Structure and Properties of Nanodispersed Silica Synthesized by the Sol-Gel Method

It is substantiated that among the whole variety of pozzolanic additives of various origin and composition, one of the most effective is nanodispersed silica. This is due to its high activity and the possibility of using it in small dosages. At the same time, the simplest method of its teaching in terms of instrumentation is sol-gel synthesis. The effectiveness of the author’s modernized production of aqueous solutions of silica nanoparticles has been proven. Structural and topological parameters (shape and size of individual particles and their agglomerates) of nanodispersed silica synthesized by the modernized sol-gel method are shown. Comparison of industrially produced silica with synthesized was made. Differences in the structure of powders obtained by various methods are substantiated, taking into account the type of surfactant. The physicochemical features of nanodispersed silica synthesized using various surfactants are shown. The principal possibility of obtaining structurally stable nanodispersed silica with high dispersity, ultra-small sizes of individual particles and their regular shape during the formation of a powdery substance with high activity is shown. It is substantiated that the selection of stabilizers and additional components of the raw mixture makes it possible to control the synthesis of a substance with the formation of the required structural parameters (morphology and particle size) and physicochemical properties.

V.V. NELUBOVA, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
E.O. KUZMIN, Engineer, postgraduate student (This email address is being protected from spambots. You need JavaScript enabled to view it.),
V.V. STROKOVA, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Belgorod State Technological University named after V.G. Shukhov (46, Kostyukova Street, Belgorod, 308012, Russian Federation)

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