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Artículo

Soy protein – Poly (lactic acid) bilayer films as biodegradable material for active food packaging

González, AgustínIcon ; Alvarez Igarzabal, Cecilia InesIcon
Fecha de publicación: 12/2013
Editorial: Elsevier
Revista: Food Hydrocolloids
ISSN: 0268-005X
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Físico-Química, Ciencia de los Polímeros, Electroquímica

Resumen

The preparation and characterization of biodegradable bilayer films from isolated soy protein (SPI) and poly (lactic acid) (PLA) were carried out in this work. The films showed high transparency and strong adhesion between layers without adding an extra component, or without chemically modifying the film surfaces. The application of the PLA layer largely increased the mechanical properties of the films with respect to those of pure SPI films. Furthermore, the hydrophobic characteristics of the PLA layer improved film performance under conditions in which water was involved, markedly decreasing the amount of total soluble matter, the swelling index and the water vapor permeability. The biodegradation under soil burial conditions was evaluated measuring weight loss as a function of time, showing a twostep degradation and a faster degradation rate for the protein component compared to those of PLA layer.<br />The films prepared were evaluated as active packaging by incorporation of an antifungal and an antibacterial agent (natamycin and thymol, respectively) to the SPI layer, showing a marked growth inhibition of mold, yeast and two strains of bacteria by in-vitro microbiological assays.
Palabras clave: Soy Protein , Poly (Lactic Acid) , Bilayer Film , Active Packaging
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/9667
DOI: http://dx.doi.org/10.1016/j.foodhyd.2013.03.010
URL: http://www.sciencedirect.com/science/article/pii/S0268005X13000933
Colecciones
Articulos(IMBIV)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Citación
González, Agustín; Alvarez Igarzabal, Cecilia Ines; Soy protein – Poly (lactic acid) bilayer films as biodegradable material for active food packaging; Elsevier; Food Hydrocolloids; 33; 2; 12-2013; 289-296
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