Thermochromic pavement coating with automatic temperature regulation function and preparation method thereof

Abstract

The invention discloses a thermochromic pavement coating with an automatic temperature regulation function. The thermochromic pavement coating is prepared from the following raw materials in parts by mass: 18-30 parts of pigment and filler, 50-60 parts of a water-based silicone acrylic emulsion, 5-10 parts of various additives, 5-10 parts of a coalescing agent and 20-30 parts of deionized water, wherein the pigment and filler comprises the following components in parts by weight: 2-5 parts of titanium dioxide and 16-25 parts of thermochromic powder, wherein a mass ratio of the titanium dioxide to the thermochromic powder is 1: (4-10); the titanium dioxide is rutile type titanium dioxide; and the average particle size of the titanium dioxide is 0.2 [mu]m. The pavement coating disclosed by the invention can reflect more solar radiation under a high-temperature environment condition in summer, so pavement surface temperature can be effectively reduced; a pavement can absorb more solar radiation under a low-temperature environment condition in winter, so the situation that the pavement surface temperature is continuously reduced by a high-reflection coating under the low-temperature condition is avoided, and it is guaranteed that the pavement is at a proper temperature; and meanwhile, brightness before and after the color change of the coating is controlled in a medium-low brightness range, so the problems of glare, urban light pollution and the like caused by a light-color high-reflection coating can be effectively relieved.

Description

technical field [0001] The invention belongs to the field of pavement temperature regulation technology and materials, and relates to an organic reversible thermochromic coating with the function of pavement independent temperature regulation and a preparation method thereof. Background technique [0002] The surface temperature of asphalt pavement in summer is as high as 70-80°C. Under the action of driving load, it is easy to form diseases such as rutting, shifting, and wrapping, which threatens driving safety and greatly shortens the service life of asphalt pavement. In addition, the urban asphalt pavement affects the surrounding thermal environment due to the absorption of solar radiation, and also aggravates the urban "heat island effect". In winter, as the temperature decreases, brittle failure and cracking are prone to occur. [0003] The existing high-reflection cooling coatings with fixed colors can effectively reduce the road surface temperature in summer and alle...

AI Technical Summary

Problems solved by technology

[0002] The surface temperature of the asphalt pavement in summer is as high as 70-80°C. Under the action of traffic load, it is easy to form defects such as rutting, shifting, and wrapping, which threatens driving safety and greatly shortens the service life of the asphalt pavement.

In addition, the urban asphalt pavement absorbs solar radiation, affects the surrounding thermal environment, and aggravates the urban "heat island effect".

In winter, as the temperature drops, it is prone to brittle failure and cracking.

[0003] At present, the existing high-reflective cooling coating with fixed color can effectively reduce the temperature of the road surface in summer and alleviate the heat island effect. Make roads more icy and slippery

[0004] At present, there are reversible thermochromic pavement coatings. For example, the invention with application number CN201910701119.4 discloses the preparation method of reversible thermochromic pavement coatings. Thermochromic material, when prepared as a coating and applied on the road surface, it tends to be translucent in a light-colored state and has poor hiding power. In actual application, it can only be partially applied to the road surface in the form of a pattern

Images