Structure-property relationship between surface structure and water dispersity of titanium dioxide
The wettability and dispersion of titanium dioxide in water is very important for the inorgan-ic coating and application performance.In this study,the relationship between the surface structure and the water wettability and dispersion of titanium dioxide treated with zinc and aluminum salts was stud-ied.The results show that the initial titanium dioxide treated with zinc salt has good sphericity and small particle size,and the initial titanium dioxide treated with aluminum salt has a long strip shape,with rich-er surface hydroxyl,higher surface energy and thicker electric double layer structure.In addition,when the dosage of dispersant was 0.2％and the concentration of TiO2 was 700 g/L,the viscosity of the ini-tial zinc salt slurry was 946 mPa·s,and the zeta potential was-23.3 mV.The viscosity of the initial alu-minum salt slurry was 512 mPa·s,and the zeta potential was-31.2 mV.The results show that the slurry viscosity of the aluminum salt is lower,the dispersion is better,and the water wetting dispersion is bet-ter.The surface structure of titanium dioxide treated with different salts was analyzed,and the structure-activity relationship between surface structure and water dispersion was established,which provided ref-erence and ideas for the development of high-end titanium dioxide.
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