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| he structure, properties, and application in 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 content of silver ions in the complex agent improved in 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 MIC 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 pain |
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| Keywords:complex antimicrobial agent, carboxylmethyl chitosan, silver, thiabendazole, water-soluble antimicrobial coating |
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