Modeling the controlled release of essential oils from a polymer matrix-A special case

被引：0

作者：

Tramón, C. ^{[1
]}

机构：

[1] Agricultural Engineering Faculty, University of Concepción, Avda. Vicente Méndez 595, 3801061 Chillán, Chile

来源：

Industrial Crops and Products | 2014年 / 61卷

关键词：

Diffusion in liquids - Essential oils;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Experimental evidence of a vacancy diffusion mechanism has been found in menthol/LDPE and thymol/LDPE solid-state diffusing systems, when samples are prepared by melting, mixing, and casting. The void pattern found in the cross-section of the samples after volatile release suggests the occurrence of a phenomenon similar to the Kirkendall effect. A Dusty Gas model, consistent with a Kirkendall system where no macroscopic volume change occurs, is proposed to describe the kinetics of the controlled release of the essential oils from the polymer matrix. The interdiffusion coefficient is predicted via a Free-Volume theory. The prediction of the diffusion coefficient and the simulation results are in good agreement with experimental gravimetric data. © 2014 Elsevier B.V.

引用

页码：23 / 30