Highly selective multilayer polymer thin films for CO<sub>2</sub>/N<sub>2</sub> separation

Song, Yixuan; Lugo, Elva L.; Powell, S. H.; Tzeng, Ping; Wilhite, Benjamin A.; Grunlan, Jaime C.

doi:10.1002/polb.24421

Cited by 15 publications

(9 citation statements)

References 63 publications

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“…Ionisation is achieved by simply dissolving the polymers with amine groups (i.e., chitosan, poly(etherimide), etc.) in water and adjusting the solution pH below 3.0 through acidification with hydrochloric acid (Figure 5a) [62,63]. Same procedure is used to prepare PE from polymer precursors containing carboxylic groups by basification with sodium hydroxide [64].…”

Section: Ionisationmentioning

confidence: 99%

“…The large number of system parameters affecting the physico-chemical properties of the deposited PE film result in both advantages and disadvantages for their application in membrane-based CO 2 capture [98]. Ultimately, the tailor-made PE synthesis combined with versatile application of LB films encouraged the preparation of multiple PE membranes for CO 2 separation from flue gas streams [63,[99][100][101][102].…”

Section: Langmuir-blodgett Filmsmentioning

confidence: 99%

“…PDMAEMA/PSF [70] PDMAEMA/PSF [100] PDADMAC/PSS/GO [90] PAH,Chitosan,PEI,P4VP,PDADMA [47] PDADMAC/PSS [83] PMMA [59] PVBC/PSS [58] PIM-1-PE/PDADMAC [63] PDADMAC/PSS [49] PDADMAC/PSS/βCD [103] PEO2/PMAA2 [48] PAH/(DCDS,PSS,DPPS) […”

Section: Compositesmentioning

confidence: 99%

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Top-Down Polyelectrolytes for Membrane-Based Post-Combustion CO2 Capture

Nikolaeva

Luis

2020

Molecules

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Polymer-based CO2 selective membranes offer an energy efficient method to separate CO2 from flue gas. ‘Top-down’ polyelectrolytes represent a particularly interesting class of polymer materials based on their vast synthetic flexibility, tuneable interaction with gas molecules, ease of processability into thin films, and commercial availability of precursors. Recent developments in their synthesis and processing are reviewed herein. The four main groups of post-synthetically modified polyelectrolytes discern ionised neutral polymers, cation and anion functionalised polymers, and methacrylate-derived polyelectrolytes. These polyelectrolytes differentiate according to the origin and chemical structure of the precursor polymer. Polyelectrolytes are mostly processed into thin-film composite (TFC) membranes using physical and chemical layer deposition techniques such as solvent-casting, Langmuir-Blodgett, Layer-by-Layer, and chemical grafting. While solvent-casting allows manufacturing commercially competitive TFC membranes, other methods should still mature to become cost-efficient for large-scale application. Many post-synthetically modified polyelectrolytes exhibit outstanding selectivity for CO2 and some overcome the Robeson plot for CO2/N2 separation. However, their CO2 permeance remain low with only grafted and solvent-casted films being able to approach the industrially relevant performance parameters. The development of polyelectrolyte-based membranes for CO2 separation should direct further efforts at promoting the CO2 transport rates while maintaining high selectivities with additional emphasis on environmentally sourced precursor polymers.

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Section: Ionisationmentioning

confidence: 99%

Section: Langmuir-blodgett Filmsmentioning

confidence: 99%

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Top-Down Polyelectrolytes for Membrane-Based Post-Combustion CO2 Capture

Nikolaeva

Luis

2020

Molecules

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“…Layer‐by‐layer (LbL) assembly is a nanocoating technique that has been used to construct functional thin films for gas barrier and gas separation coatings, energy storage and conversion, drug delivery, and adhesives . By alternately depositing oppositely charged polyelectrolytes and/or clay platelets onto a charged substrate, thin films are assembled with high clay concentration and alignment .…”

Section: Introductionmentioning

confidence: 99%

Super Gas Barrier and Fire Resistance of Nanoplatelet/Nanofibril Multilayer Thin Films

