Chitosan-gelatin composites and bi-layer films with potential antimicrobial activity

M. PEREDA; A.G. PONCE; N.E. MARCOVICH; R.A. RUSECKAITE; J. F. MARTUCCI

FOOD HYDROCOLLOIDS

ELSEVIER SCI LTD

Año: 2010

0268-005X

The aims of this work were to develop composite (Chi-Ge) and bi-layer (Chi/Ge) edible and biodegradable films based on gelatin and chitosan. physico-chemical properties such as water resistance, transparency and color were analyzed. Composite and bi-layer systems were uniform, homogeneous and thin; they showed a compact structure indicating a good compatibility between components, which could interact by strong hydrogen bonding, as was confirmed by FTIR. Water vapor permeability (WVP) was determined. Both, bi-layer and laminated systems resulted effective alternatives to reduce WVP of chitosan control film. The tensile strength of composite and bi-layer system did not differ significantly (P > 0.05), but elongation at break of composite films was 40% higher (P< 0.05) than that of bi-layer film. Antimicrobial activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. but elongation at break of composite films was 40% higher (P< 0.05) than that of bi-layer film. Antimicrobial activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. Both, bi-layer and laminated systems resulted effective alternatives to reduce WVP of chitosan control film. The tensile strength of composite and bi-layer system did not differ significantly (P > 0.05), but elongation at break of composite films was 40% higher (P< 0.05) than that of bi-layer film. Antimicrobial activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. but elongation at break of composite films was 40% higher (P< 0.05) than that of bi-layer film. Antimicrobial activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. and color were analyzed. Composite and bi-layer systems were uniform, homogeneous and thin; they showed a compact structure indicating a good compatibility between components, which could interact by strong hydrogen bonding, as was confirmed by FTIR. Water vapor permeability (WVP) was determined. Both, bi-layer and laminated systems resulted effective alternatives to reduce WVP of chitosan control film. The tensile strength of composite and bi-layer system did not differ significantly (P > 0.05), but elongation at break of composite films was 40% higher (P< 0.05) than that of bi-layer film. Antimicrobial activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. but elongation at break of composite films was 40% higher (P< 0.05) than that of bi-layer film. Antimicrobial activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. Both, bi-layer and laminated systems resulted effective alternatives to reduce WVP of chitosan control film. The tensile strength of composite and bi-layer system did not differ significantly (P > 0.05), but elongation at break of composite films was 40% higher (P< 0.05) than that of bi-layer film. Antimicrobial activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. but elongation at break of composite films was 40% higher (P< 0.05) than that of bi-layer film. Antimicrobial activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed. The results indicated that both E. coli and L. monocytogenes activity of the films was analyzed.