Biopolímeros para o nanoencapsulamento do óleo essencial de pau-rosa (Aniba rosaeodora Ducke)

Abstract

The search for plants with pharmacological, herbal, nutraceutical and cosmetic potentials has been increasing in recent decades. In this context, species that produce essential oils (EO), especially rosewood (Aniba rosaeodora Ducke), a native Amazonian species of great economic value. The commercialization and transport of rosewood oil in export markets can be affected by the physical and chemical transformations that occur in the oil itself, causing the loss of volatile compounds and compromising its integrity. In this sense, nanotechnology can become a valuable alternative to solve this problem, through the process of nanoencapsulation. The commercialization and transport of rosewood oil in export markets can be affected by the physical and chemical transformations that occur in the oil itself, causing the loss of volatile compounds and compromising its integrity. In this sense, nanotechnology can become a valuable alternative to solve this problem, through the process of nanoencapsulation. Considering the economic potential of the target species and the importance of applying innovative technologies to strengthen production chains and the bioeconomy in the Amazon, the present study aimed to develop an innovative bioproduct using natural polymers (vegetable starches) as a polymer matrix. for the nanoencapsulation of rosewood oil, aiming to guarantee the quality of the product with the physical and chemical integrity of the oil and to add value to the final product for export. The studies were developed in the Laboratory of Tropical Forestry and Digital Technologies (LASTED); Laboratory of Food Technology (LTA) and in the Thematic Laboratory of Microscopy and Nanotechnology (LTMN) both located in the National Institute for Amazon Research-INPA. Initially, emulsions were made based on commercial gum arabic and manioc gum 1%, 3% and 5%m/m, separately, with different concentrations of rosewood oil extracted from leaves and young branches. The nanoencapsulates were obtained by means of a vortex, followed by drying in the Nano Spray dryer, in which the parameters of feed flow rate, drying flow rate and drying temperature were determined. The results were evaluated by F test of analysis of variance (ANOVA) and Tukey's test at 5% level of significance using Minitab version 18 and BioEstat 5.0 software. The results showed that the three concentrations of rosewood oil used, were feasible for nanoencapsulation. Arabic gum was the best polymeric matrix for nanoencapsulation, proving to be effective in all treatments applied. The nanocapsules with the highest yield were those made from gum arabic, oil and distilled water.