Porous organic framework membranes based on interface-induced polymerisation: design, synthesis and applications

Liu, Lin; Yu, Ruihe; Yin, Liying; Zhang, Ning; Zhu, Guangshan

doi:10.1039/d3sc05787a

“…Both porous and nonporous nanofillers have been applied as nanofillers in MMMs, with porous nanofillers including metal–organic frameworks (MOFs), porous organic frameworks (POFs), covalent organic frameworks (COFs), and zeolites while nonporous nanofillers including fumed silica, graphene oxide, and carbon nanotubes (CNTs) . Zeolites, with more than 80 years of development and over 260 nature and synthetic crystal structures, have been intensively studied and applied in many separation applications …”

Section: Introductionmentioning

confidence: 99%

Mixed Matrix Membranes Based on Nanoparticle, Nanorod, and Nanosheet MFI-Type Zeolites for Gas Separation

Guo,

Feng,

Shen

et al. 2024

Ind. Eng. Chem. Res.

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Membranes have been considered as promising alternatives for natural gas sweetening. Mixed matrix membranes (MMMs) possess superior gas separation performance and the potential to combine varieties of polymers and filler materials. In the current work, MMMs have been fabricated via employing Troger's base (TB) polymer and zeolites with three different morphologies. Simultaneously, CO 2 /CH 4 and H 2 /CH 4 separation performances of the obtained MMMs were comprehensively investigated. It is found out that the presence of the MFI-type zeolites significantly improved the gas permeability, but the selectivity was somehow reduced. Among the three different nanofillers, nanosheet zeolite-based MMMs presented the highest gas permeability; with 20 wt % nanosheet zeolites, both CO 2 and H 2 permeabilities were increased to 348.6 and 441.5 Barrer, which were improved by 522.0 and 256.2%, respectively. In addition, SEM, XRD, FTIR, and TGA were also employed to characterize the obtained MMMs.

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Ultrathin Free‐Standing Porous Aromatic Framework Membranes for Efficient Anion Transport

Du,

Liu,

Yin

et al. 2024

Angewandte Chemie

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Porous aromatic frameworks (PAFs) show promising potential in anionic conduction due to their high stability and customizable functionality. However, the insolubility of most PAFs presents a significant challenge in their processing into membranes and subsequent applications. In this study, continuous PAF membranes with adjustable thickness were successfully created using liquid‐solid interfacial polymerization. The rigid backbone and the stable C−C coupling endow PAF membrane with superior chemical and dimensional stabilities over most conventional polymer membranes. Different quaternary ammonium functionalities were anchored to the backbone through flexible alkyl chains with tunable length. The optimal PAF membrane exhibited an OH‐ conductivity of 356.6 mS∙cm‐1 at 80 °C and 98% relative humidity. Additionally, the PAF membrane exhibited outstanding alkaline stability, retaining 95% of its OH− conductivity after 1000 hours in 1M NaOH. To the best of our knowledge, this is the first application of PAF materials in anion exchange membranes, achieving the highest OH− conductivity and exceptional chemical/dimensional stability. This work provides the possibility for the potential of PAF materials in anionic conductive membranes.

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Ultrathin Free‐Standing Porous Aromatic Framework Membranes for Efficient Anion Transport

Du,

Liu,

Yin

et al. 2024

Angew Chem Int Ed

Self Cite

0

View full text Add to dashboard Cite

Porous aromatic frameworks (PAFs) show promising potential in anionic conduction due to their high stability and customizable functionality. However, the insolubility of most PAFs presents a significant challenge in their processing into membranes and subsequent applications. In this study, continuous PAF membranes with adjustable thickness were successfully created using liquid‐solid interfacial polymerization. The rigid backbone and the stable C−C coupling endow PAF membrane with superior chemical and dimensional stabilities over most conventional polymer membranes. Different quaternary ammonium functionalities were anchored to the backbone through flexible alkyl chains with tunable length. The optimal PAF membrane exhibited an OH‐ conductivity of 356.6 mS∙cm‐1 at 80 °C and 98% relative humidity. Additionally, the PAF membrane exhibited outstanding alkaline stability, retaining 95% of its OH− conductivity after 1000 hours in 1M NaOH. To the best of our knowledge, this is the first application of PAF materials in anion exchange membranes, achieving the highest OH− conductivity and exceptional chemical/dimensional stability. This work provides the possibility for the potential of PAF materials in anionic conductive membranes.

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Porous organic framework membranes based on interface-induced polymerisation: design, synthesis and applications

Abstract: Interfacial polymerisation has become an important method for the preparation of porous organic framework (POF) membranes. We summarise the strategies and applications in forming POF membranes induced by different interfaces.

Cited by 6 publications

References 111 publications

Mixed Matrix Membranes Based on Nanoparticle, Nanorod, and Nanosheet MFI-Type Zeolites for Gas Separation

Mixed Matrix Membranes Based on Nanoparticle, Nanorod, and Nanosheet MFI-Type Zeolites for Gas Separation

Ultrathin Free‐Standing Porous Aromatic Framework Membranes for Efficient Anion Transport

Ultrathin Free‐Standing Porous Aromatic Framework Membranes for Efficient Anion Transport

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