The vacuum freeze dryer is suitable for drying high-grade raw materials, Chinese medicine pieces, biology, wild vegetables, dehydrated vegetables, food, fruits, chemicals, pharmaceutical intermediates and other materials.
Let me introduce the working principle of the vacuum freeze dryer:
After starting the machine, put the material into the material box for freezing. During the freezing process of the material, on the one hand, the vacuum system vacuumizes to take away a part of the water; on the other hand, when the material is frozen, the water contained in some molecules is discharged to the The surface of the material is frozen.
After meeting the freezing requirements, the heating system heats and dries the material, and the water contained in the material is brought to the freezing and collecting box by vacuuming to freeze, so as to meet the freezing and drying requirements of the material.
Freeze-drying refers to the process of removing moisture or other solvents from frozen biological products through sublimation. Sublimation refers to the process by which a solvent, such as water, like dry ice, changes directly from a solid state to a gaseous state without going through a liquid state.
The product obtained by freeze-drying is called lyophilisate, and the process is called freeze-drying. Traditional drying can cause the material to shrink, destroying cells.
The structure of the sample is not destroyed during freeze-drying because the solid components are supported by the solid ice in their place. As ice sublimates, it leaves pores in the dry leftover material.
This preserves the integrity of the product's biological and chemical structure and its activity. In the laboratory, lyophilization has many different uses, and it is indispensable in many biochemical and pharmaceutical applications.
It is used to obtain long-term storage biological materials, such as microbial cultures, enzymes, blood, and pharmaceuticals, which retain their inherent biological activity and structure in addition to long-term storage stability. To this end, lyophilization is used to prepare tissue samples for structural studies such as electron microscopy studies.
Freeze-drying is also used in chemical analysis to obtain samples in a dry state, or to concentrate samples to increase analytical sensitivity. Freeze-drying stabilizes the composition of the sample without changing the chemical composition, making it an ideal analytical aid.