Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/55113
Title: Avaliação do processo de microencapsulação do ferro através da técnica de gelificação iônica utilizando diferentes blendas poliméricas
Other Titles: Evaluation of the iron microencapsulation process through the ionic gelification technique using different polymeric blends
Authors: Botrel, Diego Alvarenga
Botrel, Diego Alvarenga
Borges, Soraia Vilela
Monteiro, Paulo Sérgio
Keywords: Gelificação iônica
Alginato
Sulfato ferroso
Maltodextrina
Sistemas de liberação controlada
Ionic gelation
Alginate
Ferrous sulfate
Maltodextrin
Controlled release
Issue Date: 15-Sep-2022
Publisher: Universidade Federal de Lavras
Citation: MENDES, B. P. M. Avaliação do processo de microencapsulação do ferro através da técnica de gelificação iônica utilizando diferentes blendas poliméricas. 2022. 55 p. Tese (Doutorado em Engenharia de Biomateriais) – Universidade Federal de Lavras, Lavras, 2022.
Abstract: Iron is an essential nutrient that can be easily oxidized by changing environmental conditions. Fortification, by adding iron compounds directly to foods, had been studied as a method of overcoming iron deficiency. However, this fortification introduces problems such as impacts on the taste and appearance of the products. The objective of the present work was to evaluate the process of encapsulation of iron through the technique of ionic gelation, using alginate as an encapsulating matrix, adding maltodextrin and modified starch. To define the best conditions for microencapsulation of iron, the work was carried out in stages. Solutions were produced using the alginate combined with other biopolymers. These solutions were characterized and analyzed by analysis of atomic absorption, encapsulation efficiency, morphology, size distribution and release profile. The encapsulation efficiency, asset retention over time and the controlled release process were determined in different simulated environments. The encapsulation efficiency values for iron in the treatments produced with the use of pressurized air varied between 93.60% and 94.04%. These high values of encapsulation efficiency show that alginate, alginate and maltodextrin, alginate and modified starch systems are compatible matrices that can be used to encapsulate emulsions containing iron (Fe2+). in stages. All formulations showed good encapsulation efficiency and showed good homogeneity and size dispersion. Regarding the release profile, there was a difference regarding the stability of the microspheres produced by the different methods. Regarding the in vitro digestibility results, it is possible to observe higher values of iron release in the gastric system when compared to the intestinal system. With this, we can conclude that it is possible to develop a controlled release system containing iron, efficient and stable, using alginate and complementary biopolymers such as starch and maltodextrin.
URI: http://repositorio.ufla.br/jspui/handle/1/55113
Appears in Collections:Engenharia Florestal - Doutorado (Teses)



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