膜科学与技术

燃料电池用季铵化壳聚糖/纤维素全互穿网络膜的制备及性能表征

作者：崔珺，王吉林，王璐璐，封瑞江

单位：辽宁石油化工大学化学化工与环境学部石油化工学院，辽宁抚顺 113001

关键词：季铵化壳聚糖；纤维素；阴离子交换膜；耐碱稳定性

出版年,卷(期):页码： 2016,36(6):78-85

摘要：

以季铵化壳聚糖（QCS）和纤维素（CM）为原料，戊二醛（GA）为交联剂，采用化学交联法制备具有全互穿网络结构的QCS/CM阴离子交换膜，并对其热稳定性、含水率、溶胀度、机械强度、电导率以及离子交换量等相关性能进行表征。结果表明，CM的引入提高了该膜的离子交换量、电导率以及机械强度。将QCS-CM35%置于10 mol•L-1 KOH（60℃）溶液中浸渍240 h，该膜的外观、机械性能以及含水率等指标，没有明显衰减，同时该膜30 ℃时的电导率从泡碱前的3.43×10-2 S•cm-1提高到4.60×10-2 S•cm-1，而70 ℃时的电导率从泡碱前的8.73×10-2 S•cm-1提高到1.009×10-1S•cm-1。表明该膜具有良好的耐碱性。

The full interpenetrating network anion exchange membranes were prepared based on quaternized- chitosan (QCS) and cellulose (CM) as materials and glutaraldehyde(GA) as crosslinkers. Thermal stabiit, water uptake, swelling ratio, mechanical properties, electrical conductivity and ion exchange capacity were all investigated in this research. The results show that the anionic conductivity, flexibility and mechanical property are highly improved by incorporating CM. No apparent decrease in anionic conductivity、water uptake and tensile stress was observed for the membranes after immersed in 10 mol•L-1 KOH (60℃) for 240 h. On the contrary, the anionic conductivity was increased from 3.43×10-2 S•cm-1 (0 h) to 4.60×10-2 S•cm-1 (240 h) and 8.73×10-2 S•cm-1(0h) to 1.009×10-1S•cm-1(240h) , which were measured at 30oC and 70oC. The results , indicating that the membranes with good alkaline resistance stability are promising for potential use in alkaline direct methanol fuel cells.

第一作者：崔珺（1988-），女（汉），河北武安人，辽宁石油化工大学在读硕士研究生，主要研究方向为聚合物电解质。E—mail：satosan@126.com

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