dc.contributor.author | Kammakakam, Irshad | |
dc.contributor.author | Bara, Jason E. | |
dc.contributor.author | Jackson, Enrique M. | |
dc.contributor.author | Lertxundi, Josu | |
dc.contributor.author | Mecerreyes Molero, David | |
dc.contributor.author | Tomé, Liliana C. | |
dc.date.accessioned | 2020-10-08T16:01:22Z | |
dc.date.available | 2020-10-08T16:01:22Z | |
dc.date.issued | 2020-03-25 | |
dc.identifier.citation | ACS Sustainable Chemistry & Engineering 8(15) : 5954–5965 (2020) | es_ES |
dc.identifier.issn | 2168-0485 | |
dc.identifier.uri | http://hdl.handle.net/10810/46627 | |
dc.description | Unformatted post print | es_ES |
dc.description.abstract | Polymeric membranes either containing, or built from, ionic liquids (ILs) are of great interest for enhanced CO2/light gas separation due to the stronger affinity of ILs toward quadrupolar CO2 molecules, and hence, high CO2 solubility selectivity. Herein, we report the development of a series of four novel anionic poly(IL)-IL composite membranes via a photopolymerization method for effective CO2 separation. Interestingly, these are the first examples of anionic poly(IL)-IL composite systems, in which the poly(IL) component has delocalized sulfonimide anions pendant from the polymer backbone with imidazolium cations as “free” counterions. Two types of photopolymerizable methacryloxy-based IL monomers (MILs) with highly delocalized anions (–SO2–N(-)–SO2–CF3 and –SO2–N(-)–SO2–C7H7) and mobile imidazolium ([C2mim]+) counter cations were successfully synthesized and photopolymerized with two distinct amounts of free IL containing the same structural cation ([C2mim][Tf2N]) and 20 wt% PEGDA crosslinker, to serve as a composite matrix. The structure-property relationships of the four newly developed anionic poly(IL)-IL composite membranes were extensively characterized by TGA, DSC, and XRD analysis. All of the newly developed anionic poly(IL)-IL composite membranes exhibited superior CO2/CH4 and CO2/N2 selectivities together with moderate CO2/H2 selectivity and reasonable CO2 permeabilities. The membrane with an optimal composition and polymer architecture (MIL-C7H7/PEGDA(20%)/IL(1eq.)) reaches the 2008 Robeson upper bound limit of CO2/CH4, due to the simultaneous improvement in permeability and selectivity (CO2 permeability ~ 20 barrer and αCO2/CH4 ~119). This study provides a promising strategy to explore the benefits of anionic poly(IL)-IL composites to separate CO2 from flue gas, natural gas, and syngas streams and open up new possibilities in the polymer membrane design with strong candidate materials for practical applications. | es_ES |
dc.description.sponsorship | Partial support for this work provided by the United States Department of Energy (DE-SC0020282) and NASA Marshall Space Flight Center (80NSSC19K1314), is gratefully acknowledged. Liliana C. Tomé has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement no. 745734. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | ACS | es_ES |
dc.relation | info:eu-repo/grantAgreement/H2020/745734 | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.subject | Anionic Poly(IL)s | es_ES |
dc.subject | Photopolymerization | es_ES |
dc.subject | Composite Membranes | es_ES |
dc.subject | Gas Separation | es_ES |
dc.subject | CO2 Selectivity | es_ES |
dc.title | Tailored CO2-philic Anionic Poly(ionic liquid) Composite Membranes: Synthesis, Characterization and Gas Transport Properties | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | © 2020 American Chemical Society | es_ES |
dc.relation.publisherversion | https://pubs.acs.org/doi/10.1021/acssuschemeng.0c00327 | es_ES |
dc.identifier.doi | 10.1021/acssuschemeng.0c00327 | |
dc.contributor.funder | European Commission | |
dc.departamentoes | Ciencia y tecnología de polímeros | es_ES |
dc.departamentoeu | Polimeroen zientzia eta teknologia | es_ES |