We reported a facile surface modification by the TiO2 sol-gel derived spray coating method to enhance the fouling resistance of a polyamide (PA) reverse osmosis (RO) membrane. TiO2 nanoparticles (TNPs) were prepared by the base catalyzed sol-gel method for a short span of time and deposited onto the commercial PA RO membrane by spraying. The coated TNPs, which have a role as a functional layer on the PA RO membrane, made the membrane surface more hydrophilic and more negatively charged. These modified surface properties reduced the interactive force between humic acid and the membrane surface which resulted in the enhancement of fouling resistance of the PA RO membrane without losses in membrane performances such as the permeate flux and salt rejection when the proper amounts of TiO2 were coated on the membrane. This study suggests a facile surface modification to fabricate a fouling resistant PA RO membrane by using the TiO2 sol-gel derived spray coating method.
Bibliographical noteFunding Information:
This research was supported by grant (code 17IFIP-B088091-04) from Industrial Facilities & Infrastructure Research Program and funded by Ministry of Land, Infrastructure and Transport of Korean government, and by Korea Ministry of Environment as “Global Top Project (E617-00211-0608-0).”
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- Reverse osmosis
- Surface modification
- TFC membrane
- TiO2 sol-gel spray coating