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Composite Electrolyte Membranes from Partially Fluorinated Polymer and Hyperbranched, Sulfonated Polysulfone
Ian Wark Research Institute, University of South Australia, Mawson Lakes Campus, 5095 Adelaide, Australia
* Author to whom correspondence should be addressed.
Received: 29 October 2013; in revised form: 13 December 2013 / Accepted: 13 December 2013 / Published: 23 December 2013
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 300–800 nm within the membranes, which are believed to be the HPSU-rich area.
Keywords: membrane; fluoropolymer; polymer electrolyte; hyperbranched polysulfone; polymer blends
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MDPI and ACS Style
Subianto, S.; Choudhury, N.R.; Dutta, N. Composite Electrolyte Membranes from Partially Fluorinated Polymer and Hyperbranched, Sulfonated Polysulfone. Nanomaterials 2014, 4, 1-18.
Subianto S, Choudhury NR, Dutta N. Composite Electrolyte Membranes from Partially Fluorinated Polymer and Hyperbranched, Sulfonated Polysulfone. Nanomaterials. 2014; 4(1):1-18.
Subianto, Surya; Choudhury, Namita R.; Dutta, Naba. 2014. "Composite Electrolyte Membranes from Partially Fluorinated Polymer and Hyperbranched, Sulfonated Polysulfone." Nanomaterials 4, no. 1: 1-18.