Preparation of Sericite-TiO₂ Composite Particle Material by Mechano-Chemical Method and its Application

Abstract

Sericite-TiO2 composite particle material was prepared via mechano-chemical method. SEMEDS and XPS ananlysis indicates that the surface of the sericite were coated by the TiO2 layers and the Ti4+ cations were anchored by formation of SiOTi bonds. Otherwise, the TiO2-coated sericite powders have higher light scattering indexes and other more outstanding properties than the naked sericite powders. Especially, the whiteness, adsorbed value, and hiding power indexes of the rutile TiO2-coated sericite powders were higher than those of the anatase TiO2-coated sericite powders. Hence, rutile TiO2-coated sericite powders can be substitute for the titanium dioxide pigment.

Preparation of TiO2-coated barite composite pigments by the hydrophobic aggregation method and their structure and properties

“…To improve the dispersion of TiO 2 and the compatibility of TiO 2 with organic matrices, researchers have focused on developing new inorganic pigments comprising inorganic particles uniformly and firmly coated with TiO 2 13 . In these research, many inorganic non-metallic minerals have been used as substrates, including calcined kaolin 14 , sericite 15 , and silica 16 . Methods such as homogeneous hydrolysis 17 and mechanochemistry have also been applied to the preparation of TiO 2 -coated inorganic composite particles.…”

Mechanical Grinding Preparation and Characterization of TiO2-Coated Wollastonite Composite Pigments

“…In order to improve the dispersity and compatibility of the TiO 2 particles with the matrix, as well as to maximize its pigment function, a new kind of inorganic pigment that can coat TiO 2 firmly onto the surface of inorganic particles, such as nonmetal minerals, is widely considered. Until now, some TiO 2 composite pigments were prepared by TiOSO 4 hydrolysis and calcination on the surfaces of barite [ 8 ], kaolinite [ 9 , 10 , 11 , 12 ] and mica [ 13 , 14 , 15 ] and some other TiO 2 composite pigments were prepared by way of a mechano-chemical method using barite [ 16 ], calcium carbonate [ 17 , 18 ], brucite [ 19 ], calcined kaolin [ 20 ], sericite barite [ 21 ] and silica [ 22 ] as the core and TiO 2 particles as the shell.…”