Influence of extrusion process conditions on starch film morphology

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 s...

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Autores principales: González-Seligra, P., Guz, L., Ochoa-Yepes, O., Goyanes, S., Famá, L.
Formato: JOUR
Materias:
Extrusion process conditions
Morphology
Physicochemical properties
Screw speed
Starch
Dispersions
Glycerol
Screws
Degradation process
Extrusion process
Food packaging
Physicochemical property
Strain at break
Temperature profiles
Water vapor permeability
Extrusion
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00236438_v84_n_p520_GonzalezSeligra
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00236438_v84_n_p520_GonzalezSeligra
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spelling todo:paper_00236438_v84_n_p520_GonzalezSeligra2023-10-03T14:34:24Z Influence of extrusion process conditions on starch film morphology González-Seligra, P. Guz, L. Ochoa-Yepes, O. Goyanes, S. Famá, L. Extrusion process conditions Morphology Physicochemical properties Screw speed Starch Dispersions Glycerol Morphology Screws Starch Degradation process Extrusion process Food packaging Physicochemical property Screw speed Strain at break Temperature profiles Water vapor permeability Extrusion 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. © 2017 Fil:Goyanes, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Famá, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00236438_v84_n_p520_GonzalezSeligra
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Extrusion process conditions
Morphology
Physicochemical properties
Screw speed
Starch
Dispersions
Glycerol
Morphology
Screws
Starch
Degradation process
Extrusion process
Food packaging
Physicochemical property
Screw speed
Strain at break
Temperature profiles
Water vapor permeability
Extrusion
spellingShingle Extrusion process conditions
Morphology
Physicochemical properties
Screw speed
Starch
Dispersions
Glycerol
Morphology
Screws
Starch
Degradation process
Extrusion process
Food packaging
Physicochemical property
Screw speed
Strain at break
Temperature profiles
Water vapor permeability
Extrusion
González-Seligra, P.
Guz, L.
Ochoa-Yepes, O.
Goyanes, S.
Famá, L.
Influence of extrusion process conditions on starch film morphology
topic_facet Extrusion process conditions
Morphology
Physicochemical properties
Screw speed
Starch
Dispersions
Glycerol
Morphology
Screws
Starch
Degradation process
Extrusion process
Food packaging
Physicochemical property
Screw speed
Strain at break
Temperature profiles
Water vapor permeability
Extrusion
description 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. © 2017
format JOUR
author González-Seligra, P.
Guz, L.
Ochoa-Yepes, O.
Goyanes, S.
Famá, L.
author_facet González-Seligra, P.
Guz, L.
Ochoa-Yepes, O.
Goyanes, S.
Famá, L.
author_sort González-Seligra, P.
title Influence of extrusion process conditions on starch film morphology
title_short Influence of extrusion process conditions on starch film morphology
title_full Influence of extrusion process conditions on starch film morphology
title_fullStr Influence of extrusion process conditions on starch film morphology
title_full_unstemmed Influence of extrusion process conditions on starch film morphology
title_sort influence of extrusion process conditions on starch film morphology
url http://hdl.handle.net/20.500.12110/paper_00236438_v84_n_p520_GonzalezSeligra
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AT guzl influenceofextrusionprocessconditionsonstarchfilmmorphology
AT ochoayepeso influenceofextrusionprocessconditionsonstarchfilmmorphology
AT goyaness influenceofextrusionprocessconditionsonstarchfilmmorphology
AT famal influenceofextrusionprocessconditionsonstarchfilmmorphology
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