Influence of post-casting treatments on sulphonated polyetheretherketone composite membranes (Articolo in rivista)

Type
Label
  • Influence of post-casting treatments on sulphonated polyetheretherketone composite membranes (Articolo in rivista) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.jpowsour.2010.02.039 (literal)
Alternative label
  • Alessandra Carbone; Irene Gatto; Akihiro Ohira; Libin Wu; Enza Passalacqua (2010)
    Influence of post-casting treatments on sulphonated polyetheretherketone composite membranes
    in Journal of power sources (Print); Elsevier B.V., Amsterdam (Belgio)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Alessandra Carbone; Irene Gatto; Akihiro Ohira; Libin Wu; Enza Passalacqua (literal)
Pagina inizio
  • 6037 (literal)
Pagina fine
  • 6042 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 195 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 18 (literal)
Note
  • Scopu (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-ITAE, Institute for Advanced Energy Technologies \"N. Giordano\" Via Salita S. Lucia sopra Contesse, 5 - Messina, Italy FC-CUBIC (Polymer Electrolyte Fuel Cell Cutting-Edge Research Center) AIST Tokyo Waterfront, 2-41-6, Aomi, Koto-ku, Tokyo 135-0064, Japan (literal)
Titolo
  • Influence of post-casting treatments on sulphonated polyetheretherketone composite membranes (literal)
Abstract
  • Since the post-casting treatments influence the water entrapped in polymeric matrix and consequently its proton conductivity, an evaluation of annealing at 200 oC and acid treatments was conducted on previously developed composite s-PEEK (1.55 mequiv. g-1) membranes, containing a commercial aminopropyl-functionalised silica. DSC, WAXS, SEM-EDX and laser microscope measurements carried out onmembranesswollen at different temperatures highlighted differentmembraneproperties depending on post-casting treatments. It was found that composite membranes have different structural and morphological characteristics than pristine polymer membranes. The silica distribution was modified when different treatments are used. The state of water changed when silica was inserted into the membranes. Actually, contrary to the pristine membranes the presence of freezable water was revealed at temperature lower than 80 oC. The proton conductivity was also affected by the presence and the amount of water trapped into the membranes and was particularly influenced by the post-casting treatments. The silica introduction reduced the swelling effect and improved the robustness of the membranes even if a higher water content in the freezable state was observed. Acid treatment leads to significant improvement in membrane properties, but the present work shows that annealing before acid treatment can affect the membrane morphology more strongly than other treatments resulting in a much better fuel cell performance. (literal)
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