INVESTIGADORES
GARCIA Maria Alejandra
artículos
Título:
Electrically treated composite films based on chitosan and methylcellulose blends
Autor/es:
GARCIA, M.A.; PINOTTI, A.; MARTINO, M.N.; ZARITZKY, N.E.
Revista:
FOOD HYDROCOLLOIDS
Editorial:
Elsevier
Referencias:
Año: 2009 vol. 23 p. 722 - 728
ISSN:
0268-005X
Resumen:
Films obtained from chitosan (CH) and methylcellulose (MC) can reduce environmental problems
associated with synthetic packaging. The objective of the present work was to analyze the effect of an
electrical field applied during drying on microstructure and macroscopic properties of films obtained
with different mixtures of CH and MC.
SEM and X-ray diffraction indicated that CH electrically treated film exhibited a more ordered structure
and lower water vapor permeability (WVP) values than those of the control films. With regard to
mechanical properties of electrical treated samples, longitudinal probes presented higher elongation
values than those of transverse ones.
CH treated films showed higher Youngs modulus values than the control ones; in composite control
samples, Youngs modulus and tensile strength increased with CH concentration, leading to stronger
films. Electrical field treatment would be a good alternative to improve film flexibility and water vapor
barrier properties.