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X-ray study of the influence of water on the cellulose membrane structure

X-ray study of the influence of water on the cellulose membrane structure J O U R N A L O F M AT E R I A L S S C I E N C E L E T T E R S 1 6 ( 1 9 9 7 ) 1 9 4 5 ± 1 9 4 7 X-ray study of the in¯uence of water on the cellulose membrane structure H. GRIGORIEW, A. G. CHMIELEWSKI Institute of Nuclear Chemistry and Technology, Dorodna 16, 03±195 Warsaw, Poland In spite of its application in technology the process of water permeation through a cellulose membrane has not been explained fully. Hydrophilic membranes play an important role in membrane processes. Recently, a swollen dry-layer model has been developed to describe permeation process through such membranes [1]. In the process, the permeation has been described generally as the sorption of liquid, its diffusion, and the evaporation and desorption of vapour. According to this model the layer containing liquid water in the swollen membrane exists on the upstream side of the membrane and another layer with vapour water on the downstream side. Also an isotope effect of H±D and 18 O± 16 O in the permeation process was observed, for the cellulose membranes Tomophan http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science Springer Journals
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