Complex coacervation assisted by a two-fluid nozzle for microencapsulation of ginger oil: Effect of atomization parameters

Autor(es)

Ferreira, Sungil ; Nicoletti, Vania Regina

• Tipo de documento: Artigo Científico
• Fonte: Food Research International; v. 138, p. 12-pg., 2020-12-01.

Resumo

This study investigates the influence of the atomization parameters on complex coacervation by atomization, and is following a preceding study that presented the technique and investigated the effects of formulation. Complex coacervated capsules were produced by atomization, using emulsions with 1 and 6%(w/w) of gelatin and ginger oil atomized over a 1%(w/w) solution of gum Arabic, at constant polymer ratio of 1:2 (gelatin:gum Arabic) at pH 3.5. The air velocity at the nozzle varied from 72 to 168 m/s and the emulsion velocity at the nozzle varied from 0.4 to 0.6 m/s, maintaining the air to liquid velocity ratio at 170, 220 and 270. The mean diameter of the microcapsules produced varied from 52 to 75 mu m and no crosslinking agents were used. The influence of atomization numbers Weber (We) and Ohnesorge (Oh), shear rate and shear stress on the encapsulation performance was carried out and a proposed model was able to predict the final size of the microcapsules produced at We >= 180 and Oh = 0.063. Encapsulation efficiency varied from 9 to 95%, and encapsulation yield varied from 50 to 99%. Finally, optimum conditions based on size prediction and microencapsulation parameters were proposed. (AU)

• Processo FAPESP: 18/16976-0 - Desenvolvimento de processos contínuos para produção de microcápsulas de oleoresina de gengibre (Zingiber officinale Roscoe) por coacervação complexa: atomização e emulsificação por membrana
• Beneficiário: Sungil Ferreira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado Direto
• Processo FAPESP: 15/23290-0 - Desenvolvimento de processos semi-contínuos para produção de microcápsulas de óleo de gengibre (Zingiber officinale Roscoe) por coacervação complexa: atomização e emulsificação por membrana
• Beneficiário: Sungil Ferreira
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto