PAMPSLi-CMC/CS双极膜的制备与表征

Preparation and Characterization of PAMPSLi-CMC/CS Bipolar Membrane

将聚(2-丙烯酰胺-2-甲基丙磺酸锂)(PAMPSLi)与羧甲基纤维素钠(CMC)共混制备了PAMPSLi-羧甲基纤维素钠/壳聚糖(CS)双极膜(BPM).实验结果表明,在CMC阳膜层中添加PAMPSLi可提高其离子交换容量和氢离子渗透性能.与CMC/CS双极膜相比,PAMPSLi-CMC/CS双极膜的电阻压降(IR降)和溶胀度均降低.当PAMPSLi的添加量为4%,电流密度为105mA.cm-2时,PAMPSLi-CMC/CS双极膜的IR降为2.0V.

The carboxymethyl cellulose （CMC） cation exchange membrane was modified by poly （2-acrylamide-2-methylpropanesulfonic acid lithium） （PAMPSLi） to prepare the PAMPSLi-carboxymethyl cellulose/chitosan （CS） bipolar membrane （BPM）. The resultsshowed that the ion exchange capacity and hydrogen ion transmigration rate of the PAMP- SLi-CMC cation exchange membrane were increased. In comparison with the CMC/CS BPM, both the IR drop and the swelling degree of the PAMPSLi-CMC/CS BPM were de-creased. When the addition amount of PAMPSLi was 4%, the IR drop of the PAMPSLi- CMC/CS BPM was 2.0 V at the high current density of 105 mA · cm^-2.