|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Agriculture / Faculty of Agriculture >
Peer-reviewed Journal Articles, etc >
Anhydrous Proton Conduction of Soy Protein
This item is licensed under:Creative Commons Attribution 4.0 International
| Title: | Anhydrous Proton Conduction of Soy Protein |
| Authors: | Yamada, Masanori Browse this author | | Nagano, Yuka Browse this author | | Yamada, Tetsuya Browse this author →KAKEN DB |
| Keywords: | Composite material | | Soy protein | | Anhydrous proton conduction | | Polymer electrolyte | | Acidic amino acid |
| Issue Date: | Jan-2021 |
| Publisher: | ESG |
| Journal Title: | International Journal of Electrochemical Science |
| Volume: | 16 |
| Issue: | 5 |
| Start Page: | 151046 |
| Publisher DOI: | 10.20964/2021.01.74 |
| Abstract: | Water-soluble soy protein contains a large amount of acidic amino acids, such as glutamic and aspartic acids. Since these acidic amino acids possess the -COOH group in their side chain, the water soluble soy protein acts as an acidic polymer. Therefore, we prepared a composite material by the mixing of acidic protonated soy protein (SPH) and a basic heterocyclic molecule, such as imidazole (Im). The SPH-Im composite materials showed a thermal stability at <= 130 degrees C by the acid-base interaction between the acidic -COOH group, related to the side chain of the acidic amino acids, and basic Im molecule. Additionally, the proton conductivity of the SPH-Im composite material increased with the mixing of the Im molecule and reached a maximum proton conductivity at R=0.2. This proton conductivity was 4.4. 10-4 S cm(-1) at 130 degrees C under flowing dry nitrogen. Furthermore, the Ea of the proton conduction in the SPH-Im composite material was 0.27 - 0.76 eV. These results suggested that the proton conductive mechanism in composite material was based on the anhydrous proton transfer from the -COOH group to the deprotonated -COO- group. |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/81988 |
| Appears in Collections: | 農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
|
