Physico-Chemical nanomaterials science

Nanostructural, biocolloid and physicochemical factors of stress phenomena in iron-aluminum silicate aqueous dispersions
Kovzun I.G.1, Panko A.V.1, Nikipelova O.M.2, Prokopenko V.A. 1,3, Tsyganovich О.А.1,3, Oliinik V.O.1
1 F.D.Ovcharenko Institute of biocolloid chemistry of NAS of Ukraine, 
Ak.Vernadskogo Blvd. 42, Kyiv 03680, Ukraine. E-mail: gr.k.ibcc@ukr.net
2 SA «Ukrainian Research Institute of Medical Rehabilitation and Balneology, Ministry of Health of Ukraine», Lermontovskiy Lane 6, Odessa 65014, Ukraine.
3 National technical University of Ukraine «KPI», 
Peremohy Ave., 37, building 4, Kyiv 03056, Ukraine. 

Completed investigations gave a possibility to develop conceptions of theoretical and experimental transformation mechanisms for iron-aluminum silicate ingredients of concentrated sediment and soil dispersions in conditions of stress processes [1-3]. It was indicated the master role of nano- and microstructures in stress processes of geomechanic and biocollid dispersing, and further coagulation and condensation transformation in conditions of dispersion plastic flow. It was, for the first time, showed that increasing of disperse phase concentration and increasing of iron compounds content in aluminosilicate dispersions having variable content of surfactants and hydrated iron oxides leads to viscous flow character of such dispersions changes in next way: thixotropic → dilatant-rheopexic → hyperanormal → ultraanomal. Occurrence conditions of viscosity ultraanomal effect for iron-aluminum silicate dispersions and influence of stress phenomena on it while mudflow shearing of underwater and surface sediments and soil. On basis of stated mechanisms the science-based recommendations of controlling stress phenomena with a help of fine-fraction technogenic sludges and piles of ironsilicate ore materials were given.

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2.	Prokopenko, V.A., Kovzun, I.G., Ulberg, Z.R., Tsiganovich, O.A., Panko, A.V. Physicochemical geomechanics and nanochemical processes in natural and technogenic minerals // Visnyk of the National Academy of Sciences of Ukraine.-2018.- N 2.-P. 83-96, DOI 10.15407/visn2018.02.083.
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