Release of Thyme Oil from Polylactide Microcapsules

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Isabel M. Martins (Autor) Outra; Rodrigues, SN (Autor) Outra; Barreiro, MF (Autor) Outra; Alírio Rodrigues (Autor) FEUP

Revista

Título: Industrial & Engineering Chemistry Research

Vol. 50

Páginas: 13752-13761

ISSN: 0888-5885

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 20 Citações

Scopus - 30 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

Outras Informações

ID Authenticus: P-002-HNG

DOI: 10.1021/ie200791r

Abstract (EN): Microencapsulation reveals numerous advantages over conventional applications of flavors or fragrances. Thus, the goal of this work was to study the release rate of thyme oil through the polylactide (FLA) microcapsules prepared by coacervation. Microcapsules have spherical shape and a mean particle size of 36 mu m. The results show that the release of thymol is faster in the first hour and remains almost constant in the next days. Moreover, it was observed that the release of the polar compounds of thyme oil is faster than the apolar ones. The diffusion coefficient in the first hour of release was 1.39 x 10(-15) m(2)/s for thymol and 5.21 x 10(-17) m(2)/s for p-cymene. For a period of 5 days, diffusion coefficients of 3.81 x 10(-17) m(2)/s for thymol and 1.43 x 10(-18) m(2)/s for cymene were determined. The diffusion of thyme oil from the PLA cross-linked membrane was dependent on the microcapsules morphological characteristics.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10