Encapsulating cinnamon bark oil in chitosan using ionotropic gelation and their characterization
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Date
2024
Journal Title
Journal ISSN
Volume Title
Publisher
Faculty of Science, University of Kelaniya Sri Lanka
Abstract
Cinnamon bark oil (CBO) is well known for its antimicrobial properties. Hence, it has the potential to be used as a food preservative, an insecticide, etc. However, the direct application of CBO in their free native forms is limited due to some drawbacks like high volatility, changing texture and flavor etc. Therefore, encapsulation is a widely used technique to overcome the drawbacks of direct application of oil and to enhance the different potential functionalities of cinnamon bark oil. Encapsulation is a process to entrap active components within a thin coating. This study aims at encapsulating CBO using the ionotropic gelation technique. It is a technique that is used to synthesize micro- and nanoparticles based on electrostatic interactions between ions with different charges. In this technique, sodium tripolyphosphate (STPP) was used as the cross-linker, and chitosan was used as the polymer to formulate CBO-containing micro capsules. CBO was characterized using GC-MS. The micro encapsulation parameters were optimized by varying the amounts of polymer (1–3%), cinnamon bark oil (1–3 g), and STTP (0.5–1%). The effect of varying process parameters on the encapsulation efficiencies (EE%), oil loading capacity (LC%), and oil release profile were determined by weightbased calculation. The formulated capsules were characterized using scanning electron microscopy (SEM). The GC-MS analysis of CBO showed the presence of cinnamaldehyde (74.615%) as the major compound. The SEM images showed that the synthesized capsules are spherical in shape with a smooth surface. Their size varied between 100 and 1000 nm. Varying the process parameters has a direct impact on the EE% and LC%. The optimum formulation for cinnamon oil micro capsules is chitosan 3 g, CBO 3 g, STTP, 1% with an EE of 85.31% and a LC of 16.52%. The oil release rate increased with time, according to the oil release profile. These findings indicate that CBO can be successfully encapsulated within chitosan using the ionotropic gelation method.
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Keywords
Cinnamon bark oil, Chitosan, STTP, Encapsulation, Cross linker
Citation
Jayasinghe J. M. H. M.; Shivanthini K. D. C.; Wickramarachchi S. R. (2024), Encapsulating cinnamon bark oil in chitosan using ionotropic gelation and their characterization, Proceedings of the International Conference on Applied and Pure Sciences (ICAPS 2024-Kelaniya) Volume 4, Faculty of Science, University of Kelaniya Sri Lanka. Page 57