Hypercrosslinked Additives for Ageless Gas‐Separation Membranes

Lau, Cher Hon; Mulet, Xavier; Konstas, Kristina; Doherty, Cara M.; Sani, Marc‐Antoine; Separovic, Frances; Hill, Matthew R.; Wood, Colin D.

doi:10.1002/ange.201508070

Cited by 23 publications

(42 citation statements)

References 35 publications

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“…As alternatives, HCPs are synthesized from cheap starting materials under mild reaction conditions, which reinforce their large‐scale production. HCPs began their scientific journey as fillers in MMMs in 2016 when Lau et al incorporated a,a′‐dichloro‐p‐xylene (p‐DCX), a typical HCP synthesized at room temperature, into a super glassy matrix, poly(1‐trimethylsilyl‐1‐propyne) (PTMSP), to fabricate MMMs for gas separation . The partial penetration of bulky trimethylsilyl groups of PTMSP into pores of p‐DCX effectively retards the aging process in MMMs.…”

Section: Choices Of Advanced Porous Materialsmentioning

confidence: 99%

Advanced Porous Materials in Mixed Matrix Membranes

et al. 2018

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Membrane technology has gained great interest in industrial separation processing over the past few decades owing to its high energy efficiency, small capital investment, environmentally benign characteristics, and the continuous operation process. Among various types of membranes, mixed matrix membranes (MMMs) combining the merits of the polymer matrix and inorganic/organic fillers have been extensively investigated. With the rapid development of chemistry and materials science, recent studies have shifted toward the design and application of advanced porous materials as promising fillers to boost the separation performance of MMMs. Here, first a comprehensive overview is provided on the choices of advanced porous materials recently adopted in MMMs, including metal-organic frameworks, porous organic frameworks, and porous molecular compounds. Novel trends in MMMs induced by these advanced porous fillers are discussed in detail, followed by a summary of applying these MMMs for gas and liquid separations. Finally, a concise conclusion and current challenges toward the industrial implementation of MMMs are outlined, hoping to provide guidance for the design of high-performance membranes to meet the urgent needs of clean energy and environmental sustainability.

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Section: Choices Of Advanced Porous Materialsmentioning

confidence: 99%

Advanced Porous Materials in Mixed Matrix Membranes

et al. 2018

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“…Thereafter, the group of Wood et al. applied HCP as filler in a poly(1‐trimethylsilyl‐1‐propyne) (PTMSP) matrix . Thereby, they improved the transport performance and the selectivity for the separation of CO 2 /N 2 gas mixtures.…”

Section: Introductionmentioning

confidence: 99%

Solvent‐Responsive and Switchable Nanofiltration Membranes based on Hypercrosslinked Polymers with Permanent Porosity

2018

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Porous organic framework materials such as hypercrosslinked polymers (HCP) show a high chemical stability and dynamic behavior in a variety of solvents while their pore properties exhibit great potential for mixed matrix membrane (MMM) applications. However, their influence as porous filler in MMMs, especially for applications in liquid‐phase filtration is still unexploited. Herein, we demonstrate an HCP‐based MMM for molecular separation in the liquid phase by nanofiltration (NF). Depending on the solvent, the membrane changes its fractional free volume by shrinking or swelling. In connection to that, the pore size is also influenced, hence, providing a tunable permeance and molecular cut‐off. The reduction of the pore volume and size directly correlates to the improvement of the NF performance, while the volume increase completely diminishes it. The extraordinary flexibility and high degree of crosslinking assure permanent porosity and render the dynamic behavior fully reversible. Thereby, a solvent‐responsive “on” and “off” switching of the NF properties is enabled and was experimentally proven. Overall, this provides alternative strategies regarding the fouling and regeneration of membranes as well as the inhibition of pore blocking in membrane‐derived processes by a tunable separation performance.

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“…[11] Through batch gas-permeation experiments,w ep reviously established that physical aging in PTMSP can be overcome with porouso rganic polymericf illers, such as the archetypal porous aromatic framework PAF-1 [12] and hypercrosslinked polymers (HCPs). [13] PAF-1 is made up of aromaticrings linked together in atetrahedron, [14] whereas ap olydichloroxylene (p-DCX) hypercrosslinked polymer comprises xylene units linked together through methylene bridging ( Figure 1). [15] Both polymers have aromatic rings that may facilitate intimaten onbonding interactions with PTMSP chains.…”

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confidence: 99%

“…[15] Both polymers have aromatic rings that may facilitate intimaten onbonding interactions with PTMSP chains. [12,13,16] Akin to other nanofillers, the blendingo ft hese porous, organic polymers only enhanced PTMSP flux,l eaving the selectivity of molecules intact. [12,13,16] Akin to other nanofillers, the blendingo ft hese porous, organic polymers only enhanced PTMSP flux,l eaving the selectivity of molecules intact.…”

mentioning

confidence: 99%

“…Such interactions immobilize PTMSP chains and prevent the collapse of FFV content that abates physicala ging in super glassy polymers. [12,13,16] Akin to other nanofillers, the blendingo ft hese porous, organic polymers only enhanced PTMSP flux,l eaving the selectivity of molecules intact. Even the presence of functionalg roups with high affinity towards targeted molecular species on nanofillers did not enhancem olecular selectivity.…”

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Organic Microporous Nanofillers with Unique Alcohol Affinity for Superior Ethanol Recovery toward Sustainable Biofuels

et al. 2017

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To minimize energy consumption and carbon footprints, pervaporation membranes are fast becoming the preferred technology for alcohol recovery. However, this approach is confined to small-scale operations, as the flux of standard rubbery polymer membranes remain insufficient to process large solvent volumes, whereas membrane separations that use glassy polymer membranes are prone to physical aging. This study concerns how the alcohol affinity and intrinsic porosity of networked, organic, microporous polymers can simultaneously reduce physical aging and drastically enhance both flux and selectivity of a super glassy polymer, poly-[1-(trimethylsilyl)propyne] (PTMSP). Slight loss in alcohol transportation channels in PTMSP is compensated by the alcohol affinity of the microporous polymers. Even after continuous exposure to aqueous solutions of alcohols, PTMSP pervaporation membranes loaded with the microporous polymers outperform the state-of-the-art and commercial pervaporation membranes.

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Hypercrosslinked Additives for Ageless Gas‐Separation Membranes

Abstract: This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record.

Cited by 23 publications

References 35 publications

Advanced Porous Materials in Mixed Matrix Membranes

Advanced Porous Materials in Mixed Matrix Membranes

Solvent‐Responsive and Switchable Nanofiltration Membranes based on Hypercrosslinked Polymers with Permanent Porosity

Organic Microporous Nanofillers with Unique Alcohol Affinity for Superior Ethanol Recovery toward Sustainable Biofuels

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