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Preparation, characterization, antifungal activity, and mechanism of chitosan/TiO 2 hybrid film against bipolaris maydis
Author(s) -
Huang Qunzeng,
Jiao Zhujin,
Li Min,
Qiu Dongfang,
Liu Kecheng,
Shi Hengzhen
Publication year - 2012
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.38322
Subject(s) - antifungal , chitosan , fungus , photocatalysis , materials science , chemistry , nuclear chemistry , stereochemistry , biology , microbiology and biotechnology , botany , organic chemistry , catalysis
A chitosan/TiO 2 hybrid film, as a powerful antifungal material for controlling southern corn leaf blight, which is caused by the fungus Bipolaris maydis ( B. maydis ), was prepared and characterized. Its antifungal activity toward B. maydis was studied, and the experimental results indicate that it had multiple attractive antifungal properties as follows: (1) it displayed strong antifungal activity against B. maydis , with an inhibition ratio of 100% under both visible‐light irradiation and in a dark environment; (2) it exhibited a superior antifungal efficacy of 100%, even after 4 h under the irradiation of visible light; and (3) its antifungal activity included the effect of hydroxyl radicals generated by the photocatalysis of TiO 2 . The antifungal mechanism was attributed to the action of a large amount of positive charges on the structure of the hybrid film, which interacted with the negative charges from the cell and finally resulted in the inactivation of B. maydis . © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013