Supercritical drying is heat the drying medium to supercritical point, so that the gel removal solvent does not have capillary force, avoiding the removal solvent causing structure collapse, and get the drying technology that maintaining aerogel original characteristics. Making by the sol-gel process, there is a large amount of solvent (alcohol, water and catalyst) around the solid skeleton of aerogel . In order to obtain the aerogel, it is necessary to remove the solvent present in the aerogel. Using supercritical drying technology, need high temperature and high pressure conditions, the equipment is complex and dangerous. Therefore, in order to minimize the risk in this process, people develop a low-temperature supercritical drying technology in recent years , CO2 will not burn and explosion, the environment will not produce pollution, and its chemical inertness makes the product more purer. Using CO2 as a drying medium (critical temperature is only 31 ℃) for the low temperature supercritical drying technology, it can reduce the pressure, temperature and risk , achieving to dry the angerel. Van Bommel uses this technology to invent SiO2 aerogel successfully.
+ 86 13343846969
Room 1312, Shenglong Plaza, Zhengdong New District, Zhengzhou City, Henan Province, China.