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Structure, properties and application to water-soluble coatings of complex antimicrobial agent Ag-carboxymethyl chitosan-thiabendazole

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Abstract

The structure, properties and application to water-soluble coatings of a new complex antimicrobial agent Ag-carboxylmethyl citosan-thiabendazole (Ag-CMCTS-TBZ) prepared from different materiel ratios were reported. The silver ions were preferably coordinated with the free — NH2 groups and the — OH groups of secondary alcohol and carboxyl in CMCTS. TBZ preferably bonded to carboxyl group in CMCTS by electrostatic force and hydrogen bonding. Increase in silver ions content in the complex agent improved to some limited extent the antibacterial activity, but enhanced coloring and cost of the complex agent. Increase in TBZ content resulted in increase of antifungal activity, but decrease of water solubility of the complex agent. The antimicrobial MICs of the complex agent to Esherichia coli, Staphylococcus aureus, Candida albicans, Aspergillus niger, Mucor sp. were 20 – 80, 15 – 60, 20 – 55, 40 – 250, and 400 – 1700 mg/kg, respectively. Addition of 0.1% of this complex agent to acrylic emulsion paint made the paint without substantial change in color, luster, viscosity, odor or pH value, but with an excellent and chronically persisting broad-spectra antimicrobial activity.

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Correspondence to Xia Jin-lan PhD.

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Foundation item: Project (2001–1932) supported by the Funding for the Excellent Youth Teachers from the National Education Ministry of China

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Xia, Jl., Wang, C., Nie, Zy. et al. Structure, properties and application to water-soluble coatings of complex antimicrobial agent Ag-carboxymethyl chitosan-thiabendazole. J Cent. South Univ. Technol. 12, 526–530 (2005). https://doi.org/10.1007/s11771-005-0116-8

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  • DOI: https://doi.org/10.1007/s11771-005-0116-8

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