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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/62854

    Título
    Characterization and properties of water-blown rigid polyurethane foams reinforced with silane-modified nanosepiolites functionalized with graphite
    Autor
    Santiago Calvo, Mercerdes
    Carracedo Pérez, María
    Puertas, María Luisa
    Esteban Cubillo, Antonio
    Santarén, Julio
    Villafañe González, FernandoAutoridad UVA Orcid
    Rodríguez Pérez, Miguel ÁngelAutoridad UVA Orcid
    Año del Documento
    2022
    Editorial
    MDPI
    Descripción
    Producción Científica
    Documento Fuente
    Materials, 2022, Vol. 15, Nº. 1, 381
    Resumo
    In the present study, a promising flame retardant consisting of 80 wt% silane-modified nanosepiolites functionalized with 20 wt% graphite (SFG) is used to obtain a synergistic effect principally focussed on the thermal stability of water-blown rigid polyurethane (RPU) foams. Density, microcellular structure, thermal stability and thermal conductivity are examined for RPU foams reinforced with different contents of SFG (0, as reference material, 2, 4 and 6 wt%). The sample with 6 wt% SFG presents a slightly thermal stability improvement, although its cellular structure is deteriorated in comparison with the reference material. Furthermore, the influence of SFG particles on chemical reactions during the foaming process is studied by FTIR spectroscopy. The information obtained from the chemical reactions and from isocyanate consumption is used to optimize the formulation of the foam with 6 wt% SFG. Additionally, in order to determine the effects of functionalization on SFG, foams containing only silane-modified nanosepiolites, only graphite, or silane-modified nanosepiolites and graphite added separately are studied here as well. In conclusion, the inclusion of SFG in RPU foams allows the best performance to be achieved.
    Materias (normalizadas)
    Flame retardant
    Polymers
    Poliuretans
    Polyurethane foam
    Espumas poliméricas de poliuretano - Propiedades mecánicas
    Thermal stability
    Graphite
    Grafito
    Condensed Matter Physics
    Física de la materia condensada
    Materials science
    Materias Unesco
    2304.21 Poliuretanos
    2206.10 Polímeros
    3312 Tecnología de Materiales
    ISSN
    1996-1944
    Revisión por pares
    SI
    DOI
    10.3390/ma15010381
    Patrocinador
    Junta de Castilla y León - (Grant VA202P20)
    Junta de Castilla y León, Ente Público Regional de la Energía de Castilla y León - (EREN_2019_L4_UVA)
    Version del Editor
    https://www.mdpi.com/1996-1944/15/1/381
    Propietario de los Derechos
    © 2022 The Authors
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/62854
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • Cellmat - Artículos de Revista [4]
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    Characterization-and-Properties-of-Water-Blown-Rigid-Polyurethane-Foams.pdf
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    Universidad de Valladolid

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