Acrylonitrile- and polyvinylidene fluoride-derived membranes.

摘要

Membranes which are useful as the underlying membrane, in a composite formed by coating an underlying membrane and subjecting the coated membrane to a crosslinking treatment, are microfiltration, ultrafiltration and reverse osmosis membranes which are made from at least one polymer selected from crosslinked (optionally substituted) acrylonitrile homopolymers and copolymers, and crosslinked (optionally sulfonated) polyvinylidene fluoride. The membranes derived from nitrile polymers/copolymers may be used also for separating insoluble particles, colloidal particles and solute molecules from organic solvents; and for separating insoluble particles, colloidal particles and soluble polymers from aqueous media (e.g. juices and other extracts of fruit and vegetable origin), dissolved salts and organic compounds of MW < 5000 remaining in the media.