SEPARATION OF METAL ALGINATE IONOTROPIC GELS TO POLYMEMBRANES WITH SPECIAL EVIDENCE ON THE POSITION OF CHELATION IN COPPER ALGINATE COMPLEX

A descending technique has been used to make multilayer ionotropic membranes within capillary structure from the gelation of macromolecular chains of alginate sol and electrolytes of divalent metal ions. A successful method was introduced to separate these polymembranes into layers. The electron-microscopical investigation confirms that the chelation in such gel membrane complexes occurred between the divalent metal ion, and two carboxylate and two hydroxyl groups of two neighboring units of the same macromolecular chain.