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

Sang Hee Park, Seon Oh Hwang, Taek Seung Kim, Arah Cho, Soon Jin Kwon, Kyoung Taek Kim, Hee-Deung Park, Jung-hyun Lee

Research output: Contribution to journalArticle

11 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)458-466
Number of pages9
JournalApplied Surface Science
Volume443
DOIs
Publication statusPublished - 2018 Jun 15

Keywords

  • Anti-biofouling
  • Antibacterial activity
  • Polyamide thin film composite membrane
  • Reverse osmosis
  • Surface immobilization
  • Triclosan

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

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