A comparative study between single gas and mixed gas permeation of polyether-block-amide type copolymer membranes

Martínez-Izquierdo, Lidia; Perea-Cachero, Adelaida; Malankowska, Magdalena; Téllez, Carlos; Coronas, Joaquı́n

doi:10.1016/j.jece.2022.108324

Cited by 28 publications

(27 citation statements)

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“…The XRD diffractogram shown in Figure 3 B confirms the correct synthesis of the ZIF-8 layer (with some shielding from the polymer coating) with the presence of the most intense and characteristic peaks of ZIF-8 (7.4, 10.4 and 12.7°) in agreement with the simulated pattern [ 32 ]. It can also be seen the characteristic peaks of Pebax ® 3533 at 5.8, 11.3 and 22.4° [ 29 , 33 , 34 ]. In addition, the more defined ZIF-8 peaks in the Pebax ® /ZIF-8/SWCNT-bp-SC correlate with the lower thickness of the polymer layer obtained by the spin-coating technique and observed by SEM ( Figure 2 C,D).…”

Section: Resultsmentioning

confidence: 99%

Double-Layered Pebax® 3533/ZIF-8 Membranes with Single-Walled Carbon Nanotube Buckypapers as Support for Gas Separation

2023

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Single-walled carbon nanotube buckypapers (SWCNT-bps) coated with a metal–organic framework ZIF-8 layer were used as supports for the preparation of Pebax® 3533 TFC membranes by both phase inversion and spin coating techniques. Upon proper characterization of the materials by X-ray diffraction, IR spectroscopy, thermogravimetry and electron microscopy, the obtained membranes were tested in gas separation experiments with a 15:85 CO2/N2 mixture. These experiments proved that the ZIF-8 layer prevented from the penetration of the polymer selective film into the SWCNT-bp support, giving rise to a highly permeable selective membrane. The optimum membrane was achieved by the spin-coating method, with better permeation results than that prepared by the phase inversion method, obtaining a CO2 permeance of 566 GPU together with a CO2/N2 selectivity of 20.9.

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Section: Resultsmentioning

confidence: 99%

Double-Layered Pebax® 3533/ZIF-8 Membranes with Single-Walled Carbon Nanotube Buckypapers as Support for Gas Separation

2023

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“…Some grades of PEBAX show higher CO 2 permeability and CO 2 /light gas selectivity compared to the conventional glassy and rubbery polymer materials. [65][66][67][68] Table 2 shows the composition of some grades of PEBAX, which earned a reputation for gas separation application. Among these grades, PEBAX 2533 has the highest polyether content and is the most permeable polymer.…”

Section: Influence Of Polarity Cohesive Energy Density and Morphology...mentioning

confidence: 99%

“…Some grades of PEBAX show higher CO 2 permeability and CO 2 /light gas selectivity compared to the conventional glassy and rubbery polymer materials. [ 65–68 ]…”

Section: Multiblock Copolymers With Polyether Segmentsmentioning

confidence: 99%

Material Design Concepts and Gas Separation Mechanism of CO₂Selective Polyether‐Based Multiblock Copolymers

Rahman

2023

Macromol. Rapid Commun.

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Aliphatic polyethers have been widely explored as membrane materials for the separation of CO 2 from other gases, e.g., N 2 , H 2 , CH 4, O 2 etc. The polymeric membranes having aliphatic polyether segments, especially poly(ethylene oxide) segments, allow faster permeation of CO 2 compared to the light gases due to the affinity of the polar ether oxygen and quadrupolar CO 2 . Rational macromolecular design is the key to control the permeation of gases through these membrane materials. In this regard, multiblock copolymers having short amorphous polyether segments have been extensively investigated. A large number of tailor made polymers have been reported to get the best combination of permeability and selectivity. Material design concepts and structure-property relationships of these membrane materials in terms of CO 2 separation performance are thoroughly discussed in this review.

