Council of Scientific and Industrial Research

Council of Scientific & Industrial Research an Indian Registered Body Incorporated Under the Registration of Societies Act (act Xxi of 1860)

Suresh Kumar Jewrajka

Pushpito Kumar Ghosh

Sreekumaran Thampy

Alamuru Venkata Rami Reddy

Soumya Haldar

Uma Chatterjee

Sadhika Khullar

Sanjay Mandal

The present invention relates to the preparation of novel anion exchange membranes from bicomponent or tricomponent copolymers containing both quaternizable and cross-linkable moieties. The bicomponent copolymers consisted with polyacrylonitrile and poly(2-dimethylaminoethyl) methacrylate and the tricomponent copolymers consisted with polyacryloniterle and poly2-dimethylaminoethyl) methacrylate and polyn-butyl acrylate. Quaternization of dimethyl amino groups of copolymer by methyl iodide followed by cross-linking of acrylonitrile groups of copolymer by hydrazine hydrate resulted anion exchange membrane with desired properties such as high ion exchange capacity (1.30-1.50 meqg), high transport number (0.92-0.93) for direct use in electrodyalysis unit. The tricomponent anion exchange membrane containing 32 wt % PDMA, 17 wt % PnBA, and 51 wt % PAN exhibited improved performance mainly in terms of low power consumption and high current efficiency during desalination of water.

Anion exchange membrane for electrodialysis applications and process for the preparation thereof

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Bhavnagar, India

Suresh Kumar Jewrajka