A safer route for preparation of anion exchange membrane from inter-polymer film and performance evaluation in electrodialytic application

作者：Sharma Saroj^*; Dinda Milan; Sharma Chirag R; Ghosh Pushpito K

来源：Journal of Membrane Science, 2014, 459: 122-131.

DOI：10.1016/j.memsci.2014.02.011

• Inter-polymer anion exchange membrane
• Green process
• Benzylic bromination
• High transport number
• Electrodialytic desalination

The present article describes a greener route to inter polymer anion exchange membranes (AEMs) utilizing p-methylstyrene-co-divinylbenzene (p-MS-co-DVB) in place of styrene-co-divinylbenzene (Sty-co-DVB). Polyvinyl chloride (PVC) and polyethylene (PE) were used as binders and films were prepared from the inter-polymers by solution casting and melt extrusion processes, respectively. Functionalization of the films was effected through benzylic mono-bromination Followed by quaternization with trimethylamine. This alternative procedure dispensed with the use of chloromethyl ether (CME) which was required for functionalization of styrene-co-DVB-based polymer films. CME is a carcinogen that is hazardous to health. The AEMs were characterized by Fourier transform infrared spectroscopy, solid-state C-13-nuclear magnetic resonance and scanning electron microscopy, as well as by measurements of ion-exchange capacity, water uptake, mechanical properties (stress-strain curve), and electrical properties such as ionic resistance and transport number. The p-MS-co-DVB/PE AEM, exhibited high transport number (0.95 by the EMF method; NaCl electrolyte) and the electrodialytic desalination efficiency exceeded that of the Sty-co-DVB/PE interpolymer AEM prepared previously. It also exhibited excellent mechanical strength and stability.

• 出版日期2014-6-1
• 单位海洋化工研究院有限公司