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.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
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~~
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
graphene
polystyrene
atom transfer nitroxide radical coupling reaction
chemical functionali-zation
