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Preparation, characterization, and antioxidant activity of water-soluble oligochitosan
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Preparation, characterization, and antioxidant activity of water-soluble oligochitosan
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Preparation, characterization, and antioxidant activity of water-soluble oligochitosan
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Journal Article
Preparation, characterization, and antioxidant activity of water-soluble oligochitosan
2017
Overview
The preparation of oligochitosan through the heterogeneous degradation of chitosan/H
combined with the homogeneous reaction of chitosan with H
under gamma radiation was studied. Oligochitosan with weight-average molecular weight (M
) of less than 10 kDa could be efficiently prepared by gamma Co
irradiation of chitosan solution (4%) and hydrogen peroxide (0.5%) at doses ranging from 8 to 24 kGy. The M
, chemical structure, and the crystallinity of chitosan and oligochitosan were characterized by GPC, FT-IR, and XRD. The solubility and antioxidant activity of chitosan and of oligochitosan with the different molecular weights were investigated. Results showed that oligochitosan CS
(20 kGy) and CS
(24 kGy) have good solubility in the pH range of 3 to –11. The scavenge percentage of CS
against 2,2-azino-bis (3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical is 99.2% in 90 min. The antioxidant activity of oligochitosan is effective in a short time period; therefore, it has potential application as an effective and natural antioxidant.
Publisher
De Gruyter,Walter de Gruyter GmbH
Subject
