以离子液体1-丁基-3-甲基咪唑氯盐([Bmim]Cl)为溶剂溶解纤维素(棉浆粕),在纤维素/[Bmim]Cl均相溶液中,以(NH4)2S2O8为引发剂、甲基丙烯酸丁酯(BMA)为单体、N,N',-亚甲基双丙烯酰胺(MBA)为交联剂,采用自由基聚合法制备了纤维素/BMA接枝共聚物；采用FTIR,SEM,XRD,TG等手段对产物的结构和性能进行了表征；考察了聚合温度、时间以及(NH4)2 S2O8、BMA、MBA的用量对接枝效果的影响.表征结果显示,纤维素/BMA接枝共聚物形态呈非晶态的粒状,结晶度明显降低、热稳定性相对提高.实验结果表明,纤维素/BMA接枝共聚物的最佳合成条件为:m(纤维素)∶m((NH4)2S2O8)∶m(BMA)∶m(MBA)=1.0∶0.1∶4.0∶0.1,65℃,2h.在此条件下,接枝率可达94.5％,制备的纤维素/BMA接枝共聚物对水中二氯甲烷的吸收率达到了24.6 g/g.%Cellulose/butyl methacrylate ( BMA) graft copolymer was synthesized through radical polymerization with (NH4)2S2O8 as initiator, BMA as monomer and N,N'-methylene bisacrylamide (MBA) as cross linker in homogenous cellulose(cotton pulp)/l-butyl-3-methylimidazolium chloride ([Bmim]Cl) solution. The structure of the graft copolymer was characterized by means of FTIR, SEM and XRD , and its thermal property was analyzed by means of TG. The effects of the graft copolymerization conditions, namely temperature, reaction period, and dosages of (NH4) 2 S2 O8, BMA and MBA on the grafting ratio were investigated. The results showed that the morphology of the cellulose/BMA graft copolymer was granular rather than fibrous, its crystallinity decreased obviously and the thermal stability was improved compared to cellulose. Under the optimum copolymerization conditions: m(cellulose): m( (NH4)2S2O8) : m (BMA) : m (MBA) = 1.0 : 0. 1 : 4.0 : 0. 1, 65 ℃ ,2 h, the grafting ratio could be up to 94. 5% and the recovery capability of the cellulose/BMA graft copolymer for methylene dichloride in water could reach 24.6 g/g .
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