Interpolymer ion exchange membranes for CapMix process

In the presented paper interpolymeric ions exchange membranes were used in a capacitive mixing process. This was reach to increase the amount of energy generated during mixing waters with two different salinities. Membranes were prepared by extrusion of ethylene/styrene-co-divinylbenzene interpolymer followed by chemical modification of obtained foils. The extrudate contained 30 wt% of polystyrene crosslinked with different amount of divinylbenzene. Four pairs of membranes of different thickness were tested in CapMix process. It was found that the best membranes for energy harvesting were obtained from interpolymer with 2 wt% of DVB.