Outstanding product performance of silicone defoamer
With the continuous advancement of modern science and technology, defoamers, which were originally not very effective in industrial production, are now playing an increasingly important role, and different types of defoamer products are gradually being developed and produced. The most common ones are water-based defoamers and silicone defoamers, etc., and different defoamer products often have different effects. The following is an example of silicone defoamer products, and the industry experts will give you a detailed introduction to the performance of the products.
According to industry experts from professional defoamer manufacturers, silicone, as one of the most widely used pharmaceutical products in modern industrial production, can play such an important role in modern industrial production. The most fundamental reason is mainly the following points:
1. Good thermal stability:
Take the commonly used dimethyl silicone oil as an example. It can withstand 150 degrees Celsius for a long time and 300 degrees Celsius for a short time, and its Si-O bond does not decompose. This ensures that silicone defoamers can be used in a wide temperature range.
2. Physiological inertness:
Silicone oil has been proven to be non-toxic to humans and animals, and its median lethal dose is greater than 34 grams/kilogram. Therefore, silicone defoamers (with appropriate emulsifiers) can be safely used in food, medical, pharmaceutical and cosmetic industries.
3. Low surface tension:
The surface capacity of silicone oil with a certain 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 is another reason why silicone defoamers are widely used.
4. Good chemical stability:
Since the Si-O bond is relatively stable, the chemical stability of silicone oil is very high and it is difficult to react chemically with other substances. Therefore, as long as the formulation is reasonable, silicone defoamers are allowed to be used in systems containing acids, alkalis and salts.
5. Wide application:
Due to the special chemical structure of silicone oil, it is neither soluble in water or substances containing polar groups, nor in hydrocarbons or organic substances containing hydrocarbon groups. Therefore, silicone defoamers are evenly soluble in water, animal and vegetable oils and high-boiling point mineral oils. Due to the insolubility of silicone oil in various substances, it has a wide range of applications. It can be used in both water system defoaming and oil system.
6. Strong defoaming power:
Organic silicon defoamers can not only effectively break the foam that has been generated, but also significantly inhibit foam and prevent the generation of foam. Its usage is very small. As long as one millionth (1ppm) of the weight of the foam is added, it can produce a defoaming effect. Its common range is 1 to 100ppm. In this way, it is not only low-cost, but also does not pollute the defoamed substance.
Due to the above advantages of organic silicon defoamers, they are increasingly used to replace other types of defoamers in applications, especially in the pharmaceutical, medical and food fermentation industries, which are unmatched by other types of defoamers. In addition, there is also a polyether defoamer that plays an increasingly prominent role in the current economic and social development.
