Blending <scp>PPO</scp>‐based molecules with <scp>P</scp>ebax <scp>MH</scp> 1657 in membranes for gas separation

Didden, Jeroen; Thür, Raymond; Volodin, A.; Vankelecom, Ivo F.J.

doi:10.1002/app.46433

Cited by 30 publications

(11 citation statements)

References 46 publications

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“…The oxygen pure gas permeability of Fluoroflex and PDMS films was measured using a custom‐made high‐throughput gas separation (HTGS) setup, as previously described. [ 96–98 ] The active membrane permeation area was 1.91 cm 2 per coupon. A constant‐volume‐varying‐pressure method was applied to determine the oxygen permeability.…”

Section: Experimental Methodsmentioning

confidence: 99%

Self‐sealing thermoplastic fluoroelastomer enables rapid fabrication of modular microreactors

et al. 2021

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A novel fluorinated soft thermoplastic elastomer (sTPE) for microfluidics is presented. It allows the rapid fabrication of microfluidic devices through a 30‐second hot embossing cycle at 220°C followed by self‐sealing through simple conformal contact at room temperature, or with baking. The material shows high chemical resistance, particularly in comparison to polydimethylsiloxane (PDMS), to many common organic solvents and can be rapidly micropatterned with high fidelity using a variety of microfluidic master molds thanks to its low mechanical stiffness. Self‐sealing of the material is reversible and withstands pressures of up to 2.8 bar with room temperature sealing and four bar with baking at 185°C for 2 hours. The elastomeric, transparent sTPE exhibits material characteristics that make it suited for use as a microreactor, such as low absorption, surface roughness and oxygen permeability, while also allowing a facile and scalable fabrication process. Modular microfluidic devices, leveraging the fast and reversible room temperature self‐sealing, are demonstrated for the generation of water droplets in a toluene continuous phase using T‐junctions of variable size. The sTPE offers an alternative to common microfluidic materials, overcoming some of their key drawbacks, and giving scope for low‐cost and high‐throughput devices for flow chemistry applications.

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Section: Experimental Methodsmentioning

confidence: 99%

Self‐sealing thermoplastic fluoroelastomer enables rapid fabrication of modular microreactors

et al. 2021

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“…The CO 2 /N 2 mixed gas permeability and separation factor of Matrimid and the MMMs were measured in a high-throughput gas separation system (HTGS). [58,59] This system allows the measurement of 16 different membranes, while pressure, feed ratio, and temperature can be varied throughout the measurement. In this work, feed pressures of 5 and 15 were applied.…”

Section: Methodsmentioning

confidence: 99%

Investigation of ZIF‐78 Morphology and Feed Composition on the Mixed Gas CO₂/N₂ Separation Performance in Mixed Matrix Membranes

Essen

Akker

Thür

et al. 2020

Adv Materials Inter

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organic linkers. The obtained ordered organic-inorganic networks exhibit high surface areas and their pore size, aperture and functionality is highly tunable, due to the variability in available organic linkers. [1] For example, a series of iron(III) carboxylate MOFs shows varying framework flexibility, pore size, pore aperture, and 3D structure by varying the carboxylate linker type. [2-6] These properties make MOFs very attractive materials in the field of gas storage and separation, since gas sorption and diffusion are tunable by linker variation. [7,8] Despite these promising characteristics, MOFs often lack chemical and thermal stability, which limits their practical application. Nonetheless, the number of stable MOFs has been increasing over the years. [9] One subclass of thermally and chemically stable MOFs are zeolitic imidazolate frameworks (ZIFs), which consist out of zinc or cobalt cations and a variety of imidazolate linkers. Since the first reported ZIFs, many new ZIF structures and topologies have been unraveled. [10] Due to their versatility, stability, and microporous nature (i.e., high gas uptake), multiple ZIF containing membrane structures have been investigated for gas separation purposes. [11,12] By the use of high-throughput synthesis, ZIF structures analogous to the zeolite gmelinite (GME) topology were found, which exhibited extraordinary high CO 2 uptake. [13] These hexagonal anisotropic GME ZIF crystals have two 1D channel types (one pore exists out of KNO cages, with pore apertures ranging from 4.5 to 8 Å, the other out of alternating GME and HPR cages, with pore apertures ranging from 3.6 to 4.3 Å) that are oriented parallel along the c-axis of the crystal structure (Figure 1). [14,15] GME ZIFs are constructed by linking Zn 2+ with 2-nitroimidazolate (nIm) and another imidazolate linker, where the other imidazolate linker determines the pore size, aperture, and polarity. [13,14] Controlling size and shape of the mixed linker ZIFs is rather difficult, since the difference in pK a values between the variable imidazoles and 2-nitroimidazole (nIm) causes different degrees of deprotonation in the reaction mixture. [16] Nonetheless, for ZIF-69 and 78 (both with GME topology) it was shown that their size and aspect ratio could be controlled by using specific zinc salts and deprotonating agents and adapting the ratio between zinc and the imidazoles. [17-19] In this work, the influence of the zeolitic imidazolate framework 78 (ZIF-78) morphology, with 1D pores, on the mixed matrix membrane (MMM) CO 2 /N 2 mixed gas separation performance is investigated as well as the influence of the feed composition and pressure. Low aspect ratio and a high aspect ratio ZIF-78 particles are synthesized and incorporated in Matrimid with 10 and 20 wt% additive content. High pressure CO 2 and N 2 sorption measurements show that both the low and high aspect ratio ZIF-78 metal-organic frameworks (MOFs) exhibit similar sorption behavior. The incorporation of ZIF-78 into Matrimid results in improved CO 2 permeabilit...

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“…Our in-house developed high-throughput gas separation set-up (HTGS) was used to examine the gas permeation behavior of the synthesized membranes. A detailed set-up description is given elsewhere [44][45][46] . HTGS allows simultaneous pure gas and mixed-gas testing of 16 membrane coupons at varying membrane temperatures and feed pressures.…”

Section: Gas Permeationmentioning

confidence: 99%

Correlating MOF-808 parameters with mixed-matrix membrane (MMM) CO₂ permeation for a more rational MMM development

et al. 2021

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Blending PPO‐based molecules with Pebax MH 1657 in membranes for gas separation

Cited by 30 publications

References 46 publications

Self‐sealing thermoplastic fluoroelastomer enables rapid fabrication of modular microreactors

Self‐sealing thermoplastic fluoroelastomer enables rapid fabrication of modular microreactors

Investigation of ZIF‐78 Morphology and Feed Composition on the Mixed Gas CO₂/N₂ Separation Performance in Mixed Matrix Membranes

Correlating MOF-808 parameters with mixed-matrix membrane (MMM) CO₂ permeation for a more rational MMM development

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Blending PPO‐based molecules with Pebax MH 1657 in membranes for gas separation

Cited by 30 publications

References 46 publications

Self‐sealing thermoplastic fluoroelastomer enables rapid fabrication of modular microreactors

Self‐sealing thermoplastic fluoroelastomer enables rapid fabrication of modular microreactors

Investigation of ZIF‐78 Morphology and Feed Composition on the Mixed Gas CO2/N2 Separation Performance in Mixed Matrix Membranes

Correlating MOF-808 parameters with mixed-matrix membrane (MMM) CO2 permeation for a more rational MMM development

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Investigation of ZIF‐78 Morphology and Feed Composition on the Mixed Gas CO₂/N₂ Separation Performance in Mixed Matrix Membranes

Correlating MOF-808 parameters with mixed-matrix membrane (MMM) CO₂ permeation for a more rational MMM development