Mixed Matrix Membranes Based on Torlon<sup>®</sup> and ZIF-8 for High-Temperature, Size-Selective Gas Separations
Torlon<sup>®</sup> is a thermally and plasticization-resistant polyamide imide characterized by low gas permeability at room temperature. In this work, we aimed at improving the polymer performance in the thermally-enhanced He/CO<sub>2</sub> and H<sub>2</sub>/CO&l...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/11/12/982 |
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| author | Matilde De Pascale Francesco Maria Benedetti Elsa Lasseuguette Maria-Chiara Ferrari Kseniya Papchenko Micaela Degli Esposti Paola Fabbri Maria Grazia De Angelis |
| author_facet | Matilde De Pascale Francesco Maria Benedetti Elsa Lasseuguette Maria-Chiara Ferrari Kseniya Papchenko Micaela Degli Esposti Paola Fabbri Maria Grazia De Angelis |
| author_sort | Matilde De Pascale |
| collection | DOAJ |
| description | Torlon<sup>®</sup> is a thermally and plasticization-resistant polyamide imide characterized by low gas permeability at room temperature. In this work, we aimed at improving the polymer performance in the thermally-enhanced He/CO<sub>2</sub> and H<sub>2</sub>/CO<sub>2</sub> separations, by compounding Torlon<sup>®</sup> with a highly permeable filler, ZIF-8, to fabricate Mixed Matrix Membranes (MMMs). The effect of filler loading, gas size, and temperature on the MMMs permeability, diffusivity, and selectivity was investigated. The He permeability increased by a factor of 3, while the He/CO<sub>2</sub> selectivity decreased by a factor of 2, when adding 25 wt % of ZIF-8 at 65 °C to Torlon<sup>®</sup>; similar trends were observed for the case of H<sub>2</sub>. The MMMs permeability and size-selectivity were both enhanced by temperature. The behavior of MMMs is intermediate between the pure polymer and pure filler ones, and can be described with models for composites, indicating that such materials have a good polymer/filler adhesion and their performance could be tailored by acting on the formulation. The behavior observed is in line with previous investigations on MMMs based on glassy polymers and ZIF-8, in similar conditions, and indicates that ZIF-8 can be used as a polymer additive when the permeability is a controlling aspect, with a proper choice of loading and operative temperature. |
| first_indexed | 2024-03-10T03:35:43Z |
| format | Article |
| id | doaj.art-f49f27859de04762b2edeba06fb2cc9e |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T03:35:43Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-f49f27859de04762b2edeba06fb2cc9e2023-11-23T09:30:48ZengMDPI AGMembranes2077-03752021-12-01111298210.3390/membranes11120982Mixed Matrix Membranes Based on Torlon<sup>®</sup> and ZIF-8 for High-Temperature, Size-Selective Gas SeparationsMatilde De Pascale0Francesco Maria Benedetti1Elsa Lasseuguette2Maria-Chiara Ferrari3Kseniya Papchenko4Micaela Degli Esposti5Paola Fabbri6Maria Grazia De Angelis7Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, ItalyDepartment of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, ItalySchool of Engineering, University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh EH9 3FB, Scotland, UKSchool of Engineering, University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh EH9 3FB, Scotland, UKDepartment of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, ItalyDepartment of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, ItalyDepartment of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, ItalyDepartment of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, ItalyTorlon<sup>®</sup> is a thermally and plasticization-resistant polyamide imide characterized by low gas permeability at room temperature. In this work, we aimed at improving the polymer performance in the thermally-enhanced He/CO<sub>2</sub> and H<sub>2</sub>/CO<sub>2</sub> separations, by compounding Torlon<sup>®</sup> with a highly permeable filler, ZIF-8, to fabricate Mixed Matrix Membranes (MMMs). The effect of filler loading, gas size, and temperature on the MMMs permeability, diffusivity, and selectivity was investigated. The He permeability increased by a factor of 3, while the He/CO<sub>2</sub> selectivity decreased by a factor of 2, when adding 25 wt % of ZIF-8 at 65 °C to Torlon<sup>®</sup>; similar trends were observed for the case of H<sub>2</sub>. The MMMs permeability and size-selectivity were both enhanced by temperature. The behavior of MMMs is intermediate between the pure polymer and pure filler ones, and can be described with models for composites, indicating that such materials have a good polymer/filler adhesion and their performance could be tailored by acting on the formulation. The behavior observed is in line with previous investigations on MMMs based on glassy polymers and ZIF-8, in similar conditions, and indicates that ZIF-8 can be used as a polymer additive when the permeability is a controlling aspect, with a proper choice of loading and operative temperature.https://www.mdpi.com/2077-0375/11/12/982mixed matrix membranesCO<sub>2</sub> capturegas separation |
| spellingShingle | Matilde De Pascale Francesco Maria Benedetti Elsa Lasseuguette Maria-Chiara Ferrari Kseniya Papchenko Micaela Degli Esposti Paola Fabbri Maria Grazia De Angelis Mixed Matrix Membranes Based on Torlon<sup>®</sup> and ZIF-8 for High-Temperature, Size-Selective Gas Separations Membranes mixed matrix membranes CO<sub>2</sub> capture gas separation |
| title | Mixed Matrix Membranes Based on Torlon<sup>®</sup> and ZIF-8 for High-Temperature, Size-Selective Gas Separations |
| title_full | Mixed Matrix Membranes Based on Torlon<sup>®</sup> and ZIF-8 for High-Temperature, Size-Selective Gas Separations |
| title_fullStr | Mixed Matrix Membranes Based on Torlon<sup>®</sup> and ZIF-8 for High-Temperature, Size-Selective Gas Separations |
| title_full_unstemmed | Mixed Matrix Membranes Based on Torlon<sup>®</sup> and ZIF-8 for High-Temperature, Size-Selective Gas Separations |
| title_short | Mixed Matrix Membranes Based on Torlon<sup>®</sup> and ZIF-8 for High-Temperature, Size-Selective Gas Separations |
| title_sort | mixed matrix membranes based on torlon sup r sup and zif 8 for high temperature size selective gas separations |
| topic | mixed matrix membranes CO<sub>2</sub> capture gas separation |
| url | https://www.mdpi.com/2077-0375/11/12/982 |
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