Produção de revestimento antimicrobiano com poli(farneseno-co-IBOMA) e AgNP biogênica para aplicação em embalagens celulósicas

Abstract

In the search for the development of sustainable technologies, this master’s thesis work supports two materials from green technologies, with the objective of contributing to the responsible production of antimicrobial packaging for food: Biogenic silver nanoparticles and polymer of poly(isobornila farnesene-co-methacrylate) - p(Far-co-IBOMA), obtained with monomers from renewable sources. Therefore, this work also investigates the possibility of using the Solution Blow Spraying method to produce paper coatings for application in active packaging, in order to obtain the necessary properties for the application. As a comparison, coatings produced by lamination were used, a method extensively used in the industry for paper coating. The methodology adopted involved the synthesis of nanoparticles by green method, application of the polymer in the form of coating on cellulosic substrate, characterization of morphology and barrier properties of coated paper, besides characterization of antimicrobial activity by inhibition of bacterial biofilm of the coatings. In order to evaluate possible application in the food industry, a migration test was performed to quantify whether the silver content that can migrate into the food is suitable for consumption within the guidelines of ANVISA. The results revealed that it was possible to produce coating with weight and thickness within the one used in the industry for paper coatings (8 to 15 g/m2 ) and that the polymeric layer coated the paper uniformly. All coatings with silver nanoparticles as antimicrobial agent showed a degree of inhibition to the growth of E. coli and S. aureus bacteria. The release of silver to the food simulant was within the permitted (< 0.05 mg/kg) in the coatings produced with nanoparticles incorporated in the polymer emulsion.