Curable compositions and membranes

Abstract

A curable composition comprising the components (i) 0 to 60 wt% non-ionic crosslinker(s); (ii) 20 to 85 wt% curable ionic compound(s) comprising an anionic group and at least one ethylenically unsaturated group; (iii) 15 to 45 wt% solvent(s); (iv) 0 to 10 wt% of photoinitiator(s); and (v) 2 to 45 wt% of structure modifier(s); wherein the molar ratio of component (v) : (ii) is 0.25 to 0.65. The compositions are useful for preparing membranes for (reverse) electrodialysis.

Description

technical field [0001] The present invention relates to curable compositions, the use of the curable compositions for the production of films and the use of such films. Background technique [0002] Reverse electrodialysis ("RED") is a known technique for generating electricity by mixing two ionic solutions of different salt concentrations. The technique typically uses a reverse electrodialysis unit that includes a membrane stack of alternating cation and anion exchange membranes, electrodes (usually at each end of the stack), a first pass through the reverse electrodialysis unit for a concentrated ionic solution channel, and a second channel for the dilute ionic solution through the reverse electrodialysis unit. When a concentrated ionic solution is fed through the first channel and a dilute ionic solution is fed through the second channel, the solute from the concentrated solution in the first channel migrates through the membrane to the dilute solution in the second chan...

AI Technical Summary

Problems solved by technology

[0003] One of the problems encountered with the membranes currently used for RED is their very high resistance to multivalent ions, especially magnesium ions

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