Improvement of water barrier properties of soybean protein isolate films by poly(3-hydroxybutyrate) thin coating
- Salgado, Pablo Rodrigo
- D'amico, David Alberto
- Seoane, Irene Teresita
- Iglesias Montes, Magdalena Luz
- Mauri, Adriana Noemi
- Cyras, Viviana Paola
DOIAbstract
The aim of this work was to study the preparation of bilayer films formed by soy protein isolate (SPI) and polyhydroxybutyrate (PHB). This was done using the lowest possible concentration of PHB to improve the functionality of SPI films as food packaging or for agricultural uses, specially reducing their water vapor permeability (WVP). SPI films are environmentally friendly since they are biodegradable and come from renewable sources but they are brittle and have high water permeability. Even for the lowest concentration analyzed, PHB managed to form a homogeneous layer that successfully covered up the SPI film surface. All bilayers films showed a significant reduction of WVP of SPI films, and those with the highest PHB content showed the h...
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