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Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature
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 polydimethylsil...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7284654/ https://www.ncbi.nlm.nih.gov/pubmed/32423076 http://dx.doi.org/10.3390/polym12051125 |
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author | Humelnicu, Andra-Cristina Samoila, Petrisor Asandulesa, Mihai Cojocaru, Corneliu Bele, Adrian Marinoiu, Adriana T. Sacca, Ada Harabagiu, Valeria |
author_facet | Humelnicu, Andra-Cristina Samoila, Petrisor Asandulesa, Mihai Cojocaru, Corneliu Bele, Adrian Marinoiu, Adriana T. Sacca, Ada Harabagiu, Valeria |
author_sort | Humelnicu, Andra-Cristina |
collection | PubMed |
description | 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’ structure, thickness, morphology, mechanical, and thermal properties prior and after cross-linking reactions were evaluated. Membranes’ 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(−3) S/cm and 6.2 × 10(−3) S/cm, as determined at 60 °C by dielectric spectroscopy and the four-probes method, respectively. |
format | Online Article Text |
id | pubmed-7284654 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-72846542020-06-15 Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature Humelnicu, Andra-Cristina Samoila, Petrisor Asandulesa, Mihai Cojocaru, Corneliu Bele, Adrian Marinoiu, Adriana T. Sacca, Ada Harabagiu, Valeria Polymers (Basel) Article 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’ structure, thickness, morphology, mechanical, and thermal properties prior and after cross-linking reactions were evaluated. Membranes’ 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(−3) S/cm and 6.2 × 10(−3) S/cm, as determined at 60 °C by dielectric spectroscopy and the four-probes method, respectively. MDPI 2020-05-14 /pmc/articles/PMC7284654/ /pubmed/32423076 http://dx.doi.org/10.3390/polym12051125 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Humelnicu, Andra-Cristina Samoila, Petrisor Asandulesa, Mihai Cojocaru, Corneliu Bele, Adrian Marinoiu, Adriana T. Sacca, Ada Harabagiu, Valeria Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature |
title | Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature |
title_full | Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature |
title_fullStr | Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature |
title_full_unstemmed | Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature |
title_short | Chitosan-Sulfated Titania Composite Membranes with Potential Applications in Fuel Cell: Influence of Cross-Linker Nature |
title_sort | chitosan-sulfated titania composite membranes with potential applications in fuel cell: influence of cross-linker nature |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7284654/ https://www.ncbi.nlm.nih.gov/pubmed/32423076 http://dx.doi.org/10.3390/polym12051125 |
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