MOF nanoparticles of MIL-68(Al), MIL-101(Cr) and ZIF-11 for thin film nanocomposite organic solvent nanofiltration membranes

Echaide‐Górriz, Carlos; Sorribas, Sara; Téllez, Carlos; Coronas, Joaquı́n

doi:10.1039/c6ra17522h

Cited by 85 publications

(97 citation statements)

References 35 publications

(50 reference statements)

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“…[ 52 ] Furthermore, MPDTrip‐20 TFC showed enhanced permselectivity compared to MOF‐integrated TFC polyamides as well as previously fabricated high‐free‐volume thin‐film polyarylates (intended for organic nanofiltration applications) that currently remain the most successful efforts to introduce kinked building blocks in the interfacial polymerization membrane fabrication process. [ 27,68 ]…”

Section: Figurementioning

confidence: 99%

Finely Tuned Submicroporous Thin‐Film Molecular Sieve Membranes for Highly Efficient Fluid Separations

et al. 2020

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promising energy efficient separation processes in the chemical separation industry. Its continued growth can be attributed to lower energy requirements translating to lower capital and operating cost as well as significantly reduced environmental impact compared to conventional thermal separation processes. Additionally, membrane technology offers the advantages of continuous process operation, modular design, and small system footprint and is predicted to be a main contributor to global energy-and carbon-reduction initiatives in the coming decades. [2] In 2008, the global membrane market was valued at ≈12 billion USD with a compound annual growth rate (CAGR) of ≈10%. [3] Reverse osmosis (RO) and nanofiltration (NF) membranes contribute significantly to the total global membrane sales with the majority of products comprising of variations of thin-film composite (TFC) membranes made by interfacial polymerization. Such highly crosslinked aromatic submicroporous (i.e., pore size < 4 Å) [4] polyamide TFC membranes-pioneered by John Cadotte-revolutionized the desalination industry due to their unprecedented combination of high water flux and salt rejection. [5][6][7][8] Surprisingly, despite their immense commercial success for aqueous RO and NF applications, the IP membrane formation process has not been implemented in other large-scale fluid separation processes, especially organic solvent nanofiltration (OSN) and gas separations. [9][10][11] Polymers of intrinsic microporosity (PIMs) are an emerging group of solution processible amorphous microporous materials (pore size < 20 Å) gaining significant attention in membranebased separations due to their ability to transcend the conventional permeability/selectivity trade-off relationships. [12][13][14][15] Such materials exhibit exceptionally high free volumes as a result of inefficient chain packing by architectural designs using highly rigid and contorted spirobisindane-, triptycene-, ethanoanthracene-, and Tröger's base-building blocks. [13,[16][17][18][19][20][21] To date, technical challenges associated with fabricating defect-free, inexpensive, thin-film composite membranes as well as the inability to achieve low-molecular-weight cutoffs (MWCOs) have severely limited the industrial use of PIM-based and similar membrane materials. For example, Cook et al. demonstrated successful Polymeric membranes with increasingly high permselective performances are gaining a significant role in lowering the energy burden and improving the environmental sustainability of complex chemical separations. However, the commercial deployment of newly designed materials with promising intrinsic properties for fluid separations has been stalled by challenges associated with fabrication and scale up of low-cost, high-performance, defect-free thin-film composite (TFC) membranes. Here, a facile method to fabricate next-generation TFC membranes using a bridged-bicyclic triptycene tetra-acyl chloride (Trip) building block with a large fraction of finely tuned structural submicroporosity (por...

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Section: Figurementioning

confidence: 99%

Finely Tuned Submicroporous Thin‐Film Molecular Sieve Membranes for Highly Efficient Fluid Separations

et al. 2020

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“…The present study examines the effect of roughness in a hollow fiber where a thin PA film was synthesized separately on either the outer surface or the inner surface for nanofiltration applications (filtrating always from the PA side: in‐out in the inner TFC and out‐in in the outer TFC configuration). Generally, ultrafiltration substrates have been used to fabricate TFC membranes, but in the current work, a commercial microfiltration polysulfone support provided by the membrane manufacturer Polymem was used instead. Since the membrane was designed to separate from the outer surface, the manufacture states that the pore size there should be above 200 nm.…”

Section: Introductionmentioning

confidence: 99%

“…The separation application was focused on the removal of Acridine Orange (AO, 260 Da) from water. The experimental procedure was adapted for the inner and outer syntheses: when the PA was formed on the outer surface, the synthesis was carried out by the usual interfacial polymerization method, whereas when the PA was formed on the inner surface the interfacial polymerization was carried out by microfluidics. The influence of the support pore size and roughness, as well as the interfacial synthesis procedure, on the final TFC membrane is evaluated.…”

