Synthesis and characterization of plate-like titanate/cobalt blue pigment composites

Lu Yang, Xiangwen Liu, Takahiro Goto, Shu Yin, Tsugio Sato

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Plate-like titanate/cobalt blue pigment composite was successfully synthesized by mixing cobalt blue (CoAl2O4) pigment nanoparticles with plate-like lepidocrocite-type potassium lithium titanate (K0.8Li0.27Ti1.73O4, PLT) microparticles in water in order to improve the comfort and covering ability when applied on skin as cosmetics. PLT was synthesized by KCl flux method at 1000°C for 5 h using K2CO3, Li2CO 3 and TiO2 as starting materials, while CoAl 2O4 nanoparticle was synthesized by mixing Co(NO 3)2 · 6H2O and Al(NO3) 3 · 9H2O with the molar ratio of Co:Al 1:6 at pH 9 followed by calcination at 1000°C for 1 h. The morphology of the PLT/CoAl2O4 composite strongly depended on the solution pH. Since in a low pH solution, the surface of PLT was negatively charged, while that of cobalt blue was positively charged, CoAl2O4 nanoparticles were homogenously coated on the surface of PLT by electrostatic attraction force. PLT/CoAl2O4 composites obtained showed nice feeling, high flickering pearlescent, excellent UV-shielding characteristic and novel blue color.

Original languageEnglish
Article number1260018
JournalFunctional Materials Letters
Volume5
Issue number2
DOIs
Publication statusPublished - 2012 Jun 1

Keywords

  • Plate-like pearlescent material
  • blue color cosmetic materials
  • composite
  • multifunction

ASJC Scopus subject areas

  • Materials Science(all)

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