New polymer materials for reverse osmosis membranes

The results of investigations on new polymer materials suitable for reverse osmosis are reported. The studies particularly concerned polypiperazinamides derived from differently structured bicarboxylic acids. Such polyamides show a water permeability that may vary from 0.09 μg cm −1 sec −1 to 2.3 μg...

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Bibliographic Details
Published inDesalination Vol. 14; no. 2; pp. 137 - 150
Main Authors Credali, L., Chiolle, A., Parrini, P.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.01.1974
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Summary:The results of investigations on new polymer materials suitable for reverse osmosis are reported. The studies particularly concerned polypiperazinamides derived from differently structured bicarboxylic acids. Such polyamides show a water permeability that may vary from 0.09 μg cm −1 sec −1 to 2.3 μg cm −1 sec −1 depending on the structure. The results obtained from reverse osmosis tests on dense and homogeneous films are described. Anisotropic membranes were prepared from poly( trans-2,5-dimethyl-piperazin-thiofurazanamide). Their properties very closely approach those of the corresponding cellulose acetate membranes. The anisotropic structure of the membranes has been evidenced by stereoscan electron microscope analysis.
ISSN:0011-9164
1873-4464
DOI:10.1016/S0011-9164(00)82047-0