Is organic silica gel toxic? (1)


Many people will ask this question, and it is normal to have doubts, because organic silica gel is widely used, and many daily necessities will have traces of it, such as baby's pacifier, which is related to the safety of the baby, and parents will be very concerned about it. Now let me tell you, don't worry, organic silica gel is the most environmentally friendly and safe product without any harm to people.






Organosilicon compound refers to the compound containing Si-C bond and at least one organic group is directly connected with silicon atom. Traditionally, those compounds that connect organic group with silicon atom through oxygen, sulfur, nitrogen, etc. are also regarded as organosilicon compounds. Among them, polysiloxane, which is composed of siloxane (- si-0-si -) as the skeleton, is one of the most widely studied organosilicon compounds, accounting for more than 90% of the total amount.






Silicone materials have unique structure:






(1) the main chain of polysiloxane with high energy is shielded by sufficient methyl group on Si atom;






(2) C-H has no polarity, which makes the intermolecular interaction very weak;






(3) the length of Si-O bond is longer and the angle of Si-O-Si bond is larger.






(4) Si-O bond is a covalent bond with 50% ionic bond (covalent bond has directionality, ionic bond has no directionality).






Due to its unique structure and the properties of inorganic and organic materials, organosilicon has the basic properties of low surface tension, small viscosity temperature coefficient, high compressibility, high gas permeability, etc., and has excellent properties of high and low temperature resistance, electrical insulation, oxidation stability, weather resistance, flame-retardant, hydrophobic, corrosion-resistant, non-toxic and tasteless, and physiological inertia, which are widely used in aviation Among them, organosilicon is mainly used in sealing, bonding, lubrication, coating, surface activity, demoulding, defoaming, foam suppression, water-proof, moisture-proof, inert filling and other industries. With the continuous growth of the number and variety of organosilicon, the application field is expanding, forming an important product system in the field of new chemical materials, many varieties are necessary for other chemicals. Organosilicon materials can be classified into silane coupling agents (organosilicon chemical reagents), silicone oil (silicone grease, silicone emulsion, silicon surfactant), high temperature vulcanized silicone rubber, liquid silicone rubber, silicone resin, composite material and so on.


Transferred from global organosilicon network