Covalent Insertion of Antioxidant Molecules on Chitosan by a Free Radical Grafting Procedure
- 12 June 2009
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of Agricultural and Food Chemistry
- Vol. 57 (13), 5933-5938
- https://doi.org/10.1021/jf900778u
Abstract
In this work, the synthesis of gallic acid−chitosan and catechin−chitosan conjugates was carried out by adopting a free radical-induced grafting procedure. For this purpose, an ascorbic acid/hydrogen peroxide redox pair was employed as radical initiator. The formation of covalent bonds between antioxidant and biopolymer was verified by performing UV, FT-IR, and DSC analyses, whereas the antioxidant properties of chitosan conjugates were compared with that of a blank chitosan, treated in the same conditions but in the absence of antioxidant molecules. The good antioxidant activity shown by functionalized materials proved the efficiency of the reaction method.Keywords
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