Durable antimicrobial cotton fabrics containing stable quaternarized N-halamine groups
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A novel N-halamine precursor with tertiary amino group (5,5-dimethylhydantoinyl-3-ylethyl)-dimethylamine (DEADH), was synthesized and then covalently bonded onto cotton fabrics modified by 3-chloropropyltrimethoxysilane to form quaternarized N-halamine precursor grafted cotton fabrics which could be transferred to N-halamine structure upon exposure to dilute sodium hypochlorite solution. The grafted cotton fabrics were characterized by FT-IR, X-ray photoelectron spectroscopy, and field emission scanning electron microscope. The antimicrobial test showed that the cotton fabrics grafted with the quaternarized N-halamine were capable of 7-log inactivation of Staphylococcus aureus and Escherichia coli O157:H7 within 1 min of contact time. Very interestingly, it was found that the grafting process and following chlorination had almost no adverse effect on the tensile strength of cotton fabrics. Furthermore, the antimicrobial cotton fabrics exhibited good washing durability and stability.
KeywordsDurable Antimicrobial Cotton fabric Quaternarized N-halamine Tensile strength
The authors would like to acknowledge the financial support from Shanghai Pujiang Talent Project (11PJ1407600), the Research and Innovation Project of Municipal Education Commission of Shanghai (12YZ085), the Shanghai Natural Science Foundation (10ZR1407700). This work is supported by PCSIRT (RT1269), the Program of Shanghai Normal University (DZL124).
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