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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/61936

    Título
    Super-insulating transparent polyisocyanurate-polyurethane aerogels: Analysis of thermal conductivity and mechanical properties
    Autor
    Merillas Valero, BeatrizAutoridad UVA
    Villafañe González, FernandoAutoridad UVA Orcid
    Rodríguez Pérez, Miguel ÁngelAutoridad UVA Orcid
    Año del Documento
    2022
    Editorial
    MDPI
    Descripción
    Producción Científica
    Documento Fuente
    Nanomaterials, 2022, Vol. 12, Nº. 14, 2409
    Resumen
    A family of transparent polyisocyanurate-polyurethane (PUR-PIR) aerogels with an interesting combination of physical properties were synthesized. First, their textural properties were analyzed aiming to study catalyst influence on the final porous structures and densities. Their thermal conductivities were measured at different temperatures allowing observation of a clear trend relating the initial formulation with the porous structure and reaching values as low as 12 mW/mK, the lowest found in the literature for aerogels based on this polymer matrix. Contributions to thermal conductivity were calculated, improving the understanding of the porous structure-insulating performance relationship. Moreover, their mechanical properties were studied (elastic modulus, stress at different strains and elastic behavior). The aerogels showed tunable stiffness (elastic modulus from 6.32 to 0.13 MPa) by changing the catalyst concentration and significant elasticity. Thus, super-insulating transparent PUR-PIR aerogels with tailored mechanical properties were obtained opening a wide range of potential applications in the energy, building, automotive and aeronautical sectors, among others. The exceptional insulation of silica aerogels was reached at the same time that their general brittleness was improved while keeping good transparency to visible light (85%, 650 nm). Therefore, these aerogels may constitute an alternative to silica aerogels.
    Materias (normalizadas)
    Polymers
    Polyurethane foam
    Espumas poliméricas de poliuretano - Propiedade mecánicas
    Composite materials
    Gels
    Aerogel
    Thermal insulation
    Aislamiento térmico
    Mechanical properties
    Chemistry
    Materials science
    Materias Unesco
    23 Química
    2206.10 Polímeros
    2211.02 Materiales Compuestos
    Palabras Clave
    Polyisocyanurate
    Poliisocianurato
    ISSN
    2079-4991
    Revisión por pares
    SI
    DOI
    10.3390/nano12142409
    Patrocinador
    Ministerio de Ciencia, Innovación y Universidades - (grant FPU17/03299)
    Ministerio de Ciencia, Innovación y Universidades - (project RTI2018-098749-B-I00)
    Junta de Castilla y León y Ente Público Regional de la Energía de Castilla y León (EREN_2019_L4_UVA) - (Grant VA202P20)
    Version del Editor
    https://www.mdpi.com/2079-4991/12/14/2409
    Propietario de los Derechos
    © 2022 The Authors
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/61936
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP63 - Artículos de revista [324]
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    Super-Insulating-Transparent-Polyisocyanurate-Polyurethane-Aerogels.pdf
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