Proton conductive organic-inorganic membranes were synthesized based on acrylic monomers and silica inorganic component, derived as a result of sol-gel transformation of precursor-3-methacryloxypropyltrimethoxysilane (MAPTMS). Kinetics of polymerization in situ was investigated by laser interferometry. Membranes characterization includes water and methanol uptake, contact angle and proton conductivity at different temperatures. Activation energy values for proton conductivity in prepared membranes were evaluated. The obtained hybrid membranes demonstrated high proton conductivity making them attractive for the use in fuel cells.
Organic-inorganic membranes were successfully synthesized by UV-initiated polymerization of acrylic monomers with simultaneous formation of inorganic component via sol-gel process of 3methacryloxypropyltrimethoxysilane (MSPTMS)-based system. The investigations of membrane characteristics indicate that materials possess high proton conductivity, thermal and chemical stability and are good candidates for fuel cell application.
The series of membranes were prepared by UV-initiated polymerization of acrylic monomers (acrylonitrile AN, acrylic acid AA and potassium 3-sulfopropylacrylate SPAK) at the presence of photoinitiator (2,2-dimethoxy-2-phenylacetophenone (DMPA)) and cross-linker ethyleneglycole dimethacrylate (EGDMA), and simultaneous sol-gel process in TEOS-based sol-gel system. Characterization of the obtained nanocomposites includes measurements of proton conductivity, thermal behaviuor, water/methanol uptake, free surface energy. The synthesized membranes have high proton conductivity (10-2 Sm/cm) and other properties allowing to consider them as promising candidates for fuel cell application.
Proton conductive cross-linked membranes (polyacrylate copolymer and polyacrylate-silica nanocomposites) were synthesized by UV initiated polymerization in situ. Proton conductivity of membranes, investigated by impedance spectrometry, was found to be sufficiently high. Contact angle measurements allow to estimate free surface energy of synthesized membranes. The membranes also exhibit good thermal stability.
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