In situ infrared spectroscopic and scanning Kelvin probe measurements of water and ion transport at polymer/metal interfaces
In situ infrared spectroscopic and scanning Kelvin probe measurements of water and ion transport at polymer/metal interfaces
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原位红外光谱和扫描开尔文探针测量聚合物/金属界面处的水和离子传输
DOI：
10.1016/j.electacta.2005.09.024
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发表时间：
2006
影响因子：
6.6
通讯作者：
G. Grundmeier
中科院分区：
文献类型：
--
作者：
K. Wapner;M. Stratmann;G. Grundmeier
扫描ATR光谱和扫描开尔文探针研究是研究水和离子在聚合物/金属界面传输的新的分析技术。扫描ATR光谱分析粘结剂/金属界面上的水传输的新方法与沿粘结剂接头传输水的传输模式的扫描测量和通过粘结剂的垂直方向的水传输的非扫描ATR测量相结合。在某些情况下，由于D2O在红外光谱中具有良好的可追踪性，因此选择D2O来代替水。基于界面电极电位的局部测量，选择了扫描开尔文探针来检测水合碱性离子在胶粘剂/金属界面上的迁移动力学。附赠的FT-IR技术表明，在环氧胶与铁的界面扩散中，水的扩散比通过胶粘剂本身的传输快大约两个数量级。水合离子也显示了类似的界面迁移动力学。此外，本文给出的FT-IR-ATR和SKP结果揭示了在界面带水存在的情况下，促进粘着的有机硅烷层和作为添加剂的有机硅烷如何在聚合物/金属界面上起作用。
Scanning ATR-spectroscopy and scanning Kelvin probe studies are introduced as new analysis techniques for the study of water and ion transport at polymer/metal interfaces. The new approach of scanning ATR spectroscopic analysis of water transport at the adhesive/metal interface is combined with scanning measurements in transmission mode of water transport along adhesive joints and non-scanning ATR-measurements of the water transport in a vertical direction through the adhesive. D2O was chosen in some cases instead of water due to its excellent traceability in the infrared spectra. A scanning Kelvin probe was chosen for the detection of the transport kinetics of hydrated alkali ions along the adhesive/metal interface based on the local measurement of interfacial electrode potentials. The complimentary FT-IR techniques showed that the interfacial diffusion of water, in the case of epoxy adhesives on iron, is about two orders of magnitude faster that the transport through the adhesive itself. Similar transport kinetics at the interface is also shown by hydrated ions. Moreover, the here presented FT-IR–ATR and SKP results reveal more information on how adhesion promoting organosilane layers and organosilanes as additives act at polymer/metal interfaces in the presence of water incorporated in the interphase zone.