Abstract

For piezodialysis to become a useful water desalination process, the most critical requirement is the development of appropriate membranes. The membrane presently being sought is a mosaic of cation-passing and anion-passing resins, each resin having a high degree of coupling between the mobile counterions and water. Of a wide variety of possible fabrication techniques, three are of particular interest: phase separation, pattern molding and latex-polyelectrolyte fabrication. The latex-polyelectrolyte fabrication technique has produced membranes which bring piezodialysis close to practical reality.

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