Boosting gas separation performance and suppressing the physical aging of polymers of intrinsic microporosity (PIM-1) by nanomaterial blending

Ahmad, Mohd Zamidi; Castro‐Muñoz, Roberto; Budd, Peter M.

doi:10.1039/d0nr07042d

Cited by 99 publications

(51 citation statements)

References 202 publications

(299 reference statements)

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“…However, gas transportation in PIM-1 membranes is underpinned by the solution–diffusion mechanism, where high permeability is typically associated with low selectivity and vice versa ( 13 , 14 ). In addition, inefficient packing of PIM-1 chains leads to a nonequilibrium state where molecular relaxation occurs over time, reaching an equilibrium state ( 15 ) and causing fractional free volume and permeability losses, i.e., physical aging ( 12 , 16 – 18 ).…”

mentioning

confidence: 99%

Symbiosis-inspired de novo synthesis of ultrahigh MOF growth mixed matrix membranes for sustainable carbon capture

Zhu

Jiang

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

135

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Mixed matrix membranes (MMMs) are one of the most promising solutions for energy-efficient gas separation. However, conventional MMM synthesis methods inevitably lead to poor filler–polymer interfacial compatibility, filler agglomeration, and limited loading. Herein, inspired by symbiotic relationships in nature, we designed a universal bottom-up method for in situ nanosized metal organic framework (MOF) assembly within polymer matrices. Consequently, our method eliminating the traditional postsynthetic step significantly enhanced MOF dispersion, interfacial compatibility, and loading to an unprecedented 67.2 wt % in synthesized MMMs. Utilizing experimental techniques and complementary density functional theory (DFT) simulation, we validated that these enhancements synergistically ameliorated CO2 solubility, which was significantly different from other works where MOF typically promoted gas diffusion. Our approach simultaneously improves CO2 permeability and selectivity, and superior carbon capture performance is maintained even during long-term tests; the mechanical strength is retained even with ultrahigh MOF loadings. This symbiosis-inspired de novo strategy can potentially pave the way for next-generation MMMs that can fully exploit the unique characteristics of both MOFs and matrices.

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mentioning

confidence: 99%

Symbiosis-inspired de novo synthesis of ultrahigh MOF growth mixed matrix membranes for sustainable carbon capture

Zhu

Jiang

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

135

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“…Recently, various research groups provided detailed reviews of PIM materials for membrane‐based separations. [ 9,36,38,39,52,90–94 ] Here, we summarize the gas transport properties of the most recently reported ladder PIMs and PIM–PIs, and highlight the development and performance of thermally treated PIM membrane materials, specifically CMS membranes with respect to their performance in highly energy‐intensive separation processes. A brief overview on the development of thin film composite (TFC) membranes made by interfacial polymerization using PIM‐motif building blocks for potential use in liquid membrane applications, that is, nanofiltration and RO, is included in our discussion.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress on Polymers of Intrinsic Microporosity and Thermally Modified Analogue Materials for Membrane‐Based Fluid Separations

et al. 2021

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Solution‐processable amorphous glassy polymers of intrinsic microporosity (PIMs) are promising microporous organic materials for membrane‐based gas and liquid separations due to their high surface area and internal free volume, thermal and chemical stability, and excellent separation performance. This review provides an overview of the most recent developments in the design and transport properties of novel ladder PIM materials, polyimides of intrinsic microporosity (PIM–PIs), functionalized PIMs and PIM–PIs, PIM‐derived thermally rearranged (TR), and carbon molecular sieve (CMS) membrane materials as well as PIM‐based thin film composite membranes for a wide range of energy‐intensive gas and liquid separations. In less than two decades, PIMs have significantly lifted the performance upper bounds in H2/N2, H2/CH4, O2/N2, CO2/N2, and CO2/CH4 separations. However, PIMs are still limited by their insufficient gas‐pair selectivity to be considered as promising materials for challenging industrial separations such as olefin/paraffin separations. An optimum pore size distribution is required to further improve the selectivity of a PIM for a given application. Specific attention is given to the potential use of PIM‐based CMS membranes for energy‐intensive CO2/CH4, N2/CH4, C2H4/C2H6, and C3H6/C3H8 separations, and thin film composite membranes containing PIM motifs for liquid separations.

