafting of well-defined poly(glycidyl methacrylate)(PGMA) at silica nanoparticles surface was carried out via the surface-initiated ATRP at room temperature.Thus,PGMA/silica hybrid particles were prepared by ATRP from the α-bromoester functionalized silica surface.The initiation efficie...

关 键 词：纳米二氧化硅 表面修饰 甲基丙烯酸缩水甘油酯 原子转移自由基聚合 

分 类 号：O631.3[理学—高分子化学]