Korean Journal of Chemical Engineering, Vol.33, No.9, 2732-2737, September, 2016
Formation of uniform TiO2 nanoshell on α-alumina nanoplates for effective metallic luster pigments
E-mail:
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.
- Debeljak M, Hladnik A, Cerne L, Gregor-Svetec D, Color Res. Appl., 38, 168 (2012)
- Pfaff G, Inorg. Mater., 39, 123 (2003)
- Stengl V, Subrt J, Bakardjieva S, Kalendova A, Kalenda P, Dyes Pigment., 58, 239 (2003)
- Teaney S, Pfaff G, Nitta K, Eur. Coat. J., 4, 90 (1999)
- Sharrock S, Schuel N, Eur. Coat. J., 1/2, 20 (2000)
- Suh MW, Lee SJ, You MS, Park SB, Im SH, RSC Adv., 5, 56954 (2015)
- Cheng H, Ma J, Zhao Z, Qi L, Chem. Mater., 7, 663 (1995)
- Yang J, Lin Y, Meng Y, Korean J. Chem. Eng., 30(11), 2026 (2013)
- Chu VB, Park SJ, Park GS, Jeon HS, Hwang YJ, Min BK, Korean J. Chem. Eng., 33(3), 880 (2016)