Rising Posture - Silicone Defoamer


Silicone defoamer has the characteristics of good compatibility, strong dispersion, stable mixing, fast defoaming speed, durable foam suppression and wide application. Let's have a detailed understanding of its characteristics.


1. Wide application: Because of the special chemical structure of silicone oil, it is neither soluble with water or substances containing polar groups, nor with hydrocarbons or organic compounds containing hydrocarbons. Because of the insolubility of silicone oil to various substances, it has been widely used in both water and oil systems for defoaming.


2. Low surface tension: the surface capacity of silicone oil is generally 20-21 dyne/cm, which is smaller than that of water (72 dyne/cm) and general foaming fluid, and the defoaming efficiency is better.


3. Good thermal stability: Take dimethylsilicone oil as an example, it can withstand 150 C for a long time and over 300 C for a short time, and its Si-O bond does not decompose. It ensures that organosilicon defoamer can be used in a wide temperature range.


4. Good chemical stability: Because the Si-O bond is relatively stable, the chemical stability of silicone oil is very high, and it is difficult to react with other substances. Therefore, as long as the preparation is reasonable, organosilicon defoamer is allowed to be used in the system containing acid, alkali and salt.


5. Physiological inertia: Silicone oil has been proved to be non-toxic to humans and animals, and its semi-lethal dose is more than 34 g/kg. Therefore, organosilicon defoamers (in combination with non-toxic emulsifiers, etc.) can be safely used in food, medical, pharmaceutical and cosmetic industries.


6. strong defoaming power: silicone defoamer not only can effectively break the foam that has been generated, but also can significantly inhibit foam and prevent foam formation. Its usage is very small, as long as one millionth of the weight of foaming medium is added, it can produce defoaming effect. Not only the cost is low, but also the defoamed substance is not polluted.