1. Rational design of the PEBA2533 mixed matrix membrane containing metallo-supramolecular polymers for efficient CO2/H2 separation.
- Author
-
Dong, Liangliang, Gao, Bingbing, Ma, Hua, Liu, Yang, Dong, Yuming, Zhu, Yongfa, Bai, Yunxiang, Zhang, Chunfang, Gao, Haiqi, He, Hongyan, and Meng, Hong
- Subjects
- *
POLYMERS , *ETHYLENE oxide , *CARBON dioxide , *POLYMERIC membranes , *MOLECULAR dynamics , *SEPARATION of gases , *INTERMOLECULAR interactions - Abstract
[Display omitted] • PEBA2533/F127-Tpy-M mixed matrix membranes were prepared for CO 2 /H 2 separation. • F127-Tpy-M can enhance CO 2 separation performance and interfacial adhesion of MMMs. • The MMMs showed better CO 2 /H 2 separation performance than PEBA2533 membrane. Mixed-matrix membranes (MMMs) are an effective method for overcoming the trade-off limitations of conventional polymeric membranes and are attractive for CO 2 /H 2 separation. However, major challenges remain in achieving high gas separation performance and long-term stability owing to undesirable polymer/filler interfaces. In this study, a novel metallo-supramolecular polymer (F127-Tpy-M) was designed and selected to engineer a polymer/filler interface. Benefiting from strong intermolecular interactions, F127-Tpy-M dispersed well in the PEBA2533 matrix with a defect-free interface. By synergistically combining the dipole–quadrupole effect of the ethylene oxide groups in F127 and gas–metal interactions, MMMs could significantly improve the gas separation performance. In comparison with the pristine membrane, the MMM with 60% F127-Tpy-M loading exhibited 175–194% and 215–259% increases in CO 2 /H 2 selectivity and CO 2 permeability, respectively, which far surpass the 2008 Robeson upper bound. The molecular dynamics simulations supported the experimental data, confirming that F127-Tpy-M is a promising candidate for designing next-generation high-performance MMMs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF