Heat treatment of calcium alginate films obtained by ultrasonic atomizing: physicochemical characterization

Planar films of calcium alginate were obtained using an ultrasonic atomizing device. Sodium alginate solutions of 0.6% and 0.9% (w/v) were nebulized with calcium gluconolactate solutions (gelling agent) of 0, 1, 2 and 3% (w/v) at a flow rate of 0.3 mL min−1 for 20 min. After drying, thickness and me...

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Autores principales:	Soazo, Marina del Valle, Báez, Germán David, Barboza, Andrea, Busti, Pablo Andrés, Rubiolo, Amelia Catalina, Verdini, Roxana Andrea, Delorenzi, Néstor Jorge
Formato:	article artículo publishedVersion
Lenguaje:	Inglés
Publicado:	Elsevier 2019
Materias:	Calcium alginate films Ultrasonic atomizing Heat treatment Physicochemical characterization
Acceso en línea:	http://hdl.handle.net/2133/13886 http://hdl.handle.net/2133/13886
Aporte de:	Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR) de Universidad Nacional de Rosario

id	I15-R121-2133-13886
record_format	dspace
institution	Universidad Nacional de Rosario
institution_str	I-15
repository_str	R-121
collection	Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR)
language	Inglés
orig_language_str_mv	eng
topic	Calcium alginate films Ultrasonic atomizing Heat treatment Physicochemical characterization
spellingShingle	Calcium alginate films Ultrasonic atomizing Heat treatment Physicochemical characterization Soazo, Marina del Valle Báez, Germán David Barboza, Andrea Busti, Pablo Andrés Rubiolo, Amelia Catalina Verdini, Roxana Andrea Delorenzi, Néstor Jorge Heat treatment of calcium alginate films obtained by ultrasonic atomizing: physicochemical characterization
topic_facet	Calcium alginate films Ultrasonic atomizing Heat treatment Physicochemical characterization
description	Planar films of calcium alginate were obtained using an ultrasonic atomizing device. Sodium alginate solutions of 0.6% and 0.9% (w/v) were nebulized with calcium gluconolactate solutions (gelling agent) of 0, 1, 2 and 3% (w/v) at a flow rate of 0.3 mL min−1 for 20 min. After drying, thickness and mechanical properties were determined. In view of the results of mechanical properties, manageability and flexibility, calcium alginate films obtained using 0.9% sodium alginate and 2% calcium gluconolactate were selected as “optimum dry film” samples. These samples were cut into rectangular pieces and heated at 180 °C for 0, 4, 8, 12, 20 and 24 min. Thickness, mechanical and optical properties, differential scanning calorimetry (DSC) thermograms, Fourier transform infrared spectroscopy (FTIR) spectra, and scanning electron microscopy (SEM) micrographs were analyzed in order to characterize the physicochemical properties of heat-treated samples. The heat treatment produced thickness reduction, a yellow ochre color development and an increase in the brittleness of the films. DSC, FTIR and SEM studies suggested that heat treatment produced further dehydration of dry films and thermal dehydration–degradation of alginate macromolecules.
format	article artículo publishedVersion
author	Soazo, Marina del Valle Báez, Germán David Barboza, Andrea Busti, Pablo Andrés Rubiolo, Amelia Catalina Verdini, Roxana Andrea Delorenzi, Néstor Jorge
author_facet	Soazo, Marina del Valle Báez, Germán David Barboza, Andrea Busti, Pablo Andrés Rubiolo, Amelia Catalina Verdini, Roxana Andrea Delorenzi, Néstor Jorge
author_sort	Soazo, Marina del Valle
title	Heat treatment of calcium alginate films obtained by ultrasonic atomizing: physicochemical characterization
title_short	Heat treatment of calcium alginate films obtained by ultrasonic atomizing: physicochemical characterization
title_full	Heat treatment of calcium alginate films obtained by ultrasonic atomizing: physicochemical characterization
title_fullStr	Heat treatment of calcium alginate films obtained by ultrasonic atomizing: physicochemical characterization
title_full_unstemmed	Heat treatment of calcium alginate films obtained by ultrasonic atomizing: physicochemical characterization
title_sort	heat treatment of calcium alginate films obtained by ultrasonic atomizing: physicochemical characterization
publisher	Elsevier
publishDate	2019
url	http://hdl.handle.net/2133/13886 http://hdl.handle.net/2133/13886
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bdutipo_str	Repositorios
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Heat treatment of calcium alginate films obtained by ultrasonic atomizing: physicochemical characterization

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