期刊
MEMBRANES
卷 10, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/membranes10100289
关键词
polyvinylidene fluoride membrane (PVDF); titanium dioxide nanoparticles (TiO2-NP); silver nanoparticles (AgNP); antibacterial property; antifouling property
类别
资金
- Commission on Higher Education [MRG6280181]
- Thailand Research Fund [MRG6280181]
- Ratchadaphiseksomphot Endowment Fund, Chulalongkorn University
- Chiang Mai University
This work investigates polyvinylidene fluoride (PVDF) membrane modification to enhance its hydrophilicity and antibacterial properties. PVDF membranes were coated with nanoparticles of titanium dioxide (TiO2-NP) and silver (AgNP) at different concentrations and coating times and characterized for their porosity, morphology, chemical functional groups and composition changes. The results showed the successfully modified PVDF membranes containing TiO2-NP and AgNP on their surfaces. When the coating time was increased from 8 to 24 h, the compositions of Ti and Ag of the modified membranes were increased from 1.39 +/- 0.13 to 4.29 +/- 0.16 and from 1.03 +/- 0.07 to 3.62 +/- 0.08, respectively. The water contact angle of the membranes was decreased with increasing the coating time and TiO2-NP/AgNP ratio. The surface roughness and permeate fluxes of coated membranes were increased due to increased hydrophilicity. Antimicrobial and antifouling properties were investigated by the reduction of Escherichia coli cells and the inhibition of biofilm formation on the membrane surface, respectively. Compared with that of the original PVDF membrane, the modified membranes exhibited antibacterial efficiency up to 94% against E. coli cells and inhibition up to 65% of the biofilm mass reduction. The findings showed hydrophilic improvement and an antimicrobial property for possible wastewater treatment without facing the eminent problem of biofouling.
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