不同金属离子改性CMC-PVA/CS-PVA双极膜的研究  

Study on CMC-PVA/CS-PVA Bipolar Membrane Modified by the Different Metal Ions

作　　者：周挺进[1] 黄娟[2] 陈利金[1] 陈日耀[1] 陈晓[1] 郑曦[1] 陈震[1] 

机构地区：[1]福建师范大学环境科学与工程学院,福建福州350108 [2]福建师范大学化学化工学院,福建福州350108

出　　处：《福建师范大学学报（自然科学版）》2012年第6期81-86,共6页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省自然科学基金资助项目(2010J01028);福建省科技厅重点资助项目(2012H0019)

摘　　要：分别用Fe3+、Cr3+和Ca2+对羧甲基纤维素钠(CMC)-聚乙烯醇(PVA)阳膜层进行改性,制备了Me-CMC-PVA/CS-PVA双极膜(双极膜简记为BPM,CS为壳聚糖,Me=Fe3+,Cr3+或Ca2+).研究表明,Fe-CMC-PVA阳膜亲水性强于以Cr3+或Ca2+改性的CMC-PVA阳膜,相应地,Fe-CMC-PVA/CS-PVABPM中间界面层水解离能力也较强,膜IR降和槽电压也较低.此外,Fe-CMC-PVA/CS-PVA BPM的机械性能、热稳定性也较好,其在水和酸、碱溶液中的溶胀度也较低,有效地提高了双极膜的性能.The carboxymethyl cellulose （CMC）-polyvinyl alcohol （PVA） cation exchange membrane was modified by Fe3＋, Cr3＋ and Ca2＋ respectively to prepare Me-CMC-PVA/CS- PVA bipolar membrane （BPM, CS： chitosan, Me=Fe3＋, Cr3＋ or Ca2＋）. The experimental results showed that the hydrophilicity of Fe-CMC-PVA membrane was stronger than that of CMC-PVA membrane modified by Cr3＋ or Ca2＋. Correspondingly, the water splitting effi- ciency at the interlayer of Fe-CMC-PVA/CS-PVA BPM was higher, and its IR drop and cell voltage were lower. In addition, the thermal stability and mechanical properties of the Fe- CMC-PVA/CS-PVA BPM were better, and its swelling degree was smaller in water, acid and alkali solution, the performance of the BPM was improved.

关 键 词：双极膜 金属离子 水解离 改性 

分 类 号：O631[理学—高分子化学]