期刊
CARBOHYDRATE POLYMERS
卷 102, 期 -, 页码 504-512出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.11.025
关键词
Chitosan; Solution plasma; Metal complexation; Chitosan oligomers
资金
- Ratchadapiseksomphot Endowment Fund, Chulalongkorn University
- Chulalongkorn University
- Thailand Research Fund (TRF) [BRG5480008]
- Grants-in-Aid for Scientific Research [23246126] Funding Source: KAKEN
Chitosan-metal complexes were depolymerized under acidic conditions using a solution plasma system. Four different types of metal ions, including Ag+, Zn2+, Cu2+, and Fe3+ ions, were added to the chitosan solution at a metal-to-chitosan molar ratio of 1:8. The depolymerization rate was affected by the types of metal ions that form complexes with chitosan. The complexation of chitosan with Cu2+ or Fe3+ ions strongly promoted the depolymerization rate of chitosan using a solution plasma treatment. However, chitosan-Ag+ and chitosan-Zn2+ complexes exhibited no change in the depolymerization rate compared to chitosan. After plasma treatment of the chitosan-metal complexes, the depolymerized chitosan products were separated into water-insoluble and water-soluble fractions. The water-soluble fraction containing low-molecular-weight chitosan was obtained in a yield of less than 57% for the depolymerization of chitosan-Fe3+ complex with the plasma treatment time of 180 min. (C) 2013 Elsevier Ltd. All rights reserved.
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