N-Halamine modified thermoplastic polyurethane with rechargeable antimicrobial function for food contact surface

A polymer blend of two N -halamine precursors was prepared and homogeneously incorporated into TPU structure via a solvent casting method, and an N -halamine modified TPU film with rechargeable antimicrobial activity resulted after treating with chlorine bleach. Antimicrobial efficacies were evaluat...

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Bibliographic Details
Published inRSC advances Vol. 7; no. 3; pp. 1233 - 1240
Main Authors Qiao, Mingyu, Ren, Tian, Huang, Tung-Shi, Weese, Jean, Liu, Ying, Ren, Xuehong, Farag, Ramsis
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 01.01.2017
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Summary:A polymer blend of two N -halamine precursors was prepared and homogeneously incorporated into TPU structure via a solvent casting method, and an N -halamine modified TPU film with rechargeable antimicrobial activity resulted after treating with chlorine bleach. Antimicrobial efficacies were evaluated against both Staphylococcus aureus ( S. aureus ) and Escherichia coli O157:H7 ( E. coli ). Results showed that the N -halamine modified TPU film caused 6 log CFU reduction of bacteria reduction within 2 hours of contact. Moreover, the N -halamine modified TPU displayed desirable rechargeability and stability, which maintained sufficient antimicrobial activity after 20 cycles of “discharge–recharge” process and over 4 weeks of storage. Besides, the tensile strength and surface tension of TPU were not adversely affected by N -halamine modification. The N -halamine modified TPU with rechargeable antimicrobial function exhibited great potential as a cheap, safe and effective food contact surface material for preventing food microbial cross-contamination.
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ISSN:2046-2069
2046-2069
DOI:10.1039/c6ra25502g