Proton conducting composite membranes based on sulfonated polysulfone and polysulfone-g-(phosphonated polystyrene) via controlled atom-transfer radical polymerization for fuel cell applications

Proton conducting composite membranes based on sulfonated polysulfone and polysulfone-g-(phosphonated polystyrene) via controlled atom-transfer radical polymerization for fuel cell applications

Polysulfone-g-(phosphonated polystyrene) (PPSF) is synthesized by grafting of poly(phosphonated polystyrene) to polysulfone (PSF) backbone via controlled atom-transfer radical polymerization (ATRP). And its comprehensive performances are improved by compositing with sulfonated polysulfone (SPSF). Th...

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Bibliographic Details
Published in:Solid state ionics Vol. 338; pp. 103 - 112
Main Authors: Yu, Lesi, Yue, Baohua, Yan, Liuming, Zhao, Hongbin, Zhang, Jiujun
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 01-10-2019
Elsevier BV
Subjects:
ATRP
Composite materials
Fuel cells
Membranes
PEMFC
Performance enhancement
Phosphonated polysulfone
Polymerization
Polystyrene
Polystyrene resins
Polysulfone resins
Protons
Sulfonated polysulfone
Swelling ratio
Thermal stability
PEMFC
Sulfonated polysulfone
Phosphonated polysulfone
ATRP
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Summary:Polysulfone-g-(phosphonated polystyrene) (PPSF) is synthesized by grafting of poly(phosphonated polystyrene) to polysulfone (PSF) backbone via controlled atom-transfer radical polymerization (ATRP). And its comprehensive performances are improved by compositing with sulfonated polysulfone (SPSF). The best comprehensive performances are achieved in the composite membrane consisting of 80 wt% PPSF and 20 wt% SPSF (P80S20). The maximum proton conductivity reaches 17.23 mS cm−1 at 95 °C and 90% RH, which is 3.3 times as high as the pristine PPSF at 5.22 mS cm−1. In addition, the composite membrane exhibits favorable thermal stability, compromised water uptake and swelling ratio, significantly improved mechanical strength. Moreover, the methanol permeability is reduced from 5.74 × 10−8 cm2 s−1 for PPSF to 0.96 × 10−8 cm2 s−1 for P80S20. [Display omitted] •PPSF graft copolymer is synthesized via atom transfer radical polymerization (ATRP).•PPSF/SPSF composite membrane is prepared and exhibits improved proton conductivity and other characteristics.•PPSF/SPSF composite membrane exhibits favorable thermal stability, compromised water uptake and improved mechanical strength.•PPSF/SPSF composite shows hydrogen bonding interactions between phosphonic and sulfonic groups.
ISSN:0167-2738
1872-7689
DOI:10.1016/j.ssi.2019.05.012