Supercritical drying technology is the earliest to achieve batch preparation of aerogel technology, which is relatively mature, and it is also the technology adopted by aerogel enterprises at home and abroad.

Supercritical drying is designed to achieve the critical point of the solvent during the drying process by pressure and temperature control, forming a supercritical fluid. The solvent in the supercritical state has no obvious surface tension, and the material can be avoided during the drying process. The shrinkage and fragmentation in the material, thereby maintaining the original structure and state of the material, preventing the agglomeration and coagulation of the primary nanoparticles, and preparing high-surface materials such as nanomaterials and aerogel materials. and preparing high-surface materials such as nanomaterials and aerogel materials.and preparing high-surface materials such as nanomaterials and aerogel materials.