SARATOV FALL MEETING SFM 

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Freezing-induced loading of inorganic nanoparticles into porous mineral matrices

P.A. Demina
Saratov State University, 83 Astrakhanskaya Street, Saratov, 410012 Russia
T.V. Bukreeva
Shubnikov Institute of Crystallography of Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, Leninskii pr. 59, Moscow, 119333 Russia
National Research Center “Kurchatov Institute”, pl. Kurchatova 1, Moscow, 123182 Russia
M.V. Lomova
Saratov State University, 83 Astrakhanskaya Street, Saratov, 410012 Russia

Abstract

The preparation of novel composite materials with enhanced functional properties requires highly efficient loading of inorganic nanoparticles into porous mineral matrices.
Freezing-induced loading (FIL) is a brand-new method of different inorganic nanoparticle and macromolecule loading into porous mineral matrices from an aqueous medium which provides high-efficient loading composites. This method is based on movement of the water crystallization front during controllable freezing. Сhanging the number of loading cycles as well as the colloid concentration gives an option to control the nanoparticle content in composites.
FIL allows high-efficient loading of magnetite and titania nanoparticles into porous matrix of calcium carbonate with vaterite structure. Nanoparticle loading was shown to depend on the number of loading cycles and the colloid concentration.
The work was supported by Russian Science Foundation (project No. 19-73-10123).

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Demina Polina Anatolievna
Saratov State University
Russia

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