| 초록 |
In membrane capacitive deionization (MCDI) cells, ion-exchange membranes are placed between each carbon electrode and a spacer , which leads to an increased flux of counter ions. The membranes prevent the adsorption of co-ions onto the opposite electrode during desorption process, which results in the efficient removal of ions from the feed solution. However, the commercial membranes are expensive, and limit their use for MCDI cells. In this study, anion- and cation-exchange polymer membranes were synthesized. The anion-exchange membranes were from polymerization of styrene and 4-vinylpyridine, followed by addition of 2-chloroethanol. The cation-exchange polymer was synthesized from styrene, 4-vinylbenzene sulfonate and 2-hydroxylethyl methacrylate. The new membranes were characterized with respect to ion-exchange capacity, water-absorption, dimensional stability. MCDI cells were also assembled using the membranes. The details on the results will be presented. |
