Silane coupling agent is a compound containing silicon in the same molecule that can interact with both organic and inorganic materials.
X: Hydrolytic functional group
Such as: Cl, OCH3, OC2H5, OOCR (acyl oxygen), NR, etc.
R: organic functional group
Such as: vinyl, epoxy, amino, methyl acryloxy, sulfhydryl, anhydride, alkyl, halogen and so on.
Types of organic functional groups of silane coupling agent:


Principle of action of silane coupling agent
Model of inorganic surface action mechanism
Silanes form monolayer models on inorganic surfaces
(1) Hydrolytic functional groups are hydrolyzed to Si-OH;
(2) The oligomers containing -OH were formed by condensation reaction between Si-OH;
(3) The oligomers containing -OH form hydrogen bonds with the surface of inorganic substrate;
(4) The condensation of oligomer -OH and inorganic surface -OH by heating and dehydration.


Theoretically, the silane coupling agents react in a certain sequence, but these reactions can occur simultaneously after the initial hydrolysis step. At the interface, there is usually only one bond between each silicone of organosilane and the substrate surface, and the remaining two silanol groups exist in condensed or free form. Organic groups can still be used for covalent reactions or physical interactions with other substances.


More information, please refer to the following website: silane,phenyl silane,amino silane,vinyi silane,epoxy silane,alkyl silane,chloro silane,acyl silane (iotasilane.com)


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