摘要
通过以丙烯酸(AA),衣康酸(IA),马来酸酐(MA)为单体,N,N-亚甲基双丙烯酰胺(MBA)为交联剂,采用水溶液聚合制备了三元共聚P(AA/IA/MA)水凝胶,并采用FTIR对凝胶结构进行表征。针对不同组成凝胶的溶胀动力学、平衡吸附能力及铜离子饱和吸附容量的研究,结果表明:最佳投料比为n(AA):n(IA):n(MA)=6:3:1,其最大饱和吸附容量可达到224.5mg/g,P(AA/IA/MA)凝胶材料的等温吸附动力学可归属为准二级动力学。考察了体系pH值及吸附材料用量对Cu2+吸附性能的影响,结果表明:P(AA/IA/MA)凝胶吸附材料的Cu2+饱和吸附容量强烈依赖于体系pH值和吸附材料用量。当P(AA/IA/MA)凝胶吸附材料添加量为0.5g/50mL时,体系内Cu2+去除率接近100%。
Series of poly （acrylic acid-itaconic acid-maleic anhydride） hydrogel absorbents were synthesized by aque- ous solution copolymerization using N, N-Methylenesbisacrylamide as crosslinking agent and the structure of those were confirmed via FTIR. Moreover, based on the investigation of swelling kinetics, equilibrium swelling ratio and saturated Cu2＋ adsorption capacity of hydrogel absorbents, the optimal feed ratio of monomers was defined as n（AA） ：n（IA） ：n（MA） = 6 ： 3 ：1, in which the maximal saturated Cu2＋ adsorption capacity of hydrogel absorbent can be up to 224.5mg/g. Meanwhile, the results of investigation of Cu2＋ absorption properties of absorbent indicated that saturated Cu2＋ adsorption capacity of that strongly depended on the pH value and the adsorbent dose. And the absorption percentage to Cu2＋ of the absorbents could reach to 100% when the level of that was 0. 5 g/50 mL （the concentration of Cu2＋ was 1000m/L）. Finally,Pseudo- first order, pseudo-second order were analyzed and showed that the Cu2＋ adsorption followed pseudo-second order kinetics. Key words hydrogel, swelling kinetics, adsorption kinetics,Cu2＋ adsorption
出处
《化工新型材料》
CAS
CSCD
北大核心
2014年第3期166-168,共3页
New Chemical Materials
关键词
水凝胶
溶胀特性
吸附动力学
Cu2+吸附
hydrogel, swelling kinetics, adsorption kinetics, Cu2＋ adsorption
