دورية أكاديمية
Mixed matrix membranes loaded with a porous organic polymer having bipyridine moieties
| العنوان: | Mixed matrix membranes loaded with a porous organic polymer having bipyridine moieties |
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| المؤلفون: | Rico Martínez, Sandra, Álvarez, Cristina, Hernández Giménez, Antonio, Miguel García, Jesús Ángel, Lozano, Ángel E. |
| بيانات النشر: | MDPI |
| سنة النشر: | 2022 |
| المجموعة: | UVaDOC - Repositorio Documental de la Universidad de Valladolid |
| مصطلحات موضوعية: | Polymers, Polímeros y polimerización, Gases - Separation, Polyimides, Porous materials, Carbon dioxide, Mixed matrix membranes, CO2 capture |
| الوصف: | Producción Científica ; Mixed matrix membranes (MMMs), derived from three aromatic polyimides (PIs), and an affordable porous organic polymer (POP) having basic bipyridine moieties were prepared. Matrimid and two fluorinated polyimides, which were derived from 4,4′-(hexafluoroisopropylidene)diphthalic anhydride and 2,2′-bis(4-aminophenyl)hexafluoropropane (6F6F) or 2,4,6-trimethyl-m-phenylenediamine (6FTMPD), were employed as polymer matrixes. The used POP was a highly microporous material (surface area of 805 m2 g−1) with excellent thermal and chemical stability. The MMMs showed good compatibility between the PIs and POP, high thermal stabilities and glass transition temperatures superior to those of the neat PI membranes, and good mechanical properties. The addition of POP to the matrix led to an increase in the gas diffusivity and, thus, in permeability, which was associated with an increase in the fractional free volume of MMMs. The increase in permeability was higher for the less permeable matrix. For example, at 30 wt.% of POP, the permeability to CO2 and CH4 of the MMMs increased by 4- and 7-fold for Matrimid and 3- and 4-fold for 6FTMPD. The highest CH4 permeability led to a decrease in CO2/CH4 selectivity. The CO2/N2 separation performance was interesting, as the selectivity remained practically constant. Finally, the POP showed no molecular sieving effect towards the C2H4/C2H6 and C3H6/C3H8 gas pairs, but the permeability increased by about 4-fold and the selectivity was close to that of the matrix. In addition, because the POP can form metal ion bipyridine complexes, modified POP-based MMMs could be employed for olefin/paraffin separations. ; Gobierno de España (Agencia Estatal de Investigación) - (Projects PID2019- 109403RB-C21, PID2019-109403RB-C22, and PID2020-118547GB-I00) ; Junta de Castilla y León, Unión Europea y Fondo Europeo de Desarrollo Regional (FEDER) - (Projects CLU2017-09, UIC082, VA088G19 and VA224P20) |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2077-0375 |
| العلاقة: | https://www.mdpi.com/2077-0375/12/6/547Test; https://doi.org/10.3390/membranes12060547Test; Membranes, 2022, Vol. 12, Nº. 6, 547; https://uvadoc.uva.es/handle/10324/59317Test; 547; Membranes; 12 |
| DOI: | 10.3390/membranes12060547 |
| الإتاحة: | https://doi.org/10.3390/membranes12060547Test https://uvadoc.uva.es/handle/10324/59317Test |
| حقوق: | Atribución 4.0 Internacional ; info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/4.0Test/ ; © 2022 The Authors |
| رقم الانضمام: | edsbas.BE62540F |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 20770375 |
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| DOI: | 10.3390/membranes12060547 |