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grants","award":["LA\/P\/0007\/2021"],"award-info":[{"award-number":["LA\/P\/0007\/2021"]}]},{"name":"PhD grants","award":["SFRH\/BD\/148170\/2019"],"award-info":[{"award-number":["SFRH\/BD\/148170\/2019"]}]},{"name":"PhD grants","award":["COVID\/BD\/153647\/2024"],"award-info":[{"award-number":["COVID\/BD\/153647\/2024"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Membranes"],"abstract":"<jats:p>CO2 separation is an important environmental method mainly used in reducing CO2 emissions to mitigate anthropogenic climate change. The use of mixed-matrix membranes (MMMs) arrives as a possible answer, combining the high selectivity of inorganic membranes with high permeability of organic membranes. However, the combination of these materials is challenging due to their opposing nature, leading to poor interactions between polymeric matrix and inorganic fillers. Many additives have been tested to reduce interfacial voids, some of which showed potential in dealing with compatibility problems, but most of them lack further studies and optimization. Deep eutectic solvents (DESs) have emerged as IL substitutes since they are cheaper and environmentally friendly. Choline chloride-based deep eutectic solvents were studied as additives in polyethersulfone (PES)\/SAPO-34 membranes to improve CO2 permeability and CO2\/N2 and CO2\/CH4 selectivity. SAPO-34 crystals of 150 nm with a high surface area and microporosity were synthesized using dry-gel methodology. The PES\/SAPO-34 membranes were optimized following previous work and used in a defined composition, using 5 or 10 w\/w% of DES during membrane preparation. All MMMs were characterized by their ideal gas permeability using N2 and CO2 pure gasses. Selected membranes were also tested using CH4 pure gas. The results presented that 5 w\/w%, in polymer mass, of ChCl\u2013glycerol presented the best result over the synthesized membranes. An increase of 200% in CO2 permeability maintains the CO2\/N2 selectivity for the non-modified PES\/SAPO-34 membrane. A CO2\/CH4 selectivity of 89.7 was obtained in PES\/SAPO-34\/ChCl-glycerol membranes containing 5 w\/w% of this DES, which is an outstanding ideal separation performance for MMMs when compared to other results in the literature. FTIR analysis reiterates the presence of glycerol in the membranes prepared. Dynamic Mechanical Thermal Analysis (DMTA) shows that the addition of 5 w\/w% of DES does not impact the membrane flexibility or polymer structure. However, in concentrations higher than 10 w\/w%, the inclusion of DES could lead to high membrane rigidification without impacting the overall thermal resistance. SEM analysis of DES-enhanced membranes presented asymmetric final membranes and reaffirmed the results obtained in DMTA about rigidified structures and lower zeolite\u2013polymer interaction with higher concentrations of DES.<\/jats:p>","DOI":"10.3390\/membranes14110230","type":"journal-article","created":{"date-parts":[[2024,11,5]],"date-time":"2024-11-05T05:30:53Z","timestamp":1730784653000},"page":"230","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Enhancing CO2\/N2 and CO2\/CH4 Separation Properties of PES\/SAPO-34 Membranes Using Choline Chloride-Based Deep Eutectic Solvents as Additives"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2845-5803","authenticated-orcid":false,"given":"Jonathan S.","family":"Cardoso","sequence":"first","affiliation":[{"name":"Chemical Engineering and Renewable Resources for Sustainability (CERES), Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, P\u00f3lo II, Rua S\u00edlvio Lima, 3030-790 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5984-7228","authenticated-orcid":false,"given":"Zhi","family":"Lin","sequence":"additional","affiliation":[{"name":"Centre for Research in Ceramics and Composite Materials (CICECO), Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1805-0252","authenticated-orcid":false,"given":"Paulo","family":"Brito","sequence":"additional","affiliation":[{"name":"Mountain Research Centre (CIMO), Polytechnic Institute of Bragan\u00e7a, Campus de Santa Apol\u00f3nia, 5300-253 Bragan\u00e7a, Portugal"},{"name":"Associate Laboratory for Sustainability and Technology in Mountains Regions (SusTEC), Polytechnic Institute of Bragan\u00e7a, Campus de Santa Apol\u00f3nia, 5300-253 Bragan\u00e7a, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0739-1238","authenticated-orcid":false,"given":"Lic\u00ednio M.","family":"Gando-Ferreira","sequence":"additional","affiliation":[{"name":"Chemical Engineering and Renewable Resources for Sustainability (CERES), Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, P\u00f3lo II, Rua S\u00edlvio Lima, 3030-790 Coimbra, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2024,11,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2733","DOI":"10.1039\/C9EE01384A","article-title":"Redefining the Robeson Upper Bounds for CO2\/CH4 and CO2\/N2 Separations Using a Series of Ultrapermeable Benzotriptycene-Based Polymers of Intrinsic Microporosity","volume":"12","author":"Chen","year":"2019","journal-title":"Energy Environ. Sci."