Aproveitamento de resíduos de poliestireno para produção de verniz usando o solvente D-Limoneno

Abstract

The use of plastic is linked to serious environmental problems due to its long permanence in dumps and landfills, since plastic waste takes a long time to decompose. On the other hand, the mass disposal of orange peels can also cause environmental impacts, but its use in the chemical industry, especially in the extraction of compounds such as D- Limonene, offers a sustainable and economically viable alternative. In this context, varnish based on polystyrene waste and orange peel oil emerges as a promising solution to reduce environmental impacts, reducing the disposal of polystyrene and orange peels in landfills. This work aims to take advantage of polystyrene waste for the production of varnish using the solvent based on orange peel, synthesize the solvent D-Limonene from orange peels, synthesize the varnish from the mixture of polystyrene and D-Limonene and evaluate the quality parameters of the varnish. The methodology used was based on the statistical planning of mixtures, where varnish was produced, with a constant composition of 0.5 g of expanded polystyrene and 1, 2 and 3 ml of D-Limonene extracted from the orange peel. The results indicate that the average amount of D-Limonene oil obtained was 2.98 ml from 200 g of orange peels mixed with 300 ml of water, with an average collection time per trial of 2 hours and 22 minutes. The resulting varnish has a cloudy appearance and smells of D-Limonene. After the evaluation, it was found that a sample of 1 ml of oil and 0.5 g of expanded polystyrene presented the ideal composition, gg with a time of 16.18 minute drying, 4.01 cm 3 density, 2.4% water absorption and water content non-volatiles of 17.16%. The varnish, in addition to offering exceptional protection and impeccable finish, has been formulated with components that minimize environmental impacts, making it a more environmentally friendly and responsible choice. Polystyrene-based varnish contributes to the reduction of negative environmental impacts associated with this material, as its use enables recycling and subsequent application in civil construction, adding value to infrastructures and extending its useful life.