First, what is the material of silicone? Literally speaking, silica gel is a porous solid silica material with a large area. Silica gel is an amorphous substance and is a highly active adsorption material. Silica gel has many advantages compared with other similar materials, such as high adsorption performance and stable chemical properties [does not react with any substance except strong alkali and acid.] Good thermal stability, high mechanical strength, etc. Silica gel can be divided into large pore silica gel, B type silica gel, coarse pore silica gel, fine pore silica gel according to its pore size; According to its composition shape can be divided into extruded silica gel and molded silica gel; According to its nature and composition can be divided into organic silica gel and inorganic silica gel two categories.
  Second, the true and false identification of silicone from the feel, the toughness and elasticity of silicone products are very good, not easy to be affected by external forces and deformation, and the feel will be relatively smooth. The fake silicone products are easy to deform, and the feel is relatively rough, because the fake silicone surface does not have a layer of grease. In terms of characteristics, silicone products are non-toxic, tasteless, colorless products, good texture, no harm to the human body. And the general fake silicone is difficult to achieve these effects, fake and shoddy silicone products are generally toxic and pungent odor. At the same time, we can also put the true and false silicone through the flame burning is also very useful, fake silicone products in the burning of black smoke, the remaining material is black powder, real silicone products no matter what color when burning out white smoke, burning residue is white powder.
   Third,With the progress and development of modern science and technology, the use of silica gel in medicine will have broader prospects. Foam silicone rubber is made of condensed hydroxy-terminated silicone rubber, hydroxy-hydrogen-containing silicone oil as blowing agent, and vinyl platinum complex as catalyst [heating catalyst is dibutyl tin dilaurate]. A spongy elastomer with pores formed by foaming vulcanization at room temperature. In order to improve the quality of the foam, some other components should be added: such as silicone oil, so that the vulcanization process produces more gas, improve the feel of the foam and reduce the density. The addition of diphenylsilanediol can not only control the structure of the foam, but also control the viscosity of the adhesive in the storage process, but the amount can not be too much, otherwise it will affect the electrical properties of the foam. In order to improve the physical and mechanical properties of the foam, transparent silicone rubber can also be added. The amount of vinyl complex of catalyst chloroplatinic acid can not be too much, to the convenience of operation, otherwise it will increase the viscosity and is not conducive to operation.