Ion-selective membranes, their production process, use of the ion-selective membranes, and apparatuses provided with the ion-selective membranes

An ion-selective membrane comprising

• at least one ionic polymer component selected from the group consisting of a cationic polymer component and an anionic polymer component;
• a matrix component;
• and
• a woven-fabric-shaped backing in the matrix component, wherein
• each of the at least one ionic polymer component comprises particles evenly dispersed in the matrix component, where the particles have an average particle size in a range of from 0.01 to 10 μm;
• the woven-fabric-shaped backing has a meshed structure;
• the cationic polymer component is prepared from monomers of chloromethylstyrene and divinylbenzene;
• the anionic polymer component is prepared from monomers of styrene, acrylonitrile, hydroxyethylmethacrylate and divinylbenzene;
• the matrix component comprises at least one polymer selected from the group consisting of polysulfone resins, polyarylate resins, polyamide resins, polyimide resins, polyamide-imide resins, polyurethane resins, fluorinated resins, silicone resins, and hydrogenation products of homopolymer or copolymer resins of diene monomers;
• and
• the ion-selective membrane is produced by a process comprising contacting with the woven-fabric-shaped backing a coating formulation consisting of a mixture or dispersion of the particles of the at least one ionic polymer component, the matrix component and a solvent.