How is Nanoparticle Silica Aerogel SiO2 Aerogel produced?
The main process of preparing silica aerogel includes three parts:
Sol-gelation process: the sol is obtained through the precursor reaction of the silicon source, and then a catalyst is added to cause pulverization and condensation to obtain a wet gel.
Aging of gel: The wet gel is allowed to stand foraging in the mother liquor to improve its mechanical strength and stability
Drying process: The liquid dispersion medium in the gel must dry the gas from the holes to form a silica aerogel.
More durable aerogels, with higher strength and stiffness, can be obtained by a suitable selection of silane precursors, and they can be combined with different organic polymers or different optical fiber networks to build inorganic silica on the internet. Recent studies have shown that adding a flexible organic polymer to the hydroxyl groups on the surface of silica gel will be an effective mechanical reinforcement method for silica aerogels. If appropriate functional groups are introduced into the surface of silica aerogel and then copolymerized with appropriate organic monomers, a more versatile polymer enhancement method can be easily realized. Mechanically reinforced silica aerogel has a very open texture and can be used as an excellent thermal insulation material for various industrial and aerospace applications.
Technical Parameter of Nanoparticle Silica Aerogel SiO2 Aerogel:
Product Name | Specific Surface Area | Bulk Density | Particle Size | Porosity % | Aperture | Color |
Silica Aerogel | 600-800 m2/g | 40-60 kg/m3 | 15-50nm | 90-95 | 20-50nm | White |
Application of Nanoparticle Silica Aerogel SiO2 Aerogel:
Silica aerogel has aroused great interest in science and technology due to its low bulk density (up to 95% of its volume is air), hydrophobicity, low thermal conductivity, high surface area, and optical transparency, and it has many applications.
Silica aerogel is a light and highly porous material with a three-dimensional network of silica particles, which can be obtained by extracting the silica gel liquid phase under supercritical conditions. Due to their outstanding characteristics, such as extremely low thermal conductivity, low density, high porosity and high specific surface area, they are used in aviation/aerospace and terrestrial thermal insulation systems, environmental cleaning and protection, heat storage devices, transparent window systems, Thickener in paint, etc.
More durable aerogels, with higher strength and rigidity, can be obtained by the appropriate selection of silane precursors, and they can be combined with different organic polymers or optical fiber networks to construct an inorganic silica network. Recent studies have shown that adding flexible organic polymers to the hydroxyl groups on the surface of silica gel will be an effective mechanical reinforcement method for silica aerogels. If appropriate functional groups are introduced into the surface of silica aerogel and then copolymerized with appropriate organic monomers, a more versatile method of polymer reinforcement can be easily realized. Mechanically reinforced silica aerogel has a very open texture and can be an excellent thermal insulation material for industrial and aerospace applications.
Silica aerogel is a typical thermal insulation material, usually used to improve the thermal performance of onshore and offshore industrial infrastructure and buildings.
Silica aerogel can be used in imaging equipment, optics, and light guides. Materials used for filtration due to high surface area and porosity can be used to remove heavy metals. Thickener in certain paints and cosmetics. As an integral part of the energy absorber.
Aerogels also have many uses in space exploration. It is used in Russia's Mir space station and the US Mars Pathfinder probe. Aerogel is also used as a detector for the Cherenkov effect in particle physics experiments. In the Belle experimental detector at the B Meson plant of the High Energy Accelerator Research Institute, its latest application is a particle discriminator named Airgel Cherenkov Counter (ACC). The aerogel used in the detector has lower refractive index characteristics between liquid and gas. It has better light transmittance and solid-state characteristics than traditional methods using cryogenic liquid or high-pressure air. At the same time, its lightweight is also one of its advantages.
Silica Aerogel SiO2 Properties |
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Other Names | Silica Aerogel, SiO2 Aerogel, Aerogel. |
CAS No. | N/A |
Compound Formula | SiO2 |
Molecular Weight | 60.09 |
Appearance | Translucent solid |
Melting Point | 1200 °C |
Solubility in water | N/A |
Density | 0.1 g/cm3 |
Purity | 90-95 |
Particle Size | N/A |
Boling point | N/A |
Specific Heat | N/A |
Thermal Conductivity | N/A |
Thermal Expansion | N/A |
Young's Modulus | N/A |
Exact Mass | N/A |
Monoisotopic Mass | N/A |
Silica Aerogel SiO2 Health & Safety Information |
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Safety Warning | Danger |
Hazard Statements | H350-H373 |
Flashing point | N/A |
Hazard Codes | N/A |
Risk Codes | N/A |
Safety Statements | N/A |
RTECS Number | N/A |
Transport Information | NONH |
WGK Germany | N/A |