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

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Lopez Gil, Alberto. Strategies to improve the mechanical properties of starch based materials, plasticization ....pdf (1,949Mb)
 
10.4322/polimeros.2014.054
 
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López Gil, Alberto
Rodríguez Pérez, Miguel Ángel
de Saja, José Antonio
Bellucci, Felipe Silva
Ardanuy Raso, MònicaMés informacióMés informacióMés informació
Document typeArticle
Defense date2014-07-14
Rights accessOpen Access
Attribution 3.0 Spain
This work is protected by the corresponding intellectual and industrial property rights. Except where otherwise noted, its contents are licensed under a Creative Commons license : Attribution 3.0 Spain
Abstract
Biodegradable 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)
CitationLópez, A. [et al.]. Strategies to improve the mechanical properties of starch-based materials: plasticization and natural fibers reinforcement. "Polímeros: Ciência e Tecnologia", 14 Juliol 2014, vol. 24, p. 36-42. 
URIhttp://hdl.handle.net/2117/24316
DOI10.4322/polimeros.2014.054
ISSN0104-1428
Publisher versionhttp://revistapolimeros.org.br/
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  • TECTEX - Grup de recerca en Tecnologia Tèxtil - Articles de revista [186]
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