Amazing Aerogel Material
Thermal insulation, thermal insulation, lightweight, aerogel material to meet the requirements of building energy conservation, in line with the development trend of building lightweight.
Aerogel has the characteristics of large specific surface area, high porosity and small particle size. Due to the special physical structure of aerogel, it has strong fire and heat insulation properties, and can be widely used in the field of construction, and has a good development prospect in the field of building energy conservation.
The density of aerogel material is between 0.16 and 4.0kg/m³, which is much lower than that of other materials, in line with the development trend of lightweight construction. In addition, the aerogel material also has the advantages of fire, sound insulation, corrosion resistance and so on.
Application of Aerogel in Building Energy Saving Field
1. Aerogel powder can be used for interior wall coating, as a supplement to structural insulation measures, not only for the insulation of the interior wall of the building, but also for external wall and roof insulation.
Internal wall insulation is an important part of building insulation engineering, but it is often easy to be ignored, and the internal heat is diffused through the inner wall and transferred to the outside. The thermal insulation of the inner wall needs to meet the most basic thermal insulation requirements, but also has the fire protection function, and pollution-free materials should be selected. The use of aerogel insulation board can improve the insulation and sound insulation effect, and can also meet the fire protection needs of withstand more than 400 ° C. Aerogel powder can be used for interior wall coating, as a supplement to structural insulation measures, not only for the insulation of the interior wall of the building, but also for external wall and roof insulation.
2. Adding aerogel with low thermal conductivity to traditional mortar and concrete can effectively improve material performance.
Aerogel insulation mortar is made of Portland cement as gelling agent, adding aerogel, SiO₂, glass beads. The size of the glass beads is much larger than the aerogel particles, which can be filled into the mortar matrix. The smaller aerogel particles will further fill the gap, so that the porosity is reduced as much as possible, and the thermal conductivity of the thermal insulation mortar will also decrease, so that the expected building insulation effect can be obtained. It can be seen that the aerogel insulation mortar can block the heat and improve the overall insulation and energy saving effect of the building structure. After adding aerogel to concrete, the weight and thermal conductivity of concrete are significantly reduced, but it will also damage the mechanical strength of concrete, so aerogel concrete should be avoided in load-bearing walls.
3. The use of aerogel glass can improve the insulation effect, reduce the impact of solar radiation, and meet people’s needs.
Aerogel glass usually reduces the heat transfer coefficient of the glass in the form of hollow, vacuum and sandwich, and can improve the noise reduction ability. The energy saving effect of aerogel glass is obvious, in hot summer and cold winter areas, aerogel glass can weaken solar radiation in summer and reduce heat loss by about 20%. In winter, aerogel glass can block about 40% of the indoor hot air, which has good energy saving value. At this stage, there are two main types of aerogel glass, one is laminated glass and the other is coated glass. Laminated glass consumes more aerogel, and the corresponding cost is higher. In contrast, the price of using coated glass is much lower than laminated glass, and the thermal insulation performance is good, up to 88% light transmittance, and will not affect indoor lighting.
4. In the water heater storage tank, collector, pipeline and other parts of the application of aerogel materials, heat loss can be reduced by less than 30%.
The application of aerogel materials in rooftop solar collectors has a long history, mainly used in the thermal insulation device of solar water heaters. The application of aerogel materials in the water tank, collector, pipeline and other parts of the water heater can increase the heat collection efficiency by at least 1 times compared with ordinary solar water heaters, and the heat loss can be reduced by less than 30% compared with the past.
Aerogel felt is an ideal insulation material because of its remarkable characteristics of hydrophobicity and heat insulation. The pipe can be wrapped with aerogel felt as the main insulation layer of the insulation structure, and the metal protective layer as the second insulation measure can protect the aerogel insulation layer. When multilayer aerogel felt is wrapped, the cross-overlapping method can be used to enhance the insulation performance.
5. Aerogel thermal insulation material is A class non-combustible material, which can be used for building fire protection structure.
Aerogel concrete composite wall is a lightweight insulation wall material made of aerogel filled and modified lightweight aggregate. Aerogel-filled expanded perlite can be prepared by filling it with aerogel-expanded perlite and used as lightweight aggregate to form a new type of thermal insulation material. The aerogel structure is mainly a porous network, which can cover the surface of the steel structure with aerogel thermal insulation composite material to extend the burning time without producing toxic substances. At the same time, aerogel material can hinder the spread of fire, is A class non-combustible material, can be used for building fire structure.
