Polymers of intrinsic microporosity/metal–organic framework hybrid membranes with improved interfacial interaction for high-performance CO<sub>2</sub> separation

Wang, Zheng Gong; Ren, Huiting; Zhang, Shenxiang; Zhang, Feng; Jin, Jian

doi:10.1039/c7ta01773a

Cited by 140 publications

(84 citation statements)

References 71 publications

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“…Both MOF NPs and pMOF MSs exhibited type‐I adsorption behavior (Figure 3a,b), proving their microporous features. The BET surface area of the MOF NPs was calculated to be 725 m 2 g −1 , which agreed with that of the NH 2 ‐UiO‐66 particles reported in previous studies 57 . For the pMOF MSs, the measured BET surface area (799 m 2 g −1 ) was slight larger than that of the MOF NPs (Table S1).…”

Section: Resultssupporting

confidence: 88%

Mixed matrix membranes containing polymer‐embedded metal‐organic framework microspheres

2020

AIChE Journal

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The controlling filler aggregation and strengthening interfacial interaction are of great scientific significance for mixed matrix membranes (MMMs). In this study, the polymer-embedded metal-organic framework (pMOF) microspheres (MSs) are designed by one-pot synthesis and employed as microfillers for improving separation performance of MMMs. Through adding polymer during solvothermal crystallization, the polymer chains are embedded into the MOF materials, and the morphologies of the MOFs are transformed from nanopaticles to polycrystalline MSs. Since the embedding of the identical polymer promotes the compatibility of polymeric matrixes and fillers, as well as the micrometer-sized porous MSs offer additionally superior and permanent transport pathways, the resulted MMMs display simultaneously enhanced selectivity and permeability for carbon capture. The CO 2 /CH 4 selectivity and CO 2 permeability of the pMOF MMMs are achieved at 1.3 and 2.2 times as those of the pure polymeric membranes, and 1.5 and 1.2 times as those of the MOF MMMs, respectively.

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Section: Resultssupporting

confidence: 88%

Mixed matrix membranes containing polymer‐embedded metal‐organic framework microspheres

2020

AIChE Journal

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“… 23 This result is commonly noted in the MMM literature, where upper limits of MOF loading are cited based on where MMMs begin to fail physically. 18 , 24 , 57 , 58 Our modeling results for PS and PIM-1 predict poor interactions between the polymer and filler in these MMMs, with increased rigidity, decreased density, and appearance of microvoids at the MOF/polymer interface. This suggests that the polymer is unable to fully conform to the surface of the filler in these combinations.…”

Section: Resultsmentioning

confidence: 86%

Understanding the origins of metal–organic framework/polymer compatibility

et al. 2018

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“…The synthesis of MOF was carried out as previously reported [ 34 ]. H 2 bdc-NH 2 (376 mg) and ZrCl 4 (488 mg) were added into DMF (120 mL) and stirred.…”

Section: Methodsmentioning

confidence: 99%

Preparation of Amino-Functional UiO-66/PIMs Mixed Matrix Membranes with [bmim][Tf2N] as Regulator for Enhanced Gas Separation

Zhang

et al. 2021

Membranes

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Development of mixed matrix membranes (MMMs) with excellent permeance and selectivity applied for gas separation has been the focus of world attention. However, preparation of high-quality MMMs still remains a big challenge due to the lack of enough interfacial interaction. Herein, ionic liquid (IL)-modified UiO-66-NH2 filler was first incorporated into microporous organic polymer material (PIM-1) to prepare dense and defect-free mixed matrix membranes via a coating modification and priming technique. IL [bmim][Tf2N] not only improves the hydrophobicity of UiO-66-NH2 and facilitates better dispersion of UiO-66-NH2 nanoparticles into PIM-1 matrix, but also promotes the affinity between MOFs and polymer, sharply reducing interface non-selective defects of MMMs. By using this strategy, we can not only facilely synthesize high-quality MMMs ignoring non-selective interfacial voids, but also structurally regulate MOF nanoparticles in the polymer substrate and greatly improve interface compatibility and stability of MMMs. The method also gives suitable level of generality for fabrication of versatile defect-free MMMs based on different combination of MOFs and PIMs. The prepared UiO-66-NH2@IL/PIM-1 membrane exhibited outstanding gas separation behavior with large CO2 permeation of 8283.4 Barrer and high CO2/N2 selectivity of 22.5.

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Polymers of intrinsic microporosity/metal–organic framework hybrid membranes with improved interfacial interaction for high-performance CO₂ separation

Abstract: An interfacial design utilizing hydrogen bonds was proposed for fabricating non-defective PIMs/MOF hybrid membranes to enhance the gas separation performance.

Cited by 140 publications

References 71 publications

Mixed matrix membranes containing polymer‐embedded metal‐organic framework microspheres

Mixed matrix membranes containing polymer‐embedded metal‐organic framework microspheres

Understanding the origins of metal–organic framework/polymer compatibility

Preparation of Amino-Functional UiO-66/PIMs Mixed Matrix Membranes with [bmim][Tf2N] as Regulator for Enhanced Gas Separation

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Polymers of intrinsic microporosity/metal–organic framework hybrid membranes with improved interfacial interaction for high-performance CO2 separation

Abstract: An interfacial design utilizing hydrogen bonds was proposed for fabricating non-defective PIMs/MOF hybrid membranes to enhance the gas separation performance.

Cited by 140 publications

References 71 publications

Mixed matrix membranes containing polymer‐embedded metal‐organic framework microspheres

Mixed matrix membranes containing polymer‐embedded metal‐organic framework microspheres

Understanding the origins of metal–organic framework/polymer compatibility

Preparation of Amino-Functional UiO-66/PIMs Mixed Matrix Membranes with [bmim][Tf2N] as Regulator for Enhanced Gas Separation

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Polymers of intrinsic microporosity/metal–organic framework hybrid membranes with improved interfacial interaction for high-performance CO₂ separation