Antibacterial PVA membranes containing TiO₂/N‐halamine nanoparticles

Abstract

Inorganic-organic composites have received considerable attention due to their combined properties. In this study, a N-halamine precursor poly[5,5-dimethyl-3-(3′triethoxysilylpropyl)-hydantoin] (PSPH) was synthesized and used for the production of inorganic-organic hybrid particles after reacting with nano-TiO 2 by a sol-gel process. The hybrid particles were characterized by FT-IR, XRD, and TGA-DTG. After chlorinated in the dilute sodium hypochlorite solution, antibacterial Cl-PSPH-TiO 2 nanoparticles (NPS) could be obtained and used for production of polyvinyl alcohol (PVA) composite membranes. The synthesized PSPH-TiO 2 /PVA composite membranes were characterized by SEM, FT-IR, XRD, and TGA-DTG. Meanwhile, antibacterial property, UV light stability, mechanical properties, and storage stability of the composite membranes were tested. The antibacterial composite membranes with Cl-PSPH-TiO 2 could inactivate 99.97% of Staphylococcus aureus (3.03 logs) and 100% of Escherichia coli O157:H7 (6.12 logs) within 30 min. The antibacterial composite membranes also showed good UV light stability, regeneration ability, and excellent storage stability. K E Y W O R D S antibacterial, inorganic-organic, nano-TiO 2 , N-halamine, PVA, UV light stability

Biomimetic Robust Starch Composite Films with Super-Hydrophobicity and Vivid Structural Colors

“…In DTG pattern of S 80 P 20 F 0 , there is a band between 400 °C and 500 °C after the main weight loss stage. As discussed in former studies, this band is ascribed to the carbonation of polyene residues [ 44 ]. More importantly, the sharp peak indicating the main weight loss in DTG curve shifts from 311 °C (S 100 P 0 F 0 ) to 315 °C (S 80 P 20 F 0 ), implying that PVA with higher crystallinity than starch improving the thermal stability of composite.…”

Preparation of Rechargeable Antibacterial Polypropylene/N-Halamine Materials Based on Melt Blending and Surface Segregation

“…Additionally, S. aureus was entirely eliminated within 5 min. Moreover, when the chlorination time is extended to 6 h, the PP/M-2N/2%-Cl films acquired antibacterial activity of 99.9% against E. coli within merely 1 min, manifesting superior antibacterial performance. , …”

Electrospun Ag‐dopedPA6multi‐stage structured nanofiber membrane with antibacterial property for oily particulate matters filtration

“…To avoid this potential threat, antibacterial agents are often added to prepare antibacterial air filtration materials. Inorganic compounds such as silver (Ag), [37][38][39] copper (Cu), 40,41 titanium dioxide (TiO 2 ), [42][43][44] and some natural plant extracts (e.g., melaleuca alternifolia extract, 45 bitter ginseng extract, 46 eucalyptus leaf extract, 47 mung bean protein, 48 etc.) have been applied in the production of antimicrobial materials.…”