Properties of membranes from polyelectrolyte complexes consisting of methyl glycol chitosan, [2‐(diethylamino)ethyl]dextran, and poly(potassium vinyl sulfate)

Abstract

Water-insoluble polyelectrolyte complexes (PEC) were prepared by mixing methyl glycol chitosan (MGC, 1) and [2-(diethylamino)ethyl]dextran @A, 2) with poly(potassium Vinyl sulfate) (PVSK, 3) in aqueous solution at various hydrogen ion concentrations. Elemental analyses, IR spectroscopy, and solubilities of PEC reveal that PEC differ in molecular structure and properties according to pH. It seems that the degree of dissociation and the conformation of MGC, EA, and PVSK change with pH. PEC membranes were made by casting from solutions of all kinds of PEC, and transport phenomena through the membrane of PEC prepared in 4 wt.-Vo HCl solution were investigated under various conditions. The driving force of the transport depends on the membrane potential, Donnan potential, and diffusion potential, according to measurements of the transport ratio of Na+ and the electric potential difference between the left-and right-hand side of the membrane. Moreover, the permeability of K + is higher than that of Na+ .

Chitosan: The Most Valuable Derivative of Chitin

“…Chitosan has been modified by graft copolymerization and by blending with water-soluble polymers [166]. Several studies of chitosan/poly(vinyl alcohol) (PVA) blended membranes have been reported [167][168][169]. According to Miya et al [163], chitosan forms a clear homogenous blend with PVA, and the tensile strength of the blend is greater than the component value.…”

Functional Polymers Based on Dextran

“…DEAE dextran with CMD [340,341], sodium dextran sulfate, poly(styrene sulfonate) (NaSS) [342], poly(sodium L-glutamate) (PSLG), poly(vinyl alcohol)sulfate [343], or potassium metaphosphate (MPK) [240]. They are useful as membranes or in biomedical applications [343,344].…”

Preparation and properties of macromolecular complexes consisting of chitosan derivatives, iron(III) hydroxide sulfate, and poly(potassium vinyl sulfate)

“…There have been many investigations on the preparation, properties, and applications of MC's consisting of an organic polycation and an organic polyanion, and t h e complexes are expected to be useful as functional and biomedical materials We have previously reported on the preparation, structures, and properties of a series of MC's consisting of organic niacromolecules [3][4][5][6]. So far, however, researches on the polyionic interaction between an organic macromolecule and an inorganic macromolecule have little been known ' 3 *I, and only a few applications of those complexes containing chitosan have been reported','0).…”

“…We have previously reported on the preparation, structures, and properties of a series of MC's consisting of organic niacromolecules [3][4][5][6]. So far, however, researches on the polyionic interaction between an organic macromolecule and an inorganic macromolecule have little been known ' 3 *I, and only a few applications of those complexes containing chitosan have been reported','0).…”