Effect of variable temperature loads on characteristics of electrochrome composite Ni (OH)2-PVA films

Authors

DOI:

https://doi.org/10.15587/1729-4061.2020.220302

Keywords:

electrochromic device, electrochemical deposition, nickel hydroxide, template, polyvinyl alcohol, temperature tests, adhesion

Abstract

Electrochromic coating is the basis of smart windows with variable optical characteristics. Nevertheless, despite the obvious advantages of using smart windows in construction, their cost is high.

We have considered the coatings obtained by the cathodic template method, which are more economical in production. The presented studies are devoted to tests at cyclic temperature loads – repeated cooling and heating. The paper shows the influence of the medium and the method of heat supply (removal) to an electrochromic electrode based on a composite Ni(OH)2-PVA coating as well as the effect of surface preparation before its application.

As a medium for cyclic temperature loads, we used air or a working electrolyte – 0.1 M KOH. As a preliminary preparation of the transparent electrically conductive base, we used electrochemical etching of a part of the layer of the electrically conductive transparent coating of tin oxide doped with fluorine in a solution of 1 M HCl.

The result of a series of experiments was the discovery of a strong influence of temperature cyclic loads on the final characteristics of electrochromic films. The electrochromic film on the sample, which was subjected to cyclic temperature changes in air and on the substrate without etching, almost completely lost its electrochromic characteristics and adhesion. The sample, which was subjected to thermal stress in an alkali solution, lost its uniformity during coloring.

On the other hand, both films, which were deposited on etched substrates, had generally better characteristics than samples deposited without etching and subjected to thermal stress in the air and in alkali. In this case, the sample, which was obtained on the substrate with pretreatment by etching and subjected to temperature cycling in alkali, had even slightly better characteristics than the reference sample

Author Biographies

Valerii Kotok, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005 Vyatka State University Moskovskaya str., 36, Kirov, Russian Federation, 610000

PhD, Associate Professor

Department of Processes, Apparatus and General Chemical Technology

Senior Researcher

Competence center "Ecological technologies and systems"

Vadym Kovalenko, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005 Vyatka State University Moskovskaya str., 36, Kirov, Russian Federation, 610000

PhD, Associate Professor

Department of Analytical Chemistry and Chemical Technology of Food Additives and Cosmetics

Senior Researcher

Competence center "Ecological technologies and systems"

Inna Anataichuk, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005

Senior Lecturer

Department of International Cooperation

Artem Mochalov, Vyatka State University Moskovskaya str., 36, Kirov, Russian Federation, 610000

Specialist

Department of Postgraduate, Doctoral Studies and SRW

Natalia Makarchenko, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005

PhD, Associate Professor

Department of Inorganic Substances and Ecology

Rovil Nafeev, State University of Telecommunications Solomianska str., 7, Kyiv, Ukraine, 03110

PhD, Senior Lecturer

Department of Physics

Volodymyr Verbitskiy, National Pedagogical Dragomanov University Pyrohova str., Kyiv, 9, Ukraine, 01601 National Ecological and Naturalistic Center for Student Youth Vyshhorodska str., 19, Kyiv, Ukraine, 04074

Doctor of Pedagogical Sciences, Professor

Department of Medical, Biological and Valeological Basics of Life and Health Protection

Director

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Published

2020-12-31

How to Cite

Kotok, V., Kovalenko, V., Anataichuk, I., Mochalov, A., Makarchenko, N., Nafeev, R., & Verbitskiy, V. (2020). Effect of variable temperature loads on characteristics of electrochrome composite Ni (OH)2-PVA films. Eastern-European Journal of Enterprise Technologies, 6(5 (108), 6–14. https://doi.org/10.15587/1729-4061.2020.220302

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Section

Applied physics