One-pot synthesis of proton-conductive inorganic-organic hybrid membranes from organoalkoxysilane and phosphonic acid derivatives

Tatsuo Hoshino, Koichiro Hayashi, Wataru Sakamoto, Toshinobu Yogo

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Inorganic-organic hybrid membranes consisting of an aliphatic main-chain polymer and Si-O linkages were synthesized via a simple one-pot process from an alkoxysilane derivative, methyl-substituted phenylvinylphosphonic acid, and phosphonic acid acrylate. (Methyldimethoxysilylmethyl)styrene (MDMSMS) was copolymerized with 3-methylphenylvinylphosphonic acid (CH 3 C 6 H 4 VPA, or MPVPA), and 2-hydroxyethyl methacrylate acid phosphate (HEMAP), and then hydrolyzed, yielding inorganic-organic hybrid composites. The formation of the inorganic-organic hybrid structure was confirmed by IR, 13 C, and 29 Si NMR spectroscopy. The membranes exhibited good thermal stability up to 180°C. The combination of aliphatic chains of the methacrylate derivative and Si-O networks in the hybrid membranes improved the mechanical properties of the membranes, enabling the construction of a membrane electrode assembly. The tensile modulus of the MDMSMS/MPVPA/HEMAP membrane with a composition of 1:1:5 was 688MPa. The conductivity of the 1:1:5 membranes was 4.1×10 -2 Scm -1 at 130°C and 100% relative humidity (RH), while it was 4.7×10 -4 Scm -1 at 130°C and 19.3% RH. The peak power of the 1:1:5 membrane was 4.8mW/cm 2 at 140°C and 30% RH. The cell utilizing the hybrid membrane was operated at 120°C and 30% RH for 24h without any drop in cell voltage.

Original languageEnglish
Pages (from-to)133-140
Number of pages8
JournalJournal of Membrane Science
Volume502
DOIs
Publication statusPublished - Mar 15 2016
Externally publishedYes

Fingerprint

Protons
membranes
Derivatives
Membranes
acids
protons
Acids
synthesis
Humidity
humidity
Atmospheric humidity
phosphates
Phosphates
hybrid composites
phosphonic acid
Styrene
hybrid structures
Methacrylates
Hybrid Cells
acrylates

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

Cite this

One-pot synthesis of proton-conductive inorganic-organic hybrid membranes from organoalkoxysilane and phosphonic acid derivatives. / Hoshino, Tatsuo; Hayashi, Koichiro; Sakamoto, Wataru; Yogo, Toshinobu.

In: Journal of Membrane Science, Vol. 502, 15.03.2016, p. 133-140.

Research output: Contribution to journalArticle

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abstract = "Inorganic-organic hybrid membranes consisting of an aliphatic main-chain polymer and Si-O linkages were synthesized via a simple one-pot process from an alkoxysilane derivative, methyl-substituted phenylvinylphosphonic acid, and phosphonic acid acrylate. (Methyldimethoxysilylmethyl)styrene (MDMSMS) was copolymerized with 3-methylphenylvinylphosphonic acid (CH 3 C 6 H 4 VPA, or MPVPA), and 2-hydroxyethyl methacrylate acid phosphate (HEMAP), and then hydrolyzed, yielding inorganic-organic hybrid composites. The formation of the inorganic-organic hybrid structure was confirmed by IR, 13 C, and 29 Si NMR spectroscopy. The membranes exhibited good thermal stability up to 180°C. The combination of aliphatic chains of the methacrylate derivative and Si-O networks in the hybrid membranes improved the mechanical properties of the membranes, enabling the construction of a membrane electrode assembly. The tensile modulus of the MDMSMS/MPVPA/HEMAP membrane with a composition of 1:1:5 was 688MPa. The conductivity of the 1:1:5 membranes was 4.1×10 -2 Scm -1 at 130°C and 100{\%} relative humidity (RH), while it was 4.7×10 -4 Scm -1 at 130°C and 19.3{\%} RH. The peak power of the 1:1:5 membrane was 4.8mW/cm 2 at 140°C and 30{\%} RH. The cell utilizing the hybrid membrane was operated at 120°C and 30{\%} RH for 24h without any drop in cell voltage.",
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