Impedance spectroscopy study of composite thin films of hydrated polyethylene glycol
Impedance spectroscopy study of composite thin films of hydrated polyethylene glycol
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DOI：
10.1109/tps.2007.906136
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发表时间：
2007-10-01
影响因子：
1.5
通讯作者：
Hartenstine, Michael J.
中科院分区：
文献类型：
--
作者：
Al-Hamarneh, Ibrahim F.;Pedrow, Patrick D.;Hartenstine, Michael J.
采用浸渍涂覆工艺，在316L不锈钢(SS)基材上预涂以射频感应耦合等离子体聚合的二乙二醇乙烯基醚(EO2V)为底漆，合成了聚乙二醇聚乙二醇乙烯基醚聚合物。用轮廓仪、光学显微镜、扫描电子显微镜(SEM)和胶带试验分别对底漆和聚乙二醇复合膜的厚度、覆盖率、形貌和附着力进行了研究。用阻抗谱(IS)研究了聚乙二醇复合膜对外加交流电压的响应与水化状态的关系。用电阻/电容网络来解释阻抗谱。随着脱水过程的进行，聚乙二醇膜的电容呈指数衰减式下降。聚乙二醇膜电容衰减符合描述水分子在聚乙二醇膜中扩散的模型。
A polyethylene glycol (PEG) polymer was synthesized using a dip-coating procedure on 316L stainless-steel (SS) substrate precoated with a primer that consisted of radiofrequency inductively coupled plasma-polymerized di (ethylene glycol) vinyl ether (EO2V). The primer and PEG composite film was studied with profilometer, optical microscope, scanning electron microscope (SEM), and a tape test to evaluate thickness, coverage, morphology, and adhesion, respectively. Response of the PEG composite film to an applied ac voltage was studied as a function of hydration state using impedance spectroscopy (IS). A resistor/capacitor network was used to interpret the impedance spectra. Electrical capacitance of the PEG film decreased with an exponentially decaying term as dehydration progressed. PEG-film capacitance decay was consistent with a model describing water molecules diffusing through the PEG film.