Sorption-diffusion properties of modified hydrogel polyvinylpyrrolidone -containing membranes

The efficiency of using solutions based on mixtures of polyamide with polyvinylpyrrolidone (PVP) in formic acid as modifiers of highly permeable hydrogel membranes based on copolymers of PVP with 2-hydroxyethyl methacrylate was established. The modification ensures the formation of composite membranes with strengthened selectively permeable nano- and microlayers. The possibility of predictable regulation of the sorption-diffusion properties of composite hydrogel membranes by selecting the composition and concentration of the modifying solution and the composition of the hydrogel film substrate is shown.