HYGROSCOPICITY OF CLAYPOLYMERIC COMPOSITES

UDC 550.4.422:631:66.047 • 📖 Issue 27 / 2017 • 22 — 29 pages

https://doi.org/10.15407/znp2017.27.022

Yu. Fedorenko, A. Rozko, I. Zharin

Yu. Fedorenko, Researcher, SI “Institute of Environmental Geochemistry of NAS of Ukraine”

Rozko, Ph.D (Geology), Senior Researcher in the M.P. Semenenko Institute of Geochemistry, Mineralogy and Ore Formation of NAS of Ukraine, al.rozko@gmail.com

Zharin, Leading Specialist in Center for Innovative Technologies of the National Aviation University

Abstract

Moisture absorption by clay polymer composites occurs both by condensation of the moisture in the hydrophilic pores and capillaries, and by introduction of the condensate into the walls of pores and capillaries under the influence of osmotic forces that cause swelling of the samples. The hygroscopic humidity of the samples at 12 ÷ 16 ° C can exceed 75% and depends on the activation temperature, the composition and the conditions for their polymerization. Activation of the samples at the temperature over 150 o C increases the moisture absorption by the silica gels and reduces the total moisture absorption by the composites, apparently due to the destruction or partial imidization in the polymer component. The ability of the clay polymeric composites to absorb a significant amount of the water vapor combined with their low cost allows us to suggest the use of these materials in the high humidity environments for prevention of corrosion, conservation and long-term storage of equipment, etc.

Key words: geological repository, metal canisters, bentonite, corrosion.

Article



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