The Functionalization of PES/SAPO-34 Mixed Matrix Membrane with [emim][Tf<sub>2</sub>N] Ionic Liquid to Improve CO<sub>2</sub>/N<sub>2</sub> Separation Properties
The use of ionic liquid [emim][Tf<sub>2</sub>N] as an additive in polyethersulphone (PES) and nano-sized silico-aluminophosphate-34 (SAPO-34) mixed matrix membrane was studied through the incorporation of different amounts of [emim][Tf<sub>2</sub>N] in the membrane compositio...
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MDPI AG
2023-11-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/11/11/447 |
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| author | Jonathan S. Cardoso Zhi Lin Paulo Brito Licínio M. Gando-Ferreira |
| author_facet | Jonathan S. Cardoso Zhi Lin Paulo Brito Licínio M. Gando-Ferreira |
| author_sort | Jonathan S. Cardoso |
| collection | DOAJ |
| description | The use of ionic liquid [emim][Tf<sub>2</sub>N] as an additive in polyethersulphone (PES) and nano-sized silico-aluminophosphate-34 (SAPO-34) mixed matrix membrane was studied through the incorporation of different amounts of [emim][Tf<sub>2</sub>N] in the membrane composition, as presented in this work, varying from 10 to 40 wt%. Through gas permeation tests using CO<sub>2</sub> and N<sub>2</sub>, the membrane composition containing 20 wt% [emim][Tf<sub>2</sub>N] led to the highest increase in CO<sub>2</sub> permeability and CO<sub>2</sub>/N<sub>2</sub> selectivity. The use of low concentrations of additive (10–20 wt%) promoted a state called antiplasticization; in this state, the permeability was even more regulated by the kinetic diameter of the species which, in this work, permitted achieving a higher CO<sub>2</sub>/N<sub>2</sub> selectivity while increasing the CO<sub>2</sub> permeability until an optimal condition. [emim][Tf<sub>2</sub>N] also promoted a better dispersion of SAPO-34 particles and an increase in the flexibility of the polymeric matrix when compared to a film with the same composition without [emim][Tf<sub>2</sub>N]. Moreover, the characterizations corroborated that the inclusion of [emim][Tf<sub>2</sub>N] increased the zeolite dispersion and improved the polymer/zeolite compatibility and membrane flexibility, characterized by a decrease in glass transition temperature, which helped in the fabrication process while presenting a similar thermal resistance and hydrophilicity as neat PES membrane, without affecting the membrane structure, as indicated by FTIR and a contact angle analysis. |
| first_indexed | 2024-03-09T16:43:59Z |
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| language | English |
| last_indexed | 2024-03-09T16:43:59Z |
| publishDate | 2023-11-01 |
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| series | Inorganics |
| spelling | doaj.art-66838aadad9a41abbe5e41bd3ae6bb1c2023-11-24T14:48:30ZengMDPI AGInorganics2304-67402023-11-01111144710.3390/inorganics11110447The Functionalization of PES/SAPO-34 Mixed Matrix Membrane with [emim][Tf<sub>2</sub>N] Ionic Liquid to Improve CO<sub>2</sub>/N<sub>2</sub> Separation PropertiesJonathan S. Cardoso0Zhi Lin1Paulo Brito2Licínio M. Gando-Ferreira3CIEPQPF, Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Pólo II, Rua Sílvio Lima, 3030-790 Coimbra, PortugalCICECO, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, PortugalMountain Research Centre (CIMO), Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5300-253 Bragança, PortugalCIEPQPF, Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Pólo II, Rua Sílvio Lima, 3030-790 Coimbra, PortugalThe use of ionic liquid [emim][Tf<sub>2</sub>N] as an additive in polyethersulphone (PES) and nano-sized silico-aluminophosphate-34 (SAPO-34) mixed matrix membrane was studied through the incorporation of different amounts of [emim][Tf<sub>2</sub>N] in the membrane composition, as presented in this work, varying from 10 to 40 wt%. Through gas permeation tests using CO<sub>2</sub> and N<sub>2</sub>, the membrane composition containing 20 wt% [emim][Tf<sub>2</sub>N] led to the highest increase in CO<sub>2</sub> permeability and CO<sub>2</sub>/N<sub>2</sub> selectivity. The use of low concentrations of additive (10–20 wt%) promoted a state called antiplasticization; in this state, the permeability was even more regulated by the kinetic diameter of the species which, in this work, permitted achieving a higher CO<sub>2</sub>/N<sub>2</sub> selectivity while increasing the CO<sub>2</sub> permeability until an optimal condition. [emim][Tf<sub>2</sub>N] also promoted a better dispersion of SAPO-34 particles and an increase in the flexibility of the polymeric matrix when compared to a film with the same composition without [emim][Tf<sub>2</sub>N]. Moreover, the characterizations corroborated that the inclusion of [emim][Tf<sub>2</sub>N] increased the zeolite dispersion and improved the polymer/zeolite compatibility and membrane flexibility, characterized by a decrease in glass transition temperature, which helped in the fabrication process while presenting a similar thermal resistance and hydrophilicity as neat PES membrane, without affecting the membrane structure, as indicated by FTIR and a contact angle analysis.https://www.mdpi.com/2304-6740/11/11/447gas separationmixed matrix membranesionic liquidpolyethersulfoneSAPO-34 |
| spellingShingle | Jonathan S. Cardoso Zhi Lin Paulo Brito Licínio M. Gando-Ferreira The Functionalization of PES/SAPO-34 Mixed Matrix Membrane with [emim][Tf<sub>2</sub>N] Ionic Liquid to Improve CO<sub>2</sub>/N<sub>2</sub> Separation Properties Inorganics gas separation mixed matrix membranes ionic liquid polyethersulfone SAPO-34 |
| title | The Functionalization of PES/SAPO-34 Mixed Matrix Membrane with [emim][Tf<sub>2</sub>N] Ionic Liquid to Improve CO<sub>2</sub>/N<sub>2</sub> Separation Properties |
| title_full | The Functionalization of PES/SAPO-34 Mixed Matrix Membrane with [emim][Tf<sub>2</sub>N] Ionic Liquid to Improve CO<sub>2</sub>/N<sub>2</sub> Separation Properties |
| title_fullStr | The Functionalization of PES/SAPO-34 Mixed Matrix Membrane with [emim][Tf<sub>2</sub>N] Ionic Liquid to Improve CO<sub>2</sub>/N<sub>2</sub> Separation Properties |
| title_full_unstemmed | The Functionalization of PES/SAPO-34 Mixed Matrix Membrane with [emim][Tf<sub>2</sub>N] Ionic Liquid to Improve CO<sub>2</sub>/N<sub>2</sub> Separation Properties |
| title_short | The Functionalization of PES/SAPO-34 Mixed Matrix Membrane with [emim][Tf<sub>2</sub>N] Ionic Liquid to Improve CO<sub>2</sub>/N<sub>2</sub> Separation Properties |
| title_sort | functionalization of pes sapo 34 mixed matrix membrane with emim tf sub 2 sub n ionic liquid to improve co sub 2 sub n sub 2 sub separation properties |
| topic | gas separation mixed matrix membranes ionic liquid polyethersulfone SAPO-34 |
| url | https://www.mdpi.com/2304-6740/11/11/447 |
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