Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature
| Autor: | Adriana Marinoiu, Adrian Bele, Andra-Cristina Humelnicu, Mihai Asandulesa, Petrisor Samoila, Valeria Harabagiu, Corneliu Cojocaru, A. Saccà |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Polydimethylsiloxane Sulfuric acid General Chemistry Electrolyte Polymer Conductivity Article Dielectric spectroscopy lcsh:QD241-441 chemistry.chemical_compound Membrane chemistry Chemical engineering lcsh:Organic chemistry chitosan sulfated titania cross-linking polyelectrolyte composite membranes Chemical stability |
| Zdroj: | Polymers, Vol 12, Iss 1125, p 1125 (2020) Polymers Volume 12 Issue 5 Polymers (Basel) 12 (2020): 1125. doi:10.3390/polym12051125 info:cnr-pdr/source/autori:Andra-Cristina Humelnicu (1), Petrisor Samoila (1,*), Mihai Asandulesa (1), Corneliu Cojocaru (1), Adrian Bele (1), Adriana T. Marinoiu (2), Ada Sacca (3) and Valeria Harabagiu (1,*)/titolo:Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature/doi:10.3390%2Fpolym12051125/rivista:Polymers (Basel)/anno:2020/pagina_da:1125/pagina_a:/intervallo_pagine:1125/volume:12 |
| ISSN: | 2073-4360 |
| Popis: | Chitosan-sulfated titania composite membranes were prepared, characterized, and evaluated for potential application as polymer electrolyte membranes. To improve the chemical stability, the membranes were cross-linked using sulfuric acid, pentasodium triphosphate, and epoxy-terminated polydimethylsiloxane. Differences in membranes&rsquo structure, thickness, morphology, mechanical, and thermal properties prior and after cross-linking reactions were evaluated. Membranes&rsquo water uptake capacities and their chemical stability in Fenton reagent were also studied. As proved by dielectric spectroscopy, the conductivity strongly depends on cross-linker nature and on hydration state of membranes. The most encouraging results were obtained for the chitosan-sulfated titania membrane cross-linked with sulfuric acid. This hydrated membrane attained values of proton conductivity of 1.1 × 10&minus 3 S/cm and 6.2 × 3 S/cm, as determined at 60 ° C by dielectric spectroscopy and the four-probes method, respectively. |
| Databáze: | OpenAIRE |
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