Nano-encapsulation of Eucalyptus citriodora Oil: Preparation and Characterization

Abstract

Eucalyptus citriodora oil is an essential oil that contains volatile active compounds. To slow down the process of releasing such volatile compounds, a binding agent such as a polymer matrix is needed. This research aimed to prepare and characterize the properties of Eucalyptus citriodora oil encapsulated in polymer matrices. Development of nanoencapsulated Eucalyptus citriodora was prepared using the melt-dispersion method and polymer matrices (PEG-6000 and paraffin wax) with the addition of Mentha piperita oil as aroma enhancer at a ratio of 1:1. The gas chromatography analysis showed that Eucalyptus citriodora oil contains volatile compounds (citronellal 76.17%). The nanoencapsulated eucalyptus powder produced using the PEG-6000 matrix, in terms of properties, was better than that using paraffin for having smaller particle size and being difficult to agglomerate at room temperature. The average size of oil droplets of nanoencapsulated Eucalyptus citriodora in the PEG-6000 matrix was 235.35 nm with a PDI of 0.339. The morphological analysis using a transmission electromagnetic microscope indicated that the average droplet size was less than 100 nm. This product can be used as a breath-relieving aromatherapy powder by wrapping it in porous paper to be inhaled.