The,structure,and,properties,b business, insurance The structure and properties of boron and boric acid
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With the economic developing and technologycontinuous improving, the car engine design to the development of miniaturized,high-power, high speed, and put forward higher requirements on the thermalstability of the engine oil additives perform their functions under theconditions of high temperature environment, followed by environmental factorsand the government announced regulations that restrict the use of certainadditives.In the past two decades, with theunderstanding of the physical and chemical properties of the element boron, scientistsfound that introduced boron powder to oillubricant additives can improve and enhance the anti-wear properties andthermal stability, the boron additives can better solve additives containingthe deleterious component and part of the metal for some restricted and reducedamount of oil function, the element boron gives oil energy saving andenvironmental protection.Some of the major produce additivesbusiness internationally, has developed boron-containing detergents, boron-containingdispersant and boron-containing anti-wear agents and a variety ofenvironmentally friendly, energy-saving modified products in the 1980s, 1990s, makeboron element widely used in the field of lubricating oil additives. China now is developedboron-containing dispersant and boron-containing extreme pressure and anti-wearagents and so on. Boron element is usually introduced by the use of boric acid andalkaline compound additive molecules, thus, boric acid, has become one of theimportant raw materials for lubricating oil additives.According to metal powder supplier, theatomic number of boron is 5, borons valence electron structure is 1S22S22P1,2S electron is easily to activate to 2P orbit, to become activation state1S12S12P2, form three unpaired electrons, boron covalent bonding orbital SP2,form six trivalent compounds of the electronic structure of the corner body. Prail is empty, the valence electrons of the boron atom is less than the numberof valence electron, in the bonding, the valence electrons is not full, theboron atom is an electron-deficient atom, an electron-deficient, thus having asignificant, easily formed multi-center key. A so-called multi-center bondrefers more atoms rely less electrons combine a covalent bond delocalization.For example, combined a pair of electrons with three atoms, is known as thethree-center two-electron bond.The chemical formula of boric acid is H3BO3.in the H3BO3 crystal, each B atom is three sp2 hybrid orbital and three O atomscombine into a flat triangular structure (flat triangles BO3 constitutes the B2O3,the basic structural unit of boric acid), each of the O atoms except for combinationa covalent bond with a B atom and an H atom, also through hydrogen bonds withanother H3BO3 unit in the H atom bonded together into the structure, betweenlayers of sheet layers by weak van der Waals force to attract. Boric acid issoluble in water, when heating, due to breakage of hydrogen bonding in thecrystal, the solubility increases.Source:http://www.mhcmp.com
The,structure,and,properties,b