Characteristics of PFI Composite Reverse Osmosis Membrane

✍ Scribed by Lu Xueren; Gao Congjie

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 420 KB
• Volume: 62
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/0011-9164(87)87020-0

✦ Synopsis

Reinforced polysulfone

(PS) membranes with asymetric porosity and an average pore radius of 300-1500 A were prepared by the method of continuous casting of the membrane on polyester web at ambient temperature.

The PS membrane possesses fairly good chemical stability and is resistant to heat. The membrane can be used as a supporting membrane for RO composite membranes. The ultrathin semi-permeable barrier of the PFI composite membrane was formed on the porous surface of the reinforced PS membrane by using an in situ polymerization technique. The effects of operating pressure, temperature, concentration and pH values of the feedwater on PFI membrane performance were observed, and at the same time, resistance to oxidation and chloridization, and long-term storage stability were tested.