Preparation and characterization of crosslinked proton conducting membranes based on chitosan and PSSA-MA copolymer

Jin Ah Seo, Joo Hwan Koh, Dong Kyu Roh, Jong Hak Kim

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Proton conducting crosslinked complex membranes were prepared by blending of a cationic polyelectrolyte, i.e. chitosan (CS) and an anionic polyelectrolyte, i.e. poly(4-styrenesulfonic acid-co-maleic acid) (PSSA-MA). In particular, the dual function of PSSA-MA as a crosslinker and a proton conductor is described. The esterification reaction between -OH of CS and -COOH of PSSA-MA and the complex formation of NH3+ of CS and SO3- of PSSA-MA were confirmed using FT-IR spectroscopy. The ion exchange capacity (IEC) of membranes continuously increased with PSSA-MA concentrations, resulting from the increase of ionic groups. However, the membranes exhibited the minimum values of proton conductivity and water uptake at 50-67 wt.% of PSSA-MA due to the effect of crosslinking and complex formation. In addition, a maximum of Young's modulus was achieved at 50 wt.% of PSSA-MA, as revealed by universal testing machine (UTM). Thermogravimetric analysis (TGA) showed that the thermal stability of membranes increased with increasing PSSA-MA concentrations and was the highest at 50 wt.% of PSSA-MA.

Original languageEnglish
Pages (from-to)998-1002
Number of pages5
JournalSolid State Ionics
Volume180
Issue number14-16
DOIs
Publication statusPublished - 2009 Jun 25

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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