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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.)

High solids emulsions produced by ultrasound as a function of energy density

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Author(s):
Consoli, Larissa ; Furtado, Guilherme de Figueiredo ; da Cunha, Rosiane Lopes ; Hubinger, Miriam Dupas
Total Authors: 4
Document type: Journal article
Source: ULTRASONICS SONOCHEMISTRY; v. 38, p. 772-782, SEP 2017.
Web of Science Citations: 10
Abstract

The use of emulsifying methods is frequently required before spray drying food ingredients, where using high concentration of solids increases the drying process yield. In this work, we used ultrasound to obtain kinetically stable palm oil-in-water emulsions with 30 g solids/100 g of emulsion. Sodium caseinate, maltodextrin and dried glucose syrup were used as stabilizing agents. Sonication time of 3, 7 and 11 min were evaluated at power of 72, 105 and 148 W (which represents 50%, 75% and 100% of power amplitude in relation to the nominal power of the equipment). Energy density required for each assay was calculated. Emulsions were characterized for droplets mean diameter and size distribution, optical microscopy, confocal microscopy, xi-potential, creaming index (CI) and rheological behavior. Emulsions presented bimodal size distribution, with D-{[}3,D-2] ranging from 0.7 to 1.4 gm and CI between 5% and 12%, being these parameters inversely proportional to sonication time and power, but with a visual kinetically stabilization after the treatment at 148 W at 7 min sonication. D-{[}3,D-2] showed to depend of energy density as a power function. Sonication presented as an effective method to be integrated to spray drying when emulsification is needed before the drying process. (C) 2016 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 type: Multi-user Equipment Program
FAPESP's process: 15/11984-7 - Production of microparticles containing fat-soluble active cores by atomization in spray drying: effect of emulsions properties on the characteristics of the final product
Grantee:Miriam Dupas Hubinger
Support type: Regular Research Grants