Nanofiltration Membranes with Crumpled Polyamide Films: A Critical Review on Mechanisms, Performances, and Environmental Applications

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(18), P. 12811 - 12827

Published: Sept. 1, 2022

Nanofiltration (NF) membranes have been widely applied in many important environmental applications, including water softening, surface/groundwater purification, wastewater treatment, and reuse. In recent years, a new class of piperazine (PIP)-based NF featuring crumpled polyamide layer has received considerable attention because their great potential for achieving dramatic improvements membrane separation performance. Since the report novel Turing structures that exhibited an order magnitude enhancement permeance ( Science 2018, 360 (6388), 518−521), number published research papers on this emerging topic grown exponentially to approximately 200. critical review, we provide systematic framework classify morphologies. The fundamental mechanisms fabrication methods involved formation these morphologies are summarized. We then discuss transport solutes how phenomena could simultaneously improve permeance, selectivity, antifouling applications highlighted, future opportunities/needs identified. insights review guidance further development high-performance tailored wide range applications.

Language: Английский

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Ultrathin Membranes for Separations: A New Era Driven by Advanced Nanotechnology

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(21)

Published: March 3, 2022

Ultrathin membranes are at the forefront of membrane research, offering great opportunities in revolutionizing separations with ultrafast transport. Driven by advanced nanomaterials and manufacturing technology, tremendous progresses made over last 15 years fabrications applications sub-50 nm membranes. Here, an overview state-of-the-art ultrathin is first introduced, followed a summary fabrication techniques emphasis on how to realize such extremely low thickness. Then, different types membranes, categorized based their structures, that is, network, laminar, or framework discussed focus interplays among structure, methods, separation performances. Recent research development trends highlighted. Meanwhile, performances current for representative (gas liquid separation) thoroughly analyzed compared. Last, challenges material design, structure construction, coordination given, order fully potential facilitate translation from scientific achievements industrial productions.

Language: Английский

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Tweak in Puzzle: Tailoring Membrane Chemistry and Structure toward Targeted Removal of Organic Micropollutants for Water Reuse

Environmental Science & Technology Letters, Journal Year: 2022, Volume and Issue: 9(4), P. 247 - 257

Published: March 25, 2022

Membrane-based water reuse through reverse osmosis (RO) and nanofiltration (NF) faces a critical challenge from organic micropollutants (OMPs). Conventional polyamide RO NF membranes often lack adequate selectivity to achieve sufficient removal of toxic harmful OMPs in water. Tailoring membrane chemistry structure allow highly selective has risen as an important topic membrane-based reuse. However, literature gap remains be addressed: how design for more OMPs. In this review, we critically analyzed the roles on highlighted opportunities strategies toward context Specifically, statistically rejection by conventional illustrate their drawbacks removal, followed discussion underlying fundamental mechanisms. Corresponding tailor properties improving against OMPs, including surface modification, nanoarchitecture construction, deployment alternative materials, were systematically assessed terms permeance, rejection, water–OMPs selectivity. end, discussed potential challenges various scale-up real applications.

Language: Английский

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Fabrication of novel thin-film nanocomposite polyamide membrane by the interlayer approach: A review

Desalination, Journal Year: 2023, Volume and Issue: 554, P. 116509 - 116509

Published: March 3, 2023

Language: Английский

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Empowering ultrathin polyamide membranes at the water–energy nexus: strategies, limitations, and future perspectives

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(9), P. 4374 - 4399

Published: Jan. 1, 2024

This review details the design and creation of ultrathin polyamide membranes with significant enhancement in water permeance along limitations potential strategies to empower their efficacy ionic molecular separations.

Language: Английский

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Acetone extraction induced piperazine diffusion reaction for regulating thin film composite nanofiltration membrane

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: 694, P. 122426 - 122426

Published: Jan. 8, 2024

Language: Английский

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A critical review on thin-film nanocomposite membranes enabled by nanomaterials incorporated in different positions and with diverse dimensions: Performance comparison and mechanisms

Journal of Membrane Science, Journal Year: 2022, Volume and Issue: 661, P. 120952 - 120952

Published: Aug. 28, 2022

Language: Английский

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A nanofiltration membrane with outstanding antifouling ability: Exploring the structure-property-performance relationship

Journal of Membrane Science, Journal Year: 2022, Volume and Issue: 668, P. 121205 - 121205

Published: Nov. 24, 2022

Language: Английский

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Modeling Water Transport in Interlayered Thin-Film Nanocomposite Membranes: Gutter Effect vs Funnel Effect

ACS ES&T Engineering, Journal Year: 2022, Volume and Issue: 2(11), P. 2023 - 2033

Published: Aug. 26, 2022

Interlayered thin-film nanocomposite (TFNi) membranes have experimentally demonstrated a great potential for achieving major gains in water permeance over conventional composite membranes, making them promising candidates many environmental applications. Nevertheless, existing literature often reports contradicting observations on the effectiveness of interlayers. In this study, we implement three-dimensional solution-diffusion model to analyze geometry-induced funnel effect and an interlayer-promoted gutter effect. Our simulation results suggest that even ultrathin interlayer few nanometers thickness could serve as low-resistance layer, which minimizes transversal transport less permeable polyamide layer thereby mitigate unfavorable The actual available is bounded by ideal polyamide-limited upper bound substrate-limited lower bound, with regulating competition between Water can be potentially improved order magnitude interlayer, enhancement more pronounced thinner layers, porous substrates, We further role improving flux distribution/uniformity membrane surface, has implications fouling propensity. study establishes theoretical framework understanding fundamental mechanisms TFNi provides important guidance future development high-performance desalination membranes.

Language: Английский

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Cosolvent-Assisted Interfacial Polymerization toward Regulating the Morphology and Performance of Polyamide Reverse Osmosis Membranes: Increased m-Phenylenediamine Solubility or Enhanced Interfacial Vaporization?

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(14), P. 10308 - 10316

Published: June 29, 2022

Cosolvent-assisted interfacial polymerization (IP) can effectively enhance the separation performance of thin film composite (TFC) reverse osmosis (RO) membranes. However, underlying mechanisms regulating formation their polyamide (PA) rejection films remain controversial. The current study reveals two essential roles cosolvents in IP reaction: (1) directly promoting vaporization with lower boiling points and (2) increasing solubility m-phenylenediamine (MPD) organic phase, thereby indirectly reaction. Using a series systematically chosen (i.e., diethyl ether, acetone, methanol, toluene) different MPD solubilities, we show that surface morphologies TFC RO membranes were regulated by combined direct indirect effects. A cosolvent favoring (e.g., point, greater solubility, and/or higher concentration) tends to create apparent thickness layer, larger nanovoids within more extensive exterior PA layers, leading significantly improved membrane water permeance. We further demonstrate potential achieve better antifouling for cosolvent-assisted provides mechanistic insights into critical reactions, providing new tools tailoring morphology properties toward efficient desalination reuse.

Language: Английский

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