Journal
DRYING TECHNOLOGY
Volume 31, Issue 11, Pages 1245-1254Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/07373937.2013.785432
Keywords
Encapsulation efficiency; Flavor; Gum arabic; Response surface methodology; Spray-drying
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Funding
- FAPEMIG (Minas Gerais State Foundation for Research Development, Brazil)
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This study evaluated the influence of wall material concentration (10-30%), inlet temperature (135-195 degrees C), and feed rate (0.5-1.0L center dot h(-1)) on the properties of rosemary oil microencapsulated by spray-drying, with gum arabic as carrier. Powder recovery, surface oil, oil retention, and hygroscopicity varied from 17.25%-33.96%, 0.03%-0.15%, 7.15%-47.57%, and 15.87%-18.90%, respectively. The optimized conditions were determined to be a wall material concentration of 19.3%, an inlet air temperature of 171 degrees C, and a feed flow rate of 0.92L center dot h(-1). At this condition, particles presented no fissures and the compositions of pure and microencapsulated oil were similar. The sorption isotherms could be described by the GAB model.
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