Transport properties of nanofiltration plasticized polyvinyl chloride membranes, molecular sieves

The modification of surfaces of solid-state potentiometric surfactant sensors with nanofiltration membranes (molecular sieves) with different diameters allows the detection of homologues of anionic, cationic, and nonionic surfactants. The quantitative characteristics of the membrane transport (permeability and ion flow) and the separating ability of plasticized polyvinyl chloride molecular sieves are evaluated. The permeabilities of nanofiltration membranes and ion flows through them depend on the nature of the blowing agent and the nature and concentration of the surfactants in the contacting solutions whose variation allows the separation of homologues of sodium alkyl sulfates, alkylpyridinium chlorides, and polyethoxylated nonylphenols in multicomponent mixtures.