Metal organic framework based mixed matrix membranes: an overview on filler/polymer interfaces

Lin, Rijia; Villacorta, Byron; Ge, Lei; Zhu, Zhonghua

doi:10.1039/c7ta07294e

Cited by 424 publications

(282 citation statements)

References 170 publications

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“…To address the MOF/polymer interface issue, the selection of MOF fillers and polymer matrix pair is of great significance for MMM fabrication as it directly determines their morphology and separation performances . Generally, tight control of the nature of interactions between MOF and the polymer chains can enhance the interface adhesion between these two materials.…”

Section: Selection Of Pair Mof Filler—polymer Matrixmentioning

confidence: 99%

Engineering of the Filler/Polymer Interface in Metal–Organic Framework‐Based Mixed‐Matrix Membranes to Enhance Gas Separation

Švec

et al. 2019

Chemistry An Asian Journal

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Traditional films cannotf ully adapt to industrial applicationsa nd to intensified processes. Advanced mixedmatrix membranes comprising metal-organic frameworks (MOF) embedded in ap olymer matrix have been developed with the goal of breaking the trade-offe ffect of traditional polymer membranes and achieving separation performance beyond Robeson's upper limit. The key challenges in the fabrication of MOF-based mixed-matrix membranes are an enhancementi nc ompatibility between the inorganic filler and the polymer matrix, elimination of the irregular mor-phologyand non-selectiveinterfacial defects, and further improvement in the gas-separation performance. This review summarizes the recent advances in protocols and strategies in terms of designing interfacial interactions to enhancet he MOF/polymer interface compatibility. This review aims at providing some meaningful insights into preparing MOFbased mixed-matrix membranes targeting ideal interfacial morphology and leading to excellent gas-separation performance.

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Section: Selection Of Pair Mof Filler—polymer Matrixmentioning

confidence: 99%

Engineering of the Filler/Polymer Interface in Metal–Organic Framework‐Based Mixed‐Matrix Membranes to Enhance Gas Separation

Švec

et al. 2019

Chemistry An Asian Journal

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“…On the other hand, there are still several technical challenges related with the development of MOF-based MMMs such as pair-wise selection of MOF and polymer, stability and dispersion of MOF in the polymer matrix, existence of the interfacial defects in the MMM. A recent review article summarized these issues together with the possible strategies to improve the compatibility between the filler and polymer using different experimental approaches [80]. In this section, we will specifically focus on a recent advancement in the field of MOF-based MMMs, incorporation of ionic liquids (ILs) as interface agents into the MOF/polymer MMMs to improve filler/polymer interfacial defects and to enhance the gas separation performance of MMMs.…”

Section: Recent Advances In Metal Organic Framework (Mof)-based Mmms mentioning

confidence: 99%

“…It has been discussed that the MOF/polymer compatibility in the MMMs has been reported to be poor and only low MOF filler loadings were achieved before the membrane selectivity is negatively affected [92]. Zhu et al [80] reviewed the existing solutions and strategies utilized to improve MOF/polymer compatibility. The MOF/polymer interface dictates feasibility and stability of MOF/polymer MMMs, therefore fundamental understanding of this interface is critical.…”

Section: Understanding the Mof/polymer Compatibility: The Role Of Commentioning

confidence: 99%

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A Review on Computational Modeling Tools for MOF-Based Mixed Matrix Membranes

