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Biodegradable nanocomposites based on poly(ester-urethane) and nanosized hydroxyapatite: Plastificant and reinforcement effects

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Biodegradable nanocomposites based on poly(ester-urethane) and nanosized hydroxyapatite: Plastificant and reinforcement effects

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dc.contributor.author NAVARRO-BAENA, IVÁN es_ES
dc.contributor.author Arrieta, Marina Patricia es_ES
dc.contributor.author Sonseca Olalla, Agueda es_ES
dc.contributor.author Torre, Luigi es_ES
dc.contributor.author López, Daniel es_ES
dc.contributor.author Giménez Torres, Enrique es_ES
dc.contributor.author Kenny, Jose Mª es_ES
dc.contributor.author PEPONI, LAURA es_ES
dc.date.accessioned 2017-03-28T09:17:41Z
dc.date.available 2017-03-28T09:17:41Z
dc.date.issued 2015-11
dc.identifier.issn 0141-3910
dc.identifier.uri http://hdl.handle.net/10251/79147
dc.description.abstract The processing and characterization of biodegradable nanocomposites based on poly(ester-urethane) reinforced with different amounts (0.5, 1 and 3 wt %) of nanosized hydroxyapatite (nHA) are reported. The selected poly(ester-urethane) was synthesized starting from a tri-block copolymer based on poly(epsilon-caprolactone) (PCL) and poly(L-lactic acid) (PLLA). The nanocomposites were prepared by extrusion and by press molding. Several techniques were applied to investigate the properties of the nanocomposites. Electron microscopy revealed that the poly(ester-urethane) matrix is able to phase separate and that the addition of well-dispersed nanofillers modifies the dimension of the segregated phase. The thermal stability of the PU matrix, regulated by the PLLA block, decreased when low contents of nHA (0.5 and 1 wt %) were added, even if the thermal stability of the PCL-block was increased for each nHA amount. The good mechanical response of the nanocomposites confirmed the absence of agglomerates in the dispersion of the nanofillers in the polymeric matrix. The nHA presence also increased the surface hydrophilicity. Furthermore, rheology measurements, mechanical and thermal tests demonstrated the different behavior induced by the addition of nHA in different amounts. In fact, nHA acts as plasticizer at low concentrations (0.5, 1 wt %) and as reinforcement at a higher nHA amount (3 wt %). In vitro degradation tests were performed using a phosphate buffer solution. The results reported here are relevant for the development of nanocomposites based on a biodegradable and biocompatible polymeric matrix reinforced with small amounts of biocompatible nanofillers for different applications, especially in the biomedical field. (C) 2015 Elsevier Ltd. All rights reserved. es_ES
dc.description.sponsorship We are indebted to the Spanish Ministry of Science and Innovation (MICINN) for their economic support of this research (MAT2013-48059-C2-1-R and MAT2014-55778-REDT) as well as the Regional Government of Madrid (S2013/MIT-2862). LP acknowledges also, the support of a JAEDoc grant from CSIC cofinanced by FSE. We thank the technical support of Prof. Juan Lopez Martinez from Universitat Politecnica de Valencia (Spain) for his assistance with water contact angle measurements, as well as Marco Rallini and Franco Dominici from the STM group of the University of Perugia for FE-SEM photographs and microextruder blending, respectively. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation Spanish Ministry of Science and Innovation (MICINN) MAT2013-48059-C2-1-R MAT2014-55778-REDT es_ES
dc.relation Regional Government of Madrid S2013/MIT-2862 es_ES
dc.relation JAEDoc grant from CSIC - FSE es_ES
dc.relation.ispartof Polymer Degradation and Stability es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Mechanical properties es_ES
dc.subject Phase morphology es_ES
dc.subject Nanocomposite es_ES
dc.subject Poly(lactide) es_ES
dc.subject Biodegradable es_ES
dc.subject Poly(ester-urethane) es_ES
dc.subject.classification CIENCIA DE LOS MATERIALES E INGENIERIA METALURGICA es_ES
dc.title Biodegradable nanocomposites based on poly(ester-urethane) and nanosized hydroxyapatite: Plastificant and reinforcement effects es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.polymdegradstab.2015.09.002
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Tecnología de Materiales - Institut de Tecnologia de Materials es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials es_ES
dc.description.bibliographicCitation Navarro-Baena, I.; Arrieta, MP.; Sonseca Olalla, A.; Torre, L.; López, D.; Giménez Torres, E.; Kenny, JM.... (2015). Biodegradable nanocomposites based on poly(ester-urethane) and nanosized hydroxyapatite: Plastificant and reinforcement effects. Polymer Degradation and Stability. 121:171-179. doi:10.1016/j.polymdegradstab.2015.09.002 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi. org/10.1016/j.polymdegradstab.2015.09.002 es_ES
dc.description.upvformatpinicio 171 es_ES
dc.description.upvformatpfin 179 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 121 es_ES
dc.relation.senia 306876 es_ES
dc.identifier.eissn 1873-2321


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