INVESTIGADORES
ZARITZKY Noemi Elisabet
congresos y reuniones científicas
Título:
Development and characterization of chemically modified corn starch films
Autor/es:
OLIVIA V. LÓPEZ; MARÍA A. GARCÍA NOEMÍ E. ZARITZKY.
Lugar:
Santiago de Chile
Reunión:
Congreso; XXV Interamerican Congress of Chemical Engineering; 2011
Institución organizadora:
Interamerican Confederation of Chemical Engineering
Resumen:
Biodegradable films from natural polymers are seems
to be an alternative to conventional synthetic plastic materials. Native starch
has received considerable attention because it is an appropriate matrix-forming
material and is also the most commonly used agricultural commodity, relatively
inexpensive with regard to other biopolymers . Unfortunately, this polymer has
a hydrophilic nature which makes the obtained materials sensitive to the
environmental humidity. In order to overcome this limitation, modified starches
could be used to obtain biodegradable films. The aim of this work was to
develop biodegradable films from acetylated corn starch plasticized with
glycerol. The obtained materials were characterized by analyzing their
microstructure, determining their water vapor permeability and studying their
mechanical properties and thermo-mechanical behavior. Besides, the heat sealing
capacity of the films was determined in order to use them to develop food
packages.Results
showed that acetylated corn starch is a viable alternative to obtain resistant but
ductile films plasticized with 30% w/w glycerol, with adequate heat sealing
properties allowing the development of biodegradable packages.