Electrostatic Stabilization of Hydrosols of Calcium Carbonate Nanoparticles Synthesized by the Template Method

• Published in: Colloid journal of the Russian Academy of Sciences Vol. 82; no. 2; pp. 115 - 121
• Main Authors: Eurov, D. A., Shvidchenko, A. V., Kurdyukov, D. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-03-2020; Springer Nature B.V
• Subjects: Aggregates; Calcium carbonate; Chemistry; Chemistry and Materials Science; Colloiding; Ferric chloride; Iron chlorides; Nanoparticles; Polymer Sciences; Silicon dioxide; Stabilization; Surfaces and Interfaces; Synthesis; Thin Films
• ISSN: 1061-933X; 1608-3067
• DOI: 10.1134/S1061933X20020040

A method has been developed for the synthesis of calcium carbonate particles with the use of mesoporous silica particles as a template. Hydrosols of the synthesized CaCO
3
particles are unstable with respect to aggregation at neutral pH values and coagulate to yield aggregates with submicron sizes. A procedure of electrostatic stabilization by adding an aqueous FeCl
3
solution has been proposed for the preparation of aggregatively stable hydrosols. It has been shown that this procedure of stabilization leads to the peptization of the aggregates and makes it possible to obtain individual calcium carbonate nanoparticles with sizes of 50−80 nm. The obtained CaCO
3
nanoparticles are porous, thereby making it possible to use their stable hydrosols in medicine.