Structure manufacturing of proton-conducting organic-inorganic hybrid silicophosphite membranes by solventless synthesis

Yomei Tokuda, Satoshi Oku, Teppei Yamada, Masahide Takahashi, Toshinobu Yoko, Hiroshi Kitagawa, Yoshikatsu Ueda

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

We have developed a new class of proton-conducting organic-inorganic hybrid silicophosphite membranes, produced by ethanol condensation of organically modified alkoxysilanes and anhydrous vinylphosphonic acid under solventless, catalyst-free, low-temperature, one-pot conditions. The membranes synthesized in this study are crack-free, large, and flexible, and they exhibit good thermal stability up to intermediate temperatures (∼218 °C). Structural analyses using 29Si and 31P nuclear magnetic resonance spectroscopy and infrared measurements revealed that ethanol condensation produced an inorganic alternating copolymer structure, Si-O-P, with a phosphole group, and successive polymerization between vinyl and/or methacryl groups enabled these structures to connect with each other. In this way, it is possible to achieve structure manufacturing of inorganic-organic networks. The proton conductivities of the hybrids are as high as 5.2 × 10-3 S/cm at 85 °C under 80% relative humidity.

Original languageEnglish
Pages (from-to)796-803
Number of pages8
JournalJournal of Materials Research
Volume26
Issue number6
DOIs
Publication statusPublished - Mar 28 2011

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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