Chlorine Rechargeable Biocidal N‑Halamine Nanofibrous Membranes Incorporated with Bifunctional Zwitterionic Polymers for Efficient Water Disinfection Applications

An intrinsically hydrophilic nanofibrous membrane with chlorine rechargeable biocidal and antifouling functions was prepared by using a combination of chemically bonded N-halamine moieties and zwitterionic polymers (PEI-S). The designed nanofibrous membrane, named as PEI-S@BNF-2 h, can exhibit integ...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2020-11, Vol.12 (45), p.51057-51068
Main Authors: Ma, Yue, Yi, Jiyoon, Pan, Bofeng, Nitin, Nitin, Sun, Gang
Format: Article
Language:English
Subjects:
Amines - chemistry
Amines - pharmacology
Anti-Bacterial Agents - chemistry
Anti-Bacterial Agents - pharmacology
Bacterial Adhesion - drug effects
Biofouling - prevention & control
Chlorine - chemistry
Chlorine - pharmacology
Disinfection
Escherichia coli - drug effects
Hydrophobic and Hydrophilic Interactions
Listeria - drug effects
Microbial Sensitivity Tests
Nanofibers - chemistry
Particle Size
Polymers - chemistry
Polymers - pharmacology
Surface Properties
Surfaces, Interfaces, and Applications
Water Purification
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Summary:An intrinsically hydrophilic nanofibrous membrane with chlorine rechargeable biocidal and antifouling functions was prepared by using a combination of chemically bonded N-halamine moieties and zwitterionic polymers (PEI-S). The designed nanofibrous membrane, named as PEI-S@BNF-2 h, can exhibit integrated features of reduced bacterial adhesion, rechargeable biocidal activity, and easy release of killed bacteria by using mild hydrodynamic forces. The representative functional performances of the PEI-S@BNF-2 h membrane include high active chlorine capacity (>4000 ppm), large specific surface area, ease of chlorine rechargeability, long-term stability, and exceptional biocidal activity (99.9999% via contact killing). More importantly, the zwitterionic polymer moieties (PEI-S) brought robust antifouling properties to this biocidal membrane, therefore reducing the biofouling-biofilm effect and prolonging the lifetime of the filtration membrane. These attributes enable the PEI-S@BNF-2 h nanofibrous membrane to effectively disinfect the microbe-contaminated water with high fluxes (10,000 L m–2 h–1) and maintain itself clean for a long-term application.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.0c14856