RO membrane/polyamide layer synthesis

• Main Author: Zhang, Xin
• Other Authors: Tang Chuyang
• Format: Final Year Project
• Language: English
• Published: 2009
• Subjects: DRNTU::Engineering::Environmental engineering::Water treatment
• Online Access: http://hdl.handle.net/10356/16281
• Institution: Nanyang Technological University

Polyamide Reverse Osmosis membrane synthesis is the primary step for further research on polyamide Forward Osmosis membrane. This project, interfacial polarization of polyamide selective layer, is incorporated with the synthesis of polysulfone substrate layer. To make a good RO membrane, the understanding of the interrelationships between membrane fabrication variables and membrane characteristic is vital. This report try to examine change of water flux and salt rejection with varying chemical concentration, reaction time, post-treatment condition, substrate type. Especially the effect of reaction temperature and substrate contact angle on the RO membrane hydrophilicity is suggested. Chapter 1 introduces the background, objectives and scope of this project. Chapter 2 reviews the concepts of reverse osmosis and forward osmosis, membrane transport model and thin film polarization mechanism. Chapter 3 lists out various experiment procedures, conditions and results from recent journals. Chapter 4 summarizes the experiment procedure, variables and membrane testing methods. Chapter 5 discusses the results mainly on water flux and salt rejection. Chapter 6 discusses reaction temperature and substrate type effect on hydrophilicity. Chapter 7 concludes and suggests further improvements on experiment.