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Efecto del uso de dbtdl (como catalizador órganometálico) en la síntesis de biomateriales tipo poliuretano a partir de aceite de higuerilla y nanocristales de celulosa

dc.contributor.advisorValero Valdivieso, Manuel Fernando
dc.contributor.authorVillegas Villalobos, Santiago
dc.date.accessioned2018-11-09T16:30:55Z
dc.date.available2018-11-09T16:30:55Z
dc.date.issued2018-09-26
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dc.identifier.urihttp://hdl.handle.net/10818/34393
dc.description62 Páginases_CO
dc.description.abstractSe sintetizaron materiales compuestos; poliuretano/celulosa a partir de polioles derivados de aceite de higuerilla y diisocianato de isoforona; usando dilaurato de dibutilestaño (DBTDL) como catalizador. Los materiales se obtuvieron mediante polimerización in situ, añadiendo 2% de celulosa en forma de microcristales (20 μm) o nanocristales obtenidos por hidrólisis ácida (294.07 ± 72.74 nm de largo y 29.26 ± 2.75 nm de ancho). La adición de catalizador resultó esencial para evitar la formación de agregados, logrando mejorar la resistencia a la tracción (112%) y el alargamiento a la rotura (79%) en los materiales en los que se empleó CNC, respecto a las muestras sintetizadas sin catalizador. El tamaño de partícula de la celulosa influyó en las propiedades de los materiales, ya que el uso de nanocristales aumentó las interacciones tipo puente de hidrógeno entre la superficie de la celulosa y los dominios de poliuretano, mejorando la estabilidad frente a la degradación hidrolítica. Todos los materiales sintetizados mantuvieron una viabilidad celular por encima del 70% frente a línea celular de ratón L929 en contacto directo por 24 h, y la adición de DBTDL no afectó su biocompatibilidad.es_CO
dc.formatapplication/pdfes_CO
dc.language.isospaes_CO
dc.publisherUniversidad de La Sabanaes_CO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectNanocristales -- Célulases_CO
dc.subjectAceite de ricinoes_CO
dc.subjectPolímeroses_CO
dc.subjectCatalizadoreses_CO
dc.titleEfecto del uso de dbtdl (como catalizador órganometálico) en la síntesis de biomateriales tipo poliuretano a partir de aceite de higuerilla y nanocristales de celulosaes_CO
dc.typemasterThesises_CO
dc.publisher.programMaestría en Diseño y Gestión de Procesoses_CO
dc.publisher.departmentFacultad de Ingenieríaes_CO
dc.type.hasVersionpublishedVersiones_CO
dc.rights.accessRightsrestrictedAccesses_CO
dc.creator.degreeMagíster en Diseño y Gestión de Procesoses_CO


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