Microencapsulation of pequi pulp by spray drying: use of modified starches as encapsulating agent

Engenharia Agrícola

Audirene A. Santana²  Rafael A. De Oliveira¹  Louise E. Kurozawa¹  Kil J. Park¹ 

[1],Universidade Estadual de CampinasCampinas SP ,Brazil

关键词: Caryocar brasiliense;    spray drying;    experimental design;    encapsulation;    morphology;    Caryocar brasiliense;    secagem por aspersão;    planejamento experimental;    encapsulação;    morfologia;   

DOI  :  10.1590/S0100-69162014000500017

来源: SciELO

【 摘 要 】

The aim of this study was to evaluate the microencapsulation of pequi pulp by spray drying. A central composite rotational design was used in order to evaluate the effect of the independent variables: inlet air temperature, surfactant concentration and modified starch concentration. The dependent variables were assumed as yield of the process and the product features microencapsulated. A selection of the best process condition was performed to obtain the best condition of a product with the highest vitamin C and carotenoids content. Powders showed moisture content below 2%. The experimental values of hygroscopicity, yield, water activity, total carotenoids and vitamin C powders ranged from 7.96 to 10.67 g of adsorbed water/100g of solids, 24.34 to 49.80%, 0.13 to 0.30, 145.78 to 292.11 mg of ascorbic acid/g of pequi solids and 15.51 to 123.42 mg of carotenoids/g of pequi solids, respectively. The inlet air temperature 140°C, the surfactant concentration of 2.5% and the modified starch concentration of 22.5% was recommended as the selected condition. By the scanning electron microscopy, it was observed that most of the particles had spherical shape and smooth surface.

【 授权许可】

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