Resumo

RIOS-AGUIRRE, Sara  e  GIL-GARZON, Maritza Andrea. Microencapsulation of Bioactive Compounds in Diverse Matrices by Spray Drying: A Literature Review. TecnoL. [online]. 2021, vol.24, n.51, pp.206-229.  Epub 11-Out-2021. ISSN 0123-7799.  https://doi.org/10.22430/22565337.1836.

Microencapsulation by spray drying is widely used to protect bioactive compounds, especially polyphenols in different matrices. It is also one of the simplest and most economical drying techniques, which has favored its technological transfer to industrial scale. Therefore, this article analyzes, based on previous studies, the operating parameters used in the implementation of methods for the microencapsulation of bioactive compounds present in various matrices, in order to identify effective conditions for future applications. This literature review covered the period between 2010 and 2021 in indexed databases, focusing on multiple parameters: operating conditions, encapsulating materials, microcapsule morphology, and microencapsulation efficiency. The results enabled us to identify the most critical parameters. Among them, air inlet and outlet temperatures stand out, as well as encapsulating materials; they directly influence the protection of polyphenols, which are mostly thermolabile. The studies reviewed here show that greater efficiency and useful life (with respect to functional properties) can be obtained by optimizing the aforementioned operating conditions. Furthermore, the results reported in this paper can be used to obtain microcapsules of matrices that can be used as a raw material, high-quality final product, or for controlled release in vitro studies in the food, pharmaceutical, or cosmetic industries.

Palavras-chave : Microencapsulation; spray drying, antioxidant capacity; protection of polyphenols; fruits; encapsulants and encapsulation efficiency.

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