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Type: Journal article
Title: Separator membrane from crosslinked poly(vinyl alcohol) and poly(methyl vinyl ether-alt-maleic anhydride)
Author: Rohatgi, C.V.
Dutta, N.K.
Choudhury, N.R.
Citation: Nanomaterials, 2015; 5(2):398-414
Publisher: MDPI
Issue Date: 2015
ISSN: 2079-4991
Statement of
Charu Vashisth Rohatgi, Naba K. Dutta and Namita Roy Choudhury
Abstract: In this work, we report separator membranes from crosslinking of two polymers, such as poly vinyl alcohol (PVA) with an ionic polymer poly(methyl vinyl ether-alt-maleic anhydride) (PMVE-MA). Such interpolymer-networked systems were extensively used for biomedical and desalination applications but they were not examined for their potential use as membranes or separators for batteries. Therefore, the chemical interactions between these two polymers and the influence of such crosslinking on physicochemical properties of the membrane are systematically investigated through rheology and by critical gel point study. The hydrogen bonding and the chemical interaction between PMVE-MA and PVA resulted in highly cross-linked membranes. Effect of the molecular weight of PVA on the membrane properties was also examined. The developed membranes were extensively characterized by studying their physicochemical properties (water uptake, swelling ratio, and conductivity), thermal and electrochemical properties using differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), thermo-gravimetric analysis (TGA) and electrochemical impedance spectroscopy (EIS). The DSC study shows the presence of a single Tg in the membranes indicating compatibility of the two polymers in flexible and transparent films. The membranes show good stability and ion conductivity suitable for separator applications.
Keywords: Poly vinyl alcohol; separator membrane; ionic polymer; interpolymer-networked systems; battery separator; hydrogen bonding; electrochemical impedance spectroscopy; thermal analysis; dynamic mechanical analysis
Rights: © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (
DOI: 10.3390/nano5020398
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