Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
Effect of the temperature on the controlled release of actives in gellan gum-based microcapsules
Submission Author:
Mateus de Lima , RJ
Co-Authors:
Mateus de Lima, Jorge Antonio Avendaño Benavides, Marcio CARVALHO
Presenter: Mateus de Lima
doi://10.26678/ABCM.ENCIT2022.CIT22-0179
Abstract
Microcapsules are composed of single or multiple cores, which can be made of gas bubbles or liquid drops, covered by a shell. They are attractive candidates for encapsulating, transporting, or controllably releasing a wide variety of important active materials. The delivery can be initiated by a wide variety of mechanisms, such as pH and temperature changes. In addition to being widely used in the pharmaceutical, food and cosmetic industries, microcapsules are also a viable solution in the biomedicine and in the petroleum industry. In times when sustainability is necessary to alleviate environmental issues, biodegradable substances become viable solutions for socio-environmental development. Thus, this study develops a technique for the controlled release of actives in thermosensitive microcapsules based on gellan gum biopolymer through a temperature trigger event. We studied the influence that different levels of temperature exert on the release time of the actives from the microcapsules. Tests were performed with both fixed and variable temperatures in order to investigate whether the heat rate influences the speed of the inner content’s delivery. In addition, we also studied the effect that physical, such as shell diameter and shell thickness, have on the release rate. For this, the release dynamics of capsules with different diameters, from 190 to 500 um, and shell thickness were studied.
Keywords
microcapsules, controlled release, Temperature, gellan gum
