Synthesis of titania nanoparticle-dispersed hybrid membranes from allyloxytitanium and phosphonic acid derivatives for fuel cell

Naoya Ozawa, Koichiro Hayashi, Wataru Sakamoto, Toshinobu Yogo

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Inorganic-organic hybrid membranes consisting of an aliphatic backbone and amorphous TiO 2 nanoparticles (NPs) were synthesized from tetraallyloxytitanium and phosphonic acid methacrylate via a simple copolymerization-hydrolysis method. Tetraallyoxytitanium (TAT) was copolymerized with 2-hydroxyethyl methacrylate acid phosphate (HEMAP), and then hydrolyzed, yielding inorganic-organic hybrid composites. IR and 13 C NMR spectroscopy confirmed the formation of the inorganic-organic hybrid structure. TEM and SAXS showed that amorphous TiO 2 NPs were dispersed in the polymer matrix. The membranes exhibited good thermal stability up to 180 °C. The aliphatic chains of the methacrylate derivative dispersed with TiO 2 NPs improved the mechanical properties of the membranes. The tensile modulus of the HEMAP/TAT membrane with a composition of 95:5 was 505 MPa. The conductivity of the 95:5 membranes was 4.1 × 10 -2 S cm -1 at 130 °C and 100% relative humidity (RH), while it was 4.7 × 10 -4 S cm -1 at 130 °C and 19.3% RH. The peak power of the 95:5 membrane was 4.8 mW/cm 2 at 140 °C and 30% RH. The cell utilizing the hybrid membrane was operated at 140 °C and 30% RH for 72 h without any drop in cell voltage.

Original languageEnglish
Pages (from-to)221-228
Number of pages8
JournalJournal of Membrane Science
Volume563
DOIs
Publication statusPublished - Oct 1 2018
Externally publishedYes

Fingerprint

Nanoparticles
fuel cells
Fuel cells
titanium
Titanium
membranes
Derivatives
Membranes
nanoparticles
acids
Acids
Humidity
synthesis
humidity
Atmospheric humidity
Methacrylates
phosphates
Phosphates
hybrid composites
hybrid structures

All Science Journal Classification (ASJC) codes

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

Cite this

Synthesis of titania nanoparticle-dispersed hybrid membranes from allyloxytitanium and phosphonic acid derivatives for fuel cell. / Ozawa, Naoya; Hayashi, Koichiro; Sakamoto, Wataru; Yogo, Toshinobu.

In: Journal of Membrane Science, Vol. 563, 01.10.2018, p. 221-228.

Research output: Contribution to journalArticle

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