Behavior of beeswax and edible oils mixtures in supercritical carbon
dioxide at moderate temperature
Abstract
This study investigated the behavior of lipid mixtures of beeswax with
avocado oil or Brazil nut oil in supercritical CO2 processing. It
entailed the measurements of melting temperature (Tm), solidification
temperature (Ts), volumetric expansion (Ve), solubility of supercritical
CO2, and solubility of the lipid mixtures in supercritical CO2 at fixed
pressures. The Tm and Ts of lipid mixtures decreased progressively to a
lower level (closer to 150 bar) that were then increased with increasing
pressure. The volumetric expansion, solubility of supercritical CO2, and
solubility of the lipid mixtures in supercritical CO2 increased as
pressure increased. On the basis of the results, particle formation
using these lipid mixtures as carrier materials could be feasible with
supercritical CO2 at a temperature of 60 °C and pressures from 150 to
300 bar. The moderate temperature of the process could allow its
application with thermally labile bioactive compounds.