High flux hydrophobic membranes for organic solvent nanofiltration (OSN)—Interfacial polymerization, surface modification and solvent activation

Jimenez‐Solomon, Maria F.; Bhole, Yogesh; Livingston, Andrew G.

doi:10.1016/j.memsci.2013.01.055

Cited by 200 publications

(63 citation statements)

References 19 publications

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“…A commonly applied post‐treatment of TFC membranes, a 24 h immersion in DMF, caused the EtOH permeance of the IL system to increase from 0.61±0.07 to 0.84±0.04 L m −2 h −1 bar −1 (factor 1.31), together with a decrease in RB passage (i.e., 100 % retention) of 55 %. However, the use of DMF would make this membrane preparation system significantly less sustainable.…”

Section: Resultsmentioning

confidence: 99%

Sustainable Process for the Preparation of High‐Performance Thin‐Film Composite Membranes using Ionic Liquids as the Reaction Medium

et al. 2016

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A new form of interfacial polymerization to synthesize thin-film composite membranes realizes a more sustainable membrane preparation and improved nanofiltration performance. By introducing an ionic liquid (IL) as the organic reaction phase, the extremely different physicochemical properties to those of commonly used organic solvents influenced the top-layer formation in several beneficial ways. In addition to the elimination of hazardous solvents in the preparation, the m-phenylenediamine (MPD) concentration could be reduced 20-fold, and the use of surfactants and catalysts became redundant. Together with the more complete recycling of the organic phase in the water/IL system, these factors resulted in a 50 % decrease in the mass intensity of the top-layer formation. Moreover, a much thinner top layer with a high ethanol permeance of 0.61 L m(-2) h(-1) bar(-1) [99 % Rose Bengal (RB, 1017 Da) retention; 1 bar=0.1 MPa] was formed without the use of any additives. This EtOH permeance is 555 and 161 % higher than that for the conventional interfacial polymerization (without and with additives, respectively). In reverse osmosis, high NaCl retentions of 97 % could be obtained. Finally, the remarkable decrease in the membrane surface roughness indicates the potential for reduced fouling with this new type of membrane.

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Section: Resultsmentioning

confidence: 99%

Sustainable Process for the Preparation of High‐Performance Thin‐Film Composite Membranes using Ionic Liquids as the Reaction Medium

et al. 2016

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“…Comparably, previous attempts to analyze the feasbility of microporous materials for aqueous separations demonstrated improved permeance but coupled with significant losses in solute rejection and MWCO as shown for Tröger's base PIMs (TB‐OH and TB‐OH CS) and covalent organic framework (COF)‐based membranes (M‐TpBD) in Figure 3b. [ 50,51 ] The ability to couple high permeance with high rejection truly differentiates the MPDTrip TFCs in this study to previous approaches which resulted in permeance gains with significant rejection losses for liquid separations [ 27,50–59 ] and fills a consistently reiterated need in the chemical industry. [ 48,49,66,67 ]…”

Section: Figurementioning

confidence: 93%

“…c) Permeance of methanol versus selectivity for small solutes (210–320 g mol −1 ) for state‐of‐the‐art TFCs. Comparative data were obtained from the literature [ 27,52–59 ] with details shown in Table S12 in the Supporting Information. d) Sodium chloride rejection comparison of the MPDTrip‐20 TFC membrane fabricated in this study with state‐of‐the‐art desalination membranes.…”

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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“…Studies performed by Teixeira et al [6], with hydrophobic commercial membrane Puramen s , demonstrated permeability of 0.23, 0.16, 0.0015 L h À 1 m À 2 bar À 1 for n-hexane, ethanol and oleic acid, respectively. Jimenez Solomon et al [7] studied the permeate flux of nanofiltration Starmen TM and Puramem s of a feed solution comprising polystyrene oligomers dissolved in toluene, in operation conditions of 30 bar and 30 o C, and found fluxes between 18 and 114 L h À 1 m À 2 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of reverse osmosis and nanofiltration membranes performance in the permeation of organic solvents

Rezzadori

Penha

Proner

et al. 2015

Journal of Membrane Science

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High flux hydrophobic membranes for organic solvent nanofiltration (OSN)—Interfacial polymerization, surface modification and solvent activation

Cited by 200 publications

References 19 publications

Sustainable Process for the Preparation of High‐Performance Thin‐Film Composite Membranes using Ionic Liquids as the Reaction Medium

Sustainable Process for the Preparation of High‐Performance Thin‐Film Composite Membranes using Ionic Liquids as the Reaction Medium

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

Evaluation of reverse osmosis and nanofiltration membranes performance in the permeation of organic solvents

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