A facile approach to fabricate bright blue heat-resisting paint with self-cleaning ability based on CoAl2O4/kaolin hybrid pigment

• Published in: Applied clay science Vol. 160; pp. 153 - 161
• Main Authors: Zhang, Anjie, Mu, Bin, Hui, Aiping, Wang, Aiqin
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2018
• Subjects: CoAl2O4; Heat resisting paint; Hybrid pigments; Kaolin; Self-cleaning; CoAl2O4; Self-cleaning; Hybrid pigments; Kaolin; Heat resisting paint
• ISSN: 0169-1317; 1872-9053
• DOI: 10.1016/j.clay.2017.12.004

A bright blue and low-cost heat resisting paint with excellent self-cleaning ability was prepared by adding superhydrophobic CoAl2O4/kaolin hybrid pigment (K-HP). Kaolin (K) was served as a suitable matrix for anchoring CoAl2O4 nanoparticles to prepare K-HP, and then it was modified with hexadecyltrimethoxysilane to construct the superhydrophobic hybrid pigment based on the rough structure of K-HP. The sprayed coating of the superhydrophobic heat-resisting paints exhibited the good self-cleaning performance with high water contact angle of 164.3 o and low sliding angle of 1.2 o below 380°C, as well as the excellent color properties (L*=41.72, a*=−3.01, b*=−62.93) and thermal stability even at 800°C. Incorporation of K-HP not only improves the thermal stability of the heat-resisting paint, but also effectively protects steel plate substrate from damage during the calcining process. Therefore, it is expected to provide a facile approach to fabricate the chromatic self-cleaning heat-resisting paint with excellent thermal stability. [Display omitted] •Superhydrophobic CoAl2O4 hybrid pigment was prepared based on its rough surface.•Hybrid pigments exhibited high water contact angle and low sliding angle.•The obtained paint presented good self-cleaning and excellent weathering properties.•Superhydrophobic heat-resisting paint could be sprayed on various substrates.