Artículos de revistas
Gelatin-based films containing hydrophobic plasticizers and saponin from Yucca schidigera as the surfactant
Fecha
2010Registro en:
FOOD RESEARCH INTERNATIONAL, v.43, n.6, p.1710-1718, 2010
0963-9969
10.1016/j.foodres.2010.05.013
Autor
ANDREUCCETTI, Caroline
CARVALHO, Rosemary A.
GROSSO, Carlos R. F.
Institución
Resumen
The aim of this study was to evaluate the incorporation of hydrophobic plasticizers (acetyltributyl citrate - ATB, tributyl citrate - TB and acetyltriethyl citrate - ATC) in a matrix of gelatin, using the saponin extracted from Yucca schidigera (yucca) as emulsifier, in the production of biodegradable emulsified films using the casting technique. High levels of hydrophobic plasticizers were incorporated, reaching up to 75% of plasticizer in relation to the protein (w/w) for ATB and TB, and up to 60% for ATC. The minimum values of water vapor permeability were 0.08, 0.07 and 0.06 g mm m(-2) h(-1) kPa(-1) for ATB, TB and ATC respectively, with no significant differences (p > 0.05). The water solubility of the films ranged from 21% to 59.5%. Although the WVP decreased, both scanning electron microscopy and laser scanning confocal microscopy indicated that the incorporation of the hydrophobic plasticizers did not occur homogeneously in the film matrix. (C) 2010 Elsevier Ltd. All rights reserved.