物理化学学报2011，Vol.27Issue(11)：2665-2670,6.
化学交联聚乙烯醇改性纤维素碱性阴离子交换复合膜的制备与性能
Synthesis and Properties of Chemically Cross-Linked Poly(vinyl alcohol) Modified Quaterized Hydroxyethylcellulose Ethoxylate as Novel Alkaline Anion-Exchange Membrane
摘要
Abstract
Much attention has been paid to alkaline ion-exchange membranes with high alkaline stability. In this work, chemically cross-linked poly(vinyl alcohol) modified quaterized hydroxyethylcellulose ethoxylate (PVA/QHECE) membranes were prepared and evaluated as OH-conducting polymer electrolytes. The membranes were characterized using Fourier transform infrared (FTIR) spectra, thermogravimetric (TG) analysis, and the alternating current (AC) impedance technique as for their inner structure, thermal stability, alkaline resistance stability, and OH" conductivity (a). The OH" conductivity of the membranes was investigated as a function of cross-linking time, the content of cross-linking agent, polymer composition, and water uptake. It was found that membrane swelling decreased with cross-linking time accompanied by an improvement in mechanical properties but no obvious decrease in OH" conductivity resulted from thereduced water uptake. The OH" conductivities in the range of 3.26><10~4-4.44x10'4 S-cnr1 were obtained at room temperature ((19 ±2) °C), depending on the different PVA/QHECE compositions. TG analysis showed that the PVA/QHECE membrane exhibited high thermal stability at up to 260 °C when the QHECE content was 42.9%. In addition, the membranes had a high alkaline stability without a loss of integrity and OH" conductivity after immersion in 6 mol ? L~1 KOH at 80 °C for 168 h.关键词
碱性阴离子交换膜/聚乙烯醇/季铵化羟乙基乙氧基纤维素/共混化学交联/OH-电导率/耐碱稳定性Key words
Alkaline anion-exchange membrane/ PVA/ QHECE/ Blending and chemical cross-linking/ OH~ conductivity/ Alkaline resistance stability分类
化学化工引用本文复制引用
刘玲玲,丁蕾,徐莉,乔锦丽,盛嘉伟..化学交联聚乙烯醇改性纤维素碱性阴离子交换复合膜的制备与性能[J].物理化学学报,2011,27(11):2665-2670,6.基金项目
国家自然科学基金(21173039),上海市浦江人才基金(08PJ14096),上海市自然科学基金(09ZR1433300),浙江省重中之重学科开放基金(20110927),教育部归国留学人员基金(2009(1001))和上海市重点学科项目(B604)资助项目 （21173039）
