Basic Alkylamine Functionalized PAF-1 Hybrid Membrane with High Compatibility for Superior CO2 Separation from Flue Gas

Panpan Zhang, Chi Zhang, Lei Wang, Junchao Dong, Dongxu Gai, Wenjian Wang, Thien Si Nguyen, Cafer Tayyar Yavuz, Xiaoqin Zou, Guangshan Zhu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Functionalized porous aromatic frameworks (PAFs) are excellent candidate materials for hybrid membrane fabrication. However, tailoring PAFs for membrane CO2 separation with desirable performance is still a challenge. Here, facile fabrication of functional hybrid alkylamine-modified PAF-1 containing membranes with high compatibility for efficient CO2/N2 separation is reported. The methylamino groups are installed on PAF-1 resulting in PAF-1-CH2NH2 that has a high surface area of over 1400 m2 g–1 and unique CO2 adsorption with CO2/N2 thermodynamic selectivity of over 1000. Amidation reaction is developed for PAF-1-CH2NH2 cross linking with cPIM-1 (carboxylic polymer of intrinsic microporosity), giving a homogenous compatible membrane of PAF-1-CH2NH2—cPIM-1 with outstanding CO2 permeability (≈10790 Barrer) and high CO2/N2 permselectivity (≈43). This membrane outperforms the counterparts derived from parent PAF-1 and phenylamine PAF-1 and possesses superior performance to other relevant membranes for CO2/N2 separation. Such a membrane can selectively and stably separate CO2 from N2 in a simulated flue gas mixture, demonstrating its huge potential in carbon capture.
Original languageEnglish (US)
Pages (from-to)2210091
JournalAdvanced Functional Materials
StatePublished - Nov 20 2022

Bibliographical note

KAUST Repository Item: Exported on 2022-11-29
Acknowledgements: P.P.Z., C.Z., and L.W. contributed equally to this work. The authors would like to thank the financial supports from the National Natural Science Foundation of China (NSFC grant nos. 21971035, 22131004, U21A20330) and “111” Program (B18012).

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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