水分和温度触发挥发性活性剂从大豆蛋白涂层纸中释放：玻璃化转变现象对香芹酚扩散系数的影响。

Moisture and temperature triggered release of a volatile active agent from soy protein coated paper: effect of glass transition phenomena on carvacrol diffusion coefficient.

作者信息

Chalier Pascale, Ben Arfa Afef, Guillard Valerie, Gontard Nathalie

机构信息

UMR IATE (Ingenierie des Agro-polymeres et des Technologies Emergentes), Universite Montpellier II, place Eugene Bataillon, Montpellier cedex, France.

出版信息

J Agric Food Chem. 2009 Jan 28;57(2):658-65. doi: 10.1021/jf802254p.

DOI:10.1021/jf802254p

PMID:19154166

Abstract

Carvacrol release from SPI-coated papers was evaluated at different relative humidities (RH; 60, 80, and 100%) and storage temperatures (5, 20, and 30 degrees C). Effective carvacrol diffusivities were determined from experimental release kinetics and by using a mathematical model based on Fick's second law. Increasing storage temperature and RH lead to an increase of carvacrol diffusivity. Depending on the relative humidity, the carvacrol effective diffusivity varied from 1.71 x 10(-16) to 138 x 10(-16) m(2)/s at 30 degrees C, from 0.85 x 10(-16) to 8.78 x 10(-16) m(2)/s at 20 degrees C, and from 0.11 x 10(-16) to 7.50 x 10(-16) m(2)/s at 5 degrees C. The combined effect of relative humidity and temperature on diffusivity was particularly marked at 30 degrees C and 100% RH. The temperature and relative humidity dependence of carvacrol release was related to the glass transition phenomenon and its effect on chain protein mobility and carvacrol diffusivity.

摘要

在不同相对湿度（RH；60%、80%和100%）以及储存温度（5℃、20℃和30℃）条件下，对香芹酚从SPI涂层纸中的释放情况进行了评估。根据实验释放动力学并使用基于菲克第二定律的数学模型，测定了香芹酚的有效扩散系数。储存温度和相对湿度的增加会导致香芹酚扩散系数的增加。在30℃时，根据相对湿度的不同，香芹酚的有效扩散系数在1.71×10⁻¹⁶至138×10⁻¹⁶ m²/s之间变化；在20℃时，为0.85×10⁻¹⁶至8.78×10⁻¹⁶ m²/s之间；在5℃时，为0.11×10⁻¹⁶至7.50×10⁻¹⁶ m²/s之间。相对湿度和温度对扩散系数的综合影响在30℃和100%相对湿度时尤为显著。香芹酚释放对温度和相对湿度的依赖性与玻璃化转变现象及其对链蛋白流动性和香芹酚扩散系数的影响有关。