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

Autor(es)

Consoli, Larissa ; Furtado, Guilherme de Figueiredo ; da Cunha, Rosiane Lopes ; Hubinger, Miriam Dupas

• Tipo de documento: Artigo Científico
• Fonte: ULTRASONICS SONOCHEMISTRY; v. 38, p. 772-782, SEP 2017.
• Citações Web of Science: 10

Resumo

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)

• Processo FAPESP: 09/54137-1 - EMUS: aquisição de um analisador de distribuição de tamanho de partículas, um medidor de potencial zeta, um spray dryer e um sistema de cromatografia líquida de ultra alta pressão / espectrômetro de massa
• Beneficiário: Miriam Dupas Hubinger
• Linha de fomento: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 15/11984-7 - Produção de micropartículas contendo ativos lipossolúveis através da secagem por atomização em spray drying: influência das propriedades das emulsões nas características do produto final
• Beneficiário: Miriam Dupas Hubinger
• Linha de fomento: Auxílio à Pesquisa - Regular