First of all, we need to understand that aerogel is the solid material with the lowest thermal conductivity known. Its unique structure makes it have low thermal conductivity, be waterproof and fireproof, and be environmentally friendly and green. It is the best choice for insulation materials of pipelines and equipment and a revolutionary material for energy conservation and insulation. Aerogel insulation felt is a kind of flexible insulation felt made by combining nano-silica aerogel with inorganic fiber materials through a special process. For decades, people have been studying the outstanding performance of aerogel.
The main performance characteristics of aerogel insulation felt insulation materials: 
Thermal insulation: The long-term operating temperature can reach 650℃. The thermal insulation effect is 3 to 5 times that of traditional materials, achieving high efficiency and energy conservation. 
2. Durable heat resistance: The unique nano three-dimensional network structure offers excellent high-temperature stability, preventing the deformation and accumulation of traditional materials due to vibration and the sharp decline in insulation performance. 
3. Thinner insulation thickness: Only 1/2 to 1/5 of the thickness is needed to achieve the same insulation effect as traditional materials, with less heat loss and higher space utilization. 
4. Resistance to pressure, tension and cracking: It has good flexibility and tensile and compressive strength, can resist rough construction, and will not sink or deform over long-term use. 
5. Water resistance: It features excellent overall waterproof performance with a water repellency rate of ≥99%, effectively blocking liquid water while allowing water vapor to pass through. 
6. Sound insulation and shock absorption: While insulating the equipment, it can also serve to absorb sound, reduce noise, and buffer vibrations, thereby improving the environmental quality and protecting the equipment. 
7. Safety and environmental protection: It contains no substances harmful to the human body and has an extremely low content of soluble chloride ions. 
8. Easy to construct: Light and convenient, easy to cut, high construction efficiency, suitable for various complex shape requirements. 
The application of nano aerogel blankets in the refrigeration and freezing fields: 
Outstanding thermal insulation performance: As a new type of thermal insulation material, aerogel felt has excellent thermal insulation performance. When the test temperature is 25℃, its thermal conductivity is 0.018 w/m·k; at low temperatures, when the test temperature is -25℃, its thermal conductivity is only 0.015 w/m·k; while polyurethane (PU) has a thermal conductivity of 0.026 w/m·k at a test temperature of -25℃. Compared with VIP vacuum insulation panels, the dynamic thermal insulation effect of aerogel insulation materials is more outstanding and they can be recycled. Therefore, at low temperatures, to achieve the same thermal insulation effect, aerogel thermal insulation felt can use a thinner insulation thickness than polyurethane (PU). 
2. Exceptional durability: The unique nano three-dimensional network structure offers excellent thermal insulation stability, preventing the accumulation and deformation that traditional materials are prone to over long-term use, which would otherwise lead to a sharp decline in insulation performance. 
3. Excellent water resistance: The overall lotus leaf-like hydrophobic effect, with a hydrophobic rate of ≥99.6%, and outstanding overall waterproof performance. 
4. Excellent compressive, tensile and crack resistance: With superior physical properties, it can withstand rough construction and internal stress caused by alternating cold and heat. It will not sink or deform over long-term use. It is lightweight, easy to disassemble, has a short construction period, good air tightness and high space utilization. 
5. High-quality eco-friendly products: Aerogel insulation felt has stable chemical properties. During use, no harmful substances are released, nor will it decompose or mold. It has excellent corrosion resistance. In the production process, no harmful gases are produced. The production process also embodies the concept of environmental protection. The solid waste generated can be recycled and treated, making it a recyclable eco-friendly product. 
Due to the unique properties of aerogel blankets, since they moved from the laboratory to practical applications, new application fields have been continuously discovered and new products have emerged in an endless stream. The excellent performance in various aspects has made aerogel blankets stand out among many materials, but these characteristics are also double-edged swords. In the decades since aerogel blankets entered the market, aerogel fiberglass blankets have remained the most widely accepted products in the industrial field.