Strategies to improve the mechanical properties of starch-based materials: plasticization and natural fibers reinforcement

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dc.contributor.authorLopez-gil, A.
dc.contributor.authorRodriguez-perez, M.a. [UNESP]
dc.contributor.authorDe Saja, J.a.
dc.contributor.institutionUniversitat Politècnica de Catalunya
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Valladolid
dc.date.accessioned2021-07-14T10:25:25Z
dc.date.available2021-07-14T10:25:25Z
dc.date.issued2014
dc.description.abstractBiodegradable polymers are starting to be introduced as raw materials in the food-packaging market. Nevertheless, their price is very high. Starch, a fully biodegradable and bioderived polymer is a very interesting alternative due to its very low price. However, the use of starch as the polymer matrix for the production of rigid food packaging, such as trays, is limited due to its poor mechanical properties, high hidrophilicity and high density. This work presents two strategies to overcome the poor mechanical properties of starch. First, the plasticization of starch with several amounts of glycerol to produce thermoplastic starch (TPS) and second, the production of biocomposites by reinforcing TPS with promising fibers, such as barley straw and grape waste. The mechanical properties obtained are compared with the values predicted by models used in the field of composites; law of mixtures, Kerner-Nielsen and Halpin-Tsai. To evaluate if the materials developed are suitable for the production of food-packaging trays, the TPS-based materials with better mechanical properties were compared with commercial grades of oil-based polymers, polypropylene (PP) and polyethylene-terphthalate (PET), and a biodegradable polymer, polylactic acid (PLA).en
dc.description.affiliationUniversitat Politècnica de Catalunya, M. Ardanuy Department of Textile and Paper Engineering
dc.description.affiliationUniversidade Estadual Paulista, F.S. Bellucci Department of Physics, Chemistry and Biology
dc.description.affiliationUniversity of Valladolid, Department of Condensed Matter Physics
dc.description.affiliationUnespUniversidade Estadual Paulista, F.S. Bellucci Department of Physics, Chemistry and Biology
dc.format.extent36-42
dc.identifierhttp://dx.doi.org/10.4322/polimeros.2014.053
dc.identifier.citationPolímeros. São Carlos, SP, Brazil: Associação Brasileira de Polímeros, v. 24, n. spe, p. 36-42, 2014.
dc.identifier.doi10.4322/polimeros.2014.053
dc.identifier.fileS0104-14282014000700008.pdf
dc.identifier.issn0104-1428
dc.identifier.issn1678-5169
dc.identifier.scieloS0104-14282014000700008
dc.identifier.urihttp://hdl.handle.net/11449/211505
dc.language.isoeng
dc.publisherAssociação Brasileira de Polímeros
dc.relation.ispartofPolímeros
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectBiodegradableen
dc.subjectstarchen
dc.subjectthermoplastic starchen
dc.subjectbiocompositesen
dc.subjectfood packagingen
dc.subjectnatural fibersen
dc.subjectbarleyen
dc.subjectgrapeen
dc.titleStrategies to improve the mechanical properties of starch-based materials: plasticization and natural fibers reinforcementen
dc.typeArtigo

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