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Block copolymers combining semi-fluorinated poly(arylene ether) and sulfonated poly(arylene ether sulfone) segments for proton exchange membranes

In English

Författare

Summary, in English

A series of aromatic multiblock copolymers based on alternating segments of hydrophilic sulfonated polysulfone (PSU) and hydrophobic polyfluoroether (PFE) were prepared and characterized as proton exchange membranes. PSU precursor blocks were synthesized by polycondensation of dichlorodiphenylsulfone and resorcinol, and PFE precursor blocks were prepared by combining decafluorobiphenyl and isopropylidenediphenol. After preparation of the multiblock copolymers via a mild coupling reaction of the precursor blocks, the resorcinol units of the PSU blocks were selectively and virtually completely sulfonated under mild reaction conditions using trimethylsilylchlorosulfonate. Transparent and robust membranes with different PSU-PFE copolymer compositions and ion-exchange capacities were cast from solution. Atomic force microscopy of the membranes revealed a distinct nanophase separated morphology. At 80 oC, the proton conductivity reached 10 mS cm-1 under 65% relative humidity and 100 mS cm-1 under fully hydrated conditions.

Publiceringsår

2014

Språk

Engelska

Sidor

15718-15727

Publikation/Tidskrift/Serie

International Journal of Hydrogen Energy

Volym

39

Issue

28

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Chemical Sciences

Nyckelord

  • Sulfonation
  • Ionomer
  • Aromatic block copolymer
  • Polymer electrolyte membrane
  • Fuel cell
  • Proton conductivity

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1879-3487