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"165","DOI":"10.1016\/0376-7388(91)80060-J","article-title":"Correlation of Separation Factor versus Permeability for Polymeric Membranes","volume":"62","author":"Robeson","year":"1991","journal-title":"J. Membr. Sci."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"390","DOI":"10.1016\/j.memsci.2008.04.030","article-title":"The Upper Bound Revisited","volume":"320","author":"Robeson","year":"2008","journal-title":"J. Membr. Sci."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1016\/S0376-7388(97)00194-4","article-title":"Tailoring Mixed Matrix Composite Membranes for Gas Separations","volume":"137","author":"Zimmerman","year":"1997","journal-title":"J. Membr. Sci."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"375","DOI":"10.1016\/j.jiec.2012.09.019","article-title":"Polymeric Mixed Matrix Membranes Containing Zeolites as a Filler for Gas Separation Applications: A Review","volume":"19","author":"Bastani","year":"2013","journal-title":"J. Ind. Eng. Chem."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"311","DOI":"10.1016\/S0376-7388(02)00429-5","article-title":"Mixed Matrix Membranes Using Carbon Molecular Sieves","volume":"211","author":"Vu","year":"2003","journal-title":"J. Membr. Sci."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"04008","DOI":"10.1051\/matecconf\/202133304008","article-title":"Nano-Porous Zeolite and MOF Filled Mixed Matrix Membranes for Gas Separation","volume":"333","author":"Liu","year":"2021","journal-title":"MATEC Web Conf."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1189","DOI":"10.1126\/science.ade1411","article-title":"Truly Combining the Advantages of Polymeric and Zeolite Membranes for Gas Separations","volume":"378","author":"Tan","year":"2022","journal-title":"Science"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"109712","DOI":"10.1016\/j.micromeso.2019.109712","article-title":"High-Performance SAPO-34 Membranes for CO2 Separations from Simulated Flue Gas","volume":"292","author":"Liu","year":"2020","journal-title":"Microporous Mesoporous Mater."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"10","DOI":"10.1016\/j.memsci.2016.06.031","article-title":"Polysulfone-Ionic Liquid Based Membranes for CO2\/N2 Separation with Tunable Porous Surface Features","volume":"518","author":"Lu","year":"2016","journal-title":"J. Memb. Sci."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"176","DOI":"10.1016\/j.seppur.2018.05.040","article-title":"Effect of Zeolite Surface Modification with Ionic Liquid [APTMS][Ac] on Gas Separation Performance of Mixed Matrix Membranes","volume":"205","author":"Ilyas","year":"2018","journal-title":"Sep. Purif. Technol."},{"key":"ref_12","first-page":"180","article-title":"Surface Functionalized SAPO-34 for Mixed Matrix Membranes in CO2\/CH4 and CO2\/N2 Separations","volume":"52","author":"Cardoso","year":"2023","journal-title":"Sep. Purif. Rev."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1016\/j.apsusc.2017.03.045","article-title":"Composites of Ionic Liquid and Amine-Modified SAPO 34 Improve CO2 separation of CO2-Selective Polymer Membranes","volume":"410","author":"Hu","year":"2017","journal-title":"Appl. Surf. Sci."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"3726","DOI":"10.1016\/j.matpr.2020.12.986","article-title":"Post-Synthetic Amine Functionalized SAPO-5 & SAPO-34 Molecular Sieves for Epoxide Ring Opening Reactions","volume":"Volume 45","author":"Jadav","year":"2020","journal-title":"Proceedings of the Materials Today: Proceedings"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"52","DOI":"10.1016\/j.micromeso.2013.10.006","article-title":"The Effects of Solvents on the Modification of SAPO-34 Zeolite Using 3-Aminopropyl Trimethoxy Silane for the Preparation of Asymmetric Polysulfone Mixed Matrix Membrane in the Application of CO2 Separation","volume":"192","author":"Junaidi","year":"2014","journal-title":"Microporous Mesoporous Mater."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"306","DOI":"10.1016\/j.memsci.2008.03.067","article-title":"Enhanced Gas Permeation Performance of Polyethersulfone Mixed Matrix Hollow Fiber Membranes Using Novel Dynasylan Ameo Silane Agent","volume":"319","author":"Ismail","year":"2008","journal-title":"J. Membr. Sci."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"25","DOI":"10.1016\/j.proeng.2016.06.477","article-title":"Effect of [EMIM][Tf2N] Ionic Liquid on Ionic Liquid-Polymeric Membrane (ILPM) for CO2\/CH4 Separation","volume":"148","author":"Mannan","year":"2016","journal-title":"Procedia Eng."