Solvent‐Templated Block Ionomers for Base‐ and Acid‐Gas Separations: Effect of Humidity on Ammonia and Carbon Dioxide Permeation

Ansaloni, Luca; Dai, Zhongde; Ryan, J. J.; Mineart, Kenneth P.; Yu, Qiang; Saud, Keara T.; Hägg, May‐Britt; Spontak, Richard J.; Deng, Liyuan

doi:10.1002/admi.201700854

Cited by 27 publications

(16 citation statements)

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“…While the morphology of this membrane is anticipated to consist of ion-rich spherical micelles embedded in a nonpolar matrix, the lack of higher-order peaks makes such assignment inconclusive. We note, however, that the second peak ratio, estimated as 2.65 (√7), likely corresponds to spheres arranged (loosely) on a As reported earlier 15,28,29 , SAXS profiles acquired from TIPA-cast TESET copolymers are difficult to interpret since the morphologies are not highly ordered. While the principal peak is sharp, the shoulder on the peak indicates the existence of a weak scattering peak in the vicinity of 0.250 nm −1 .…”

Section: Resultsmentioning

confidence: 48%

“…Endeavors aimed at improving the gas transport properties of TESET membranes are of considerable importance to broaden their potential application in gas separation. Measurements from a previous study, for instance, reveal that the presence of water vapor in the feed can significantly enhance CO 2 transport, yielding CO 2 permeability and CO 2 /N 2 selectivity values of~100 Barrer and~50, respectively 15 . Here, we employ four solvents varying in polarity to dissolve and cast TESET membranes.…”

Section: Introductionmentioning

confidence: 96%

“…In the present study, we investigate the role of casting solvent on CO 2 transport through a novel polymeric material that displays considerable promise for amphoteric (acidic and basic) gas separation 15 . This amphiphilic material, designated here as TESET to reflect its composition, is a poly[tert-butylstyrene-b-(ethylene-alt-propylene)-b-(styrene-r-styrenesulfonate)-b-(ethylene-alt-propylene)-b-tert-butylstyrene] pentablock polymer, the chemical structure of which is depicted in Scheme 1.…”

Section: Introductionmentioning

confidence: 99%

“…Due to differences in block chemistry (see Scheme 1), the TESET membrane morphology can be templated through judicious choice of solvent or cosolvent 26,27 . For example, spherical or lamellar + cylindrical morphologies develop when the membrane is cast from single or mixed solvents varying in polarity 15,27,28 , whereas solvent-vapor annealing can promote the formation of highly ordered and oriented lamellae 28 .…”

Section: Introductionmentioning

confidence: 99%

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Highly CO2-permeable membranes derived from a midblock-sulfonated multiblock polymer after submersion in water

et al. 2019

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To mitigate the effect of atmospheric CO 2 on global climate change, gas separation materials that simultaneously exhibit high CO 2 permeability and selectivity in gas mixtures must be developed. In this study, CO 2 transport through midblock-sulfonated block polymer membranes prepared from four different solvents is investigated. The results presented here establish that membrane morphology and accompanying gas transport properties are sensitive to casting solvent and relative humidity. We likewise report an intriguing observation: submersion of these thermoplastic elastomeric membranes in liquid water, followed by drying prior to analysis, promotes not only a substantial change in membrane morphology, but also a significant improvement in both CO 2 permeability and CO 2 /N 2 selectivity. Measured CO 2 permeability and CO 2 /N 2 selectivity values of 482 Barrer and 57, respectively, surpass the Robeson upper bound, indicating that these nanostructured membranes constitute promising candidates for gas separation technologies aimed at CO 2 capture.

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Section: Resultsmentioning

confidence: 48%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Highly CO2-permeable membranes derived from a midblock-sulfonated multiblock polymer after submersion in water

et al. 2019

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“…Block ionomers (BIs), charged block copolymers possessing at least one block with ionic moieties, combine the ability of BCs to microphase order with the hydrophilic/ionophilic nature of polyelectrolytes and are therefore of interest in fuel cells and water purification . In addition, they have been utilized as electroactive media, amphoteric gas‐separation membranes, and organic photovoltaics . Unlike their BC analogs, BIs suffer from a significant complication–the formation of ionic clusters, which often trap nonequilibrium morphologies.…”

Section: Methodsmentioning

confidence: 99%

Ordering and Grain Growth in Charged Block Copolymer Bulk Films: A Comparison of Solvent‐Related Processes

