| 초록 |
The polymerionic liquid gel membrane is made of a room temperature ionic liquid (1-ethyl-3-methylimidazolium tetrafluoroborate) with physically dispersing in a host polymer (poly(vinylidene fluoride)-hexafluoropropyl copolymer). As the contents of ionic liquid in polymer gels increases, the selectivity of membrane exceeds the ‘upper bound’, which sets up the limit of general trade-off in between permeability and selectivity. This is due to the solubility selectivity of ionic liquid in polymer gels. The selectivity of membrane with the 2:1 ratio of between ionic liquid and polymer exceeds the upper bound for CO2/N2 separation, which has never achieved before for this CO2 permeability range. In addition, the permeability of this membrane was noticeably different from that of the 0.5:1 membrane(about 9 times greater). The permeability of CO2 was abruptly increased without decrease of the selectivity and these phenomena were observed firstly in the fields. This simple strategy can be easily used to make extraordinary polymeric membranes. |
