Proton Conduction via Water Bridges Hydrated in the Collagen Film
Collagen films with proton conduction are a candidate of next generation of fuel-cell electrolyte. To clarify a relation between proton conductivity and formation of water networks in the collagen film originating from a tilapia's scale, we systematically measured the ac conductivity, infrared absorption spectrum, and weight change as a function of relative humidity (RH) at room temperature. The integrated absorbance concerning an O-H stretching mode of water molecules increases above 60% RH in accordance with the weight change. The dc conductivity varies in the vicinity of 60 and 83% RH. From those results, we have determined the dc conductivity vs. hydration number (N) per unit (Gly-X-Y). The proton conduction is negligible in the collagen molecule itself, but dominated by the hydration shell, the development of which is characterized with three regions. For 0 < N < 2, the conductivity is extremely small, because the water molecule in the primary hydration shell has a little hydrogen bonded with each other. For 2 < N < 4, a quasi-one-dimensional proton conduction occurs through intra-water bridges in the helix. For 4 < N, the water molecule fills the helix, and inter-water bridges are formed in between the adjacent helices, so that a proton-conducting network is extended three dimensional.
Medienart: |
E-Artikel |
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Erscheinungsjahr: |
2020 |
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Erschienen: |
2020 |
Enthalten in: |
Zur Gesamtaufnahme - volume:11 |
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Enthalten in: |
Journal of functional biomaterials - 11(2020), 3 vom: 02. Sept. |
Sprache: |
Englisch |
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Beteiligte Personen: |
Matsui, Hiroshi [VerfasserIn] |
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Links: |
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Themen: |
Bio-electrolyte |
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Anmerkungen: |
Date Revised 28.10.2020 published: Electronic Citation Status PubMed-not-MEDLINE |
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doi: |
10.3390/jfb11030061 |
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funding: |
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Förderinstitution / Projekttitel: |
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PPN (Katalog-ID): |
NLM314602011 |
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520 | |a Collagen films with proton conduction are a candidate of next generation of fuel-cell electrolyte. To clarify a relation between proton conductivity and formation of water networks in the collagen film originating from a tilapia's scale, we systematically measured the ac conductivity, infrared absorption spectrum, and weight change as a function of relative humidity (RH) at room temperature. The integrated absorbance concerning an O-H stretching mode of water molecules increases above 60% RH in accordance with the weight change. The dc conductivity varies in the vicinity of 60 and 83% RH. From those results, we have determined the dc conductivity vs. hydration number (N) per unit (Gly-X-Y). The proton conduction is negligible in the collagen molecule itself, but dominated by the hydration shell, the development of which is characterized with three regions. For 0 < N < 2, the conductivity is extremely small, because the water molecule in the primary hydration shell has a little hydrogen bonded with each other. For 2 < N < 4, a quasi-one-dimensional proton conduction occurs through intra-water bridges in the helix. For 4 < N, the water molecule fills the helix, and inter-water bridges are formed in between the adjacent helices, so that a proton-conducting network is extended three dimensional | ||
650 | 4 | |a Journal Article | |
650 | 4 | |a bio-electrolyte | |
650 | 4 | |a biofuel cell | |
650 | 4 | |a biomaterial | |
650 | 4 | |a collagen | |
650 | 4 | |a fuel-cell electrolyte | |
650 | 4 | |a hydration | |
650 | 4 | |a hydrogen bond | |
650 | 4 | |a ionic conduction | |
650 | 4 | |a proton conduction | |
650 | 4 | |a water bridge | |
700 | 1 | |a Matsuo, Yasumitsu |e verfasserin |4 aut | |
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