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Properties and optimal manufacturing conditions of chicken feathers/poly(lactic acid) biocomposites Cañavate Ávila, Francisco Javier Aymerich Amorós, Jordi Garrido Soriano, Núria Colom Fajula, Xavier Macanás de Benito, Jorge Molins Duran, Gemma Álvarez del Castillo, María Dolores Carrillo Navarrete, Fernando Universitat Politècnica de Catalunya. Departament d'Enginyeria Química Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics Escola Superior d'Enginyeries Industrial, Aeroespacial i Audiovisual de Terrassa Universitat Politècnica de Catalunya. Institut d'Investigació Tèxtil i Cooperació Industrial de Terrassa Universitat Politècnica de Catalunya. POLQUITEX - Materials Polimérics i Química Téxtil Universitat Politècnica de Catalunya. SUMMLab - Sustainability Measurement and Modeling Lab Àrees temàtiques de la UPC::Enginyeria química::Química orgànica::Compostos orgànics Composites (Materials) Polylactic acid Feathers Keratin Tensile Strength Green composites Poly(lactic acid) Feather Keratin Biocomposite Tensile properties Materials compostos Àcid polilàctic Plomes Queratina Chicken feathers waste from poultry industry was incorporated in poly(lactic acid) matrix to obtain an environmental friendly biocomposite taking advantage of the unique properties of chicken feathers, such as low density, biodegradability and good thermal and acoustic properties, and of the biodegradability of the poly(lactic acid). The effect of manufacturing conditions on the final properties of the composite and on the matrix–fiber compatibility was studied. Optimal manufacturing conditions, in order to obtain the best mechanical results, were found at a temperature of 170–180¿ for a processing time of 5¿min and a speed of mixing of 50¿r/min. Young’s modulus was not very affected by the chicken feather’s content showing a maximal variation of less than 8%, indicating that is possible to include chicken feathers in a composite maintaining its stiffness. However, tensile strength and elongation decreased up to 58 and 12%, respectively, when chicken feather content was 25% because of the restraining effect of the fibers. Moreover, dimensional stability was negatively affected with the inclusion of chicken feathers. Infrared spectroscopy and scanning electron microscopy studies show that fiber–matrix interaction exists but it is weak Postprint (author's final draft) 2015-04-20 Article Cañavate, J., Aymerich, J., Garrido, N., Colom, X., Macanás, J., Molins, G., M.D. Alvarez, Carrillo, F. Properties and optimal manufacturing conditions of chicken feathers/poly(lactic acid) biocomposites. "Journal of composite materials", 2016, vol. 50, núm. 12, pp. 1671-1683. 0021-9983 https://hdl.handle.net/2117/83984 10.1177/0021998315595534 eng http://jcm.sagepub.com/content/50/12/1671 http://creativecommons.org/licenses/by-nc/3.0/es/ Open Access 13 p. application/pdf