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Triclosan-immobilized polyamide thin film composite membranes with enhanced biofouling resistance

Author(s)
Park, Sang-HeeHwang, Seon OhKim, Taek-SeungCho, ArahKwon, Soon JinKim, Kyoung TaekPark, Hee-DeungLee, Jung-Hyun
Issued Date
2018-06
DOI
10.1016/j.apsusc.2018.03.003
URI
https://scholarworks.unist.ac.kr/handle/201301/23908
Fulltext
https://www.sciencedirect.com/science/article/pii/S0169433218306561?via%3Dihub
Citation
APPLIED SURFACE SCIENCE, v.443, pp.458 - 466
Abstract
We report on a strategy to improve biofouling resistance of a polyamide (PA) thin-film composite (TFC) reverse osmosis (RO) membrane via chemically immobilizing triclosan (TC), known as a common organic biocide, on its surface. To facilitate covalent attachment of TC on the membrane surface, TC was functionalized with amine moiety to prepare aminopropyl TC. Then, the TC-immobilized TFC (TFC-TC) membranes were fabricated through a one-step amide formation reaction between amine groups of aminopropyl TC and acyl chloride groups present on the PA membrane surface, which was confirmed by high-resolution XPS. Strong stability of the immobilized TC was also confirmed by a hydraulic washing test. Although the TFC-TC membrane showed slightly reduced separation performance compared to the pristine control, it still maintained a satisfactory RO performance level. Importantly, the TFC-TC membrane exhibited excellent antibacterial activity against both gram negative (E. coli and P. aeruginosa) and gram positive (S. aureus) bacteria along with greatly enhanced resistance to biofilm formation. Our immobilization approach offers a robust and relatively benign strategy to control biofouling of functional surfaces, films and membranes.
Publisher
ELSEVIER SCIENCE BV
ISSN
0169-4332
Keyword (Author)
TriclosanSurface immobilizationPolyamide thin film composite membraneReverse osmosisAnti-biofoulingAntibacterial activity
Keyword
REVERSE-OSMOSIS MEMBRANESANTIBACTERIAL PROPERTIESNANOFILTRATION MEMBRANESILVER NANOPARTICLESSURFACE MODIFICATIONWATER-PURIFICATIONGRAPHENE OXIDERO MEMBRANESPHYSICOCHEMICAL CHARACTERIZATIONINTERFACIAL POLYMERIZATION

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