Crystalline morphology of thermoplastic starch/talc nanocomposites induced by thermal processing

A structural study about the changes induced by plasticization of native corn starch was carried out in this work. The influence of talc nanoparticles presence during starch thermal processing was also evaluated. Macroscopic observation of the granules appearance evolution during melt-mixing and the...

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Detalles Bibliográficos
Autores principales: Castillo, Luciana A., López, Olivia Valeria, García, María Alejandra, Barbosa, Silvia E., Villar, Marcelo A.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Exactas
Materials science
Native corn starch
Talc nanoparticles
Thermal processing
Polymorphic transformations
Structural changes
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/121785
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-121785
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Materials science
Native corn starch
Talc nanoparticles
Thermal processing
Polymorphic transformations
Structural changes
spellingShingle Ciencias Exactas
Materials science
Native corn starch
Talc nanoparticles
Thermal processing
Polymorphic transformations
Structural changes
Castillo, Luciana A.
López, Olivia Valeria
García, María Alejandra
Barbosa, Silvia E.
Villar, Marcelo A.
Crystalline morphology of thermoplastic starch/talc nanocomposites induced by thermal processing
topic_facet Ciencias Exactas
Materials science
Native corn starch
Talc nanoparticles
Thermal processing
Polymorphic transformations
Structural changes
description A structural study about the changes induced by plasticization of native corn starch was carried out in this work. The influence of talc nanoparticles presence during starch thermal processing was also evaluated. Macroscopic observation of the granules appearance evolution during melt-mixing and thermo-compression was supported by a theoretical description related to these processing methods. Melt-mixing induced a polymorphic transformation from A- to V<sub>h</sub>-type and a reduction in the degree of crystallinity. Homogenous appearance of the plasticized starch was in accordance to the disruption of granules integrity, evidenced by SEM. This observation agreed to the distinctive XRD pattern of plasticized starch from unprocessed granules. Talc incorporation did not require the adjustment of processing parameters in order to obtain a homogenous thermoplastic material, with an adequate particles distribution within the matrix. Regardless talc presence, plasticized starch presented a V<sub>h</sub>-type crystalline structure. Thermo-compression led to particles alignment promoted by talc laminar morphology.
format Articulo
Articulo
author Castillo, Luciana A.
López, Olivia Valeria
García, María Alejandra
Barbosa, Silvia E.
Villar, Marcelo A.
author_facet Castillo, Luciana A.
López, Olivia Valeria
García, María Alejandra
Barbosa, Silvia E.
Villar, Marcelo A.
author_sort Castillo, Luciana A.
title Crystalline morphology of thermoplastic starch/talc nanocomposites induced by thermal processing
title_short Crystalline morphology of thermoplastic starch/talc nanocomposites induced by thermal processing
title_full Crystalline morphology of thermoplastic starch/talc nanocomposites induced by thermal processing
title_fullStr Crystalline morphology of thermoplastic starch/talc nanocomposites induced by thermal processing
title_full_unstemmed Crystalline morphology of thermoplastic starch/talc nanocomposites induced by thermal processing
title_sort crystalline morphology of thermoplastic starch/talc nanocomposites induced by thermal processing
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/121785
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AT garciamariaalejandra crystallinemorphologyofthermoplasticstarchtalcnanocompositesinducedbythermalprocessing
AT barbosasilviae crystallinemorphologyofthermoplasticstarchtalcnanocompositesinducedbythermalprocessing
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bdutipo_str Repositorios
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