Fabrication of PVDF/PVP nanofiltration membrane containing chitosan/activated carbon/Ag nanoparticles by electrospinning and their antibacterial activity

Main Article Content

Ronariddh Nakhowong

Abstract

Polyvinylidene fluoride (PVDF)/poly(vinylpyrrolidone)(PVP) nanofiltration membranes containing chitosan/activated carbon/silver nanoparticles were fabricated by electrospinning. Different amount of silver nanoparticles (AgNPs) (x = 0, 0.20, 0.30, 0.40 and 0.5 %v v–1) were added to PVDF/PVP/chitosan(CS)/activated carbon (AC) solution. The composite fibrous membranes were characterized by field emission scanning electron microscopy (FESEM), UV-Vis spectroscopy (UV-Vis), and attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR). FESEM images showed that the fibrous membranes had rough surfaces with random distribution and average fiber diameter ranging from 0.90 to 1.80 μm. For the composite fibrous membranes, average diameter increases as the amount of Ag nanoparticles increased. UV-Vis spectrum exhibited surface plasmon resonance band at 389 nm. Zetasizer measurement showed average diameter of AgNPs as 30 nm. Performances of the composite membrane were assessed by vacuum filtration. Silica (SiO2) particles with diameters of 0.10 – 0.60 μm were used to test the filtration efficiency. After filtration, silica particles with sizes ranging from 0.20 – 0.35 μm were detected, indicating that composite membranes effectively filtrated silica particles and bacteria with size over 0.35 µm. ATR-FTIR showed dominant absorption peaks corresponding to PVDF and PVP. Antibacterial activities of the composite membrane were tested against Staphylococcus aureus and Escherichia coli following the filtration method. Results confirmed excellent antibacterial performance of composite membranes containing AgNPs against Escherichia coli, with potential promising candidates for purifying drinking purified water and other applications.

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How to Cite
Nakhowong, R. (2020). Fabrication of PVDF/PVP nanofiltration membrane containing chitosan/activated carbon/Ag nanoparticles by electrospinning and their antibacterial activity. SNRU Journal of Science and Technology, 12(1), 137-145. Retrieved from https://www.tci-thaijo.org/index.php/snru_journal/article/view/213712
Section
Research Article

References

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