Fabrication and characterization of a surface-patterned thin film composite membrane

Maruf, Sajjad H.; Greenberg, Alan R.; Pellegrino, John; Ding, Yifu

doi:10.1016/j.memsci.2013.10.017

Cited by 101 publications

(62 citation statements)

References 55 publications

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“…Parameter Enhancing the hydrodynamic mixing on the feed side, for example by increasing the cross-flow velocity or improving spacer design, can suppress the detrimental effects of ECP [13,17] and lower the required membrane area. Recent studies have also suggested that creating micrometerscale channels on the membrane surface may reduce ECP by increasing surface turbulence [58].…”

Section: Membrane Area Requirement Can Be Most Effectively Reduced Bymentioning

confidence: 99%

Desalination by forward osmosis: Identifying performance limiting parameters through module-scale modeling

Deshmukh

Yip

Lin

et al. 2015

Journal of Membrane Science

117

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In this study, we analyze the effects of membrane properties, namely water permeability, solute permeability, and structural parameter, on the overall performance of an FO membrane module to extract water from simulated seawater (0.6 M NaCl). By considering the thermodynamic limit of operation, we demonstrate that the maximum achievable water recovery is practically independent of membrane properties, and higher maximum water recovery is achievable with counter-current compared to co-current mode. Analysis of the module-scale model indicates that reducing the support layer structural parameter offers substantial reductions in the membrane area required to achieve a specified water recovery. For example, a 25% reduction of the structural parameter of a state-of-the-art thin-film composite (TFC) membrane (from 400 to 300 ߤm) yields a sizable 20% reduction in membrane area. In contrast, quintupling the water permeability coefficient (from 2.0 to 10.0 L m −2 h −1 bar −1 ) of a modern TFC membrane generates only a modest 10% saving in membrane area. In addition, because of the permeabilityselectivity trade-off that governs current polymeric membranes, doubling the water permeability coefficient would cause crippling ~7-fold increases in forward and reverse solute permeation.This quantitative study models the potential performance of a module-scale FO desalination process and firmly highlights the need to prioritize the reduction of support layer mass transport resistances over water permeability increases in membrane development.

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Section: Membrane Area Requirement Can Be Most Effectively Reduced Bymentioning

confidence: 99%

Desalination by forward osmosis: Identifying performance limiting parameters through module-scale modeling

Deshmukh

Yip

Lin

et al. 2015

Journal of Membrane Science

117

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“…The transferred pattern was found to facilitate back mass transfer of retained species resulting in reduced fouling rates and higher critical fluxes. Furthermore, membrane patterning has been exploited for thin film composite (TFC) RO membranes, either by patterning of the UF support, or by direct patterning of a commercial TFC . Notably, in the case of the direct TFC patterning, the combination with a chemical surface modification yielded even more fouling resistance.…”

Section: Introductionmentioning

confidence: 99%

Roll‐to‐roll nanoimprint lithography of ultrafiltration membrane

Hutfles

Chapman

Pellegrino

2017

J of Applied Polymer Sci

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Nanoimprinting of a commercial, as supplied, polyethersulfone ultrafiltration membrane has been carried out for the first time using a roll‐to‐roll (R2R) process. To support this processing approach, we also developed a reusable flexible polyetherimide mold. We were able to pattern membrane at room temperature (∼21 °C) due to the high pressures (22 MPa) applied during the low contact times (<2 s) inherent to R2R imprinting. N2 permeance (L m−2 h−1 bar−1) testing was used as an indicator to verify retention of membrane porosity and to guide selection of imprinting parameters during initial screening studies. Further measurements showed the N2 and (scaled) deionized water permeances to have a 0.97 correlation coefficient. We scaled up the size of patterned membranes to as large as 226 cm2 area, thereby demonstrating the plausibility of continuously patterning commercial ultrafiltration membranes. We also investigated pattern stability versus aqueous heat treatment and found that time, temperature, and imparted strain (during patterning) may all influence stability, but no evidence of pattern loss was observed in electron micrographs after our filtration experiments. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45993.

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“…It is nearly impossible to plastically deform the membrane surface by employing high pressure without causing fracture in the barrier layer, which will result in membrane failure. To overcome this challenge, we recently demonstrated that surface patterning of TFC membranes can be successfully achieved by subsequently forming the barrier layer on a previously surface-patterned UF membrane support [12]. Specifically, the polyamide barrier layer is conveniently formed via an interfacial polymerization (IP) process that is the standard method for preparing TFC membranes [13,14].…”

Section: Introductionmentioning

confidence: 99%

Influence of substrate processing and interfacial polymerization conditions on the surface topography and permselective properties of surface-patterned thin-film composite membranes

Maruf

Greenberg

Ding

2016

Journal of Membrane Science

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The influence of substrate topography and interfacial polymerization (IP) conditions were investigated during the fabrication of patterned thin-film composite (TFC) membranes. Aromatic and semi-aromatic polyamide layers were formed atop patterned ultrafiltration (UF) membrane supports by IP using different concentrations of m-phenylenediamine (MPD) or piperazine (PIP) in water of 0.01-2 % w/v with a fixed concentration of trimesoyl chloride in hexane of 0.1 % w/v. For all conditions evaluated, TFC membranes with regular surface patterns were achieved by maintaining amine soaking time and IP reaction time within 120 s. Importantly, the surface topography of the patterned TFC membranes was determined to be independent of IP reaction time. Characterization of the morphological details suggests non-conformal growth of the barrier layer on the patterned UF substrates. Results indicate that the extent of such non-conformal growth can be reduced by decreasing the amine concentration as well as by choosing an amine monomer such as PIP that produces a thinner semi-aromatic barrier layer. The overall findings of this study provide a means for achieving desired surface features for specific membrane applications.

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Fabrication and characterization of a surface-patterned thin film composite membrane

Cited by 101 publications

References 55 publications

Desalination by forward osmosis: Identifying performance limiting parameters through module-scale modeling

Desalination by forward osmosis: Identifying performance limiting parameters through module-scale modeling

Roll‐to‐roll nanoimprint lithography of ultrafiltration membrane

Influence of substrate processing and interfacial polymerization conditions on the surface topography and permselective properties of surface-patterned thin-film composite membranes

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