Influence of wall materials on the microencapsulation of pequi oil by spray drying

Abstract

The aim of this study was to assess the influence of the wall materials on the microencapsulation of pequi oil. An emulsion containing pequi oil in the oil phase was microencapsulated by spray drying process at 120 °C using gum Arabic, maltodextrin, or a 25:75 (w/w) mixture of gum Arabic and maltodextrin as wall material. The emulsions were characterized for droplet size, Polydispersity Index (PDI), and zeta potential. Pequi oil microparticles were analyzed for moisture content, water activity, wettability, encapsulation efficiency, antioxidant capacity, and color. Ultrastructural examination was performed by Scanning Electron Microscopy (SEM). The Droplet Size Distribution (DSD) of the emulsions exhibited a relatively wide size distribution (2.67 to 8.96 μm) and high PDI (> 0.3). Smooth microparticles with high encapsulation efficiency (79.17% to 84.20%), and good antioxidant capacity (28.20 to 28.71 μmol Trolox equivalents/g dry extract) were obtained. Microparticles prepared using gum Arabic as wall material had higher antioxidant capacity than that prepared with maltodextrin. All microparticles had satisfactory encapsulation efficiency, water activity, moisture content, and wettability. These results indicate that pequi oil microparticles have characteristics that can contribute to good stability during storage and handling of encapsulated oil. Therefore, pequi oil can be successfully encapsulated by spray drying using gum Arabic, maltodextrin, or 25:75 (w/w) mixture of gum Arabic and maltodextrin as wall materials, but the physicochemical properties of microparticles vary with wall material composition.

Microencapsulated and Ready-to-Eat Beetroot Soup: A Stable and Attractive Formulation Enriched in Nitrate, Betalains and Minerals

“…The encapsulating starch and maltodextrin agents applied herein provided beetroot soup stability by increasing the negative surface charges of the beetroot soup zeta potential 2-fold. Negative charges are common to starch and maltodextrin, with negative zeta potentials reported for both catechin-starch and pequi ( Caryocar brasiliense ) oil-maltodextrin microparticles in other studies [ 64 , 65 , 66 ]. These findings demonstrate the effectiveness of microencapsulation employing starch and maltodextrin to improve beetroot soup stability.…”

Development of stability, antioxidant, and antimicrobial properties of biopolymeric chitosan modified starch nanocapsules containing essential oil

“…There were significant differences ( p < 0.05) between encapsulated sample with CS: Hicap (1.5:8.5%) and other treatment which expound that CS has a preferable susceptibility of encapsulating monoterpenes are found in the essential oils than Hicap, and also that a mixture of the two achieved excellent encapsulation efficiency. EE values can be varied from 0% to 95% depending on different factors, such as the core and wall component, the core/polymer ratio and the physical and chemical characteristics of the emulsions (Santos et al, 2020). Improvement in the shelf life of the nanocapsules is resulted by reaching to higher values of encapsulation efficiency.…”

O limiar entre farmácia e alimentos: Microencapsulação de vitamina B12 para enriquecimento de alimentos plant-based

“…O mesmo é bombeado para o bico atomizador contido dentro do tanque aquecido, onde irá ocorrer a atomização do fluido, esta etapa garante o aumento da área de contato, e ao ser exposto a alta temperatura favorece a secagem, após a secagem/encapsulamento o pó é direcionado para o ciclone que irá coletar com mais facilidade os sólidos mais leves através da perda de energia cinética, e a fim de assegurar a separação dos sólidos leves e do ar úmido dispensado no final do processo pelo exaustor. A principal diferença entre secagem e encapsulamento via spray dryer é a presença e proporção de material de parede na suspensão quando se visa o encapsulamento de compostos (Santos et al, 2020;Pereira et al, 2018).…”

“…A aplicação da microencapsulação pelo spray dryer visa assegurar a proteção, direcionamento, e estabilidade do composto ativo, além de oferecer versatilidade para a micropartícula por camuflar características sensoriais indesejadas (Aditya & Ko, 2015;Araújo et al, 2022;Santos et al, 2020). Todavia, ao utilizar a microencapsulação emprega-se o uso de agentes carreadores para envolver o elemento de interesse e permitir a proteção em diversas condições, além de conceder a liberação controlada (Mazzocato & Trindade, 2016).…”