Mechanochemical synthesis of multifunctional kaolin@BiVO₄ hybrid pigments for coloring and reinforcing of acrylonitrile‐butadiene‐styrene

Abstract

Clay mineral-based inorganic pigments have been successfully applied for synchronous coloring and reinforcing requirements of plastic products owing to excellent environmental stability and weather resistance compared with organic dyes. In order to improve the common solid or liquid-phase preparation process of clay mineral-based inorganic pigments, kaolin@BiVO 4 hybrid pigments were fabricated by a cleaner mechanochemical method followed by annealing process for coloring and reinforcing of acrylonitrile-butadienestyrene (ABS) resin. Kaolin@BiVO 4 hybrid pigments calcined at 500 C presented the optimum chroma (L * = 77.45, a * = À1.88, b * = 81.93, C * = 81.95, and h= 91.32), and kaolin@BiVO 4 hybrid pigments modified with 3-methacryloxypropyltrimethoxysilane exhibited the good coloring properties in ABS matrix due to the improvement of surface/interfacial compatibility between pigments and ABS. Moreover, the tensile strength and bending strength of ABS composites containing 0.5 wt% of the modified kaolin@BiVO 4 hybrid pigments increased by 10.2% and 20.2% compared with that of the pure ABS, respectively. In addition, incorporation of kaolin@BiVO 4 hybrid pigments also contributed to improving the UV-aging resistance of ABS. Therefore, the as-prepared kaolin@BiVO 4 hybrid pigments based on the cleaner mechanochemical preparation process can be served as promising multifunctional fillers of polymer matrix due to the synergistic effect between kaolin and BiVO 4 pigments.