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Artículo

Effect of the Incorporation of Rich-Amylopectin Starch Nano/Micro Particles on the Physicochemical Properties of Starch-Based Nanocomposites Developed by Flat-Die Extrusion

González Seligra, Paula FabianaIcon ; Goyanes, Silvia NairIcon ; Fama, Lucia MercedesIcon
Fecha de publicación: 08/2021
Editorial: Wiley VCH Verlag
Revista: Starch/starke
ISSN: 0038-9056
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Recubrimientos y Películas

Resumen

Nanotechnology has been crucial in the development of environmentally friendly and naturally based materials for food packaging. In this work, an inexpensive and scalable way to develop amylopectin-enriched nanocomposites with nano/micro particles of starch is investigated. Cassava starch nanocomposites with rich-amylopectin starch nano/micro particles (SAP) are prepared by flat-die extrusion. SAP, obtained by applying shear stresses to an aqueous solution of native cassava starch using grinding, consists of (10.8 ± 0.9)% of nanofiller (< 200 nm) and (88 ± 1)% of micro-size particles (2-10 µm). After processing, great compatibility between SAP and the matrix is achieved. Nanocomposites with 15 wt.% of SAP show increases in Young's modulus (73%), tensile stress (30%), and tensile toughness (63%), and a decrease in water vapor permeability (34%) compared to the films without SAP (TPS). The use of 30 wt.% of SAP leads to a slight increase in crystallinity without significant changes in the overall properties, as a consequence of the combination of the effects produced by the presence of nanofiller and the enrichment of the matrix in amylopectin. This investigation provides a methodology for developing amylopectin-enriched starch nanocomposites with high compatibility between the nanofiller and the matrix as an attractive alternative for conventional starch-based packaging.
Palabras clave: FLAT-DIE EXTRUSION , PHYSICOCHEMICAL PROPERTIES , STARCH NANO/MICRO PARTICLES , STARCH-BASED NANOCOMPOSITES
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/181837
URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/star.202100080
DOI: https://doi.org/10.1002/star.202100080
Colecciones
Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
González Seligra, Paula Fabiana; Goyanes, Silvia Nair; Fama, Lucia Mercedes; Effect of the Incorporation of Rich-Amylopectin Starch Nano/Micro Particles on the Physicochemical Properties of Starch-Based Nanocomposites Developed by Flat-Die Extrusion; Wiley VCH Verlag; Starch/starke; 74; 1-2; 8-2021; 1-9
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