中文摘要：

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-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。

英文摘要：

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.