TITLE

Dielectric water sorption analysis

AUTHOR(S)
Penon, M. Giacomelli; Picken, S. J.; Wübbenhorst, M.; de Vos, G.; van Turnhout, J.
PUB. DATE
November 2006
SOURCE
Review of Scientific Instruments;Nov2006, Vol. 77 Issue 11, p115107
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The sorption of water vapor in Kapton® (polyimide) films has been investigated with a new method, dielectric sorption analysis (DSA). The technique is based on high-resolution time-resolved capacitance measurements performed during exposure of an organic coating to humidified nitrogen. The basis of the method is described together with experimental details related to the capacitance measurement, long-term stability, reproducibility, and other characteristics of the setup. The technique allows the determination of the sorption/desorption and diffusion characteristics of a coating on a time scale varying from seconds to days. Mass transport properties derived from complementary weight measurements are in good agreement with the DSA results. Real-time monitoring of the moisture sorption in organic coatings demonstrates the potential of the technique in the field of nondestructive coating inspection and testing.
ACCESSION #
23420623

 

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