A polyethylene glycol (PEG) polymer was synthesized using a dip coating procedure on 316L stainless steel (SS) substrate pre-coated with a primer that consisted of radio frequency RF 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.
Revised: January 8, 2008 |
Published: October 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 PT. 2:1518-1526.PNNL-SA-56266.doi:10.1109/TPS.2007.906136