Silicon coated nano-titanium dioxide and preparation method thereof and reflective heat-insulation coating

Abstract

Provided are silicon coated nano-titanium dioxide and a preparation method thereof and a reflective heat-insulation coating. According to the silicon coated nano-titanium dioxide, silicon oxide hydrates are bonded to the surfaces of titanium dioxide nanoparticles in a hydroxyl mode, a layer of silicon oxide surface solid film is formed on the surfaces of the titanium dioxide nanoparticles, silicon oxide is not prone to being subjected to chemical erosion, and good dispersity is achieved. The silicon coated nano-titanium dioxide can be prepared through the preparation method, the reflective heat-insulation coating contains the silicon coated nano-titanium dioxide, the formed coating is stable in performance, even in sunlight reflection, most of sun heat can be reflected, and an excellent reflective heat-insulation effect is achieved.

Description

technical field [0001] The invention relates to the field of coatings, more specifically, to a silicon-coated nano-titanium dioxide, a preparation method thereof, and a reflective heat-insulating coating containing the silicon-coated nano-titanium dioxide. Background technique [0002] Building a resource-saving society has become a new development trend at this stage. Therefore, it is of great significance to develop reflective heat-insulating and energy-saving coatings with stable and excellent performance. With the promulgation of building energy-saving standards, new materials with low energy consumption and good thermal insulation performance have become mainstream products. In our country, every summer, people consume staggering electricity for cooling. This not only increases the power load, but also causes a large amount of greenhouse gas emissions, which intensifies the urban heat island effect. When used in buildings, the heat-reflecting heat-insulating coating c...

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Problems solved by technology

[0003] Although the total solar reflectance (TSR) of the resin base material in the coating film formed by different coatings is different, the difference is not large. Therefore, the resin base material has little effect on the TSR of the coating film, while the coating film Different varieties of pigments (including extender pigments) have different reflectivity to solar energy. White pigments are the best infrared reflective pigments. While fully reflecting visible light, they also strongly reflect infrared light. Titanium dioxide") has a TSR of at least 75%. The high reflectivity of nano-titanium dioxide to sunlight makes it widely used in reflective heat-insulating coatings. Agglomeration, and because of its hydrophilic and oleophobic properties, it is difficult to disperse in the organic polymer resin base material, so that the nano-titanium dioxide is uneven in the coating film, and the excellent reflective performance of the nano-titanium dioxide cannot be fully utilized, resulting in the reflection of the reflective heat insulation coating. And heat insulation effect is not good, energy-saving effect is limited

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