1. What is a defoaming agent
Anti-foaming agent is also called an anti-foaming agent. An industrial additive to eliminate foam, it can reduce and prevent the occurrence of foam in industrial production liquids.
In industrial production, we often encounter the emergence of foam, which affects various performance parameters of product performance. Therefore, we need the help of defoaming agents, which have a high affinity with the air-liquid surface. , will make the foam unstable, thus causing the bubbles to burst.
There are many types of defoaming agents. According to different ingredients, there are polyethers, mineral oils, alcohols, silicones, etc. They are suitable for many different fields and can be selected according to needs.
2. Components of defoaming agents
There are many types of defoaming agents, and different defoaming agent compositions The ingredients are different, but they are generally composed of active ingredients, emulsifiers, carriers and emulsifying aids:
1. Active ingredients are the main core part , which plays the role of breaking bubbles and reducing surface tension.
2. Emulsifiers disperse active ingredients into small particles so that they can be better dispersed into oil or water and achieve better defoaming effects.
3. The carrier accounts for a large proportion of the defoaming agent, and its surface tension is not high. It mainly plays the role of supporting the medium, which is beneficial to the foam suppression and defoaming effects. , can reduce costs.
4. The function of emulsifying additives is to make the emulsification effect better.
3. Characteristics of defoaming agents
Defoaming agents should have the following properties:
1. Strong defoaming power and low dosage.
2. Adding it to the foaming system does not affect the basic properties of the system, that is, it does not react with the system being defoamed.
3. Small surface tension.
4. Good balance with the surface.
5. Good heat resistance.
6. Good diffusivity and permeability, and high positive spreading coefficient.
7. Chemically stable and highly resistant to oxidation.
8. Good gas solubility and permeability.
9. Low solubility in foaming solutions.
10. NonePhysiologically active and highly safe.
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