Pressure retarded osmosis (PRO) is an attractive process for capturing renewable energy that requires high-performance and fouling-resistant membranes. Herein, we report a novel surface coating method that increases the water flux and organic fouling resistance of PRO membranes. The support layer of a commercial TFC was coated with TiO2 nanoparticles (TNPs) via a sol-gel-derived spray coating method. This TNP coating imparted hydrophilic properties and a negative charge to the membrane surface. A TNP-coated membrane (TNP1.0) showed a 25% increase in water flux and a 50% decrease in reverse salt flux. The flux reduction of the TNP membrane was 32% less than that of a commercial TFC membrane in the presence of humic acid foulants. This suggests that a high-performance and fouling-resistant PRO membrane can be prepared using a TiO2 sol-gel-derived spray coating method.
|Original language||English (US)|
|Number of pages||8|
|State||Published - Nov 1 2016|
Bibliographical noteFunding Information:
This research was supported by a grant (code 16IFIP-B065893- 04) from the Industrial Facilities & Infrastructure Research Program and was funded by the Ministry of Land, Infrastructure and Transport of Korean government and the National Research Foundation of Korea Grant of the Korean Government ( NRF-2010-C1AAA01-0029081 ).
- Fouling resistance
- Performance enhancement
- Pressure retarded osmosis
- Surface modification
- TiO nanoparticle coating
- TiO sol-gel-derived spray coating