Advantages of silicone defoamer
1.Wide range of applications:
Due to the special chemical structure of silicone oil, it is neither compatible with water or substances containing polar groups, nor with hydrocarbons or organic substances containing hydrocarbon groups. Therefore, silicone defoaming agents are uniformly dissolved in water, animal and vegetable oils and high-boiling point mineral oils. Due to the insolubility of silicone oil to various substances, it has a wide range of applications. It can be used for defoaming in water systems and in oil systems.
2. Low appearance tension:
The surface strength of silicone oil of various viscosity is generally 20-21 dynes/cm, which is much smaller than the surface tension of water (72 dynes/cm) and general foaming liquids. This also means that silicone defoaming agents are widely used. Another reason.
3. Good thermal stability:
Take the commonly used dimethyl silicone oil as an example. It can withstand 150 degrees Celsius for a long time and more than 300 degrees Celsius for a short time. Its Si-O bond does not decompose. This ensures that the silicone defoamer can be used within a wide temperature range.
4. Good chemical stability:
Because the Si-0 bond is relatively stable, silicone oil has high chemical stability and is difficult to react chemically with other substances.Therefore, as long as the preparation is reasonable, silicone defoaming agents are allowed to be used in systems containing acids, alkalis, and salts.
5. Physiological inertia;
Silicone oil has been proven to be non-toxic to humans and animals, and its half-lethal dose is greater than 34 g/kg. Therefore, silicone defoaming agents (with appropriate emulsifiers) can be safely used in industries such as food, medical, pharmaceutical and cosmetics.
6. Strong defoaming power:
Silicone defoamer can not only effectively break the foam that has been generated, but also significantly inhibit foam and prevent the formation of foam. Its usage is very small, as long as it participates in one millionth (1ppm) of the foaming weight, it can produce defoaming effect. Its common range is 1 to 100ppm. When used in this way, it is not only low cost, but also does not pollute the defoamed material.Since silicone defoamer has the above advantages, it is increasingly used to replace other types of defoamer in applications, especially in the pharmaceutical, medical and food fermentation industries. It is unmatched by other types of defoamer. .
