Inorganic–organic hybrid pigment fabricated in the preparation process of organic pigment: Preparation and characterization

• Organic pigment is hybridized with SiO2/TiO2 to prepare hybrid pigment.
• The mixed coupling method is carried out in the preparation of organic pigment.
• Morphology and color performance of hybrid pigment can be adjusted.
• The hybrid improves the thermal and photo-stability of organic pigment.

Inorganic–organic hybrid pigments were fabricated by adding inorganic mixture of precipitated white carbon black (SiO2) and TiO2 in preparation process of C.I. Pigment Yellow 13 and 83 composite with a mixed coupling method. Effects of mass ratio of inorganic/organic, SiO2/TiO2 and coupling component on the morphology and structure, color performance, thermal- and photo-stability of hybrid pigments were systematically investigated. It was found that the SiO2 was firstly encapsulated by organic pigment to form a core–shell structure, and then combined with TiO2 through electrical adsorption. The morphology, particle size and distribution of hybrid pigments could be controlled by the mass ratio of inorganic/organic and SiO2/TiO2, and the color performance of hybrid pigments could be adjusted by the mass ratio of inorganic/organic and coupling component. Additionally, the hybrid pigment showed a better thermal- and photo-stability than organic pigment.