flexible whey protein isolate biofilms - ips and poly (vinyl alcohol) - pva reinforced with silica nanoparticles for food packaging applications

摘要

The present invention relates to the production of flexible whey protein isolate biofilms - ips and polyvinyl alcohol? pva reinforced with silica nanoparticles, which are biodegradable with good mechanical (tensile), optical (transparency) and water vapor barrier properties, with great potential for application in flexible plastic food packaging. ips is an edible and biodegradable biopolymer, which is obtained as a by-product of the cheese industry. Despite their desirable transparency properties and good oxygen barrier, ips films are commonly brittle and brittle. The developed invention adds pva to ips films providing a reduction in brittleness and increased flexibility of ips films. In addition, the new product also features the addition of silica nanoparticles to ips / pva biofilms, providing greater mechanical strength and greater moisture barrier. The invention, therefore, not only solves the problems that prevent the application of ips films in packaging, but also the problem of accumulation of plastic solid waste indefinitely in the environment and the inappropriate disposal or disposal of whey from industries. of cheese.