Abstract
In this study, we prepared poly （vinyl alcohol）（PVA）-based charged mosaic （CM） membrane from positively- and negatively-charged PVA-based block-copolymers by means of dispensing technique. The technique enables the fabrication of well-designed and tunable striped patterns by coating the two PVA-based polymers as anion- and cation-exchange domains. In addition, the main matrix of PVA allows a subsequent chemical crosslinking between the respective domains, resulting in good adhesion between the domains for easy handling. The prepared CM membranes had high permselectivity for electrolytes and the electrolyte flux depended not on the ratio of ion exchange capacity or the coating distance of the two charged domains but on the membrane potential.
