Organic silicon, that is, organic silicon compounds, refers to the si-O bond, and at least one organic group is directly connected with the silicon atom compound, is also used to those through oxygen, sulfur, nitrogen, such as organic group and silicon atom connected to the compound is also regarded as organic silicon compound. Among them, polysiloxane composed of silicon-oxygen bond (-Si-0-Si-) as the skeleton is the most in the number of organosilicon compounds, the deepest research, the most widely used, accounting for more than 90% of the total amount.
Organosilication studies the properties and reactivity of organosilicon compounds. Organosilicon compounds are organic compounds containing carbon - silicon bonds. Like carbon, organosilicon has a tetrahedral structure.
In biomolecules, no compounds containing carbon - silicon bonds have been found. The first organosilicon compounds were discovered in 1863 by French chemist Friedel C and American chemist Crafts J.
They reacted silicon tetrachloride with zinc diethyl to make tetraethyl silicon. Simple silicon carbide is an inorganic compound.
In recent years, the consumption of organic silicon in China has maintained an average annual double-digit growth rate and has become the world's second largest consumer after the United States.
Organic silicon is an important part of the new chemical materials industry, is The State Council proposed seven strategic emerging industry development of the important basic materials, with many other chemical materials irreplaceable role, is worthy of the name of the "industrial vitamin" and "catalyst for science and technology".
China's organic silicon industry has become a high-tech industry with numerous production enterprises, complete product categories, high correlation with other industries, huge development potential and market prospects. At present, the production technology level of organic silicon monomer has approached the international advanced level. Based on domestic technology, the production capacity of organic silicon monomer in China has expanded rapidly in recent years. At present, China's organic silicon upstream products (organic silicon monomer) have been basically saturated, and the main downstream products basically meet the market demand.
Data from Zhiyan Data Research Center show that In the world silicone industry chain, China is not only the main supplier of upstream raw materials, but also the most important downstream product market. As the leading enterprise in the domestic silicone industry, Bluestar Group actively implements the strategy of "going out", and acquires the silicone business of Rhodia In France, and becomes one of the world's five largest silicone enterprises. China's silicone industry is gradually changing from a resource country, a market country to an industrial country.
Organosilicon materials have unique structures:
(1) The high energy polysiloxane main chain is shielded by sufficient methyl groups on Si atoms;
(2) C-H is non-polar, resulting in very weak intermolecular interaction force;
(3) Si-O bond length is long, Si-O-Si bond Angle is large.
(4) Si-O bond is a covalent bond with 50% ionic bond characteristics (covalent bond has directivity, ionic bond has no directivity).
Because of organic silicon unique structure, with the performance of the inorganic materials and organic materials, with low surface tension, small viscosity-temperature coefficient, high compressibility and high gas permeability basic properties, and has high and low temperature resistance, electrical insulation, resistance to oxidation stability, weather resistance, flame retardant, hydrophobic, corrosion resistance, non-toxic, tasteless, and physiological inertia and other excellent properties, Widely used in aerospace, electronics and electrical, construction, transportation, chemical, textile, food, light industry, medical and other industries, where silicone is mainly used in sealing, bonding, lubrication, coating, surface activity, demoulding, defoaming, foam suppression, waterproof, moisture-proof, inert filling, etc.. With the continuous growth of the number and variety of organosilicon, the application field is constantly broadening, forming a unique and important product system in the field of new chemical materials, many varieties are irreplaceable and essential to other chemicals.