2014-07-292012-08-302012-02-24SOARES, 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.http://repositorio.bc.ufg.br/tede/handle/tde/2266The 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.application/pdfAcesso AbertopHradiação gamafilmes biodegradáveisproteínas do soro de leitepropriedades mecânicaspHgamma radiationbiodegradable filmswhey proteinsmechanical propertiesCNPQ::CIENCIAS AGRARIAS::CIENCIA E TECNOLOGIA DE ALIMENTOSDissertação