Search academic texts

Registration Number

0221U101551, 0120U105075 , R & D reports

Title

New functional materials using the ability to control the phase state of substances in the boundary layer of nano-antioxidants based on graphene for the treatment of cardiovascular diseases

Head

Turov Volodymyr V., Доктор хімічних наук

Registration Date

22-01-2021

Organization

Chuiko Institute of Surface Chemistry of NAS of Ukraine

Description

 For concentrated suspensions of hydrophobic silica and its mixtures 1/1 and 1/2 with hydrophilic silica, the effect of machining on the viscosity of the suspension and their stability for suspensions in the range h = 2.0-8.0 g / g was studied. Several methods were used to create mechanical loads: mechanical activation (loading due to force between convex and curved spherical surfaces), extrusion, rapid mixing in the gap between two cylindrical surfaces. Based on the work performed, it was found that the viscosity and phase state of suspensions are very sensitive to the method of creating mechanical loads, the concentration of suspensions and the speed of the loading device. All types of composite systems showed significant thixotropic properties, which are manifested depending on the viscosity of the holding time of the sample in stationary conditions. This effect exists in both static and dynamic conditions. Under static conditions, after the cessation of mechanical loads, the liquid suspension hardens in 0.2-2 hours and turns into a substance that has all the characteristics of a solid. Under dynamic conditions, the viscosity of the suspension can decrease 5-10 times under increasing loads.

Product Description

popup.authors

Yelagina Nataliya I
Gunko Volodymyr M.
Dihtyaruk Evgeniy O.
Krupska Tetiana V.
Tkachuk Olha I.