INVESTIGADORES
GARCIA Maria Alejandra
artículos
Título:
Composite bi-layers and laminated films based on gelatin and chitosan
Autor/es:
RIVERO, S.; GARCIA, M.A.; PINOTTI, A.
Revista:
JOURNAL OF FOOD ENGINEERING
Editorial:
Elsevier
Referencias:
Año: 2009 vol. 90 p. 531 - 539
ISSN:
0260-8774
Resumen:
The aims of this work were: to develop composite, bi-layer and laminated biodegradable films based on
gelatin and chitosan, to determine film barrier and mechanical properties and to characterize their microstructure.
Gelatin and chitosan concentrations used were 7.5% and 1% (w/w), respectively. Glycerol (0.75%) was
added as plasticizer.
Physicochemical properties such as moisture content, transparency and color were analyzed. Composite
and bi-layer systems showed a compact structure indicating a good compatibility between components.
Water vapor permeability (WVP) was independent of film thickness up to 120 lm for gelatin films and
60 lm for chitosan ones. Both, bi-layer and laminated systems resulted effective alternatives to reduce
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
60 lm for chitosan ones. Both, bi-layer and laminated systems resulted effective alternatives to reduce
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
60 lm for chitosan ones. Both, bi-layer and laminated systems resulted effective alternatives to reduce
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
60 lm for chitosan ones. Both, bi-layer and laminated systems resulted effective alternatives to reduce
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
60 lm for chitosan ones. Both, bi-layer and laminated systems resulted effective alternatives to reduce
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
60 lm for chitosan ones. Both, bi-layer and laminated systems resulted effective alternatives to reduce
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
lm for gelatin films and
60 lm for chitosan ones. Both, bi-layer and laminated systems resulted effective alternatives to reduce
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).
lm for chitosan ones. Both, bi-layer and laminated systems resulted effective alternatives to reduce
WVP of composite films (at least 42.5%). Bi-layer systems showed better mechanical properties than laminated
ones. The resistance at break increased from 54.3 for composite to 77.2 MPa for bi-layer films,
whereas elongation at break values of both composite and bi-layer films were similar (2.25.7%).