1. Incorporation of hollow TiO2 microspheres in cement-based waterborne coatings for synergistic enhancement of thermal barrier and infrared reflective properties.
- Author
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Jia, Zhiqing, Lyu, Huanjun, Bao, Yunfeng, Qi, Xiaoqiang, and Guo, Siyao
- Subjects
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AERODYNAMIC heating , *THERMAL insulation , *THERMAL barrier coatings , *MICROSPHERES , *SURFACE coatings , *TITANIUM dioxide , *THERMAL properties - Abstract
Titanium dioxide hollow microspheres (HMS-TiO 2) were successfully synthesized through a sol-gel and subsequent high-temperature calcination method using a hard template. These microspheres exhibit an average particle size of about 13.66 μm and a shell layer thickness approximately 1.18 μm. Furthermore, the thermal insulation effect is evident in cementitious materials coated with an HMS-TiO 2 -based composite film. The maximum average near infrared (NIR) reflectance and thermal insulation temperature difference of these coated materials are 46.81 % and 9.3 ℃, respectively. Notably, the modified composite film displays excellent mechanical and impermeable properties when applied to the surface of cement mortar samples. These comprehensive results indicate that introducing HMS-TiO 2 with the synergy of structure and composition significantly enhances the thermal, mechanical, and durability properties of modified waterborne coatings on cement-based materials. This augmentation makes them well-suited for thermal insulation and heat preservation applications in building structures. • Micro-scale hollow TiO 2 was synthesized using a hard template method. • The synergy of structure and composition is crucial for cement coatings. • Hollow TiO 2 -based coatings show excellent thermal insulation properties on buildings. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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