Characterization and enzymatic degradation study of poly(e-caprolactone)-based biocomposites from almond agricultural by-products
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Título: | Characterization and enzymatic degradation study of poly(e-caprolactone)-based biocomposites from almond agricultural by-products |
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Autor/es: | Valdés, Arantzazu | Fenollar, Octavio | Beltrán Sanahuja, Ana | Balart, Rafael | Fortunati, Elena | Kenny, José María | Garrigós, María del Carmen |
Grupo/s de investigación o GITE: | Análisis de Polímeros y Nanomateriales |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología |
Palabras clave: | Agricultural by-products | Almond skin | Poly(ε-caprolactone) | Reinforcement | Enzymatic degradation |
Área/s de conocimiento: | Química Analítica |
Fecha de publicación: | 2-mar-2016 |
Editor: | Elsevier |
Cita bibliográfica: | Polymer Degradation and Stability. 2016, 132: 181-190. doi:10.1016/j.polymdegradstab.2016.02.023 |
Resumen: | Reinforced poly(ε-caprolactone) (PCL)/almond skin (AS) biocomposites were prepared by extrusion and injection moulding at different AS contents (0, 10, 20, 30 wt%) in order to revalorize this agricultural residue. AS particles were characterized by field emission scanning electron microscopy (FESEM), attenuated total reflectance infrared spectroscopy (ATR-FTIR) and thermogravimetric analysis (TGA). Hemicelluloses were the first compound thermally degraded (263 ± 2 ºC) followed by cellulose (330 ± 5 ºC) and lignin (401 ± 3 ºC) with a remaining residue of 20 % which was associated to the fibre content present in AS. Mechanical, morphological, thermal, and water absorption properties; and enzymatic degradation using Pseudomonas lipase were evaluated for the obtained biocomposites. A significant improvement in Young´s modulus with a gain of 73 % at 30 wt% AS loading was obtained compared to neat PCL. An increase in Shore D hardness and decrease in elongation at break and impact energy were also observed with increasing AS content caused by the reinforcement effect. Lower DSC thermal enthalpies and higher crystallinity were obtained for the biocomposites. Some decrease in thermal stability and higher water absorption values were also found with AS addition. Finally, the presence of AS retarded the enzymatic degradation of PCL, showing neat PCL higher weight loss after 25 days of study followed by PCL with 10 wt% AS. |
Patrocinador/es: | Authors would like to thank “Almendras Llopis S.A” for kindly providing the almond skin by-products as well as to Spanish Ministry of Economy and Competitiveness for financial support (MAT-2015-59242-C2-2-R). A. Valdés acknowledges Conselleria de Educación (Spain) for ACIF/2010/172 Predoctoral Research Training Grant. |
URI: | http://hdl.handle.net/10045/53479 |
ISSN: | 0141-3910 (Print) | 1873-2321 (Online) |
DOI: | 10.1016/j.polymdegradstab.2016.02.023 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2016 Published by Elsevier Ltd. |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.polymdegradstab.2016.02.023 |
Aparece en las colecciones: | INV - NANOBIOPOL - Artículos de Revistas INV - AAQCN - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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2016_Valdes_etal_PolymDegradStab_accepted.pdf | Accepted Manuscript (acceso abierto) | 7,66 MB | Adobe PDF | Abrir Vista previa |
2016_Valdes_etal_PolyDegStab_final.pdf | Versión final (acceso restringido) | 1,86 MB | Adobe PDF | Abrir Solicitar una copia |
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