Differences in Water Dynamics between the Hydrated Chitin and Hydrated Chitosan Determined by Quasi-Elastic Neutron Scattering

被引:3
|
作者
Hirota, Yuki [1 ]
Tominaga, Taiki [2 ]
Kawabata, Takashi [1 ]
Kawakita, Yukinobu [3 ]
Matsuo, Yasumitsu [1 ]
机构
[1] Setsunan Univ, Fac Sci & Engn, Dept Life Sci, Neyagawa, Osaka 5728508, Japan
[2] Comprehens Res Org Sci & Soc CROSS, Neutron Sci & Technol Ctr, Tokai, Ibaraki 3191106, Japan
[3] Japan Atom Energy Agcy, Japan Proton Accelerator Res Complex J PARC Ctr, Tokai, Ibaraki 3191195, Japan
来源
BIOENGINEERING-BASEL | 2023年 / 10卷 / 05期
关键词
biomaterial; fuel cell electrolyte; chitin; chitosan; hydration water dynamics; hydrogen atoms dynamics; proton conductivity; quasi-elastic neutron scattering (QENS); proton acceptors;
D O I
10.3390/bioengineering10050622
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Recently, it was reported that chitin and chitosan exhibited high-proton conductivity and function as an electrolyte in fuel cells. In particular, it is noteworthy that proton conductivity in the hydrated chitin becomes 30 times higher than that in the hydrated chitosan. Since higher proton conductivity is necessary for the fuel cell electrolyte, it is significantly important to clarify the key factor for the realization of higher proton conduction from a microscopic viewpoint for the future development of fuel cells. Therefore, we have measured proton dynamics in the hydrated chitin using quasi-elastic neutron scattering (QENS) from the microscopic viewpoint and compared the proton conduction mechanism between hydrated chitin and chitosan. QENS results exhibited that a part of hydrogen atoms and hydration water in chitin are mobile even at 238 K, and the mobile hydrogen atoms and their diffusion increase with increasing temperature. It was found that the diffusion constant of mobile protons is two times larger and that the residence time is two times faster in chitin than that in chitosan. In addition, it is revealed from the experimental results that the transition process of dissociable hydrogen atoms between chitin and chitosan is different. To realize proton conduction in the hydrated chitosan, the hydrogen atoms of the hydronium ions (H3O+) should be transferred to another hydration water. By contrast, in hydrated chitin, the hydrogen atoms can transfer directly to the proton acceptors of neighboring chitin. It is deduced that higher proton conductivity in the hydrated chitin compared with that in the hydrated chitosan is yielded by the difference of diffusion constant and the residence time by hydrogen-atom dynamics and the location and number of proton acceptors.
引用
收藏
页数:17
相关论文
共 50 条
  • [41] Incoherent quasi-elastic neutron scattering in water-PEG solutions
    Crupi, V
    Magazu, S
    Majolino, D
    Migliardo, P
    Wanderlingh, U
    Kagunya, WW
    PHYSICA B, 1997, 241 : 979 - 981
  • [42] Incoherent quasi-elastic neutron scattering in water-PEG solutions
    Crupi, V.
    Magazu, S.
    Majolino, D.
    Migliardo, P.
    Wanderlingh, U.
    Kagunya, W.W.
    Physica B: Condensed Matter, 1997, 241-243 : 979 - 981
  • [43] Quasi-Elastic Neutron Scattering Studies on Hydration Water in Phospholipid Membranes
    Yamada, Takeshi
    Seto, Hideki
    FRONTIERS IN CHEMISTRY, 2020, 8
  • [44] QUASI-ELASTIC SCATTERING OF NEUTRONS IN WATER
    GORDEEV, GP
    KHAIDAROV, T
    JETP LETTERS, 1976, 23 (04) : 179 - 183
  • [45] Dynamics in hydrated inorganic nanotubes studied by neutron scattering: towards nanoreactors in water
    Le Caer, Sophie
    Pignie, Marie-Claire
    Berrod, Quentin
    Grzimek, Veronika
    Russina, Margarita
    Carteret, Cedric
    Thill, Antoine
    Zanotti, Jean-Marc
    Teixeira, Jose
    NANOSCALE ADVANCES, 2021, 3 (03): : 789 - 799
  • [46] Quasielastic neutron scattering studies on couplings of protein and water dynamics in hydrated elastin
    Kaempf, Kerstin
    Demuth, Dominik
    Zamponi, Michaela
    Wuttke, Joachim
    Vogel, Michael
    JOURNAL OF CHEMICAL PHYSICS, 2020, 152 (24):
  • [47] The dynamics of water in hydrated white bread investigated using quasielastic neutron scattering
    Sjostrom, J.
    Kargl, F.
    Fernandez-Alonso, F.
    Swenson, J.
    JOURNAL OF PHYSICS-CONDENSED MATTER, 2007, 19 (41)
  • [48] Neutron transmission and quasi-elastic neutron scattering in polymer hydrogels
    Klepko, V
    POLYMER ENGINEERING AND SCIENCE, 1999, 39 (03): : 437 - 442
  • [49] Solvent Dynamics in Solutions of PNIPAM in Water/Methanol Mixtures-A Quasi-Elastic Neutron Scattering Study
    Kyriakos, Konstantinos
    Philipp, Martine
    Silvi, Luca
    Lohstroh, Wiebke
    Petry, Winfried
    Mueller-Buschbaum, Peter
    Papadakis, Christine M.
    JOURNAL OF PHYSICAL CHEMISTRY B, 2016, 120 (20): : 4679 - 4688
  • [50] Quasi-elastic neutron scattering studies of the slow dynamics of supercooled and glassy aspirin
    Zhang, Yang
    Tyagi, Madhusudan
    Mamontov, Eugene
    Chen, Sow-Hsin
    JOURNAL OF PHYSICS-CONDENSED MATTER, 2012, 24 (06)