What changes will aerogel bring to us?
2019-06-20 09:51:29 From: Tradematt-Aerogel
Aerogel is a solid gel material with a porous network structure with internal pores filled with air. Professor Kistler of the United States obtained silica aerogel for the first time under supercritical drying conditions by sol-gel method with water glass. There are many kinds of aerogels, of which SiO2 aerogel is the most common, translucent light blue, and the quality is ultra-light like "solid smoke". As a typical porous material, SiO2 aerogel is filled with air (or other gas) in most of its interior space, and its skeleton is only 0.15% to 15% of the total volume. The aerogel has an average pore size of about 25 nm, and the air molecules (free path 50-70 nm) cannot move freely in between. In addition, there are many closed holes in the aerogel skeleton with different sizes of "dead end", which increases the aerogel. The path of solid heat transfer, so the aerogel is a poor conductor of heat.
Aerogel material application examples
1. Insulation material (thermal insulator)
(1) Pipe insulation, volatile or flammable materials storage and transportation. The most widely used aerogel materials are in the field of furnace line insulation, heat plant pipeline insulation, and liquefied natural gas storage tanks.
(2) Textiles and clothing keep warm
In the early twentieth century, aerogel blankets began to appear. Tradematt fills the wet gel into the needle-punched fiber blanket and produces the aerogel composite blanket through supercritical drying technology; around 2010, Hugo successfully launched an aerogel jacket and successfully launched it; Aerogel insoles and sleeping bags (lining materials) were also given a very high rating.
(3) Building materials, refrigerators, etc. Aerogel materials can be used to insulate the roof or glass of a house. Aerogel glass has a very low thermal conductivity and can be used for energy saving. In addition, the currently used fluorine-refrigerated refrigerators or polyurethane foams produce chemicals that destroy the ozone layer, so the use of aerogels is also more environmentally friendly.
2. Aerospace field
Aerogel materials are also widely used in aerospace applications, such as Mars probes, naval diving suits, and space suits.
3. Application of aerogel in other fields
The aerogel adsorption can be used to make gas masks or to control the pollution caused by oil body leakage, and also used in filters, fuel storage and the like. In addition, aerogels can also be used as template materials.