Airgel insulations: excellent energy-saving insulating material
Aerogels is a singular material having a heat insulating acoustic performance. It has been around for 70 years (1931 invention). It is light silicic amorphous material formed after the liquid component of the gel is substituted with a gas. Which is a porous three-dimensional network structure form, wherein the solid volume of only 3%, the remaining 97% of the volume is composed of extremely fine nanoporous air, room air movement is small, thus suppressing the convection heat transfer and the gas phase. These properties make aerogels become the world\’s lowest density solid and most effective thermal insulation material. For decades, people have high performance airgel were studied. Airgel insulation performance, although excellent, but because of its brittleness great, not a long time to get practical. 70 years later, the American company Aspen Aerogels has developed a technically and economically viable airgel insulation products. The company uses the unique process aerogels and a carrier (fibrous mat) composite integrally formed sheet-like flexible and durable high performance insulations, and successfully commercialized. Material Properties 1. Thermal properties * is the lowest thermal conductivity of the heat insulating material in all industries. * good insulating performance 2-8 times higher than conventional materials, the quality of the available lighter, smaller size or smaller thickness to obtain the same or better insulating effect. – a very wide temperature range (-200 ℃ ~ 600 ℃). Physical properties 2. · excellent in water repellency, water without sacrificing performance. fine · flame retardant, the flame does not spread, no fuming. good · acoustic performance, good damping properties. * soft, bendable. Due to the form of a sheet, it can be wound cloth-like, and thus does not occupy space, to facilitate shipping and construction. · good resilience, even under pressure 7Mpa can also rebound. * can withstand high shock loads, no damage, no loss of performance. 3. RingThe environmental performance · No chemical hazards to the environment. It is a group of silicon oxide, and silicon oxide is sand. Such insulation products contain respirable fibers, the blowing agent is not used, and therefore free of chlorofluorocarbons and hydrochlorofluorocarbons. · Production processes consume little energy. · aerogels are classified as non-irritating substances, does not support mold growth.