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Nanomaterials 2014, 4(1), 1-18; doi:10.3390/nano4010001
Article

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

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Received: 29 October 2013 / Revised: 13 December 2013 / Accepted: 13 December 2013 / Published: 23 December 2013
(This article belongs to the Special Issue Nanomaterials in Energy Conversion and Storage)
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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 cm1 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 300–800 nm within the membranes, which are believed to be the HPSU-rich area.
Keywords: membrane; fluoropolymer; polymer electrolyte; hyperbranched polysulfone; polymer blends membrane; fluoropolymer; polymer electrolyte; hyperbranched polysulfone; polymer blends
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Subianto, S.; Choudhury, N.R.; Dutta, N. Composite Electrolyte Membranes from Partially Fluorinated Polymer and Hyperbranched, Sulfonated Polysulfone. Nanomaterials 2014, 4, 1-18.

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