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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/59961

    Título
    Gas adsorption isotherm, pore size distribution, and free volume fraction of polymer-polymer mixed matrix membranes before and after thermal rearrangement
    Autor
    Soto Guzmán, Marvelia CenitAutoridad UVA
    Cicuttin, Noelia
    Carmona Del Rio, Francisco JavierAutoridad UVA Orcid
    Viuda, Mónica de la
    Tena Matias, AlbertoAutoridad UVA Orcid
    Lozano, Ángel E.
    Hernández Giménez, AntonioAutoridad UVA Orcid
    Palacio Martínez, LauraAutoridad UVA Orcid
    Prádanos del Pico, Pedro LourdesAutoridad UVA Orcid
    Año del Documento
    2023
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Journal of Membrane Science, 2023, Volume 683, 121841
    Resumo
    In this work, CO2 adsorption at 273.15 K and N2 adsorption at 77 K of mixed matrix membranes has been studied, as a method to directly determine their fractional free volume (FFV). These membranes consist of a continuous phase of copoly(o-hydroxyamide)s (HPA) or copoly(o-hydroxyamide-amide)s (PAA) and a relatively highly porous polymer network filler (PPN1). Both the pure copolymers and the mixed matrix membranes (MMMs) have been analyzed before and after a thermal rearrangement (TR) process. The CO2 adsorption results have allowed characterizing the pore size distribution of the studied membranes in the 3–15 Å range, by using the Non-Local Density Functional Theory (NLDFT). Whereas the N2 adsorption has allowed determining the pore size distributions in the range between 20 and 250 Å. The experimental determination of the pore volume and the density allows the direct calculation of the membranes’ free volume fractions, which were in good agreement with the most usual FFV evaluation methods. In addition, part of the pore volume detected by N2 adsorption was associated with defects and poor integration of the membrane components. This correction has allowed us to make a new evaluation of the density of these materials.
    Materias (normalizadas)
    Materials—Surfaces
    Ingeniería química
    Polimeros y polimerización
    Materias Unesco
    3303 Ingeniería y Tecnología Químicas
    Palabras Clave
    CO2 adsorption
    Free volume
    Porous polymer networks
    Adsorción de CO2
    Volumen libre
    Redes de polímeros porosos
    ISSN
    0376-7388
    Revisión por pares
    SI
    DOI
    10.1016/j.memsci.2023.121841
    Patrocinador
    Gobierno de España (AEI) proyects (PID2019-109403RB-C21/AEI/10.13039/501100011033 y PID2019-109403RB-C22/AEI/10.13039/501100011033)
    Junta de Castilla y León - EU-FEDER (CL-EI-2021-07, UIC082)
    Version del Editor
    https://www.sciencedirect.com/science/article/pii/S0376738823004970?via%3Dihub
    Propietario de los Derechos
    © 2023 The Authors
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/59961
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • SMAP - Artículos de revista [8]
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    Attribution-NonCommercial-NoDerivatives 4.0 InternacionalExceto quando indicado o contrário, a licença deste item é descrito como Attribution-NonCommercial-NoDerivatives 4.0 Internacional

    Universidad de Valladolid

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