Mixed matrix membranes based on UiO-66 MOFs in the polymer of intrinsic microporosity PIM-1

Khdhayyer, Muhanned; Esposito, Elisa; Fuoco, Alessio; Monteleone, Marcello; Giorno, Lidietta; Attfield, Martin P.; Budd, Peter M.

doi:10.1016/j.seppur.2016.09.036

Cited by 165 publications

(105 citation statements)

References 33 publications

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“…However, aging, denoted by a reduction of permeability with the time elapse due to the relaxation and reconstruction of polymeric chains caused by various mechanisms, is fatal to their practical gas separation applications . Many attempts have been proven effectively to solve the aging problem by fixing the chain movements within a certain degree, such as chemical crosslinking, physical blending with other functional fillers, and so forth. Nevertheless, these attempts normally require additional synthetic operation that makes it more complex and largely enhances the rigidness of PIMs, undermining their nature of excellent solution‐processability.…”

Section: Introductionmentioning

confidence: 99%

Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

Wang

et al. 2018

AIChE Journal

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Solution-processable microporous polymers are promising materials for CO 2 capture because of their low synthetic cost and high processability. In this work, we for the first time systematically evaluate the feasibility of two microporous polymers, namely PIM-1 and its hydrolyzed form hPIM-1, as adsorbent materials for postcombustion CO 2 capture. By conducting ternary CO 2 /N 2 /H 2 O breakthrough experiments, PIM-1 demonstrates several promising features: moderate CO 2 working capacity, low water vapor uptake capacity, good moisture resistance, and easy regeneration process. In addition, we have pioneeringly studied the multiple-cycle CO 2 adsorption-desorption induced relaxation effect on soft PIM-1 polymers. Through a simple dissolution-precipitation approach, PIM-1 can restore its BET surface area, CO 2 uptake capacity, and pore-size distribution. The solution reprocessability of PIM-1 demonstrated in this study distinguishes it from other rigid adsorbents and thus offers a new insight for the future design of economically-viable and facilely regenerable adsorbents.

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Section: Introductionmentioning

confidence: 99%

Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

Wang

et al. 2018

AIChE Journal

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“…In contrast, mixed matrix membranes (MMMs) can be easily scaled up and provide excellent separation performance and long-term operational stability as compared to polymer membranes [10]. An MMM is prepared by blending polymers with microporous material fillers, such as porous carbon, carbon nanotubes, zeolite, and MOFs [11][12][13][14][15][16]. Among the fillers for MMMs, MOFs have attracted significant attention based on their tunable pore structures and flexible frameworks, which have excellent compatibility with polymer matrices.…”

Section: Introductionmentioning

confidence: 99%

“…The synthesized MMMs exhibited higher gas permeability and selectivity when compared to a neat polyimide membrane and even showed molecular sieving characteristics at higher ZIF-8 loadings (>50% (w/w)). UiO-66 was also utilized as a filler and blended with polyimide, PIM-1, and polyether block amide for MMM fabrication [14,19,20]. High crystal dispersibility and CO 2 affinity were exhibited by the MMM containing amine-functionalized UiO-66.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mixed Matrix Membranes Containing ZIF-8 and UiO-66 for Multicomponent Light Gas Separation

Kim

et al. 2018

Crystals

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Mixed matrix membranes (MMMs) containing zeolitic imidazolite framework-8 (ZIF-8) and UiO-66 as microporous fillers were prepared and evaluated their potential for the separation of a gas mixture produced by a methane reforming process. Hydrothermal synthesis was performed to prepare both the ZIF-8 and UiO-66 crystals, with crystal sizes ranging from 50 to 70 nm for ZIF-8 and from 200 to 300 nm for UiO-66. MMMs were prepared with 15% filler loading for both MMM (ZIF-8) and MMM (UiO-66). MMM (UiO-66) exhibited H2 permeability of 64.4 barrer and H2/CH4 selectivity of 153.3 for single gas permeation, which are more than twice the values that were exhibited by a neat polymer membrane. MMM (ZIF-8) also showed better separation properties than that of a neat polymer membrane with H2 permeability of 27.1 barrer and H2/CH4 selectivity of 123.2. When a gas mixture consisting of 78% Ar/18% H2/4% CH4 flowed into the membranes at 5 bar, the H2 purity increased to as high as 93%. However, no improvement in the mixture gas separation performance was achieved by the MMMs as compared to that of a neat polymer membrane.

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“…Then the gas solubility coefficient is calculated in its approximate term as the ratio of the permeability over the diffusion coefficient. A more detailed discussion of the method can be found elsewhere [14]. …”

Section: Methodsmentioning

confidence: 99%

“…Besides these issues, the pores of MOF fillers can be blocked by polymer chains, when mixed together, which hinders the direct contact of gas molecules with the internal void space of the MOF particles [8,9]. In the last few years, various MMMs have been reported, based on PIM-1 and different inorganic [10], carbonaceous [11,12], organic [3] or MOF fillers [13,14,15] or a MOF/ionic liquid combination [16], with different effects on the gas permeability and selectivity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Transport Properties of Novel MOF/PIM-1/MOF Sandwich Membranes for Gas Separation

et al. 2017

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Metal-organic frameworks (MOFs) were supported on polymer membrane substrates for the fabrication of composite polymer membranes based on unmodified and modified polymer of intrinsic microporosity (PIM-1). Layers of two different MOFs, zeolitic imidazolate framework-8 (ZIF-8) and Copper benzene tricarboxylate ((HKUST-1), were grown onto neat PIM-1, amide surface-modified PIM-1 and hexamethylenediamine (HMDA) -modified PIM-1. The surface-grown crystalline MOFs were characterized by a combination of several techniques, including powder X-ray diffraction, infrared spectroscopy and scanning electron microscopy to investigate the film morphology on the neat and modified PIM-1 membranes. The pure gas permeabilities of He, H2, O2, N2, CH4, CO2 were studied to understand the effect of the surface modification on the basic transport properties and evaluate the potential use of these membranes for industrially relevant gas separations. The pure gas transport was discussed in terms of permeability and selectivity, highlighting the effect of the MOF growth on the diffusion coefficients of the gas in the new composite polymer membranes. The results confirm that the growth of MOFs on polymer membranes can enhance the selectivity of the appropriately functionalized PIM-1, without a dramatic decrease of the permeability.

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Mixed matrix membranes based on UiO-66 MOFs in the polymer of intrinsic microporosity PIM-1

Cited by 165 publications

References 33 publications

Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

Solution‐reprocessable microporous polymeric adsorbents for carbon dioxide capture

Preparation of Mixed Matrix Membranes Containing ZIF-8 and UiO-66 for Multicomponent Light Gas Separation

Synthesis and Transport Properties of Novel MOF/PIM-1/MOF Sandwich Membranes for Gas Separation

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