新型β-环糊精交联聚合物的制备及其吸附亚甲基蓝性能的研究  

Preparation of Maleamic Acid Crosslinked β-Cyclodextrin Polymer and Its Application in Adsorption of Methylene Blue

作　　者：李宏占[1] 马超[1] 张晓梅[1] 徐国财[1] 陈超越[1] 

机构地区：[1]安徽理工大学化学工程学院,安徽淮南232001

出　　处：《石油化工》2012年第12期1424-1428,共5页Petrochemical Technology

基　　金：安徽省教育厅重点项目(KJ2011A091)

摘　　要：以马来酸酐和乙二胺乃原料制备了马来酰胺酸,再将马来酰胺酸与β-环糊精进行交联聚合得到马来酰胺酸交联β-环糊精聚合物(PMCD)。采用FTIR方法对PMCD的结构进行了分析。表征结果显示,PMCD中含有预期的官能团。研究了亚甲基蓝(MB)的初始质量浓度、温度和溶液pH等吸附条件对PMCD吸附MB性能的影响。实验结果表明、PMCD对MB的吸附量随MB初始质量浓度的增大而增大;温度升高有利于PMCD吸附MB;在溶液pH=2～7时,PMCD对MB的吸附量随溶液pH的增大而增大;当pH>7时,吸附量基本不变。探讨了PMCD对MB的吸附动力学和等温吸附模型,PMCD吸附MB的动力学数据符合拟二级动力学模型和Langmuir吸附等温模型,为单分子层吸附。Maleamic acid crosslinked β-cyclodextrin polymer（PMCD） was synthesized by cross-linking β-cyclodextrin with maleamic acid which was prepared from maleic anhydride and ethylenediamine. The structure of PMCD was characterized by means of FTIR. The result shows that there are expected functional groups in PMCD. The effects of the initial mass concentration of methylene blue（MB）, temperature and solution pH on the performance of PMCD adsorbing MB were investigated. The results indicate that the adsorption capacity of PMCD to MB increased with the increase of the initial mass concentration of MB. High temperature is favorable for PMCD adsorbing MB. When the solution pH is 2-7, the adsorption capacity of PMCD increases with increasing pH. When the solution pH value is greater than 7, the absorption capacity of PMCA basically keeps constant. The absorption kinetics and isothermal adsorption models of PMCD adsorbing MB were also studied. The kinetic data for PMCD adsorbing MB are in accordance with pseudo-second-order kinetic model and Langmuir isothermal model.

关 键 词：Β-环糊精交联聚合物 马来酰胺酸 吸附 亚甲基蓝 

分 类 号：TQ424.3[化学工程]