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Characterisation of thermal and chemical properties of photo-oxidized reinforced Mater-Bi KE/natural fibres biocomposites degraded in soil

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Characterisation of thermal and chemical properties of photo-oxidized reinforced Mater-Bi KE/natural fibres biocomposites degraded in soil

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dc.contributor.advisor Strömberg,Emma es_ES
dc.contributor.advisor Gedde, Ulf es_ES
dc.contributor.author Moriana Torró, Rosana es_ES
dc.date.accessioned 2016-02-22T17:03:02Z
dc.date.available 2016-02-22T17:03:02Z
dc.date.created 2010
dc.date.issued 2016-02-22
dc.identifier.uri http://hdl.handle.net/10251/61089
dc.description.abstract Reinforced biocomposites of natural fibres (cotton and kenaf fibres) with a commercial biodegradable material (Mater-Bi KE03B1) were subjected to an accelerated soil burial test. A set of samples was previously photo-oxidized in order to evaluate the effects of solar radiation on the degradation in soil process of these biocomposites. Thermal and chemical measurements were performed to study the degradation in soil, photo-degradation and their synergetic effects on the biodegradable polymeric matrix and its reinforced biocomposites. Thermogravimetry Analysis (TGA) was used to investigate the thermal behavior of the samples during the proposed different experimental degradation tests. In addition, the kinetics of each sample was analyzed using three different mathematical models: Kissinger method was used for calculating the Ea whereas Criado and Coats-Redfern methods were applied to analyze the thermal degradation kinetic model of each thermal decomposition process. In addition, the effects that take place as a consequence of the degradation in soil and the photo-degradation of materials were studied by Fourier Transform Infrared Spectroscopy (FTIR). These studies were completed with morphological analysis by means of Scanning Electron Microscopy (SEM). Photo-oxidation induces an increase in the thermal stability and in the Ea related to the starch component of pure Mater-Bi KE together with an increase in the C-O-C band associated with the glycosidic bond of the starch component. Whereas, the effects of photo-oxidation on the reinforced biocomposites were related to the natural fibre used. When the polymeric matrix were submitted to soil burial test the starch was found to be the most susceptible polymeric matrix component in soil. However, the presence of natural fibres modified the degradation rate of both matrix components; the degradation rate of the synthetic component was enhanced, whereas the biodegradation of the starch was slowed down as a function of the soil exposure time. The photo-oxidation of the pure Mater-Bi KE, Mater-Bi KE/cotton and Mater-Bi KE/kenaf achieved to enhance the degradation rate of all materials, being the Mater-Bi KE/kenaf the affected in major extent by the synergetic effects of both photo-oxidation and soil burial test. es_ES
dc.format.extent 59 es_ES
dc.language Inglés es_ES
dc.publisher Universitat Politècnica de València es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Soil burial test es_ES
dc.subject SEM es_ES
dc.subject FTIR es_ES
dc.subject TGA es_ES
dc.subject Reinforced biocomposites es_ES
dc.subject Natural fibre es_ES
dc.subject.other Máster Universitario en Materiales y Sistemas Sensores para Tecnologías Medioambientales - Màster Universitari en Materials i Sistemes Sensors per a Tecnologies Mediambientals
dc.title Characterisation of thermal and chemical properties of photo-oxidized reinforced Mater-Bi KE/natural fibres biocomposites degraded in soil es_ES
dc.type Tesis de máster es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería del Diseño - Escola Tècnica Superior d'Enginyeria del Disseny es_ES
dc.description.bibliographicCitation Moriana Torró, R. (2010). Characterisation of thermal and chemical properties of photo-oxidized reinforced Mater-Bi KE/natural fibres biocomposites degraded in soil. Universitat Politècnica de València. http://hdl.handle.net/10251/61089 es_ES
dc.description.accrualMethod Archivo delegado es_ES


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