Development of thin-film composite membranes for carbon dioxide and methane separation using sulfonated poly(phenylene oxide)

• Published in: Journal of applied polymer science Vol. 76; no. 5; pp. 735 - 742
• Main Authors: Rhim, Ji-Won, Chowdhury, Geeta, Matsuura, Takeshi
• Format: Journal Article
• Language: English
• Published: New York John Wiley & Sons, Inc 02.05.2000; Wiley
• Subjects: Applied sciences; CO2/CH4 separation; Exact sciences and technology; Exchange resins and membranes; Forms of application and semi-finished materials; gas separation membranes; high selectivity; Polymer industry, paints, wood; sulfonated poly(phenylene oxide); Technology of polymers; thin film composite membranes; Methane; Transport properties; Carbon dioxide; Experimental study; Fabrication property relation; Sulfonate copolymer; Gas permeability; Chemical modification; Pressure effect; Phenylene oxide(dimethyl) copolymer; Preparation; Selective permeability; Counter ion; Membrane; Sulfonation; Phenylene oxide(dimethyl) polymer
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/(SICI)1097-4628(20000502)76:5<735::AID-APP16>3.0.CO;2-N

Novel membranes based on sulfonated poly (phenylene oxide) (SPPO) was developed. SPPO membranes in the hydrogen form were converted to metal ion forms. The effect of exchange with metal ions including monovalent (Li+, Na+, K+), divalent (Mg2+, Ba2+, Ca2+) and trivalent (Al3+) ions was investigated in terms of permeation rate and permeation rate ratios for CO2 and CH4 gases. Both dense homogeneous membranes and thin‐film composite (TFC) membranes were studied for their gas separation characteristics. The effect of membrane preparation conditions and operating parameters on the membrane performance were also investigated. The selectivity of the TFC membrane increased as the cationic charge density increased as a result of electrostatic cross‐linking. TFC membrane of very high selectivity was achieved by coating a thin layer of SPPO‐Mg on a PES substrate. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 76: 735–742, 2000