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Fundamentals of Silane
2024-04-11
Silanes contain two different chemical functional groups, one end can react with hydroxyl groups on the surface of inorganic materials (such as glass fibers, silicates, metals and their oxides) to generate covalent bonds; the other end can generate covalent bonds with resins, so that the two properties are very different. The material is combined to improve the performance of the composite material. The silanization treatment can be described as a four-step reaction model:(1) hydrolysis of the three Si-OR groups connected to silicon into Si-OH;(2) dehydration condensation between Si-OH to form Si-OH-containing oligomeric siloxane;(3) formation of hydrogen bonds between the Si-OH in the oligomer and OH on the surface of the substrate;(4) formation of covalent bonds with the substrate accompanied by dehydration reaction during heating and curing.
In order to shorten the curing time required for the on-site use of the treatment agent, the silane treatment agent is first prehydrolyzed at a certain concentration before use.
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