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“…Pebax contains glassy rigid polyamide blocks separated by rubbery flexible polyether segments. − The former offers mechanical strength while the latter behaves as the permeable phase. Various polymeric membranes comprising both glassy and rubbery polymers are used for gas separation. − The separation performance of Pebax membranes is affected by the percentage and type of rigid and flexible segments in the block copolymer as well as the operating temperature . The strong interactions between carbon dioxide and the polar linkages in the Pebax materials result in high carbon dioxide/nonpolar gas solubility selectivity in these polymers. ,,− …”

Section: Introductionmentioning

confidence: 99%

Incorporating Microporous Zn₃ and Zn₂Cd MOFs into Pebax/PVDF Mixed Matrix Membranes for Improved Carbon Dioxide Separation Performance

Basafa

Parsons

Berdichevsky

et al. 2023

ACS Appl. Energy Mater.

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A pair of related metal–organic frameworks (Zn 3 and Zn 2 Cd) developed in our group were incorporated into Pebax 30R51 and PVDF Kynar 761 polymers to fabricate mixed matrix membranes (MMMs). These MOFs were chosen due to the carbon dioxide molecular sieving ability of Zn 3 , and the slightly larger pore aperture of Zn 2 Cd that allows carbon dioxide and larger gases to enter the pores. For Pebax-based MMMs, this work demonstrated an over two-fold and four-and-a-half-fold increase in carbon dioxide permeability for Zn 3 - (15 wt %) and Zn 2 Cd-containing (10 wt %) MMMs over the pristine polymer. Separation selectivity (CO2:N2) of 4.21 and 7.33 were observed for Zn 3 and Zn 2 Cd (10 wt %). For PVDF-based MMMs, the incorporation of Zn 3 and Zn 2 Cd (10 wt %) increased the carbon dioxide permeability approximately two- and three-fold. The CO2/N2 selectivity of the PVDF membranes increased 73% (1.01 to 1.86) and 68% (1.01 to 1.68) when 15 wt % Zn 3 and Zn 2 Cd were incorporated into PVDF. The improved performance of Pebax over PVDF based MMMs is attributed to matching the permeability of the polymer bulk phase (Pebax over PVDF) and the dispersed phase (Zn 3 and Zn 2 Cd). The lower permeability allows the MOF, which has slow kinetics associated with molecular sieving, to participate in the permeation process better. With regards to Zn 3 vs Zn 2 Cd, while Zn 3 acts as a molecular sieve and Zn 2 Cd does not, we hypothesize that the faster diffusion of carbon dioxide gas in Zn 2 Cd can outcompete the lower nitrogen gas permeability and molecular sieving properties of Zn 3 . However, we expect that further increasing the pore aperture would increase the permeabilities of nitrogen gas such that differences in diffusion kinetics due to molecular size would be unimportant.

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A comparative study between single gas and mixed gas permeation of polyether-block-amide type copolymer membranes

Cited by 28 publications

References 50 publications

Double-Layered Pebax® 3533/ZIF-8 Membranes with Single-Walled Carbon Nanotube Buckypapers as Support for Gas Separation

Double-Layered Pebax® 3533/ZIF-8 Membranes with Single-Walled Carbon Nanotube Buckypapers as Support for Gas Separation

Material Design Concepts and Gas Separation Mechanism of CO₂Selective Polyether‐Based Multiblock Copolymers

Incorporating Microporous Zn₃ and Zn₂Cd MOFs into Pebax/PVDF Mixed Matrix Membranes for Improved Carbon Dioxide Separation Performance

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A comparative study between single gas and mixed gas permeation of polyether-block-amide type copolymer membranes

Cited by 28 publications

References 50 publications

Double-Layered Pebax® 3533/ZIF-8 Membranes with Single-Walled Carbon Nanotube Buckypapers as Support for Gas Separation

Double-Layered Pebax® 3533/ZIF-8 Membranes with Single-Walled Carbon Nanotube Buckypapers as Support for Gas Separation

Material Design Concepts and Gas Separation Mechanism of CO2Selective Polyether‐Based Multiblock Copolymers

Incorporating Microporous Zn3 and Zn2Cd MOFs into Pebax/PVDF Mixed Matrix Membranes for Improved Carbon Dioxide Separation Performance

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Product

Resources

About

Material Design Concepts and Gas Separation Mechanism of CO₂Selective Polyether‐Based Multiblock Copolymers

Incorporating Microporous Zn₃ and Zn₂Cd MOFs into Pebax/PVDF Mixed Matrix Membranes for Improved Carbon Dioxide Separation Performance