原子转移氮氧自由基偶合反应制备聚苯乙烯改性的石墨烯  

Preparation of Polystyrene Functionalized Graphene by Atom Transfer Nitroxide Radical Coupling Reaction

作　　者：陈小乙[1,2] 石远琳[1] 杨东[1] 胡建华[1] 杨芃原[2] 

机构地区：[1]聚合物分子工程国家重点实验室复旦大学高分子科学系,上海200433 [2]复旦大学化学系,上海200433

出　　处：《化学学报》2012年第7期817-821,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.50873029;51073042;51103026);上海科技创新行动计划(No.11JC1400600);上海市自然科学基金(No.11ZR1403100);高等学校博士学科点专项科研基金(No.20110071120006)资助项目~~

摘　　要：通过原子转移氮氧自由基偶合(ATNRC)反应制备了聚苯乙烯改性的石墨烯.先将氧化石墨烯酰氯化,然后与2,2,6,6-四甲基-4-羟基哌啶-1-氧自由基(HTEMPO)进行酯化反应制备HTEMPO修饰的石墨烯(Graphene-HTEMPO),通过Graphene-HTEMPO与原子转移自由基聚合(ATRP)方法制备的Br封端的聚苯乙烯进行ATNRC反应,即可得到聚苯乙烯共价改性的石墨烯(Graphene-g-PS).热失重分析结果表明聚苯乙烯的接枝率约为6.68 wt%,从透射电镜照片中也可以明显地看到石墨烯表面的聚苯乙烯.由于聚苯乙烯的共价接枝,使得Graphene-g-PS在氯仿、正己烷、甲苯、甲醇等有机溶剂中具有很好的分散性,有利于石墨烯的进一步应用.Polystyrene functionalized graphene was prepared by atom transfer nitroxide radical coupling （ATNRC） reaction. Graphene oxide was first reacted with thionyl chloride, followed by esterification with 4-hydroxy-2,2,6,6-tetramethyl-piperidinyl-1-oxyl （HTEMPO） to prepare HTEMPO functionalized graphene （Graphene-HTEMPO）. Then, Graphene-HTEMPO was coupled with Br-end-capping polystyrene prepared by atom transfer radical polymerization （ATRP） via ATNRC reaction to obtain polystyrene covalently func- tionalized graphene （Graphene-g-PS）. The thermogravimetric analysis result showed that the graft ratio of PS was 6.68 wt%. The PS on the surface of graphene could be obviously observed from the TEM image. Because of the covalent graft of PS, Graphene-g-PS showed good dispersibility in chloroform, hexane, tolu- ene, methanol, etc., which is favorable to the further application of graphene.

关 键 词：石墨烯 聚苯乙烯 原子转移氮氧自由基偶合反应 化学改性 

分 类 号：O613.71[理学—无机化学]