Microencapsulation of Flaxseed Oil by Spray Drying: Effect of Oil Load and Type of Wall Material

作者：Tonon Renata V^*; Pedro Ranie B; Grosso Carlos R F; Hubinger Miriam D

来源：Drying Technology, 2012, 30(13): 1491-1501.

DOI：10.1080/07373937.2012.696227

• Emulsion properties
• Encapsulation efficiency
• Flaxseed oil
• Microencapsulation
• Spray drying

The objective of this work was to evaluate the effect of the type of wall material and the oil load on the microencapsulation of flaxseed oil by spray drying. Gum arabic, whey protein concentrate, and a modified starch were used to produce the microcapsules, each with four oil concentrations (10, 20, 30, and 40% oil, w/w, with respect to total solids), for a total of 12 tests. Initially, the feed emulsions were characterized for stability, viscosity, and droplet size. Then they were dried in a laboratory-scale spray dryer and the resulting particles were analyzed for encapsulation efficiency, lipid oxidation, moisture content, and bulk density. The increase in oil concentration led to the production of emulsions with larger droplets and lower viscosity, which directly affected powder properties, resulting in lower encapsulation efficiency and higher lipid oxidation. Among the three wall materials evaluated, the modified starch showed the best performance, with the highest encapsulation efficiency and lowest peroxide values.

• 出版日期2012