Preparation of polysulfone/sulfonated polysulfone-SiO2 nanofiltration membrane and its performance characterization
Abstract
Purpose
This study aims to optimize the preparation conditions and modify the nanofiltration (NF) membranes to prepare high-performance polysulfone/sulfonated polysulfone composite nanofiltration (PSF/SPSF-NF) membranes through interfacial polymerization.
Design/methodology/approach
Investigating the impacts of anhydrous piperazine (PIP) concentration, trimesoyl chloride (TMC) concentration and basement membrane type on NF membrane performance, the optimal membrane was prepared. In addition, nano-SiO2 was added to the active separation layer to modify the NF membranes.
Findings
The comprehensive performance of PSF/SPSF-NF membranes was optimized when the concentration of PIP was 0.75 Wt.% and the concentration of TMC was 0.15 Wt.%, at which time the water flux was 66.1 L·m−2·h−1 and the retention rate of Na2SO4 was 98.1%. The comprehensive performance of polysulfone/sulfonated polysulfone-SiO2 nanofiltration (PSF/SPSF-SiO2-NF) membranes was optimized when the blending ratio of nano-SiO2 to PIP was 2:3, with a pure water flux of 81.9 L·m−2·h−1 and a Na2SO4 retention rate of 95.9%. Compared to polysulfone nanofiltration (PSF-NF) membranes and PSF/SPSF-NF membranes, NF membranes with nano-SiO2 increased the flux recovery rate by 22.9% and 8.7%.
Practical implications
PSF/SPSF-SiO2-NF membrane exhibits excellent antifouling properties.
Originality/value
There is currently no literature available on the preparation of NF membranes using polysulfone/sulfonated polysulfone (PSF/SPFS) as a substrate. This provides a method for modifying NF membranes, starting with the modification of the basement membrane and then modifying the active separation layer.
Keywords
Acknowledgements
The research group acknowledges the financial support provided by the Joint Training Demonstration Base Project for Graduate Students in Liaoning Province in 2022 (YJD202204) and the Liaoning Provincial Department of Education Project (JYTMS20230865).
Citation
Chen, L., Zhao, L., Ding, K., Xu, K. and Tang, X. (2024), "Preparation of polysulfone/sulfonated polysulfone-SiO2 nanofiltration membrane and its performance characterization", Pigment & Resin Technology, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/PRT-10-2023-0096
Publisher
:Emerald Publishing Limited
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