CIDCA   05380
CENTRO DE INVESTIGACION Y DESARROLLO EN CRIOTECNOLOGIA DE ALIMENTOS
Unidad Ejecutora - UE
artículos
Título:
CROSSLINKING CAPACITY OF TANNIC ACID IN PLASTICIZED CHITOSAN FILMS
Autor/es:
RIVERO, S.; GARCIA. M.A; PINOTTI, A.
Revista:
CARBOHYDRATE POLYMERS
Editorial:
Elsevier
Referencias:
Lugar: Holanda; Año: 2010
ISSN:
0144-8617
Resumen:
Plasticized and unplasticized chitosan films with tannic acid addition were developed. The crosslinking
capacity of tannic acid was studied by evaluating both the structural modification produced on chitosan
films and its effect on physicochemical, barrier and mechanical properties. Likewise the changes of these
properties during the storage were analyzed; formulations containing tannic acid increased 29% tensile
strength whereas decreased 24% water vapor permeability. Film solubility decreased at 100 ◦C, confirming
that exposure at high temperatures facilitates the crosslinking process. The presence of tannic acid
and glycerol simultaneously showed a synergic effect on the studied properties, all of which presented
intermediate behavior in relation to those determined with the addition of either acid or plasticizer. The
effect of the storage was also relevant since the films evidenced their tendency to a more stable structure
due to the reorganization toward an anhydrous conformation, as was demonstrated by X-ray diffraction
and FTIR analysis.
and FTIR analysis.
that exposure at high temperatures facilitates the crosslinking process. The presence of tannic acid
and glycerol simultaneously showed a synergic effect on the studied properties, all of which presented
intermediate behavior in relation to those determined with the addition of either acid or plasticizer. The
effect of the storage was also relevant since the films evidenced their tendency to a more stable structure
due to the reorganization toward an anhydrous conformation, as was demonstrated by X-ray diffraction
and FTIR analysis.
and FTIR analysis.
◦C, confirming
that exposure at high temperatures facilitates the crosslinking process. The presence of tannic acid
and glycerol simultaneously showed a synergic effect on the studied properties, all of which presented
intermediate behavior in relation to those determined with the addition of either acid or plasticizer. The
effect of the storage was also relevant since the films evidenced their tendency to a more stable structure
due to the reorganization toward an anhydrous conformation, as was demonstrated by X-ray diffraction
and FTIR analysis.
and FTIR analysis.
X-ray diffraction
and FTIR analysis.