Section: Introductionmentioning

confidence: 99%

Nanofiltration thin‐film composite membrane on either the internal or the external surface of a polysulfone hollow fiber

et al. 2020

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The inner and outer surfaces of a porous hollow fiber polysulfone support are compared as substrates for the synthesis of polyamide thin-film composite (TFC) membranes by interfacial polymerization. While both surfaces have pores common of microfiltration membranes, the inner surface has a larger pore diameter than the outer surface (2,700 nm compared to 950 nm). The inner TFC membrane showed higher water nanofiltration permeance than the outer (2.20 ± 0.17 compared to 0.13 ± 0.03 L m −2 hr −1 bar −1 ). This was due to the influence of the porosity and roughness, which were different on both support surfaces. These membranes are interesting because they were synthesized in a hollow fiber support with a high membrane area per volume unit (~6,900 m 2 /m 3 ) and the substrate used was commercial, which means that the TFC membrane obtained is suitable for industrial application. A mathematical simulation of the nanofiltration run with COMSOL Multiphysics 5.3 software confirmed the experimental trends observed. K E Y W O R D S hollow fiber, interfacial polymerization, microfluidics, nanofiltration, thin-film composite

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“…Only a few examples incorporating MIL‐68(Al) as a selective material for separation applications are found in the literature. Echaide‐Górriz et al included MIL‐68(Al) nanoparticles in thin‐film nanocomposite membranes for organic solvent nanofiltration . Regarding the separation of gas mixtures, Seoane et al prepared mixed‐matrix membranes (MMMs) embedding nanosized MIL‐68(Al) crystals in polysulfone for H 2 /CH 4 and CO 2 /CH 4 separation, improving the selectivity from the pure polysulfone membrane .…”

Section: Introductionmentioning

confidence: 99%

“…Echaide-Górriz et al included MIL-68(Al) nanoparticles in thin-film nanocomposite membranes for organic solvent nanofiltration. [29] Regarding the separation of gas mixtures, Seoane et al prepared mixed-matrix membranes (MMMs) embedding nanosized MIL-68(Al) crystals in polysulfone for H 2 /CH 4 and CO 2 /CH 4 separation, improving the selectivity from the pure polysulfone membrane. [27] Dong et al also fabricated MMMs with MIL-68(Al) as the filler, but they selected Matrimid® as the polymeric matrix, obtaining a CO 2 / CH 4 selectivity of 79.0.…”

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Enhancement of Growth of MOF MIL‐68(Al) Thin Films on Porous Alumina Tubes Using Different Linking Agents

et al. 2017

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The preparation of MIL‐68(Al) films on the inner surface of alumina tubes is reported. As the direct deposition of the MOF on bare alumina gives poor adhesion results, three different linking agents are employed to achieve a good MOF–support interaction. Colloidal silica LUDOX®, zeolite silicalite‐1, and natural polysaccharide chitosan are chosen as binders, because they contain potential functional groups (hydroxy, amino, ether), which can establish hydrogen bonds. While colloidal silica leads to noncontinuous MOF layers, silicalite‐1 and chitosan give rise to uniform and well‐anchored films, as confirmed by the different characterization techniques used to study the MOF layer. Single‐gas permeation experiments are carried out to determine the quality and ideal efficiency of the membranes prepared with silicalite‐1 and chitosan. The results for the MIL‐68(Al)/silicalite‐1 membranes evidence the existence of macrodefects. However, no cracks are found when chitosan is used as a linking agent, and the gas flow through the MIL‐68(Al)/chitosan membranes clearly follows Knudsen diffusion.

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MOF nanoparticles of MIL-68(Al), MIL-101(Cr) and ZIF-11 for thin film nanocomposite organic solvent nanofiltration membranes

Abstract: MOF nanoparticles of MIL-68(Al), MIL-101(Cr) and ZIF-11 for thin film nanocomposite organic solvent nanofiltration.

Cited by 85 publications

References 35 publications

Finely Tuned Submicroporous Thin‐Film Molecular Sieve Membranes for Highly Efficient Fluid Separations

Finely Tuned Submicroporous Thin‐Film Molecular Sieve Membranes for Highly Efficient Fluid Separations

Nanofiltration thin‐film composite membrane on either the internal or the external surface of a polysulfone hollow fiber

Enhancement of Growth of MOF MIL‐68(Al) Thin Films on Porous Alumina Tubes Using Different Linking Agents

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