Keskın

Altınkaya

2019

Computation

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Computational modeling of membrane materials is a rapidly growing field to investigate the properties of membrane materials beyond the limits of experimental techniques and to complement the experimental membrane studies by providing insights at the atomic-level. In this study, we first reviewed the fundamental approaches employed to describe the gas permeability/selectivity trade-off of polymer membranes and then addressed the great promise of mixed matrix membranes (MMMs) to overcome this trade-off. We then reviewed the current approaches for predicting the gas permeation through MMMs and specifically focused on MMMs composed of metal organic frameworks (MOFs). Computational tools such as atomically-detailed molecular simulations that can predict the gas separation performances of MOF-based MMMs prior to experimental investigation have been reviewed and the new computational methods that can provide information about the compatibility between the MOF and the polymer of the MMM have been discussed. We finally addressed the opportunities and challenges of using computational studies to analyze the barriers that must be overcome to advance the application of MOF-based membranes.Computation 2019, 7, 36 2 of 26 these porous fillers, metal organic frameworks (MOFs) have received special attention due to their well-defined structures and tunable pore sizes.MOFs combine the properties of both inorganic and organic materials since they are assembled using metal ions with organic linkers [14]. The most important challenges involved in fabricating the MOF-based MMMs are to prevent the aggregation of the particles in the polymer and poor interaction between the particles and the polymer matrix. Rubbery polymers favor the formation of a defect-free interface between the particles and matrix due to their high degree of mobility. Flexible chains in the rubbery polymers make the membrane highly permeable, consequently, the gas transport is mainly dominated by the polymer matrix and the contribution of the MOF particles to the overall transport becomes very small. Glassy polymers have rigid chain structures, thus, they exhibit superior separation performance. On the other hand, the rigid structure weakens the interaction between polymers and particles. MOFs contain organic functionality in their bridging ligands, which can interact with the organic functionality in polymers. Numerous numbers of linkers and metal ions can be combined to fabricate MOFs, which can then be used as fillers in hundreds of different types of polymers; consequently, experimental screening of all MOF/polymer combinations is practically impossible. At this stage, computational tools play a key role in extensive screening of a large number of MOF/polymer combinations for particular gas separation. The MOF permeability obtained from the atomically detailed simulations is used as an input in permeation theories such as the Maxwell model to predict the gas permeabilities in MMMs. On the other hand, full atomistic simulations consider MOF and polymer simultan...

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“…23,24 The most important challenges in the formation of advanced mixed-matrix membranes are: (i) elimination of interfacial defects that arise from poor compatibility between the polymer matrix and the highly selective ultramicroporous filler and (ii) limitations in the maximum filler loading for MMMs with sufficiently high mechanical strength. 25 A recent study demonstrated that ZIF-8 nanoparticles coated with polydopamine (PD) enhanced their compatability with a Tröger's base derived polyimide matrix due to interactions by hydrogen bonding of the orthodihydroxyl groups in the PD and the nitrogen of the imidazole in ZIF-8. 26 The resulting MMMs demonstrated moderately improved gas separation properties but no propylene/propane permeation data were reported and the ZIF-8 content was limited to only 30 wt%.…”

Section: Introductionmentioning

confidence: 99%

Highly Compatible Hydroxyl-Functionalized Microporous Polyimide-ZIF-8 Mixed Matrix Membranes for Energy Efficient Propylene/Propane Separation

Ma¹,

Swaidan

Wang³

et al. 2018

ACS Appl. Nano Mater.

101

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Mixed-matrix membranes composed of mechanically strong, solution-processable polymers and highly selective ultramicroporous fillers (pore size < 7 Å) are superior candidate membrane materials for a variety of energy-intensive gas separation applications because of their structural tunability to achieve enhanced gas permeability and gas-pair selectivity. However, their industrial implementation has been severely hindered because inefficient compatibility of the polymer matrices and crystalline fillers results in poorly performing membranes with low filler capacity and interfacial defects. Herein, we report for the first time a unique strategy to fabricate highly propylene/propane selective mixed-matrix membranes (MMMs) composed of a hydroxyl-functionalized microporous polyimide (PIM-6FDA-OH) and an ultramicroporous, strongly size-sieving zeolitic imidazolate framework (ZIF-8). Excellent compatibility between PIM-6FDA-OH and ZIF-8 with selective filler loading up to 65 wt% resulted from N…O-H induced hydrogen bonding as evidenced by Fourier-transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The newly developed MMMs demonstrated unprecedented mixed-gas performance for C 3 H 6 /C 3 H 8 separation and outstanding plasticization resistance of up to at least 7 bar feed pressure. The reported fabrication concept is expected to be applicable to a wide variety of OH functionalized polymers and alternative tailor-made imidazolate framework materials designed for MMMs to achieve optimal gas separation performance.

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Metal organic framework based mixed matrix membranes: an overview on filler/polymer interfaces

Abstract: This review focuses on state-of-the-art solutions and strategies for MOF/polymer interface issues in mixed matrix membranes.

Cited by 424 publications

References 170 publications

Engineering of the Filler/Polymer Interface in Metal–Organic Framework‐Based Mixed‐Matrix Membranes to Enhance Gas Separation

Engineering of the Filler/Polymer Interface in Metal–Organic Framework‐Based Mixed‐Matrix Membranes to Enhance Gas Separation

A Review on Computational Modeling Tools for MOF-Based Mixed Matrix Membranes

Highly Compatible Hydroxyl-Functionalized Microporous Polyimide-ZIF-8 Mixed Matrix Membranes for Energy Efficient Propylene/Propane Separation

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