Abstract 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.

中文翻译：

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一种基于CoAl 2 O 4 /高岭土混合颜料制备具有自清洁能力的亮蓝色耐热涂料的简便方法

摘要 通过添加超疏水性CoAl2O4/高岭土杂化颜料(K-HP)，制备了一种具有优异自洁能力的亮蓝色、低成本耐热涂料。高岭土（K）作为合适的基体用于锚定CoAl2O4纳米颗粒制备K-HP，然后用十六烷基三甲氧基硅烷对其进行改性，构建了基于K-HP粗略结构的超疏水杂化颜料。超疏水耐热涂料的喷涂涂层表现出良好的自洁性能，在380°C以下具有164.3 o的高水接触角和1.2 o的低滑动角，以及优异的颜色性能（L*= 41.72， a* = − 3.01, b* = − 62.93) 并且即使在 800 °C 下也具有热稳定性。K-HP的加入不仅提高了耐热涂料的热稳定性，还能有效保护钢板基体在煅烧过程中不受损伤。因此，有望为制备具有优异热稳定性的彩色自洁耐热涂料提供一种简便的方法。