Embalagem biopolimérica com extrato de folha de oliveira para aplicação no setor cosmético

Abstract

Consumer awareness about the damage that plastic packaging waste causes to the environment, together with the growing search for environmentally friendly alternatives (eco-friendly) in the production of packaging, has been the subject of studies in order to replace petroleum-derived polymers with natural polymers with the addition of active compounds derived from food and vegetables to obtain active packaging. In this conception, the objective of this course conclusion work was to produce biopolymeric films based on carrageenan and gelatin with olive leaf extract for application as packaging for cosmetics. Olive leaf extraction was performed using the maceration technique and the active compounds were characterized in relation to antioxidant activity and total phenolic compounds. The biopolymer films were produced by the casting method, using carrageenan/gelatin as a polymer matrix, glycerol as a plasticizer, water as a solvent and olive leaf extract as an additive. In the films produced, the thickness, the water vapor permeability (WVP), the maximum stress at breakage of the film and the percentage of elongation at breakage of the film were evaluated. To evaluate the feasibility of application of the films produced, they were tested in the packaging of liquid and solid soap. All film formulations were flexible and easy to handle, the films without the addition of extract were clear and transparent, while the films added with extract showed a characteristic coloring of the extract. The results obtained in the analysis of thickness, PVA, maximum stress at break and percentage of elongation at break, for the first k-carrageenan formulation were 0.02 mm, 2.41.10-09 g.m-1 .Pa-1 .s-1 , 67.22 MPa, 5.94%; for the gelatin formulation they were 0.04 mm, 3.44.10-10 g.m-1 .Pa-1 .s-1 , 9.45 MPa, 45.05%; for the third formulation of k-carrageenan and gelatin were 0.041 mm, 6.54.10-11 g.m-1 .Pa-1 .s-1 , 27.47 MPa, 2.19%. The k-carrageenan and gelatin film showed the best values. The addition of extract in the formulation altered the properties of the films, mainly decreasing the WVP. The applicability of the films in the packaging of liquid and solid soap proved to be promising, in both cases it was possible to contain the product. So, it is possible to produce k-carrageenan and gelatin-based films with potential application for packaging, however, further studies are needed in order to elucidate the mechanical properties of the films according to their application. The results revealed that the films produced are promising for this application, especially the film composed of the carrageenan/gelatin blend. Thus, it is concluded that biopolymeric films based on carrageenan/gelatin incorporated with extracts of olive leaves present themselves as a promising active packaging for the cosmetic sector.