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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of process conditions on the microencapsulation of coffee oil by spray drying

Full text
Author(s):
Frascareli, E. C. [1] ; Silva, V. M. [1] ; Tonon, R. V. [1, 2] ; Hubinger, M. D. [1]
Total Authors: 4
Affiliation:
[1] Univ Estadual Campinas, Fac Food Engn, BR-13083862 Campinas, SP - Brazil
[2] Embrapa Food Technol, BR-23020470 Rio De Janeiro, RJ - Brazil
Total Affiliations: 2
Document type: Journal article
Source: FOOD AND BIOPRODUCTS PROCESSING; v. 90, n. C3, p. 413-424, JUL 2012.
Web of Science Citations: 148
Abstract

Microencapsulation is a good alternative to transform liquid food flavourings, such as coffee oil, into stable and free-flowing powders. Thus the aim of this study was to evaluate the influence of process conditions on the microencapsulation of coffee oil by spray drying, using gum Arabic as encapsulating agent. The effect of total solid content (10-30%), oil concentration with respect to total solids (10-30%) and inlet air temperature (150-190 degrees C) on the encapsulation efficiency, oil retention, moisture content and powder hygroscopicity were evaluated by a complete 2(3) central composite rotatable design. Both encapsulation efficiency and oil retention were negatively influenced by oil concentration and inlet air temperature, and positively affected by total solid content, which could be related to the emulsion viscosity and droplet size. Particles produced at the optimized process conditions (30% of total solids, 15% of oil with respect to total solids and inlet air temperature of 170 degrees C) were evaluated for oxidative stability and showed to be stable during storage at 25 degrees C, but not at 60 degrees C. At this temperature, pure oil presented higher lipid oxidation than encapsulated, confirming the protective effect of microencapsulation on the oxidative stability of this product. (C) 2011 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 09/54137-1 - Acquisition of a particle size/distribution analyzer, a zeta potential measurement system, a spray dryer, and an ultra-high-pressure liquid chromatograph/mass spectrometer
Grantee:Miriam Dupas Hubinger
Support Opportunities: Multi-user Equipment Program