Release Studies of Thymol and p-Cymene from Polylactide Microcapsules

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Isabel M. Martins (Author) Other; Rodrigues, SN (Author) Other; Barreiro, MF (Author) Other; Alírio Rodrigues (Author) FEUP

Journal

Title: Industrial & Engineering Chemistry Research

Vol. 51

Pages: 11565-11571

ISSN: 0888-5885

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 13 Citations

Scopus - 14 Citations

Other information

Authenticus ID: P-002-5JD

DOI: 10.1021/ie301406f

Abstract (EN): The objective of this work is to access the release behavior of thymol and p-cymene used as model core materials with PLA microcapsules. The microcapsules were obtained by a coacervation process developed in a previous work and present a spherical shape with mean particle size of 25 and 37 mu m for thymol and p-cymene, respectively. The results have shown that the release of thymol and p-cymene is faster in the first hour keeping almost constant in the subsequent days. The diffusion coefficient in the first hour of release was 1.99 X 10(-16) m(2)/s for thymol and 4.34 X 10(-16) m(2)/s for p-cymene. However, the diffusion was slower if considering a period of 5 days being the diffusion coefficients of 3.34 X 10(-19) m(2)/s for thymol and 3.45 X 10(-18) m(2)/s for cymene.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7