| 초록 |
In reverse osmosis (RO) membranes, hydrophilic chains containing ionic moieties help filtering heavy ions from water, which is so called “nanofilteration”. Major drawbacks in RO membranes, however, are known to be poor stability and lack of long term durability due to the clogging of ionic moieties upon absorbing heavy ions. Here, we have reported new series of RO membranes consist of cross-linked ionic block copolymers. Ionic moieties in block copolymers provide the affinity with heavy ion in water and the existence of cross-linked hydrophobic chains greatly enhances mechanical properties of the RO membranes when they are soaked in water. The morphologies of cross-linked ionic block copolymer are investigated by combining SAXS (in dry state) and in-situ SANS equipped with pressure cell (in wet state) to quantify the relationship between structures and filtration properties. |