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"98","DOI":"10.1016\/j.jiec.2017.05.022","article-title":"Synthesis, Characterization, and CO2 Separation Performance of Polyether Sulfone\/[EMIM][Tf2N] Ionic Liquid-Polymeric Membranes (ILPMs)","volume":"54","author":"Mannan","year":"2017","journal-title":"J. Ind. Eng. Chem."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1016\/j.memsci.2009.12.018","article-title":"A Three-Component Mixed-Matrix Membrane with Enhanced CO2 Separation Properties Based on Zeolites and Ionic Liquid Materials","volume":"350","author":"Hudiono","year":"2010","journal-title":"J. Membr. Sci."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1016\/j.memsci.2011.01.012","article-title":"Novel Mixed Matrix Membranes Based on Polymerizable Room-Temperature Ionic Liquids and SAPO-34 Particles to Improve CO2 Separation","volume":"370","author":"Hudiono","year":"2011","journal-title":"J. Membr. Sci."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"216","DOI":"10.1016\/j.fuproc.2017.12.022","article-title":"CO2 Absorption and Diffusion in Ionic Liquid [P66614][Triz] Modified Molecular Sieves SBA-15 with Various Pore Lengths","volume":"172","author":"Hu","year":"2018","journal-title":"Fuel Process. Technol."},{"key":"ref_22","first-page":"322","article-title":"Polyurethane-SAPO-34 Mixed Matrix Membrane for CO2\/CH4 and CO2\/N2 Separation","volume":"27","author":"Asghari","year":"2018","journal-title":"Chin. J. Chem. Eng."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1016\/j.memsci.2015.03.078","article-title":"SAPO-34 Membranes for N2\/CH4 Separation: Preparation, Characterization, Separation Performance and Economic Evaluation","volume":"487","author":"Huang","year":"2015","journal-title":"J. Membr. Sci."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1016\/j.jiec.2014.12.039","article-title":"Gas Permeation and Sorption Properties of Poly(Amide-12-b-Ethyleneoxide)(Pebax1074)\/SAPO-34 Mixed Matrix Membrane for CO2, CH4 and CO2 Separation","volume":"27","author":"Rabiee","year":"2015","journal-title":"J. Ind. Eng. Chem."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"247","DOI":"10.1016\/j.memsci.2018.07.034","article-title":"Enhanced Separation Performance of PES Ultrafiltration Membranes by Imidazole-Based Deep Eutectic Solvents as Novel Functional Additives","volume":"564","author":"Jiang","year":"2018","journal-title":"J. Membr. Sci."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"239","DOI":"10.1016\/j.seppur.2017.11.036","article-title":"Deep Eutectic Solvent as Novel Additive for PES Membrane with Improved Performance","volume":"194","author":"Jiang","year":"2018","journal-title":"Sep. Purif. Technol."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"3320","DOI":"10.1016\/j.egypro.2017.12.464","article-title":"Development of Low-Cost Deep Eutectic Solvents for CO2 Capture","volume":"142","author":"Ma","year":"2017","journal-title":"Energy Procedia"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"117593","DOI":"10.1016\/j.seppur.2020.117593","article-title":"Supported Liquid Membranes Based on Deep Eutectic Solvents for Gas Separation Processes","volume":"254","author":"Craveiro","year":"2021","journal-title":"Sep. Purif. Technol."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"436","DOI":"10.1016\/j.rser.2018.08.007","article-title":"Choline-Based Deep Eutectic Solvents for CO2 Separation: Review and Thermodynamic Analysis","volume":"97","author":"Zhang","year":"2018","journal-title":"Renew. Sustain. Energy Rev."},{"key":"ref_30","unstructured":"John, S., Peter, W., and Tom, W. (2008). Ionic Liquids in Synthesis, WILEY-VCH Verlags GmbH & Co."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1071\/CH03231","article-title":"Ionic Liquids\u2014An Overview","volume":"57","author":"Forsyth","year":"2004","journal-title":"Aust. J. Chem."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"106414","DOI":"10.1016\/j.jece.2021.106414","article-title":"Deep Eutectic Solvents\u2014A New Platform in Membrane Fabrication and Membrane-Assisted Technologies","volume":"10","author":"Galiano","year":"2022","journal-title":"J. Environ. Chem. Eng."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"2616","DOI":"10.1021\/ef5028873","article-title":"Deep Eutectic Solvents: Physicochemical Properties and Gas Separation Applications","volume":"29","author":"Aparicio","year":"2015","journal-title":"Energy Fuels"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"121563","DOI":"10.1016\/j.molliq.2023.121563","article-title":"Comparison of Physicochemical and Thermal Properties of Choline Chloride and Betaine-Based Deep Eutectic Solvents: The Influence of Hydrogen Bond Acceptor and Hydrogen Bond Donor Nature and Their Molar Ratios","volume":"377","author":"Mero","year":"2023","journal-title":"J. Mol. Liq."