Basic Alkylamine Functionalized PAF‐1 Hybrid Membrane with High Compatibility for Superior CO2 Separation from Flue Gas. (20th November 2022)

• Record Type: Journal Article
• Authors: Zhang, Panpan; Zhang, Chi; Wang, Lei; Dong, Junchao; Gai, Dongxu; Wang, Wenjian; Nguyen, Thien S.; Yavuz, Cafer T.; Zou, Xiaoqin; Zhu, Guangshan
• Is Part Of: Advanced functional materials. Volume 33:Number 4(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-20
• Subjects: CO 2 capture -- gas permeation -- interfacial compatibility -- mixed‐matrix membranes -- porous aromatic frameworks; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202210091
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: 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‐CH2 NH2 that has a high surface area of over 1400 m 2 g –1 and unique CO2 adsorption with CO2 /N2 thermodynamic selectivity of over 1000. Amidation reaction is developed for PAF‐1‐CH2 NH2 cross linking with cPIM‐1 (carboxylic polymer of intrinsic microporosity), giving a homogenous compatible membrane of PAF‐1‐CH2 NH2 —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. Abstract : Alkylaminated PAF‐1 boosts membrane CO2 separation: An alkylaminated porous aromatic framework‐1 (PAF‐1) is successfully synthesized, and it plays dual roles in preferential CO2 adsorption and reinforced membrane compatibility. Superior CO2 /N2 separation in terms of high selectivity and exceptional permeability is achieved after incorporation of alkylaminated PAF‐1 into a polymer membrane.