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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/62300

    Título
    Supercritical foaming and impregnation of polycaprolactone and polycaprolactone-hydroxyapatite composites with carvacrol
    Autor
    Satpayeva, Alina
    Rojas, Adrián
    Tyrka, Marcin
    Ksepko, Ewelina
    Galotto, María José
    Zizovic, Irena
    Año del Documento
    2022
    Editorial
    MDPI
    Descripción
    Producción Científica
    Documento Fuente
    Processes, 2022, Vol. 10, Nº. 3, 482
    Zusammenfassung
    Polycaprolactone (PCL) and polycaprolactone-hydroxyapatite (PCL-HA) scaffolds were produced by foaming in supercritical carbon dioxide (scCO2) at 20 MPa, as well as in one-step foaming and impregnation process using carvacrol as an antibacterial agent with proven activity against Gram-positive and Gram-negative bacteria. The experimental design was developed to study the influence of temperature (40 °C and 50 °C), HA content (10 and 20 wt.%), and depressurization rate (one and two-step decompression) on the foams’ morphology, porosity, pore size distribution, and carvacrol impregnation yield. The characterization of the foams was carried out using scanning electron microscopy (SEM, SEM-FIB), Gay-Lussac density bottle measurements, and Fourier–transform infrared (FTIR) analyses. The obtained results demonstrate that processing PCL and PCL-HA scaffolds by means of scCO2 foaming enables preparing foams with porosity in the range of 65.55–74.39% and 61.98–67.13%, at 40 °C and 50 °C, respectively. The presence of carvacrol led to a lower porosity. At 40 °C and one-step decompression at a slow rate, the porosity of impregnated scaffolds was higher than at 50 °C and two- step fast decompression. However, a narrower pore size distribution was obtained at the last processing conditions. PCL scaffolds with HA resulted in higher carvacrol impregnation yields than neat PCL foams. The highest carvacrol loading (10.57%) was observed in the scaffold with 10 wt.% HA obtained at 50 °C.
    Materias (normalizadas)
    Supercritical carbon dioxide
    Supercritical CO2
    Carbon dioxide
    Dióxido de carbono
    Polycaprolactone
    Polymers
    Biodegradable
    Hydroxyapatite
    Scaffold
    Foam
    Espumas poliméricas
    Carvacrol
    Antibacterial agents
    Antiinfecciosos
    Materias Unesco
    3303 Ingeniería y Tecnología Químicas
    2206.10 Polímeros
    ISSN
    2227-9717
    Revisión por pares
    SI
    DOI
    10.3390/pr10030482
    Patrocinador
    Narodowe Centrum Nauki (Polonia) - (grant 2018/31/B/ ST8/01826)
    Agencia Nacional de Investigación y Desarrollo de Chile (ANID) - (project 120130)
    Programa de Financiamiento Basal para Centros Científicos y Tecnológicos de Excelencia - (Project AFB180001)
    Version del Editor
    https://www.mdpi.com/2227-9717/10/3/482
    Propietario de los Derechos
    © 2022 The Authors
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/62300
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP48 - Artículos de revista [265]
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    Dateien zu dieser Ressource
    Nombre:
    Supercritical-Foaming.pdf
    Tamaño:
    1.864Mb
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    Universidad de Valladolid

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