聚甲基丙烯酸-g-壳聚糖膨润土复合材料的制备及其对阳离子染料的吸附性能  

Preparation of poly(methacrylic acid)-g-chitosan bentonite composite and its adsorption properties for cationic dyes

作　　者：杨武[1] 姚文双[1] 郭昊[1] FA Thelrahman 刘婧[1] 

机构地区：[1]西北师范大学化学化工学院,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2015年第3期64-71,共8页Journal of Northwest Normal University(Natural Science)

基　　金：国家自然科学基金资助项目(29875018)

摘　　要：以壳聚糖、甲基丙烯酸和膨润土为原料,过硫酸钾为引发剂,N,N′-亚甲基双丙烯酰胺为交联剂,经过接枝共聚反应制备了聚甲基丙烯酸-g-壳聚糖/膨润土纳米复合材料,并将其应用于阳离子染料结晶紫(CV)、亚甲基蓝(MB)及孔雀石绿(MG)的吸附,考察了吸附剂用量、时间、pH及初始浓度对吸附行为的影响.结果表明,制备的吸附剂对3种染料脱色率达96.5%以上,最大吸附量分别为151.74,341.2,122.6mg·g-1.吸附过程符合准二级吸附速率方程和Langmuir等温吸附模型.The poly （methacrylic acid ）‐g‐chitosan/bentonite composite is synthesized by free radical polymerization in aqueous solution using methacrylic acid , chitosan and benonite as raw materials , potassium persulfate as initiator , N ,N′‐methylene‐bis‐acrylamide as crosslinker , then , used to absorb cationic dyes ,such as crystal violet（CV） ,methylene bule（MB）and malachite green（MG） .Effects of the experimental conditions such as amount of absorbents , time , pH and initial concentration on the adsorption properties as well as thermodynamics and dynamics are also investigated . The results show that the removal rate of three dyes is above 96.5% and the maximum adsorption amounts are 151.74 ,341.2 and 122.6 mg·g-1 . The adsorption process is obeyed pseudo‐second‐order kinetics and Langmuir isotherm model .

关 键 词：壳聚糖 膨润土 复合材料 染料 吸附 

分 类 号：TQ324.8[化学工程—合成树脂塑料工业]