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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)2S2O8、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)2 S2 O8)∶m(BMA)∶m(MBA)=1.0∶0.1∶4.0∶0.1,65℃,2 h。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。
The cellulose (cotton pulp) was dissolved in ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim] Cl) As the initiator, butyl methacrylate (BMA) as a monomer and N, N’-methylenebisacrylamide (MBA) as a crosslinking agent, a cellulose / BMA graft copolymer The structure and properties of the product were characterized by FTIR, SEM, XRD and TG. The effects of polymerization temperature and time, and amount of (NH4) 2S2O8, BMA and MBA on the grafting effect were investigated. The characterization results showed that the morphology of cellulose / BMA graft copolymer was amorphous, the crystallinity was obviously decreased and the thermal stability was improved. The experimental results showed that the optimal synthesis conditions of cellulose / BMA graft copolymer were: m (cellulose): m (NH4) 2 S2 O8): m : 0.1, 65 ° C, 2 h. Under this condition, the grafting rate can reach 94.5%, and the prepared cellulose / BMA graft copolymer has an absorption rate of 24.6 g / g.