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Artículo

Influence of extrusion process conditions on starch film morphology

González Seligra, Paula FabianaIcon ; Guz, Lucas MartínIcon ; Ochoa Yepes, Oswaldo JuanIcon ; Goyanes, Silvia NairIcon ; Fama, Lucia MercedesIcon
Fecha de publicación: 06/2017
Editorial: Elsevier Science
Revista: LWT - Food Science and Technology
ISSN: 0023-6438
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Astronomía

Resumen

The conditions of extrusion process for food packaging are determinant on their morphology and, as consequence, on their functionality. The effect of the screw speed of a starch-glycerol system extruded at the same temperature profile was evaluated. The process at 80 rpm led to a material with the starch completely gelatinized, while the systems fabricated at 40 rpm and 120 rpm presented broken starch grains. The morphology and density of the broken grains depended on the screw speed. The material at 120 rpm showed broken grains with smaller size and lower concentration than that observed in the system at 40 rpm. After pressing at 120 rpm, the film formed (TPS120) resulted similar than that at 80 rpm (TPS80), while the film at 40 rpm (TPS40) kept some broken grains. TGA of the material obtained at 40 rpm showed more than one degradation process of the glycerol due to the inhomogeneous glycerol dispersion. DRX revealed more cristallinity in TPS40, being TPS120 the most amorphous. TPS80 had the highest strain at break while the others the higher modulus and stress at break. Water vapor permeability of TPS80 and TPS120 showed similar results and lower than TPS40.
Palabras clave: Extrusion Process Conditions , Morphology , Physicochemical Properties , Screw Speed , Starch
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/64604
URL: http://www.sciencedirect.com/science/article/pii/S0023643817304310
DOI: http://dx.doi.org/10.1016/j.lwt.2017.06.027
Colecciones
Articulos(IFIBA)
Articulos de INST.DE FISICA DE BUENOS AIRES
Citación
González Seligra, Paula Fabiana; Guz, Lucas Martín; Ochoa Yepes, Oswaldo Juan; Goyanes, Silvia Nair; Fama, Lucia Mercedes; Influence of extrusion process conditions on starch film morphology; Elsevier Science; LWT - Food Science and Technology; 84; 6-2017; 520-528
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