Ion exchange membranes based on vinylphosphonic acid-co-acrylonitrile copolymers for fuel cells

0450857 - ÚMCH 2016 RIV US eng J - Článek v odborném periodiku
Žitka, Jan - Bleha, Miroslav - Schauer, Jan - Galajdová, Barbora - Paidar, M. - Hnát, J. - Bouzek, K.
Ion exchange membranes based on vinylphosphonic acid-co-acrylonitrile copolymers for fuel cells.
Desalination and Water Treatment. Roč. 56, č. 12 (2015), s. 3167-3173. ISSN 1944-3994. E-ISSN 1944-3986.
[International Conference on Membrane and Electromembrane Processes - MELPRO 2014. Prague, 18.05.2014-21.05.2014]
Grant CEP: GA ČR(CZ) GPP106/12/P643
GRANT EU: European Commission(XE) 608931 - MAT4BAT
Institucionální podpora: RVO:61389013
Klíčová slova: vinylphosphonic acid * poly(vinylphosphonic acid-co-acrylonitrile) * ionic conductivity
Kód oboru RIV: CD - Makromolekulární chemie
Impakt faktor: 1.272, rok: 2015

Poly(vinylphosphonic acid-co-acrylonitrile) with various concentrations of vinylphosphonic acid polymer units were prepared by free radical solution polymerization. The membranes were prepared by casting polymer solutions in N,N′-dimethylformamide and evaporating the solvent. Thermogravimetric analysis showed the stability of prepared membranes up to 175°C, and membranes were stable in oxidative Fenton reagent for 1 h at 70°C. The membranes of polymers containing more than 16 mol% of units with phosphonic acid group swelled excessively in water. The ionic conductivity of membranes increased with the increasing concentration of polymer units with a phosphonic acid group in the polymer chain and with temperature. The conductivity of a membrane with 15.5 mol% of polymer units with a phosphonic acid group was 5.15 S m−1 at 35°C. Membrane containing 15.5 mol% phosphonic acid units in polymer was tested in fuel cell.
Trvalý link: http://hdl.handle.net/11104/0253115