Highly permeable novel PDMS coated asymmetric polyethersulfone membranes loaded with SAPO-34 zeolite for carbon dioxide separation

Haider, Bilal; Dilshad, Muhammad Rizwan; Rehman, Muhammad Atiq Ur; Schmitz, Jürgen Vargas; Kaspereit, Malte

doi:10.1016/j.seppur.2020.116899

Cited by 34 publications

(15 citation statements)

References 55 publications

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“…The presence of these defects is a symptom of a membrane with low selectivity that needs to be coated to perform defect healing. Herein, we have coated the membranes with a dense PDMS layer, which is a widely used procedure for the correction of pinhole defects in membranes for gas separation [ 38 , 39 , 40 , 41 ]. The effect of PDMS on the diffusive transport through the dense membrane is negligible when there is a difference of several orders of magnitude in their intrinsic permeability coefficients, as is the case for our PEEK–WC-based MMMs.…”

Section: Resultsmentioning

confidence: 99%

PEEK–WC-Based Mixed Matrix Membranes Containing Polyimine Cages for Gas Separation

et al. 2021

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Membrane-based processes are taking a more and more prominent position in the search for sustainable and energy-efficient gas separation applications. It is known that the separation performance of pure polymers may significantly be improved by the dispersion of suitable filler materials in the polymer matrix, to produce so-called mixed matrix membranes. In the present work, four different organic cages were dispersed in the poly(ether ether ketone) with cardo group, PEEK-WC. The m-xylyl imine and furanyl imine-based fillers yielded mechanically robust and selective films after silicone coating. Instead, poor dispersion of p-xylyl imine and diphenyl imine cages did not allow the formation of selective films. The H2, He, O2, N2, CH4, and CO2 pure gas permeability of the neat polymer and the MMMs were measured, and the effect of filler was compared with the maximum limits expected for infinitely permeable and impermeable fillers, according to the Maxwell model. Time lag measurements allowed the calculation of the diffusion coefficient and demonstrated that 20 wt % of furanyl imine cage strongly increased the diffusion coefficient of the bulkier gases and decreased the diffusion selectivity, whereas the m-xylyl imine cage slightly increased the diffusion coefficient and improved the size-selectivity. The performance and properties of the membranes were discussed in relation to their composition and morphology.

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Section: Resultsmentioning

confidence: 99%

PEEK–WC-Based Mixed Matrix Membranes Containing Polyimine Cages for Gas Separation

et al. 2021

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“…This is attributed to the reduction of intermolecular cohesive energy because of the obstruction of more preformed hydrogen bonds by inserting zeolites 44 . At the same time, the final char yields remarkably increase from 0% of neat Pebax to 16% of Pebax/SAPO‐20% owing to the contribution of thermal stable zeolites 45–46 . Besides, the thermal weight loss trend of the MMMs slows down in the range of 450–500°C, and the temperature at the maximum thermal weight loss rate increases from 457 to 459°C.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of Pebax/SAPO mixed matrix membranes for CO₂/N₂ separation

Zhang

Zheng

et al. 2021

J of Applied Polymer Sci

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Mixed matrix membranes (MMMs) were prepared by solvent evaporation method using Pebax‐1074 polymer as matrix and inorganic zeolite SAPO‐23 as dopant. The morphology, surface functional groups, microstructure, thermal stability, and separation performance of MMMs were analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, thermogravimetric analysis, and gas permeation, respectively. The effects of dopant loading amount, permeation temperature, and permeation pressure on the structure and properties of MMMs were investigated. The results showed that the introduction of SAPO zeolite reduced the crystallinity of the MMMs and improved the CO2/N2 selectivity. Under the conditions of 30°C and 0.15 MPa, the MMMs prepared by incorporating with 5% SAPO zeolite in content exhibited the highest CO2/N2 selectivity of 72.0 together with the CO2 permeability of 98.2 Barrer.

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“…In all the spectra, the broad peak found near 3274 cm �1 was due to stretching vibrations of H-bonded -OH 47,48 and H-bonded N-H groups. 49 The stretching peak at 2935 cm �1 was due to C-H groups [50][51][52] of the protein and the peak at 1425 cm �1 was attributed to C-H bending vibration. 38,53 The appearance of the peak at 1732 cm �1 was related to the vibration of free carbonyl groups -C¼O due to the hydrolysis of PVA.…”

Section: Ftir Analysismentioning

confidence: 99%

Synergistic effect of silane cross-linker (APTEOS) on PVA/gelatin blend films for packaging applications

Zeeshan¹,

Dilshad

Islam³

et al. 2021

High Performance Polymers

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The objective of this work is to fabricate hydrogel films which are biodegradable and also fit for packaging applications. The hydrogel films were prepared by the reaction of polyvinyl alcohol and gelatin with and without 3-aminopropyltriethoxysilane (APTEOS) cross-linker. The hydrogel films were then characterized by FTIR spectroscopy, degree of swelling, TGA, SEM analysis and mechanical testing. The FTIR spectra of the hydrogel films confirmed the presence of both polymers and hydrogen bonding between them. TGA analysis confirmed the increase in thermal stability with the increase of cross-linker amount. SEM analysis confirmed the increase in uniformity of structure with the increase of cross-linker amount. The increase in cross-linker amount resulted in decrease of degree of swelling and increase of tensile strength. The biodegradability of hydrogel films was evaluated by performing soil burial test and found to be decreased with the increase of cross-linker amount. In order to balance the tensile strength and biodegradability, the optimum amount of cross-linker was determined which resulted in the formation of the best performing film. Finally, our best performing film was compared with other hydrogel films reported in the literature. Hence, the hydrogel films cross-linked with APTEOS are biodegradable, having high tensile strength and suitable for packaging purpose.

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Highly permeable novel PDMS coated asymmetric polyethersulfone membranes loaded with SAPO-34 zeolite for carbon dioxide separation

Cited by 34 publications

References 55 publications

PEEK–WC-Based Mixed Matrix Membranes Containing Polyimine Cages for Gas Separation

PEEK–WC-Based Mixed Matrix Membranes Containing Polyimine Cages for Gas Separation

Fabrication of Pebax/SAPO mixed matrix membranes for CO₂/N₂ separation

Synergistic effect of silane cross-linker (APTEOS) on PVA/gelatin blend films for packaging applications

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Highly permeable novel PDMS coated asymmetric polyethersulfone membranes loaded with SAPO-34 zeolite for carbon dioxide separation

Cited by 34 publications

References 55 publications

PEEK–WC-Based Mixed Matrix Membranes Containing Polyimine Cages for Gas Separation

PEEK–WC-Based Mixed Matrix Membranes Containing Polyimine Cages for Gas Separation

Fabrication of Pebax/SAPO mixed matrix membranes for CO2/N2 separation

Synergistic effect of silane cross-linker (APTEOS) on PVA/gelatin blend films for packaging applications

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Fabrication of Pebax/SAPO mixed matrix membranes for CO₂/N₂ separation