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http://dx.doi.org/10.14579/MEMBRANE_JOURNAL.2014.24.4.292

Preparation of Disulfonated Poly(arylene ether sulfone) Random Copolymer Thin Film Composite Membranes Using a Benign Solvent  

Lee, Chang Hyun (Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University)
McGrath, James E. (Macromolecules and Interfaces Institute, Virginia Polytechnic Institute and State University)
Freeman, Benny (Department of Chemical Engineering, Center for Energy and Environmental Resources, University of Texas at Austin)
Publication Information
Membrane Journal / v.24, no.4, 2014 , pp. 292-300 More about this Journal
Abstract
Chlorine-resistant sulfonated poly(arylene ether sulfone) random copolymer (SPAES)-thin film composite (TFC) membranes for desalination are prepared using monoglyme as a selective solvent, which dissolves SPAES, but should be inert to porous polysulfone layer (e.g., Udel$^{(R)}$). Different from formic acid and diethylene glycol used as other selective solvents, monoglyme is environmentally friendly and has much lower boiling temperature. After a pretreatment of Udel$^{(R)}$ support film in isopropyl alcohol-glycerine mixture to minimize pore penetration leading to fairly reduced water flux, coating of SPAES solution in monoglyme onto the support and stepwise drying processes are conducted for defect-free TFC formation. The transport behavior through SPAES-TFC membranes is observed, correlating with the effects of sulfonation level, protonation, and physical and chemical crosslinking of SPAES selective layers.
Keywords
Desalination; Thin film composite; Poly(arylene ether sulfone) random copolymer; Monoglyme; crosslinking;
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