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Article

Mixed Matrix Membranes Based on Torlon® and ZIF-8 for High-Temperature, Size-Selective Gas Separations

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Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, 40131 Bologna, Italy
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GVS S.p.A via Guido Rossa 30, 40069 Zola Predosa, Italy
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Osmoses Inc., 444 Somerville Ave, Somerville, MA 02143, USA
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School of Engineering, University of Edinburgh, Sanderson Building, Robert Stevenson Road, Edinburgh EH9 3FB, Scotland, UK
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Italian Consortium for Science and Technology of Materials (INSTM), 50121 Firenze, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Anthony G. Dixon
Membranes 2021, 11(12), 982; https://doi.org/10.3390/membranes11120982
Received: 11 November 2021 / Revised: 5 December 2021 / Accepted: 7 December 2021 / Published: 15 December 2021
(This article belongs to the Special Issue Polymer Membranes for Gas Separation, Volume II)
Torlon® 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/CO2 and H2/CO2 separations, by compounding Torlon® 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/CO2 selectivity decreased by a factor of 2, when adding 25 wt % of ZIF-8 at 65 °C to Torlon®; similar trends were observed for the case of H2. 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. View Full-Text
Keywords: mixed matrix membranes; CO2 capture; gas separation mixed matrix membranes; CO2 capture; gas separation
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MDPI and ACS Style

De Pascale, M.; Benedetti, F.M.; Lasseuguette, E.; Ferrari, M.-C.; Papchenko, K.; Degli Esposti, M.; Fabbri, P.; De Angelis, M.G. Mixed Matrix Membranes Based on Torlon® and ZIF-8 for High-Temperature, Size-Selective Gas Separations. Membranes 2021, 11, 982. https://doi.org/10.3390/membranes11120982

AMA Style

De Pascale M, Benedetti FM, Lasseuguette E, Ferrari M-C, Papchenko K, Degli Esposti M, Fabbri P, De Angelis MG. Mixed Matrix Membranes Based on Torlon® and ZIF-8 for High-Temperature, Size-Selective Gas Separations. Membranes. 2021; 11(12):982. https://doi.org/10.3390/membranes11120982

Chicago/Turabian Style

De Pascale, Matilde, Francesco Maria Benedetti, Elsa Lasseuguette, Maria-Chiara Ferrari, Kseniya Papchenko, Micaela Degli Esposti, Paola Fabbri, and Maria Grazia De Angelis. 2021. "Mixed Matrix Membranes Based on Torlon® and ZIF-8 for High-Temperature, Size-Selective Gas Separations" Membranes 11, no. 12: 982. https://doi.org/10.3390/membranes11120982

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