Abstract
As the forward osmosis (FO) process utilizes natural osmosis as the pressure source, the energy demand can be significantly reduced compared with other pressure-driven processes, such as RO. In a surface-modification study conducted by the authors, membrane surfaces were coated with zwitterionic polymer 3-(3,4-Dihydroxyphenyl)-L-alanine (L-DOPA) to increase the fouling resistance of the membrane. The relationship between the zwitterionic coating and the improved antifouling effect was investigated by observing filtration flux and quantifying the change of water contact angle on the membrane surfaces. L-DOPA has both positively and negatively charged zwitterionic heads, which could lead to antifouling properties; it is also exceptionally adhesive to various surfaces, making it an ideal antifouling coating. One factor that affects the fouling behavior of FO membrane is the internal concentration polarization (ICP).
Original language | British English |
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Title of host publication | Forward Osmosis |
Subtitle of host publication | Fundamentals and Applications |
Publisher | American Society of Civil Engineers (ASCE) |
Pages | 199-216 |
Number of pages | 18 |
ISBN (Electronic) | 9780784479230 |
ISBN (Print) | 9780784414071 |
DOIs | |
State | Published - 1 Jan 2015 |