High-performance reverse osmosis membranes fabricated on highly porous microstructured supports

Lee, Jaewoo; Wang, Rong; Bae, Tae‐Hyun

doi:10.1016/j.desal.2018.01.037

Cited by 46 publications

(58 citation statements)

References 39 publications

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“…Considering the PA‐polysulfone ensemble, the morphology of the outer surface seems similar to that of the ultrafiltration supports described in the majority of publications relating to nanofiltration and reverse osmosis . The morphology of the inner surface, though, clearly reveals larger porosity (evidenced as hollow spaces below the continuous PA film) similar to the microfiltration supports recently used by Lee et al to make highly permeable TFC membranes.…”

Section: Resultssupporting

confidence: 59%

“…Water permeance in reverse osmosis (RO) and nanofiltration (NF) for different thin‐film composite (TFC) membranes compared with the membrane fabricated in this work, highlighted with the orange circle (a). See further information about these membranes in Table S1 . Comparison of m 2 /m 3 ratio and permeate flow per bar and per m 3 of equipment between TFC membranes with the PA thin film formed on the lumen side from other works and the results of the present work, highlighted in orange circles (b).…”

Section: Resultsmentioning

confidence: 72%

“…Lee et al and Lai et al have recently studied the optimization of TFC membranes for reverse osmosis applications. Both of them found ways to maximize the permeance of water without decreasing the rejection values.…”

Section: Resultsmentioning

confidence: 99%

“…Both of them found ways to maximize the permeance of water without decreasing the rejection values. In particular, Lee et al investigated the formation of highly porous microstructured substrates, obtaining mechanically stable narrow finger pores along the structure with about 40 nm of pore diameter. This result contrasts with the structure of the membrane fabricated in the present work, whose cross section had a rather symmetric pore‐size distribution along the diameter with inner pore diameters of about 2–3 μm.…”

Section: Resultsmentioning

confidence: 99%

“…Jimenez‐Solomon et al observed the influence of the hydrophilicity or hydrophobicity and the roughness on the final TFC membrane. Lee et al recently studied the formation of highly porous microstructured supports, where the proportion of polymer in the casting solution used in the phase inversion was reduced. This study was amplified to the influence of pore size and porosity on the formation of a highly permeable PA layer of a TFC membrane.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultssupporting

confidence: 59%

Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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MXene Materials for Designing Advanced Separation Membranes

et al. 2020

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MXenes are emerging rapidly as a new family of multifunctional nanomaterials with prospective applications rivaling that of graphenes. Herein, a timely account of the design and performance evaluation of MXene‐based membranes is provided. First, the preparation and physicochemical characteristics of MXenes are outlined, with a focus on exfoliation, dispersion stability, and processability, which are crucial factors for membrane fabrication. Then, different formats of MXene‐based membranes in the literature are introduced, comprising pristine or intercalated nanolaminates and polymer‐based nanocomposites. Next, the major membrane processes so far pursued by MXenes are evaluated, covering gas separation, wastewater treatment, desalination, and organic solvent purification. The potential utility of MXenes in phase inversion and interfacial polymerization, as well as layer‐by‐layer assembly for the preparation of nanocomposite membranes, is also critically discussed. Looking forward, exploiting the high electrical conductivity and catalytic activity of certain MXenes is put into perspective for niche applications that are not easily achievable by other nanomaterials. Furthermore, the benefits of simulation/modeling approaches for designing MXene‐based membranes are exemplified. Overall, critical insights are provided for materials science and membrane communities to navigate better while exploring the potential of MXenes for developing advanced separation membranes.

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Emergence of MXene and MXene–Polymer Hybrid Membranes as Future‐ Environmental Remediation Strategies

et al. 2022

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The continuous deterioration of the environment due to extensive industrialization and urbanization has raised the requirement to devise high-performance environmental remediation technologies. Membrane technologies, primarily based on conventional polymers, are the most commercialized air, water, solid, and radiation-based environmental remediation strategies. Low stability at high temperatures, swelling in organic contaminants, and poor selectivity are the fundamental issues associated with polymeric membranes restricting their scalable viability. Polymer-metal-carbides and nitrides (MXenes) hybrid membranes possess remarkable physicochemical attributes, including strong mechanical endurance, high mechanical flexibility, superior adsorptive behavior, and selective permeability, due to multi-interactions between polymers and MXene's surface functionalities. This review articulates the state-of-the-art MXene-polymer hybrid membranes, emphasizing its fabrication routes, enhanced physicochemical properties, and improved adsorptive behavior. It comprehensively summarizes the utilization of MXene-polymer hybrid membranes for environmental remediation applications, including water purification, desalination, ion-separation, gas separation and detection, containment adsorption, and electromagnetic and nuclear radiation shielding. Furthermore, the review highlights the associated bottlenecks of MXene-Polymer hybrid-membranes and its possible alternate solutions to meet industrial requirements. Discussed are opportunities and prospects related to MXene-polymer membrane to devise intelligent and next-generation environmental remediation strategies with the integration of modern age technologies of internet-of-things, artificial intelligence, machine-learning, 5G-communication and cloud-computing are elucidated.The ORCID identification number(s) for the author(s) of this article can be found under

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High-performance reverse osmosis membranes fabricated on highly porous microstructured supports

Cited by 46 publications

References 39 publications

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

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

MXene Materials for Designing Advanced Separation Membranes

Emergence of MXene and MXene–Polymer Hybrid Membranes as Future‐ Environmental Remediation Strategies

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