Excuse me, is PU one kind of silicone? Or what is the connection between the two?
First of all, PU does not belong to silica gel, and PU refers to polyurethane. It is a kind of macromolecule material which is made up of organic diisocyanate or polyisocyanate and two hydroxyl or polyhydroxy compound. And silica gel is a common organic silica gel. The basic structure of organic silica gel is made up of silicon oxygen link, and the side chain is connected with other organic groups through silicon atom. So, these are two very different materials that make up the system. But because of the wide application of the two, they intersect in some application fields.
PU is the abbreviation of Polyurethane, Chinese name is polyurethane, referred to as polyurethane. Because of the simple modification of the formula, different density, elasticity, rigidity and other physical properties can be obtained. At present, a large number of glass fiber insulation materials, wood, traditional rubber products and so on.
Silica gel (Silica gel; Silica) alias: silicone rubber is a highly active adsorption material, belongs to amorphous material, its chemical formula is mSiO2. NH2O. Insoluble in water and any solvent, non-toxic, tasteless, chemical stability, in addition to strong alkali and hydrofluoric acid, do not react with any substance. Different types of silica gel have different microporous structures because of their different manufacturing methods. The chemical composition and physical structure of silica gel determine that it has many characteristics which are difficult to be replaced by other similar materials: high adsorption properties, good thermal stability, stable chemical properties, high mechanical strength, etc.. According to the size of the pore size, silica gel is divided into large pore silica gel, coarse pore silica gel, B type silica gel and pore silica gel.
