PVA hydrogel as polymer electrolyte for electrochemical impedance analysis on archaeological metals

•It is proposed the poly(vinyl alcohol) for punctual and in-situ EIS analysis.•An electrochemical cell is built in order to place the self-consistent disk of PVA.•The conductivity of PVA is tested.•EIS spectra are obtained employing PVA instead of traditional solution.•PVA polymer electrolyte membra...

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Bibliographic Details
Published in:Journal of cultural heritage 2019-05, Vol.37, p.113-120
Main Authors: Di Turo, Francesca, Matricardi, Pietro, Di Meo, Chiara, Mazzei, Franco, Favero, Gabriele, Zane, Daniela
Format: Article
Language:English
Subjects:
Ancient metals
Cultural heritage
EIS
Hydrogels
PVA
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Summary:•It is proposed the poly(vinyl alcohol) for punctual and in-situ EIS analysis.•An electrochemical cell is built in order to place the self-consistent disk of PVA.•The conductivity of PVA is tested.•EIS spectra are obtained employing PVA instead of traditional solution.•PVA polymer electrolyte membranes perform likely electrolytic solutions. The development of an electrochemical cell based on poly(vinyl alcohol) (PVA) hydrogel as polymer electrolyte for electrochemical impedance spectroscopy analysis (EIS) is discussed. PVA hydrogel is prepared with different cycles of freeze/thawing (F/T) employing distillated and mineral water as solutions. The PVA-disks obtained are compared for their conductivities in order to employ it in an appropriate cell for diagnostic purposes, reducing the invasiveness of the analysis on the sample. The test of the self-consistent disk of PVA is carried out on a modern sample of copper and on an archaeological bronze coin, obtaining an alternative of the classical electrochemical cell for EIS measurements on ancient metals.
ISSN:1296-2074
1778-3674
DOI:10.1016/j.culher.2018.09.017