Liquid Diffusion in Polymers by Electrochemical-Impedance Spectroscopy (EIS)

Chauffaille, S.; Devos, Olivier; Jumel, Julien; Shanahan, Martin E.R.

doi:10.4028/www.scientific.net/DDF.297-301.239

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Effects of Processing Factors on Microstructure and Diffusivity of Diethylbenzene Dehydrogenation Catalyst
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Liquid Diffusion in Polymers by Electrochemical-Impedance Spectroscopy (EIS)
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Diffusion in Materials by Atomic-Scale Modeling: Exploiting the Predictive Power of Classical and First-Principles Molecular Dynamics
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Numerical Study of a Vertical Solidification Process under Magnetic Field in Unsteady State
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Liquid Diffusion in Polymers by Electrochemical-Impedance Spectroscopy (EIS)

Abstract:

Preliminary results on a technique of Electrochemical-Impedance Spectroscopy (EIS) applied to the characterization of diffusion and absorption properties of water in an epoxy resin are reported. Thin films of polymer adhering to aluminum constitute simulated adhesive bonds. Immersion in water and assessment via electro-chemical impedance measurements allowed estimation of diffusion rates and water uptake. In parallel, classic gravimetric experiments were undertaken on thin, free films of the same polymer. Results of the two techniques are acceptably comparable, and thus EIS could be developed as a new tool for in situ assessment of adhesives.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 297-301)

Main Theme:

Diffusion in Solids and Liquids V

Edited by:

Prof. Andreas Öchsner, Prof. Graeme E. Murch, Ali Shokuhfar and Prof. João M.P.Q. Delgado

Pages:

239-243

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.297-301.239

Citation:

S. Chauffaille et al., "Liquid Diffusion in Polymers by Electrochemical-Impedance Spectroscopy (EIS)", Defect and Diffusion Forum, Vols. 297-301, pp. 239-243, 2010

Online since:

April 2010

Authors:

S. Chauffaille, Olivier Devos, Julien Jumel, Martin E.R. Shanahan

Keywords:

Absorption, Diffusion, Electrochemical Impedance Spectroscopy (EIS), Epoxy Resin (ER), Gravimetry, Thin Film

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References

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DOI: https://doi.org/10.1016/j.porgcoat.2008.08.028

Paper TitlePages

Electrochemical Impedance Spectroscopy Behaviour of NdFeB Coated Magnets in Saliva Solution for Orthodontic Applications

Authors: Luigi Calabrese, Lucio Bonaccorsi, Chiara Borsellino, Angela Caprì, Francesca Fabiano, Edoardo Proverbio

Abstract: In this work the assessment of the corrosion performances in saliva solution of NdFeB magnets coated with silane layers was studied for its application in orthodontic brackets. The silane film, deposited by dip coating technique, has been prepared with varying dipping steps, with the purpose to identify the number of layers able to achieve an optimal protective action. Corrosion protection performance, during immersion in Fusayama synthetic saliva solution, was evaluated by means electrochemical impedance spectroscopy (EIS). The silane coatings evidenced good barrier properties resulting in an improvement of the anti-corrosion performances of the magnets. Better results were observed for samples with at least 15 layers of silane, that evidenced still acceptable protective action after three days of immersion in a Fusayama synthetic saliva solution.

515

Release of Metals from Cans during Short-Term Storage

Authors: Maroš Halama, Thomas Beyreder, Daniela Vasilková, Dáša Halamová

Abstract: Nowadays, cans are used widely to store and keep safely juices, drinks and liquid products with different taste. Especially in food industry one has to consider the eﬀects of the content of inner side of the can due to the fact that some of the liquids can be very aggressive to the metals and surface treatment. The subject of this paper was to investigate the run-oﬀ-eﬀect of metals from can into the solutions and analyze the data retrieved by Electrochemical Impedance Spectroscopy (EIS) and Linear Voltammetry (LV) techniques. We have observed phenomenon that release of metals is not only time but also temperature dependent. We have built equivalent circuits models for various conditions for both aluminum and tin cans. The aim of the project was to calculate “run-off” effect of Al and Sn from cans into drink during short-term storage and compare it with WHO norm.

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