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以离子液体1-烯丙基-3-甲基氯代咪唑([AMIM]Cl)为反应介质,采用丙烯酸为单体,过硫酸铵为引发剂,N,N’-亚甲基双丙烯酰胺为交联剂,利用接枝共聚方法合成纤维素-丙烯酸接枝共聚物。以轻液体石蜡为分散相,经反相悬浮过程将接枝物球化。通过正交实验法探索了最佳合成条件:单体的用量为4g/g CE,引发剂的用量为0.15g/g CE,交联剂的用量为0.05g/g CE,反应温度为60℃,反应时间为1.5h。采用傅里叶变换红外光谱(FT-IR)、透射电子显微镜(TEM)、热重分析仪对纤维素-丙烯酸接枝共聚物进行了表征。结果表明,聚合物微球对Cu2+离子有较好的吸附效果,最佳吸附量为198.6 mg/g。
Using ionic liquid 1-allyl-3-methylchlorimidazole ([AMIM] Cl) as the reaction medium, acrylic acid as monomer and ammonium persulfate as initiator, N, N’-methylenebisacrylamide As cross-linking agent, cellulose-acrylic acid graft copolymer was synthesized by graft copolymerization. With light liquid paraffin as disperse phase, the graft was spheroidized by reversed phase levitation. The optimum synthesis conditions were explored by orthogonal experiment: the amount of monomer was 4 g / g CE, the amount of initiator was 0.15 g / g CE, the amount of crosslinking agent was 0.05 g / g CE, the reaction temperature was 60 ℃ , The reaction time is 1.5h. The cellulose-acrylic acid graft copolymers were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM) and thermogravimetric analysis. The results show that the polymer microspheres have good adsorption effect on Cu2 + ions, and the optimum adsorption capacity is 198.6 mg / g.