Qin¹,

Pour

Lazar³

et al. 2018

Adv Materials Inter

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of their colloidal stability, mechanical strength, high specific surface area, and thermal stability, [2][3][4][5][6] which have been used to produce transparent paper, biodegradable packaging, complex aerogels, and as the reinforcing phase in composites. [2,4,7,8] Despite all of its beneficial properties, cellulose exhibits poor flame resistance and gas barrier properties. [9,10] Improved barrier, mechanical, and flame resistant properties have been reported when montmorillonite clay (MMT) is used as a reinforcing agent in cellulose-based films. [11][12][13] The performance of polymer-clay barrier films is determined primarily by the clay characteristics (e.g., aspect ratio and density) and dispersion properties (i.e., clay exfoliation and orientation). For cellulose/clay composites, different methods to increase the interaction between clay and cellulose have been reported, including TEMPO-oxidation and by adding poly(vinyl alcohol) or chitosan (CH) as a compatibilizer. [14][15][16] Recently, cationic CNF with a quaternary ammonium functionality has been reported. [17] It was shown that the ionic interaction between the cationic CNF and MMT results in better mechanical properties of the composite, but further improvement is limited due to the formation of nanovoids as well as relatively low clay loading. [12,18] Layer-by-layer (LbL) assembly is a nanocoating technique that has been used to construct functional thin films for gas barrier and gas separation coatings, [19,20] energy storage and conversion, [21,22] drug delivery, [23] and adhesives. [24] By alternately depositing oppositely charged polyelectrolytes and/or clay platelets onto a charged substrate, thin films are assembled with high clay concentration and alignment. [25] In the present study, multilayer films consisting of anionic vermiculite (VMT) clay, with a high aspect ratio (≈2000), and cationic cellulose nanofibrils were investigated. This unique combination of highly aligned VMT platelets and cellulose nanofibrils forms a nanobrick wall structure with high transparency, excellent oxygen barrier, and fire resistance (superior to any other cellulose-based film previously reported). A 20 bilayer (BL) CNF/VMT nanocoating, with a thickness of 136 nm, exhibits a low oxygen transmission rate (OTR) of 0.013 cc (m 2 day atm) -1 . With only 2 BL of CNF/VMT, the melting of flexible polyurethane (PU) foam is prevented when exposed to a butane torch flame. These nanocoatings also exhibit high elastic modulus Cellulose nanofibrils (CNF) are abundant in the fiber cell walls of many plants and are considered a nearly inexhaustible resource. With the goal of improving the flame resistance and gas barrier properties of cellulose-based films, cationic CNF are assembled with anionic vermiculite (VMT) clay using the layer-by-layer deposition process. The highly aligned VMT nanoplatelets, together with cellulose nanofibrils, form a nanobrick wall structure that exhibits high optical transparency, flame resistance, super oxygen barrier, and high modulus. A 20 CNF/VMT...

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“…Today, new TFC membranes can be prepared from organic and inorganic materials using different modern technologies [7]. The physical and chemical properties of TFC membranes can be tuned for many applications, including fuel cells [8,9], gas [10][11][12], and liquid [13] separation/purification and various water treatment processes [7,[14][15][16]. For this purpose, the upper thin layer and the nonselective porous support can be optimized separately.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the Salt Stability of Layer‐by‐Layer Self‐Assembled Films From Polyelectrolyte Blends by Quartz Crystal Microbalance‐Dissipation and Their Ion Separation Performances

Ergün

Tümer

Cengiz

et al. 2020

Polymer Engineering & Sci

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Our study is concerned with the development of a novel type of layer-by-layer (LbL) self-assembled membrane from a single cationic polyelectrolyte (PE) and blended anionic PEs. Their synthetic seawater stability is investigated as a function of PE type and blend ratios using quartz crystal microbalance-dissipation (QCM-D). These materials adsorbed into multilayers with significant viscoelasticity. Poly(allylamine hydrochloride) (PAH) and poly(vinylamine hydrochloride) (PVA) based LbL blend films did not show any multilayer decomposition with the addition of synthetic seawater regardless of blend ratio while chitosan based multilayers disintegrated. The flux of PVA based blend membrane to water with 1,000 ppm NaCl was found to be 6.7 L/ m 2 .h at 40 bar and the flux properties of the membranes were highly dependent on both the thickness and hydrophilicity of multilayers. Ion rejection can be controlled with the charge of the top layer consistent with a Donnan exclusion approach. Sodium ion rejection of 60.5 layered LbL blend membrane was 98.4% at 40 bar and it was determined that sodium ion rejection improved 110.7% compared to a commercial nanofiltration membrane. POLYM. ENG. SCI., 60:1006-1018, 2020

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Highly selective multilayer polymer thin films for CO₂/N₂ separation

Cited by 15 publications

References 63 publications

Top-Down Polyelectrolytes for Membrane-Based Post-Combustion CO2 Capture

Top-Down Polyelectrolytes for Membrane-Based Post-Combustion CO2 Capture

Super Gas Barrier and Fire Resistance of Nanoplatelet/Nanofibril Multilayer Thin Films

Monitoring the Salt Stability of Layer‐by‐Layer Self‐Assembled Films From Polyelectrolyte Blends by Quartz Crystal Microbalance‐Dissipation and Their Ion Separation Performances

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Highly selective multilayer polymer thin films for CO2/N2 separation

Cited by 15 publications

References 63 publications

Top-Down Polyelectrolytes for Membrane-Based Post-Combustion CO2 Capture

Top-Down Polyelectrolytes for Membrane-Based Post-Combustion CO2 Capture

Super Gas Barrier and Fire Resistance of Nanoplatelet/Nanofibril Multilayer Thin Films

Monitoring the Salt Stability of Layer‐by‐Layer Self‐Assembled Films From Polyelectrolyte Blends by Quartz Crystal Microbalance‐Dissipation and Their Ion Separation Performances

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Highly selective multilayer polymer thin films for CO₂/N₂ separation