Influência do pH e da irradiação em filmes biodegradáveis de proteínas do soro de leite
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2012-02-24
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Universidade Federal de Goiás
Resumo
The packaging has as main function to maintain the integrity of the product, protecting it
against mechanical damage, moisture loss and gain. Most packaging is manufactured from
non-biodegradable materials and non-renewable source promoting great environmental
impacts. Among the raw materials used in the development of biodegradable films found the
whey proteins. The biodegradables films do not present the same resistance presented for the
synthetic films, many treatments are being applied to biofilmes in the attempt to improve the
mechanical properties, amongst them the variation of pH and irradiation. In this way, aimed to
evaluate the effect of different pH values and doses of gamma radiation on the mechanical,
optical and barrier properties of whey proteins biodegradable films. The films were made by
casting and characterized with respect to thickness, color, opacity, water vapor permeability,
water solubility, scanning electron microscopy and mechanical properties. The different
treatments studied significantly influenced the properties of the films, except for the water
solubility. It is concluded that the different treatments can promote improvement in film
properties.
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SOARES, Dayana Silva Batista. Influence of ph and irradiation in whey proteins biodegradable films. 2012. 92 f. Dissertação (Mestrado em Ciencias Agrárias - Agronomia) - Universidade Federal de Goiás, Goiânia, 2012.