| 第一作者： | Jiao, CL (Jiao, Chengli); Li, ZD (Li, Zedong); Li, XX (Li, Xinxin); Wu, M (Wu, Mian); Jiang, HQ (Jiang, Heqing); |
|---|---|
| 联系作者： | Jiao, CL (Jiao, Chengli); Li, ZD (Li, Zedong); Li, XX (Li, Xinxin); Wu, M (Wu, Mian); Jiang, HQ (Jiang, Heqing); |
| 发表年度： | 2021 |
| 卷： | 259 |
| 页： | - |
| 摘要： | Poor interfacial compatibility that often led to low gas separation performance is one of key challenges for developing composite membranes. In the present study, nanosized polyethyleneimine (PEI) functionalized ZIF-8 (PEI-ZIF-8) with good dispersion, having a particle size around 15 nm, has been synthesized via in-situ method and used as filler to fabricate Pebax/PEI-ZIF-8 composite membranes. Excluding the intrinsic porous structure and higher affinity with CO2 of PEI-ZIF-8 beneficial for CO2 selective transport, the large density of amine groups on PEI chains provide a good interfacial compatibility, and introduce facilitated CO2 transport path. Furthermore, PEI-ZIF-8 reduces the crystallinity of Pebax matrix, which is favorable for CO2 transport. The composite membrane with 5 wt% PEI-ZIF-8 shows a CO2 permeance of 13.0 GPU with a CO2/N-2 selectivity of 49.0, which increases by 80.6% and 118.8% respectively in contrast with pristine Pebax membrane. The results demonstrate that nanoparticles functionalized by amine-polymer with long chains is effective for constructing composite membranes with good interfacial compatibility. |
| 刊物名称： | SEPARATION AND PURIFICATION TECHNOLOGY |
| 影响因子： | 5.107 |
| 全文链接： | https://linkinghub.elsevier.com/retrieve/pii/S1383586620326630 |
