Surface-concentrated chitosan-doped MIL-100(Fe) nanofiller-containing PVDF composites for enhanced antibacterial activity

Kie Yong Cho, Cheol Hun Yoo, Young June Won, Do Young Hong, Jong San Chang, Jae Woo Choi, Jung-hyun Lee, Jong Suk Lee

Research output: Contribution to journalArticle

Abstract

Antibacterial properties are a major issue for the membrane-based wastewater treatment since the biofilm on membranes generated by bacterial growth can significantly reduce water flux. Here, the surface-concentrated MIL-100(Fe)/chitosan (MIL100-CS)-embedded polyvinylidene fluoride (PVDF) composite membranes (i.e., PVDF-S/MIL100-CS) were successfully fabricated by the newly developed fabrication method, so-called solvent-assisted nanoparticle embedding (SANE). The SANE method was modified from the conventional nonsolvent-induced phase separation method by the addition of an intermediate step for the selective arrangement of hydrophilic nanofillers on top of the nascent PVDF film. The additional step in the SANE method enabled the surface-selective filler distribution with the open surface of fillers, resulting in the hydrophilic surface. Also, it facilitated to form the sponge-like pore structures mostly due to the dilution effect of additional solvent. The PVDF/MIL100-CS microfiltration (MF) composite membranes acquired by SANE exhibited the higher antibacterial activity and the substantially enhanced biofouling resistance for E. coli cells than those of the pristine PVDF due to the surface-selective arrangement of MIL100-CS fillers which include both hydrophilic and biocidal properties. The live/dead test for antibacterial activities with E. coli cells further confirmed the enhanced suppression of the biofouling resistance in the asymmetric PVDF/MIL100-CS composite membranes relative to that of PVDF. Our current study offers a new platform for fabricating asymmetric MF composite membranes with enhanced antibacterial activity and biofouling resistance.

Original languageEnglish
Article number109221
JournalEuropean Polymer Journal
Volume120
DOIs
Publication statusPublished - 2019 Nov 1

Fingerprint

Chitosan
vinylidene
Composite membranes
fluorides
Biofouling
composite materials
membranes
Composite materials
Nanoparticles
embedding
Fillers
Microfiltration
fillers
Escherichia coli
nanoparticles
selective surfaces
Membranes
Biofilms
Pore structure
Phase separation

Keywords

  • Antibacterial activity
  • Antifouling
  • Chitosan doping
  • MIL-100(Fe)
  • PVDF composites

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

Surface-concentrated chitosan-doped MIL-100(Fe) nanofiller-containing PVDF composites for enhanced antibacterial activity. / Cho, Kie Yong; Yoo, Cheol Hun; Won, Young June; Hong, Do Young; Chang, Jong San; Choi, Jae Woo; Lee, Jung-hyun; Lee, Jong Suk.

In: European Polymer Journal, Vol. 120, 109221, 01.11.2019.

Research output: Contribution to journalArticle

Cho, Kie Yong ; Yoo, Cheol Hun ; Won, Young June ; Hong, Do Young ; Chang, Jong San ; Choi, Jae Woo ; Lee, Jung-hyun ; Lee, Jong Suk. / Surface-concentrated chitosan-doped MIL-100(Fe) nanofiller-containing PVDF composites for enhanced antibacterial activity. In: European Polymer Journal. 2019 ; Vol. 120.
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