Water Susceptibility and Mechanical Properties of Thermoplastic Starch–Pectin Blends Reactively Extruded with Edible Citric Acid

Water Susceptibility and Mechanical Properties of Thermoplastic Starch–Pectin Blends Reactively Extruded with Edible Citric Acid

Pectin and starch are edible, non-toxic, biodegradable and obtained from renewable sources. Also, have the benefit to be easily cross-linked producing hydrogels. Reactive extrusion with edible citric acid and cross linking interactions was evaluated on extruded thermoplastic in natura and cationic s...

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Bibliographic Details
Published in:Materials research (São Carlos, São Paulo, Brazil) Vol. 19; no. 1; pp. 138 - 142
Main Authors: Da Róz, Alessandra Luzia, Veiga-Santos, Pricila, Ferreira, Adriane Medeiros, Antunes, Thaís Cristina Ribeiro, Leite, Fabio de Lima, Yamaji, Fabio Minoru, Carvalho, Antonio José Felix de
Format: Journal Article
Language:English
Published: ABM, ABC, ABPol 01-02-2016
Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
Subjects:
Bio-based products
Biodegradable packaging
Citric acid
Crosslinking
Edible
ENGINEERING, CHEMICAL
Extrusion
MATERIALS SCIENCE, MULTIDISCIPLINARY
Mechanical properties
METALLURGY & METALLURGICAL ENGINEERING
pectin
Polymer blends
Starch
Starches
Thermoplastic resins
Biodegradable packaging
Bio-based products
Extrusion
Starch
pectin
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Description
Summary:Pectin and starch are edible, non-toxic, biodegradable and obtained from renewable sources. Also, have the benefit to be easily cross-linked producing hydrogels. Reactive extrusion with edible citric acid and cross linking interactions was evaluated on extruded thermoplastic in natura and cationic starch-pectin blends. Materials water susceptibility and mechanical properties were characterised. Reactive extrusion decreased (up to 75% in natura starch) mechanical properties. Also have decreased (up to 32.4%) both starch polymers water absorption, indicating the possibility of increasing materials water barrier properties but had the opposite effect on the pectin-TPS material, probably related to a cationic-anionic cross linking, resulting in a hydrogel polymer. Reactive extrusion also have negatively affected mechanical properties of both starch polymers, however increased pectin-TPS blends stress and strain at rupture.
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ISSN:1516-1439
1980-5373
1980-5373
DOI:10.1590/1980-5373-MR-2015-0215