title: Effect of nanocellulose as a filler on biodegradable thermoplastic starch films from tuber, cereal and legume.
abstract: Starches from different vegetal sources (tuber, cereal and legume) were plasticized with an invariant glycerol content and reinforced with cellulose nanocrystals by solution casting method. The influence of both, starch nature and filler amount, in the crystallinity and the extension of plasticization have been analyzed by X-ray diffraction. Thermoplastic starches (TPS) morphologies were obtained by scanning electron microscopy. Mechanical properties and thermal stability were analyzed by dynamomechanical and thermogravimetric analysis. Water absorption evolution was studied as well. A major extension in plasticization (high amylopectin starches) led to matrices with large starch-rich domains, a good thermal stability and resistance to water absorption but low stiffness. The incorporation of cellulose nanoparticles favoured plasticization and increased the rigidity in TPS films, as well as the thermal stability and moisture resistance. The aim of this work was to obtain bio-based thermoplastic starch films for replacing petroleum-derived ones in packaging industry, especially for short-life applications.
authors.affiliation: Grupo de Polímeros, Departamento de Física, Universidade da Coruña (UDC), Escuela Universitaria Politécnica, Campus de Ferrol, Avda. 19 de Febrero s/n, 15405 Ferrol, Spain. Electronic address: belen.montero@udc.es.
authors.forename: Belén
authors.initials: B
authors.lastname: Montero
authors.affiliation: Grupo de Polímeros, Departamento de Física, Universidade da Coruña (UDC), Escuela Universitaria Politécnica, Campus de Ferrol, Avda. 19 de Febrero s/n, 15405 Ferrol, Spain.
authors.forename: Maite
authors.initials: M
authors.lastname: Rico
authors.affiliation: Centro de Investigación de Polímeros Avanzados (CIPA), Edificio Laboratorio CIPA, Av. Collao 1202, Concepción, Chile.
authors.forename: Saddys
authors.initials: S
authors.lastname: Rodríguez-Llamazares
authors.affiliation: Grupo de Polímeros, Departamento de Física, Universidade da Coruña (UDC), Escuela Universitaria Politécnica, Campus de Ferrol, Avda. 19 de Febrero s/n, 15405 Ferrol, Spain.
authors.forename: Luis
authors.initials: L
authors.lastname: Barral
authors.affiliation: Grupo de Polímeros, Departamento de Física, Universidade da Coruña (UDC), Escuela Universitaria Politécnica, Campus de Ferrol, Avda. 19 de Febrero s/n, 15405 Ferrol, Spain.
authors.forename: Rebeca
authors.initials: R
authors.lastname: Bouza
mesh_terms: D002482:Cellulose / Q000737:chemistry*; D002523:Edible Grain; D007887:Fabaceae; D053758:Nanoparticles / Q000737:chemistry*; D018532:Pisum sativum; D035281:Plant Tubers; D010969:Plastics / Q000737:chemistry*; D011198:Solanum tuberosum; D013213:Starch / Q000737:chemistry*; D003313:Zea mays
chemical_list: D010969:Plastics; D002482:Cellulose; D013213:Starch
keywords: Bio-nanocomposites; Cellulose nanoparticles; Solvent casting; Starch nature; Thermoplastic starch