Microencapsulation of Gac Oil by Spray Drying: Optimization of Wall Material Concentration and Oil Load Using Response Surface Methodology

Abstract

The objective of this study was to optimize the wall material concentration and the oil load on the encapsulation of Gac oil using spray drying by response surface methodology. Results showed that the quadratic polynomial model was sufficient to describe and predict encapsulation efficiencies in terms of oil, -carotene, lycopene, peroxide value (PV), moisture content (MC), and total color difference ( E) with R 2 values of 0.96, 0.95, 0.86, 0.89, 0.88, and 0.87, respectively. Under optimum conditions (wall concentration of 29.5 % and oil load of 0.2), the encapsulation efficiencies for oil, -carotene, lycopene, PV, MC, and E were predicted and confirmed as 92 %, 80%, 74 %, 3.91 meq/kg, 4.14 % and 12.38, respectively. The physical properties of the encapsulated oil powders obtained by different formulations were also determined. It was concluded that the protein-polysaccharide matrix as the wall material was effectively used for spray-drying encapsulation of Gac oil.

Optimising the Encapsulation of an Aqueous Bitter Melon Extract by Spray-Drying

“…The yield of encapsulated powder from the spray-drying process is mainly determined by the efficiency with which the powder is collected. Usually, a low process yield is due to the sprayed droplets and powder sticking to the wall of the chamber and cyclone before they are sufficiently dry and therefore, this material is unable to be collected [24,25,26]. …”

“…The lower yields obtained from spray-drying with the lower concentrations of the encapsulating agents in the stock solution (Figure 1a, Table 4, Equation (3)) and the higher ratios of the extract solution to the encapsulating agent solution are both likely to have been caused by an insufficient amount of the encapsulating agents being available to completely cover the sprayed water droplets, which would have caused some of the droplets to stick to the spray dryer’s chamber wall before they were sufficiently dry [25]. Essentially, the lower concentrations of the encapsulating agents in the agents’ aqueous stock solution and adding relatively more of the aqueous bitter melon extract relative to the encapsulating agent stock solution (Table 1) both resulted in lower concentrations of the encapsulating agents in these infeed solutions.…”

A storage study of encapsulated gac ( Momordica cochinchinensis ) oil powder and its fortification into foods

“…The optimum formulation for the preparation of the gac oil powder and wall material emulsion using whey protein concentrate and gum Arabic (7/3, g/g) for spray drying was a 29.5% solution and an oil load of 0.2 g/g (Kha et al, 2014b). For spray drying in a LabPlant SD-06A spray dryer (LabPlant UK Ltd., North Yorkshire, UK), the optimum conditions were an inlet temperature of 154 • C, outlet temperature of 80 • C, feed flow rate of 970 mL/h, air flow speed of 4.3 m/s, and pressure of 2 bar (Kha et al, 2014c).…”

Understanding the Influence of Encapsulating Matrix on the Physical and Thermal Properties of Oregano Essential Oil Powder

“…The microencapsulation method via spray drying has been widely employed for encapsulation of essential oils and other flavors, due to the efficiency in the retention of volatile compounds and protection of the active compound against external agents, such as light and oxygen (Adamiec and Kalemba, 2006;Kha et al, 2014;Liu et al, 2001). In addition to their technical advantages (Liu et al, 2015), this technique allows the combination of encapsulating agents, including those with low cost, to produce higher quality products with lower production cost, which increases the industrial interest (Vaidya et al, 2006).…”