Determination of menthol kinetic constants with Love-wave device
Determination of menthol kinetic constants with Love-wave device
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DOI：
10.1016/j.snb.2006.04.049
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发表时间：
2006-10-25
影响因子：
8.4
通讯作者：
Conedera, Veronique
中科院分区：
文献类型：
--
作者：
Razan, Florence;Rebiere, Dominique;Conedera, Veronique
在需要真实的时间分析和高灵敏度的传感器应用中，爱波器件获得了极大的兴趣。这些设备被证明适用于感测质量等物理量。这种效应被称为声学传感器中的主要感测机制，并且由于其高灵敏度，Love波可以检测声学传播介质表面上的小质量负载。本文提出了一种新的挥发性物质蒸发的准真实的时间表征方法，利用Love波装置测定了薄荷醇与乙基纤维素（EC）缔合时的挥发性物质蒸发动力学常数。为此，薄荷醇和乙基纤维素的混合物沉积作为敏感涂层与喷涂系统。实验包括记录薄荷醇和乙基纤维素薄膜沉积过程中的频移。挥发性化合物的蒸发通过膜的质量变化在真实的时间内进行。一个适合的爱波传感器响应允许确定相关的挥发性化合物的蒸发动力学的特征常数在几分钟内。(c)2006 Elsevier B.V.保留所有权利。
Love-wave devices gained enormous interest for sensor applications which need real time analyses and high sensitivity. These devices proved to be suitable for sensing physical quantities like mass. This effect is known as the main sensing mechanism in acoustic sensors and thanks to their high sensitivity, Love-wave can detect a small mass loading on the surface of the acoustic propagation medium. In this study, we present a new method to characterize in quasi real time evaporation of volatile compounds instead of several weeks for current experiments.A Love-wave device is used to determine menthol evaporation kinetic constant when menthol is associated with a polymer called ethyl cellulose (EC). For that, menthol and ethyl cellulose mixture were deposited as sensitive coating with a spray coating system. Experiments consisted in recording of frequency shifts during deposition of menthol and ethyl cellulose thin film. The evaporation of the volatile compound was followed in real time through mass variations of the film. A fit of the Love-wave sensor response allowed to determine characteristic constants associated to the evaporation kinetic of volatile compound in a few minutes. (c) 2006 Elsevier B.V. All rights reserved.