Composite Electrolyte Membranes from Partially Fluorinated Polymer and Hyperbranched, Sulfonated Polysulfone

Subianto, S, Choudhury, N and Dutta, N 2014, 'Composite Electrolyte Membranes from Partially Fluorinated Polymer and Hyperbranched, Sulfonated Polysulfone', Nanomaterials, vol. 4, no. 1, pp. 1-18.


Document type: Journal Article
Collection: Journal Articles

Title Composite Electrolyte Membranes from Partially Fluorinated Polymer and Hyperbranched, Sulfonated Polysulfone
Author(s) Subianto, S
Choudhury, N
Dutta, N
Year 2014
Journal name Nanomaterials
Volume number 4
Issue number 1
Start page 1
End page 18
Total pages 18
Publisher M D P I AG
Abstract Macromolecular modification of poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF) was done with various proportions of sulfonic acid terminated, hyperbranched polysulfone (HPSU) with a view to prepare ion conducting membranes. The PVDF-co-HFP was first chemically modified by dehydrofluorination and chlorosulfonation in order to make the membrane more hydrophilic as well as to introduce unsaturation, which would allow crosslinking of the PVDF-co-HFP matrix to improve the stability of the membrane. The modified samples were characterized for ion exchange capacity, morphology, and performance. The HPSU modified S-PVDF membrane shows good stability and ionic conductivity of 5.1 mS cm−1 at 80 °C and 100% RH for blends containing 20% HPSU, which is higher than the literature values for equivalent blend membranes using Nafion. SEM analysis of the blend membranes containing 15% or more HPSU shows the presence of spherical domains with a size range of 300800 nm within the membranes, which are believed to be the HPSU-rich area.
Subject Physical Chemistry of Materials
Biomaterials
Composite and Hybrid Materials
Keyword(s) membrane
fluoropolymer
polymer electrolyte
hyperbranched polysulfone
polymer blends
DOI - identifier 10.3390/nano4010001
Copyright notice © 2013 by the authors; licensee MDPI, Basel, Switzerland. This an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
ISSN 2079-4991
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