Reverse osmosis by composite charged membranes

✍ Scribed by Hiroshi Nomura; Manabu Senō; Hiroshi Takahashi; Takeo Yamabe

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 544 KB
• Volume: 29
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/s0011-9164(00)82240-7

✦ Synopsis

The chaxged metimes were prepared from the s~onation and an&&ion of SBR resins, and their reverse osmosis performances were investiiated. The sulfonated membranes show high salt rejection. This result is in accord with the result of membrane potentials. Relatively excelIent membranes were ohtained by amination of the sulfonated membranes. This is probably owing to the formation of a dense charged region near the membrane surface; the composite charged membranes of sandwich-type are obtained by this method. The reverse osmosis performances of these membranes from various materials were made clear_