Water transport in porous and non-porous membranes

✍ Scribed by G. Thau; R. Bloch; O. Kedem

• Book ID: 104113071
• Publisher: Elsevier Science
• Year: 1966
• Tongue: English
• Weight: 818 KB
• Volume: 1
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/s0011-9164(00)84012-6

✦ Synopsis

Insfirutc o/ Scirncr, Rehoror (Israe/) (Rwzivcd April 28, 1966) c)snwkc x~tcr tlow. gisiog the filtration coefEcicnt, and the diffusion of iwtopic water wefe measured in a numhcr of membrwcs. It is shcwn 11~1 the ratio, 4. bctuan osmotic and self-drffusion flux, obscncd under form of equal magm~udc, ma> wnc ac a measure for the mutual interaction bct*een uaw molccuks pcnctraring the memb;:ac, ac compared IO the interaction with the membrane ~on4titwnts. High values WCTC found for R III porous tilns. In liquid mcmbrancs, 6 is small but does not equal unity. Hcncc, in drtfusion of water through the& organic liquids, ~atcr-wWx inreracrions are of the \r\mc order as u-;lter-solwrit interactions. in one pofjmcr membrane, pol>ert:>Ia~fate. .r? 4s close to one. as would be expected for molecular dtffuJion sn drlulc wlu~ton. ln cellulose acctasc films. g is only slightly higher than in an analogous liquid me&wane (Irwctincr) indicating that hew water transport IF essentially diffusion ir. a homogsncous phax.