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What are the main uses of N-Octadecyltrimethoxysilane?
N-octadecyl trimethoxysilane has a wide range of uses. In the field of material surface modification, this material can show great skills. The cover can form a special siloxane base film on the surface of the material, thereby greatly improving the surface properties of the material.
In the hydrophobic field, if it is applied to the surface of the material as a treatment agent, the material can achieve excellent hydrophobic effect. If used in building exterior wall materials, it can make it difficult for rainwater to adhere, so it can effectively resist the erosion of water and prolong the service life of building materials, just like putting a strong waterproof armor on the building.
In the paint industry, it also has extraordinary performance. Adding an appropriate amount of N-octadecyl trimethoxysilane can enhance the adhesion between the paint and the substrate. After the paint is applied to the surface of the object, it can adhere more firmly and is not easy to peel off. It is like building a tough protective fortress on the surface of the object. At the same time, it can optimize the wear resistance of the paint and make the protective function of the paint more powerful.
In the plastics industry, this substance can also play an important role. The addition can improve the processing performance of plastics, make plastics smoother in the molding process, reduce the processing difficulty, and improve the surface gloss of plastic products, making their appearance more beautiful, just like giving plastic products a delicate makeup.
What are the physical properties of N-Octadecyltrimethoxysilane?
N-Octadecyl trimethoxysilane is one of the organosilicon compounds. Its physical properties are considerable and are described below.
In terms of its appearance, under room temperature, it is often a colorless to light yellow transparent liquid, clear and free of impurities. The light can be seen from people, and the appearance is quite textured.
When it comes to density, it is between 0.88 and 0.90g/cm ³. It is lighter than water. When placed in water, it will float on the water surface, like a light boat on the water.
Boiling point is also an important physical property. Its boiling point is quite high, about 234-236 ° C. Due to the existence of a certain interaction force between molecules, it needs to supply more energy to make it boil.
In terms of solubility, this compound is soluble in common organic solvents, such as toluene and xylene, which can be uniformly dispersed, just like a fish entering water, fusing seamlessly. However, in water, its solubility is not good. Because of its molecular structure, the hydrophobic octadecyl group accounts for a large proportion, so its affinity with water is weak.
Volatility is relatively low. In the environment of normal temperature and pressure, the rate of its molecules escaping from the liquid surface is slow, and it can remain in the system for a long time, and its properties are quite stable.
Surface tension is also its significant characteristic. Due to its special molecular structure, it can effectively reduce the surface tension of liquids, making liquids easier to spread out, like spring breeze and rain, moisturizing things silently.
In summary, N-octadecyl trimethoxysilane has unique physical properties and has important application value in many fields, which cannot be ignored in chemical materials.
Is N-Octadecyltrimethoxysilane chemically stable?
The chemical properties of N-octadecyl trimethoxysilane are still stable. Among this substance, the trimethoxysilyl group can be hydrolyzed to form a silanol group, which can be combined with the surface of many inorganic substances, such as glass, metal oxides, etc., through chemical bonds, just like tenon and mortise. In this way, an organic modified layer is built on the surface of the inorganic substance, thereby improving its surface properties.
Under normal conditions, N-octadecyl trimethoxysilane is relatively stable and is not prone to spontaneous chemical reactions. However, when exposed to water, the trimethoxy group is easy to hydrolyze. The hydrolysis process is like a trickle, gradually unfolding to form methanol and silanol. This hydrolysis reaction, although not rapid and intense, quietly changes the chemical form of the substance.
Silica alcohols can further condense to form silicone bonds, which is like building a stable bridge to build a more complex network structure. The long-chain octadecyl group endows the substance with excellent hydrophobicity. Just like the microstructure of the surface of the lotus leaf, with the unique arrangement of octadecyl groups, it is difficult for water to adhere to its surface and spread out, but form water droplets to roll off.
When storing and using this substance, care should be taken to avoid contact with excess moisture to prevent premature hydrolysis and loss of its original efficacy. Just as the proper preservation of precious utensils, it is necessary to pay attention to the taboos of its environment. Overall, under suitable conditions, N-octadecyl trimethoxysilane can maintain its relatively stable chemical properties, providing a reliable and effective application basis for many fields, such as material surface modification, waterproof treatment, etc.
N-Octadecyltrimethoxysilane need to pay attention to when storing
When storing N-octadecyl trimethoxysilane, many matters must be paid attention to. This material is active and easily hydrolyzed in contact with water, so the first thing is to prevent moisture. It must be stored in a dry place and sealed tightly to prevent moisture from entering.
Furthermore, temperature is also the key. It should be stored in a cool place to avoid high temperature hot topics. If the temperature is too high, it will not promote its chemical reaction, causing its properties to change and reducing its effectiveness. Generally speaking, the temperature should be between 5 and 30 degrees Celsius.
Because of its volatility, the storage place must be well ventilated. This can avoid gas accumulation and reduce the risk of safety. And well ventilated, also helps to maintain its stability.
In addition, when storing, it should be kept away from fire sources, heat sources and strong oxidants. This is because the substance may be flammable, in case of open flames and hot topics, it is easy to cause fires. And strong oxidants come into contact with it, or react violently, endangering safety.
It should also not be mixed with acids, alkalis and other substances. Due to its chemical properties, it encounters with acids and alkalis, or causes hydrolysis and deterioration, which damages its quality. It must be stored in categories according to regulations to ensure its pure and stable quality and use it correctly.
What are N-Octadecyltrimethoxysilane synthesis methods?
The synthesis method of N-octadecyl trimethoxysilane has been known for a long time. One method is to use octadecyl chloride and trimethoxysilane as raw materials, and the two interact under specific reaction conditions in a suitable reaction vessel. First, the temperature of the reaction system is adjusted to a certain range so that the two can fully contact and initiate the reaction. This reaction needs to be carried out under the protection of inert gas to prevent the raw materials and products from being affected by impurities in the air. During the reaction process, pay close attention to parameters such as temperature and reaction time, and stir in a timely manner to promote the uniform progress of the reaction. After the reaction is completed, through the separation and purification steps, pure N-octadecyl trimethoxysilane can be obtained.
Another method, using octadecanol and trimethoxysilane as the starting material, with the help of the catalyst, the chemical reaction between the two occurs. It is crucial to select a suitable catalyst, which can significantly speed up the reaction rate and has an important impact on the selectivity of the product. In the reaction device, add a quantitative amount of octadecanol and trimethoxysilane, and then add an appropriate amount of catalyst. Set the reaction temperature and time to maintain the stability of the reaction system. After the reaction, use filtration, distillation and other means to remove impurities, refine the product, and finally obtain the target N-octadecyl trimethoxysilane.
All synthesis methods have their own advantages and disadvantages, and they need to be carefully selected according to specific needs and conditions before N-octadecyl trimethoxysilane can be synthesized efficiently and with high quality.