N hexadecyltrimethoxysilane applications properties synthesis
On N-hexadecyltrimethoxysilane
First, the synthesis of N-hexadecyltrimethoxysilane
The synthesis of N-hexadecyltrimethoxysilane is an important matter in chemical preparation. The method usually uses hexadecylbromide and trimethoxysilane as raw materials, and is assisted by a catalyst in a suitable reaction environment. The catalyst can change the chemical reaction rate, but its own quality and chemical properties remain unchanged before and after the reaction. During the reaction, it is necessary to control the temperature and pressure to make the substitution reaction occur. If the temperature is too high, side reactions will easily occur; if the temperature is too low, the reaction rate will be slow. The pressure also needs to be adapted to ensure the smooth progress of the reaction. After delicate operation, the bromine atom is replaced by trimethoxysilyl group to obtain N-hexadecyl trimethoxysilane.
Second, the characteristics of properties
This compound has unique properties. From the perspective of physical properties, it is a colorless to light yellow liquid, which can exist stably at room temperature and pressure. It has a specific density, slightly lighter than water, and has a certain viscosity. Its solubility is also characteristic, soluble in common organic solvents, such as toluene, acetone, etc., but insoluble in water. Due to the molecular structure, cetyl is a long-chain alkyl group, which is lipophilic, while trimethoxysilyl is polar, but it is not enough to make it soluble with water. In terms of chemical properties, its siloxy group is active and can react with hydroxyl-containing substances to form stable siloxy bonds. This property is widely used in the field of material surface modification.
Third, the way of application
N-hexadecyltrimethoxysilane is widely used. In the field of material surface treatment, it can be used as a surface modifier. Coating it on the surface of the material, through chemical reaction, can change the surface properties of the material. If applied to inorganic materials, it can give it hydrophobicity, making it stable in humid environments and not easy to be eroded by water. In the coating industry, the addition of this compound can improve the adhesion of the coating to the substrate and enhance the weather resistance of the coating. Because it can react with the hydroxyl group on the surface of the substrate to form a stable bond, and its long-chain alkyl group can improve the flexibility and wear resistance of the coating. In the preparation of composite materials, as a coupling agent, it can improve the compatibility between the organic phase and the inorganic phase, so that the properties of the composite can be optimized, and the strength and toughness can be improved.
