Aerogel is one of the lightest solid materials known to date. It exhibits unique properties in mechanics, acoustics, thermology, optics and many other aspects, and is widely used in numerous fields such as aerospace, military, communication, medicine, building materials and electronics

And its huge application prospects are called "the magical material that changes the world".

Aerogel is one of the materials with the best thermal insulation performance to date. Its pore size is lower than the average free path of air molecules at normal pressure, so in aerogel

The air molecules in the voids are approximately stationary, thus avoiding convective heat transfer of the air. The extremely low bulk density of aerogel and the curved paths of its nanonetwork structure also prevent heat conduction between the gaseous and solid states. The "infinite number" of void walls can minimize thermal radiation. The combined effect of these three aspects almost blocks all the pathways of heat transfer, enabling aerogel to achieve an unparalleled thermal insulation effect compared to other materials. Its thermal conductivity is even lower than that of static air at room temperature, which is 0.025 W/ (m·K), reaching 0.013 to 0.016 W/ (m·K). Fumed silica, as a high-temperature resistant inorganic nanomaterial, has a primary particle size at the nanometer level and a well-developed pore structure. Should be

It is used for thermal insulation materials and can form a large number of independent and sealed thermal insulation units in a certain volume space, effectively preventing heat transfer. This has a similar thermal insulation method to aerogel. The preparation of thermal insulation coatings by mixing aerogel and fumed silica also has a good thermal insulation effect. Meanwhile, due to the nanostructure of fumed silica, it can enhance the strength of thermal insulation coatings, adhesion to the substrate and other properties, and effectively reduce the cost of raw materials. This article attempts to add fumed silica to the aerogel thermal insulation coating, with the aim of

To explore its influence on the thermal insulation performance and coating performance in thermal insulation coatings.