Aerogel Particles – The Unsung Heroes of Advanced Materials

Aerogel, also known as dry gel, is a kind of porous material (close to air density) that is filled with gas in a spatial network structure and has a very low solid density (near air density), obtained by chemical solution reaction, first forming a sol, and then gel, removing the solvent in the gel.

Aerogel Particles

S. Kistler originally named Aerogel in English as aerogel (flying solid). Since it successfully prepared SiO2 aerogel by supercritical drying method, aerogel is defined as the material “aerogel” obtained by supercritical drying of wet gel. With the emergence and development of atmospheric pressure drying technology in the middle and late 1990s, the generally accepted definition of aerogel was that no matter what drying method was used, as long as the liquid of wet gel was replaced by gas, and the network structure of gel was basically unchanged, the materials obtained in this way were called aerogel.

Aerogel is the lightest solid material known at present and also the material with the best thermal insulation performance so far. It has extensive and huge application value in many fields and is known as “the magic material that changes the world.”

Aerogel is a porous material with an internal network structure filled with gas and a solid surface with very low density. It is the lightest solid material at present. Its network structure is generally composed of cross-linked nanoparticles, where the pores inside the particles are mainly micropores, and the pores between particles are mostly mesopores or macropores at 2 nm.

Aerogel Particles

Properties and Applications of Aerogel Materials

Aerogel shows unique properties in mechanics, acoustics, thermology, optics and other aspects, among which the most prominent is thermal insulation performance. Due to its unique properties, aerogel materials have broad application prospects in aerospace, petrochemical industry, electric power metallurgy, ships and vehicles, precision instruments, ice box refrigerators, clothing tents, building energy conservation and other fields, and are revolutionary alternatives to traditional thermal insulation materials. With the transformation and upgrading of China’s economy, the continuous and vigorous promotion of energy conservation and consumption reduction policies, and the implementation of China’s nanomaterial strategy for many years, aerogel materials have received extensive attention from the government, academia, business and investment circles in recent years.

Development prospect of aerogel

At present, aerogel materials occupy the top part of the pyramid model of the entire thermal insulation material market, but their scale in the entire thermal insulation material market is almost insignificant, which indicates that the aerogel industry is still in its early stage of starting, and also indicates that its future development space is huge. At present, the biggest obstacle restricting the market expansion of aerogel is the high price. Once the production cost of aerogel materials is significantly reduced, the market scale will expand rapidly, and the sales volume of products will also expand rapidly, which will revolutionize the replacement of traditional thermal insulation materials.

Aerogel Particles

The superior thermal insulation and other properties of aerogel material make it have a relatively wide application value. It will become an important potential substitute in the field of existing thermal insulation materials and is one of the new materials vigorously promoted by the state. At present, China the United States and other technology giants in the field of aerogels belong to the first echelon, providing a good competitive environment for the industrialization of China’s aerogels, and the domestic market has a large development space.

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