New composite reverse osmosis membranes made from poly-2-vinylimidazoline

✍ Scribed by M. J. Hurndall; E. P. Jacobs; R. D. Sanderson

• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 525 KB
• Volume: 46
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1992.070460319

✦ Synopsis

SY N OPSlS

Novel ultra-thin film (UTF) composite reverse osmosis (RO) membranes were fabricated in situ by the interfacial polymerization of poly-2-vinylimidazoline ( PVI ) precursors and aromatic acid chloride crosslinking agents. The syntheses of three different forms of PVI, which were used as precursors, are described. 3-( Chlorosulphonyl) benzoyl chloride, 3,5di ( chlorosulphonyl ) benzoyl chloride and 1,3-benzenedicarbonyl dichloride were used as crosslinking agents. Both flat-sheet and tubular membranes were fabricated and tested for their salt retentions and permeate fluxes. The RO performances of the two sets of tubular membranes PVI I and PVI I1 crosslinked with 3-(chlorosulphonyl) benzoyl chloride, prepared according to optimized fabrication formulations, were recorded. These were 97.1 +-0.1% retention; 730 ? 24 lmd flux and 98.2 ? 0.7% retention; 560 +-150 L/m2/day (lmd) flux, respectively. The RO performances of initial tubular membranes made from PVI I11 and 3-(chlorosulphonyl) benzoyl chloride was 97.0 ? 1.1% retention and 643 +-74 lmd flux.