Influence of emulsion composition and inlet air temperature on the microencapsulation of flaxseed oil by spray drying

Autor(es)

Tonon, Renata V. ^[1] ; Grosso, Carlos R. F. ^[1] ; Hubinger, Miriam D. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Fac Food Engn, BR-13083862 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Food Research International; v. 44, n. 1, p. 282-289, JAN 2011.
• Citações Web of Science: 211

Resumo

The objective of this work was to study the influence of some process conditions on the microencapsulation of flaxseed oil by spray drying. The process was carried out on a mini spray dryer and gum Arabic was used as wall material. Seventeen tests were made, according to a central composite design. Independent variables were: inlet air temperature (138-202 degrees C), total solid content (10-30% w/w) and oil concentration with respect to total solids (10-30% w/w). Encapsulation efficiency, lipid oxidation and powder bulk density were analyzed as responses. Powder morphology and particle size distribution were also analyzed. The feed emulsions were characterized with respect to droplet size and viscosity. Higher solid content and lower oil concentration led to higher encapsulation efficiency and lower lipid oxidation, which was related to the higher emulsion viscosity and lower droplets size. Increasing drying temperature resulted in higher lipid oxidation. Bulk density increased when higher solid content and lower inlet air temperature were used. The particles were rounded and shriveled, and their mean diameter was mainly affected by total solid content. (C) 2010 Elsevier Ltd. 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
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
• Processo FAPESP: 09/52014-0 - Avaliação da influência do material de parede, do tamanho das gotas da emulsão e do tamanho das partículas na microencapsulação do óleo de linhaça por spray drying
• Beneficiário: Renata Valeriano Tonon
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado