Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/67440
Title: Factors influencing the production of polyethersulfone microfiltration membranes by immersion phase inversion process
Authors: Zhang, H. 
Lau, Wayne W.Y. 
Sourirajan, S. 
Issue Date: Jan-1995
Source: Zhang, H.,Lau, Wayne W.Y.,Sourirajan, S. (1995-01). Factors influencing the production of polyethersulfone microfiltration membranes by immersion phase inversion process. Separation Science and Technology 30 (1) : 33-52. ScholarBank@NUS Repository.
Abstract: Polyethersulfone microfiltration (MF) membranes can be produced from polyethersulfone/solvent/nonsolvent systems by the immersion phase inversion process in a water bath. When the casting solution composition is adjusted close to phase separation, a fast gelation in water occurs which hinders further polymer enrichment at the interface between polymer solution and water; an open-cell MF membrane structure is thus retained. Addition of a certain amount of a water-soluble polymer, polyvinylpyrrolidone, to the casting solution will further change the demixing rate and gelation rate of the casting solution in water. Such an addition improves the open-cell structure of the membranes. Besides dope composition, the performance of these MF membranes is also dependent on the casting conditions.
Source Title: Separation Science and Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/67440
ISSN: 01496395
Appears in Collections:Staff Publications

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