3 years ago

Biocidal poly (vinyl alcohol) films incorporated with N-halamine siloxane

Rong Li, Junfeng Sheng, Xiaoli Cheng, Jing Li, Xuehong Ren, Tung-shi Huang

Publication date: December 2018

Source: Composites Communications, Volume 10

Author(s): Rong Li, Junfeng Sheng, Xiaoli Cheng, Jing Li, Xuehong Ren, Tung-Shi Huang

Abstract

An N-halamine siloxane precursor γ-(β-hydroxyl-γ-5,5- dimethylhydantoin)aminopropyltrithoxysilane (abbreviated as GHAPA) was synthesized in this study. GHAPA was mixed with PVA solution to prepare PVA/GHAPA cross linked film with an antimicrobial function. The obtained PVA/GHAPA cross linked film was characterized by TGA, DSC and XRD. Upon dilute household bleach treatment, the chlorinated PVA/GHAPA cross linked film could inactivate Staphylococcus aureus and Escherichia coli O157:H7 completely with concentrations of 4.57 × 107cfu and 2.70 × 107cfu within 5 and 10 min, respectively, and 99.9995% of Escherichia coli O157:H7 could be inactivated within 5 min. The antimicrobial results showed that the chlorinated films substantially outperformed the unchlorinated control samples. The biocidal films may serve as potential materials for food packaging and biomedical applications.

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