北京林业大学学报2016，Vol.38Issue(11)：97-103,7.DOI:10.13332/j.1000-1522.20160095
酶解木质素接枝聚丙烯酸多孔水凝胶的制备及表征
Preparation and characterization of enzymatic hydrolysis lignin-based hydrogel
摘要
Abstract
In order to prepare a new type of high absorption resin with porous structure, enzymatic hydrolysis lignin-based composite hydrogel ( EHL-g-PAA ) was prepared by grafting using enzymatic hydrolysis lignin and acrylic acid. Free radicals of enzymatic hydrolysis lignin were formed by the system of Fe2 SO4/H2 O2;acrylic was performed with ammonium persulfate ( APS) as initiator and N,N’-methylene double acrylamide ( EMB) as crosslinking agent;EHL-g-PAA was prepared using the free radicals of enzymatic hydrolysis lignin and acrylic prepolymer. EHL-g-PAA was characterized by FTIR, SEM and TG, and the effects of mass ratio of enzymatic hydrolysis lignin and acrylic acid, pH value and temperature on the swelling properties of EHL-g-PAA were investigated. The results showed that the enzymatic hydrolysis of lignin had been successfully polymerized, and formed a new network structure of the enzymatic hydrolysis lignin-based hydrogel. Composite hydrogel had irregular hierarchical porous structure. When the mass ratio of EHL and AA was 0. 4:1 , the water equilibrium absorption ability of EHL-g-PAA reached the maximum. Under room temperature of 20 ℃, water equilibrium absorption ability of EHL-g-PAA was 410. 99 in distilled water, the adsorption equilibrium time extended 12 hrs, and its release rate to water was 93. 88%. EHL-g-PAA showed good pH sensitivity. The ability to absorb water was lower in acid and alkaline solutions, and it reached the highest in neutral condition. Under low temperature conditions, the network diastole and water absorbing capacity of EHL-g-PAA increased; while under high temperature conditions, the network shrinkage and water absorption capacity of EHL-g-PAA decreased. Compared with PAA, EHL-g-PAA had better circulation ability and stability.关键词
聚丙烯酸/酶解木质素/多孔水凝胶/糠醛渣Key words
poly acrylic acid/enzymatic hydrolysis lignin/porous hydrogel/furfural residue分类
农业科技引用本文复制引用
孙亚杰,马艳丽,代俊秀,任世学,方桂珍..酶解木质素接枝聚丙烯酸多孔水凝胶的制备及表征[J].北京林业大学学报,2016,38(11):97-103,7.基金项目
林业公益性行业科研专项(201304614)、中央高校基本科研业务费专项(DL13CB09)、黑龙江省自然科学基金青年项目(QC2014C011)、“十二五”国家科技支撑计划项目(2012BAD24B0403)。 （201304614）
