A polythelene glycol (PEG) polymer was synthesized using a dip coating procedure on 316L stainless steel (SS) substrate pre coated by radio frequency RF inductively coupled plasma polymerization with di (ethylene glycol) vinyl ether (EO2V) monomer that was used as a primer coat. The primer and PEG composite film was studied with profilometer, visible-light microscope, scanning electron microscope (SEM) and a tape test to evaluate thickness, stability, morphology and adhesion. Response of the PEG composite film to an AC electric perturbation was studied as a function of hydration state using impedance spectroscopy (IS). A resistor/capacitor network was used to interpret the impedance spectra. The 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.
Revised: December 12, 2008 |
Published: May 1, 2007
Citation
Al-Hamarneh I.F., P.D. Pedrow, S.C. Goheen, and M.J. Hartenstine. 2007.Impedance Spectroscopy Study of Composite Thin Films of Hydrated Polyethylene Glycol.IEEE Transactions on Plasma Science 35, no. 5:1518-1526, (Part 2).PNNL-SA-52043.doi:10.1109/TPS.2007.906136