Datum
2023-09-29Schlagwort
540 Chemie 660 Chemische Verfahrenstechnik, Technische Chemie ChitosanRheologieReisstärkeThermoplastPhysikalisch-chemische EigenschaftMetadata
Zur Langanzeige
Aufsatz
Characterization of films and film-forming solutions of chitosan/thermoplastic rice starch associations: Role of starch oxidation and plasticizer type in the molecular interactions
Zusammenfassung
Polysaccharide films are alternative sources to replace fossil-based compounds. This study aimed to use rice starch modified by gelatinization and oxidation processes. Different properties were observed after blending it with chitosan and polyols, as evaluated on the film-forming solutions by rheology. The interaction between chitosan and oxidized starch appeared higher, as the plasticizers exhibited a low effect on the rheological behavior. Polyols played an essential role in chitosan/gelatinized associations, driven by the number of OH groups. Films were evaluated by thermogravimetry (TGA), differential scanning calorimetry (DSC), water vapor permeability (WVP), water solubility, and tensile tests. The effect of the plasticizer type on chitosan/gelatinized starch was related to an increase in the temperature of the endothermic peak observed by DSC, confirming the role of hydroxyl groups of polyols in the polymer–polymer chain associations. The WVP and solubility decreased with starch oxidation due to increased chitosan–starch interactions. The decrease in tensile strength with adding polyols was correlated to reduced direct interactions between chitosan and starch chains. A drop of about 77% in elongation at break was observed in chitosan/oxidized starch film. On the other hand, elongation at break increased by around 14% in films with sorbitol (SO).
Zitierform
In: Polymer Engineering & Science Volume 63 / Issue 12 (2023-09-29) , S. 4127-4139 ; eissn:1548-2634Förderhinweis
Gefördert im Rahmen des Projekts DEALZitieren
@article{doi:10.17170/kobra-202312209251,
author={Horn, Marilia Marta and Martins, Virginia da Conceição Amaro and Plepis, Ana Maria de Guzzi},
title={Characterization of films and film-forming solutions of chitosan/thermoplastic rice starch associations: Role of starch oxidation and plasticizer type in the molecular interactions},
journal={Polymer Engineering & Science},
year={2023}
}
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2024-02-01T17:34:31Z 2024-02-01T17:34:31Z 2023-09-29 doi:10.17170/kobra-202312209251 http://hdl.handle.net/123456789/15426 Gefördert im Rahmen des Projekts DEAL eng Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ chitosan rheology rice starch thermoplastic 540 660 Characterization of films and film-forming solutions of chitosan/thermoplastic rice starch associations: Role of starch oxidation and plasticizer type in the molecular interactions Aufsatz Polysaccharide films are alternative sources to replace fossil-based compounds. This study aimed to use rice starch modified by gelatinization and oxidation processes. Different properties were observed after blending it with chitosan and polyols, as evaluated on the film-forming solutions by rheology. The interaction between chitosan and oxidized starch appeared higher, as the plasticizers exhibited a low effect on the rheological behavior. Polyols played an essential role in chitosan/gelatinized associations, driven by the number of OH groups. Films were evaluated by thermogravimetry (TGA), differential scanning calorimetry (DSC), water vapor permeability (WVP), water solubility, and tensile tests. The effect of the plasticizer type on chitosan/gelatinized starch was related to an increase in the temperature of the endothermic peak observed by DSC, confirming the role of hydroxyl groups of polyols in the polymer–polymer chain associations. The WVP and solubility decreased with starch oxidation due to increased chitosan–starch interactions. The decrease in tensile strength with adding polyols was correlated to reduced direct interactions between chitosan and starch chains. A drop of about 77% in elongation at break was observed in chitosan/oxidized starch film. On the other hand, elongation at break increased by around 14% in films with sorbitol (SO). open access Horn, Marilia Marta Martins, Virginia da Conceição Amaro Plepis, Ana Maria de Guzzi doi:10.1002/pen.26513 Grant Number: 140362/2008-8 ; Grant Number: Finance Code 001 Chitosan Rheologie Reisstärke Thermoplast Physikalisch-chemische Eigenschaft publishedVersion eissn:1548-2634 Issue 12 Polymer Engineering & Science 4127-4139 Volume 63 false
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