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以纤维素为原料,对其进行接枝共聚、磺甲基化改性,随后,以改性纤维素为载体,苦参碱为模板分子,戊二醛为交联剂,制备纤维素基苦参碱分子印迹吸附材料。利用FT-IR、SEM和GPC对印迹吸附材料进行了表征,探讨聚合物制备过程中各因素的影响。结果表明,所得的纤维素接枝共聚物的分子量及分子量分布表明该聚合反应是活性可控的。红外分析显示,通过磺甲基化改性,纤维素丙烯酰胺接枝共聚物(Cell-g-PAM)上的酰胺基特征峰减弱,出现了磺酸基特征峰。表面印迹改性后,纤维素基分子印迹吸附剂(MIP-SPAM)表面呈多孔状态,有利于吸附,印迹后吸附材料对400mg/L的苦参碱的在2h时间内吸附容量可达73.064mg/g,吸附速度及吸附容量明显高于非印迹纤维素改性材料。
Using cellulose as raw material, graft copolymerization and sulfomethylation of cellulose were carried out. Subsequently, modified cellulose was used as carrier, matrine was used as template molecule and glutaraldehyde was used as crosslinking agent to prepare cellulose-based bitterness Alkali molecular imprinting material. The imprinted adsorbents were characterized by FT-IR, SEM and GPC, and the influence of various factors on the polymer preparation was discussed. The results show that the molecular weight and molecular weight distribution of the obtained cellulose graft copolymer show that the polymerization reaction is activity controllable. Infrared analysis showed that the characteristic peak of amide group on cellulose-acrylamide graft copolymer (Cell-g-PAM) was weakened by sulfomethylation, and the sulfonic acid group characteristic peak appeared. After the surface imprinting modification, the surface of cellulose-based molecularly imprinted adsorbent (MIP-SPAM) was porous, which was in favor of adsorption. The adsorption capacity of adsorbed material on 400mg / L matrine in 2h was 73.064mg / g, adsorption speed and adsorption capacity were significantly higher than non-imprinted cellulose modified material.