American Journal of Essential Oils and Natural Products
2019, Vol. 7 Issue 2, Part A
Controlled release of Licaria puchury-major essential oil encapsulated in PCL/gelatin-based colloidal systems and membranes
AUTHOR(S): Larissa M de Oliveira, Suzan X Lima, Laiane S da Silva, Josiana M Mar, Sidney G Azevedo, Maxwaldo S Rabelo, Henrique D da Fonseca Filho, Pedro H Campelo and Edgar A Sanches
ABSTRACT:Different concentrations of the essential oil (EO) from Licaria puchury-major (Lauraceae) was encapsulated in polycaprolactone (PCL)/gelatin wall materials in the colloid systems form. PCL/gelatin-based colloid systems were prepared using the coacervation method with encapsulation efficiency higher than 90%. The colloid form containing 500 mg mL-1 of EO was freeze-dried to form membrane-based micro particles. Then, the EO controlled release from all samples was evaluated. The loaded and unloaded nanoparticles were spherical and dependent on the EO concentration, with average size estimated to be 60–310 nm. The zeta potential technique indicated a stable colloidal system. The FTIR spectra of the colloidal systems and membrane confirmed the successful encapsulation of EO within the wall materials. The membrane images revealed that the lyophilization process promoted an agglomeration of nanoparticles, resulting in particles in micrometric sizes. All colloidal systems released their EO up to 100 h. The EO release from membrane was faster than that observed for the colloidal systems. The Korsmeyer-Peppas model better adjusted the controlled release data of the colloidal systems confirming the anomalous or non-Fickian type diffusion mechanism. The same model also better adjusted the controlled release data of the membrane system with n>0.5. The EO from L. puchury-major could be encapsulated successfully within the developed PCL/gelatin particles. The developed colloidal systems or membrane-based gelatin particles containing this EO was shown to be feasible as a sustainable alternative as a natural bio-defensive due to their encapsulation efficiency, biodegradability and abundance of this plant in the Amazon region.
Pages: 23-29 | 369 Views 39 Downloads
How to cite this article:
Larissa M de Oliveira, Suzan X Lima, Laiane S da Silva, Josiana M Mar, Sidney G Azevedo, Maxwaldo S Rabelo, Henrique D da Fonseca Filho, Pedro H Campelo and Edgar A Sanches. Controlled release of Licaria puchury-major essential oil encapsulated in PCL/gelatin-based colloidal systems and membranes. American Journal of Essential Oils and Natural Products. 2019; 7(2): 23-29.