| 세션명 | Graduate Student Oral Session (I) (English) |
|---|---|
| 발표장 | 제9회장 |
| 논문코드 | 1O9-8 |
| 발표일 | 2021-10-21 |
| 발표시간 | 15:45-16:00 |
| 논문제목 | Tailoring molecular structures of hybrid membranes for high performance natural gas separation |
| 발표자 | 유현정 |
| 발표자 소속 | 서강대학교 |
| 저자 | 유현정, 이종석† |
| 소속 | 서강대학교 |
| 논문초록 | Here, we report high-flux and plasticization-resistive super-glassy membranes fabricated by thermally crosslinking a blend of polyimide (PI) and ladder-structured polysilsesquioxane (LPSQ). The crosslinked PI/LPSQ showed enhanced CO2 permeability, as well as hardness and reduced modulus compared to the as-cast membrane. Also, it showed plasticization resistance up to a CO2 feed pressure of 22 bar. Furthermore, carbon molecular sieve (CMS) membranes derived from the PI/LPSQ membrane are demonstrated. DFT calculations suggest electron accumulation at SiOx phases of hybrid CMS membranes hinders the diffusion of CH4 compared to N2 due to a larger electron overlap. Elevating the soaking temperature enhanced the N2/CH4 solubility selectivity due to strong repulsive interaction between the newly formed ultramicropores with CH4. As a result, the hybrid CMS membranes showed an excellent single gas and N2/CH4/C2H6 (20/76/4) mixed gas N2/CH4 selectivity (28 and 16, respectively). |
THE POLYMER SOCIETY OF KOREA