Print: | ISSN 0256-1115 |
Online: | ISSN 1975-7220 |
Korean Journal of Chemical Engineering,
Vol.33, No.9, 2732-2737, 2016 Formation of uniform TiO2 nanoshell on α-alumina nanoplates for effective metallic luster pigments
To synthesize non-corroding effect pigment appearing metallic silver in color, we coated uniform anatase TiO2 nanoshell via sol-gel chemistry. Under the reaction condition using 3M TiCl4 aqueous solution : deionized water : HCl solution=0.75mL : 20 mL : 0 mL, ~50 nm-thick smooth TiO2 nano-shell was fully coated on the surface of α-alumina nanoplates; consequently, the synthesized effect pigments exhibited similar lustering effect and structuring color to commercial effect pigment. Under relatively acidic condition and higher TiCl4 precursor concentration condition (3 M TiCl4 aqueous solution : deionized water :HCl solution=0.75mL : 20 mL : 0.05mL for acidic condition and 1.0 or 1.5mL : 20 mL : 0 mL for higher TiCl4 precursor concentration condition), rougher TiO2 shell was formed.
Keywords:
α-Alumina Nanoplates; TiO2 Shell; Roughness Control; Effect Pigment; Metallic Silver Color
[References]
|