INVESTIGADORES
MARTUCCI josefa Fabiana
artículos
Título:
Tensile Properties, Barrier Properties and Biodegradation in Soil of Compression- Molded Gelatin-Dialdehyde
Autor/es:
J. F. MARTUCCI; R.A. RUSECKAITE
Revista:
JOURNAL OF APPLIED POLYMER SCIENCE
Editorial:
WILEY
Referencias:
Año: 2008
ISSN:
0021-8995
Resumen:
Glycerol (Gly) - plasticized gelatin (Ge) films crosslinked with dialdehyde
starch (DAS) as environmentally friendly crosslinking agent were successfully
produced by compression molding, demonstrating the capacity of gelatin of being
transformed into films by using thermoplastic processes. The effect of DAS content on
the color, light transmission, total soluble matter (TSM), water uptake (WU), water
vapour permeability (WVP), oxygen permeability (OP) as well as biodegradability
during soil burial was investigated. The addition of up to 10wt.%DAS (Ge-10DAS)
generated transparent films, with reduced TMS, WU, WVP and OP values but higher
extensivity than the uncrosslinked counterpart. Further incorporating DAS into
plasticized gelatin matrix conducted to phase separation with detrimental effect of
transparency and tensile properties. DAS-containing films degraded at slow rate than
the uncrosslinked counterpart, suggesting that biotic attack during soil burial is
restricted by covalent crosslinking points induced by DAS. Ge-10DAS films lost about
28% of their initial mass within the first eight days of exposure to degrading medium;
therefore the material can be classified as rapidly degradable.