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“…Although high permeability and selectivity levels have been achieved in GO-based MMMs (in comparison with neat polymeric membranes), freestanding or micrometer-thick membranes still suffer from the low permeance of the membrane itself, which is a serious issue in industrial applications. − This has resulted in surface coating of a GO-based selective layer on a highly porous polymer substrate emerging as a countermeasure to improve membrane gas permeance. For example, Lin’s group recently reported the fabrication of GO-based composite membranes using vacuum filtration to obtain a thin selective layer .…”

Section: Introductionmentioning

confidence: 99%

Ultrathin, Highly Permeable Graphene Oxide/Zeolitic Imidazole Framework Polymeric Mixed-Matrix Composite Membranes: Engineering the CO₂-Philic Pathway

Lee

Song

Park

et al. 2021

ACS Sustainable Chem. Eng.

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High-performance, thin-film mixed-matrix membranes (MMMs) on a porous support have been developed, using zeolitic imidazole framework (ZIF) decorated graphene oxide (GO) as a filler, dispersed in a poly(vinyl imidazole)-copoly(oxyethylene methacrylate) (PVI-POEM) copolymer matrix. The low gas permeance of the neat GO-filler-based MMM was significantly improved by routing a CO 2 -permeable pathway through the semi-interconnected GO-ZIF nanocages. The good rubbery adhesion properties of PVI-POEM, together with the chemical similarity between PVI and the ZIF imidazole linker, induced excellent polymer/filler interface engineering in the GO-ZIF MMMs. Moreover, the GO-ZIF nanofillers were fully blanketed by the PVI-POEM copolymer, to prevent interfacial defects, while in turn an ultrathin, highly permeable GO-ZIF selective layer was formed. As a result, the GO-ZIF 5% composite MMM achieved a state of the art CO 2 permeance of 995.1 GPU, retaining excellent CO 2 /N 2 and CO 2 /CH 4 selectivities of 45.9 and 17.5, respectively. The CO 2 -philic pathway of GO-ZIF filler and good interaction bewteen the PVI-POEM and GO-ZIF generate a synergistic effect of CO 2 separation, in comparison with a neat PVI-POEM composite membrane (CO 2 permeance 626.4 GPU, CO 2 /N 2 selectivity 36.2).

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Boosting gas separation performance and suppressing the physical aging of polymers of intrinsic microporosity (PIM-1) by nanomaterial blending

Abstract: The development of PIM-1 mixed matrix membranes using organic, inorganic and hybrid fillers towards the ideal gas separation enhancement.

Cited by 99 publications

References 202 publications

Symbiosis-inspired de novo synthesis of ultrahigh MOF growth mixed matrix membranes for sustainable carbon capture

Symbiosis-inspired de novo synthesis of ultrahigh MOF growth mixed matrix membranes for sustainable carbon capture

Recent Progress on Polymers of Intrinsic Microporosity and Thermally Modified Analogue Materials for Membrane‐Based Fluid Separations

Ultrathin, Highly Permeable Graphene Oxide/Zeolitic Imidazole Framework Polymeric Mixed-Matrix Composite Membranes: Engineering the CO₂-Philic Pathway

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Boosting gas separation performance and suppressing the physical aging of polymers of intrinsic microporosity (PIM-1) by nanomaterial blending

Abstract: The development of PIM-1 mixed matrix membranes using organic, inorganic and hybrid fillers towards the ideal gas separation enhancement.

Cited by 99 publications

References 202 publications

Symbiosis-inspired de novo synthesis of ultrahigh MOF growth mixed matrix membranes for sustainable carbon capture

Symbiosis-inspired de novo synthesis of ultrahigh MOF growth mixed matrix membranes for sustainable carbon capture

Recent Progress on Polymers of Intrinsic Microporosity and Thermally Modified Analogue Materials for Membrane‐Based Fluid Separations

Ultrathin, Highly Permeable Graphene Oxide/Zeolitic Imidazole Framework Polymeric Mixed-Matrix Composite Membranes: Engineering the CO2-Philic Pathway

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Ultrathin, Highly Permeable Graphene Oxide/Zeolitic Imidazole Framework Polymeric Mixed-Matrix Composite Membranes: Engineering the CO₂-Philic Pathway