Cu催化的单电子转移活性自由基聚合制备石墨烯/聚N,N-二甲基丙烯酰胺复合体系  

Preparation of Graphene/Poly(N,N-dimethylacrylamide) Nanocomposite via Cu-Catalyzed Single-Electron Transfer Living Radical Polymerization

作　　者：王凇旸[1] 郭冠南[1] 杨东[1] 胡建华[1] 

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

出　　处：《有机化学》2014年第7期1382-1390,共9页Chinese Journal of Organic Chemistry

基　　金：国家自然科学基金(Nos.51073042;51103026;51373035;51373040);上海市自然科学基金(No.11ZR1403100);上海科技创新行动计划(No.11JC1400600);上海市启明星计划(No.12QB1402900)资助项目~~

摘　　要：以天然石墨为起始原料,采用改进的Hummer方法,通过强酸氧化水解和超声分散制备了氧化石墨烯,然后通过肼还原和重氮化反应得到含有羟基的石墨烯(G-OH),再通过酯化反应在石墨烯表面上引入了α-氯代羰基,从而得到了含有单电子转移活性自由基聚合(SET-LRP)引发基团的石墨烯(G-Cl).最后,在石墨烯表面原位引发N,N-二甲基丙烯酰胺(DMAA)单体的SET-LRP聚合,得到了G-PDMAA复合材料,G-PDMAA在常规的有机溶剂和水中具有良好的分散性.Exfoliated graphene oxide （GO） sheets were prepared from natural graphite by a modified Hturlmer＇s method, which included oxidative hydrolysis under strong acidic conditions and ultrasonic dispersing. GO was firstly reduced by hydrazine and then followed by a diazonium addition reaction to give graphene containing hydroxyls （G-OH）, which was converted to graphene with singel eclectron transfer-living radical polymerization （SET-LRP） initiating groups via esterification with 2-chloropropionyl chloride. Finally, poly（N,N-dimethylacrylamide） （PDMAA） chains were grown from the surface of graphene via in situ SET-LRP to obtain graphene/PDMAA （G-PDMAA） nanocomposite. G-PDMAA nanocomposite showed good dispersity in common organic solvents and aqueous solution.

关 键 词：石墨烯 氧化石墨烯 N N-二甲基丙烯酰胺 单电子转移活性自由基聚合(SET-LRP) 

分 类 号：O631.5[理学—高分子化学]