Ryan

Mineart

Lee

et al. 2018

Adv Materials Inter

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for ubiquitous nanotechnologies. [1][2][3][4] Thermodynamic incompatibility [5][6][7] drives BCs to order into an assortment of classical (e.g., spherical, cylindrical, or lamellar) or spatially complex (e.g., gyroid, [8] helical, [9] or Fddd [10,11] ) morphologies. Judicious chemical design of BCs in terms of factors, such as chemical constitution [12][13][14] and molecular composition, weight and architecture, [15] as well as targeted blending with solvents [16,17] or other macromolecules, [18,19] yields customized phase behavior and properties, as well as morphologies with specific spatial characteristics. While some BC morphologies are intentionally defective for connectivity purposes, [20,21] most efforts have endeavored to generate near-equilibrium nanostructures that can compare directly with theory [22,23] or establish definitive structure-property relationships. [24] More recently, directed self-assembly strategies that rely on BC crystallization, [25,26] chemical coordination, [26] or surface-induced alignment [27] have resulted in nearly monodisperse nanofibers grown in living fashion, designer superstructures with hierarchical features, or nanotemplates with precise spatial modulation, respectively. Another important aspect of morphological control includes orientation, which is crucial in the development of anisotropic mechanical properties, [28] defect-free diffusive pathways, [29] or wavelength-specific photonic guides. [30,31] Methods that promote morphological refinement and orientation in nonpolar BCs rely on thermal [32,33] and solvent [34,35] treatment.Block ionomers (BIs), charged block copolymers possessing at least one block with ionic moieties, combine the ability of BCs to microphase order [36,37] with the hydrophilic/ionophilic nature of polyelectrolytes and are therefore of interest in fuel cells [38] and water purification. [39,40] In addition, they have been utilized as electroactive media, [41] amphoteric gas-separation membranes, [42][43][44] and organic photovoltaics. [45] Unlike their BC analogs, BIs suffer from a significant complication-the formation of ionic clusters, which often trap nonequilibrium morphologies. To avoid degradation issues of BI bulk films induced by thermal annealing, we have previously reported that the nanostructural elements in BIs can be not only solvent templated [46] during film casting but also solvent annealed [47] to promote equilibration of dried films. Here, we consider three poly[While prior efforts have demonstrated that the morphologies of block copolymer (BC) bulk films can be controlled through judicious chemical design and thermal annealing, recent interest has focused on regulating the orientation of BC nanostructures and minimizing defects. Thermal processes developed to achieve this purpose for nonpolar BCs are not, however, suitable for orienting microphase-ordered BCs composed of at least one block with charged moieties that can form thermally stable ionic clusters. To overcome this challenge, we have previously applied solvent-vapor (...

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Rapid and Repetitive Inactivation of SARS‐CoV‐2 and Human Coronavirus on Self‐Disinfecting Anionic Polymers

et al. 2021

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While the ongoing COVID‐19 pandemic affirms an urgent global need for effective vaccines as second and third infection waves are spreading worldwide and generating new mutant virus strains, it has also revealed the importance of mitigating the transmission of SARS‐CoV‐2 through the introduction of restrictive social practices. Here, it is demonstrated that an architecturally‐ and chemically‐diverse family of nanostructured anionic polymers yield a rapid and continuous disinfecting alternative to inactivate coronaviruses and prevent their transmission from contact with contaminated surfaces. Operating on a dramatic pH‐drop mechanism along the polymer/pathogen interface, polymers of this archetype inactivate the SARS‐CoV‐2 virus, as well as a human coronavirus surrogate (HCoV‐229E), to the minimum detection limit within minutes. Application of these anionic polymers to frequently touched surfaces in medical, educational, and public‐transportation facilities, or personal protection equipment, can provide rapid and repetitive protection without detrimental health or environmental complications.

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Solvent‐Templated Block Ionomers for Base‐ and Acid‐Gas Separations: Effect of Humidity on Ammonia and Carbon Dioxide Permeation

Cited by 27 publications

References 40 publications

Highly CO2-permeable membranes derived from a midblock-sulfonated multiblock polymer after submersion in water

Highly CO2-permeable membranes derived from a midblock-sulfonated multiblock polymer after submersion in water

Ordering and Grain Growth in Charged Block Copolymer Bulk Films: A Comparison of Solvent‐Related Processes

Rapid and Repetitive Inactivation of SARS‐CoV‐2 and Human Coronavirus on Self‐Disinfecting Anionic Polymers

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