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"962","DOI":"10.1007\/s10953-018-0793-1","article-title":"Insights into the Nature of Eutectic and Deep Eutectic Mixtures","volume":"48","author":"Martins","year":"2019","journal-title":"J. Solut. Chem."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"114","DOI":"10.1007\/s10853-013-7682-1","article-title":"Sulfonated Polyethersulfone-Based Membranes for Metal Ion Removal via a Hybrid Process","volume":"49","author":"Thanigaivelan","year":"2014","journal-title":"J. Mater. Sci."},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Alenazi, N., Hussein, M., Alamry, K., and Asiri, A. (2018). Nanocomposite-Based Aminated Polyethersulfone and Carboxylate Activated Carbon for Environmental Application. A Real Sample Analysis. C, 4.","DOI":"10.3390\/c4020030"},{"key":"ref_38","doi-asserted-by":"crossref","unstructured":"Du, C., Zhao, B., Chen, X.B., Birbilis, N., and Yang, H. (2016). Effect of Water Presence on Choline Chloride-2urea Ionic Liquid and Coating Platings from the Hydrated Ionic Liquid. Sci. Rep., 6.","DOI":"10.1038\/srep29225"},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"1759","DOI":"10.22146\/ijc.76759","article-title":"Simple Green Routes for Metal-Bixin Complexes Synthesis Using Glycerol-Based Deep Eutectic Solvent","volume":"22","author":"Rahmalia","year":"2022","journal-title":"Indones. J. Chem."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1016\/j.fluid.2017.03.008","article-title":"Monoethanolamine-Based Deep Eutectic Solvents, Their Synthesis and Characterization","volume":"448","author":"Mjalli","year":"2017","journal-title":"Fluid Phase Equilibria"},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"194","DOI":"10.1016\/j.memsci.2007.07.010","article-title":"Development of Polycarbonate Based Zeolite 4A Filled Mixed Matrix Gas Separation Membranes","volume":"303","author":"Yilmaz","year":"2007","journal-title":"J. Membr Sci."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"45","DOI":"10.1016\/j.memsci.2012.06.011","article-title":"Effect of Feed Gas Composition on the Separation of CO2\/CH4 Mixtures by PES-SAPO 34-HMA Mixed Matrix Membranes","volume":"417\u2013418","author":"Cakal","year":"2012","journal-title":"J. Membr. Scir"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"514","DOI":"10.1252\/jcej.18we241","article-title":"Preparation and Permeation Properties of PeSU-Based Mixed Matrix Membranes with Nano-Sized CHA Zeolites","volume":"52","author":"Wu","year":"2019","journal-title":"J. Chem. Eng. Jpn."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"8498","DOI":"10.1002\/app.40679","article-title":"Effect of Gas Permeation Temperature and Annealing Procedure on the Performance of Binary and Ternary Mixed Matrix Membranes of Polyethersulfone, SAPO-34, and 2-Hydroxy 5-Methyl Aniline","volume":"131","author":"Oral","year":"2014","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"13927","DOI":"10.1021\/acs.iecr.1c01522","article-title":"Mixed Matrix Membranes Incorporated with Aminosilane-Functionalized SAPO-34 for Upgrading CO2\/CH4 Separation Performances","volume":"60","author":"Zhao","year":"2021","journal-title":"Ind. Eng. Chem. Res."},{"key":"ref_46","doi-asserted-by":"crossref","unstructured":"Cardoso, J.S., Lin, Z., Brito, P., and Gando-Ferreira, L.M. (2023). The Functionalization of PES\/SAPO-34 Mixed Matrix Membrane with [Emim][Tf2N] Ionic Liquid to Improve CO2\/N2 Separation Properties. Inorganics, 11.","DOI":"10.3390\/inorganics11110447"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"290","DOI":"10.1039\/C6NJ03140D","article-title":"Screening of Deep Eutectic Solvents (DESs) as Green CO2 Sorbents: From Solubility to Viscosity","volume":"41","author":"Sarmad","year":"2016","journal-title":"New J. Chem."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"112845","DOI":"10.1016\/j.micromeso.2023.112845","article-title":"Optimization and Performance Studies of PES\/SAPO-34 Membranes for CO2\/N2 Gas Separation","volume":"364","author":"Cardoso","year":"2023","journal-title":"Microporous Mesoporous Mater."}],"container-title":["Membranes"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2077-0375\/14\/11\/230\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T16:26:31Z","timestamp":1760113591000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2077-0375\/14\/11\/230"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,11,5]]},"references-count":48,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2024,11]]}},"alternative-id":["membranes14110230"],"URL":"https:\/\/doi.org\/10.3390\/membranes14110230","relation":{},"ISSN":["2077-0375"],"issn-type":[{"value":"2077-0375","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,11,5]]}}}