The main factors affecting the effect of defoamer
Defoamer is also called antifoam and defoaming agent. Defoamer actually means to eliminate foam, which is a kind of Low surface tension and high surface activity can inhibit or eliminate foam in the material system The production process will produce a lot of harmful foam, which will seriously affect the production progress. Then you need to add Defoamer to eliminate these harmful foam.
The defoaming effect of anti-foam agent is influenced by various factors, mainly including the following points
1. Surface tension
Surface tension is an important factor affecting the effectiveness of antifoam. The role of defoamer is to destroy the stability of foam by reducing the surface tension of liquid, so as to achieve defoaming.
2. Mixing time
The adequacy of stirring time can affect the distribution and effectiveness of defoaming agent. Insufficient stirring may lead to the aggregation of defoamers, thereby reducing their defoaming ability.
3. Liquid temperature
The temperature of the foaming liquid can also affect the performance of defoamers. At high temperatures, it may be necessary to use special high-temperature resistant defoamers, otherwise the effectiveness of ordinary defoamers will be greatly reduced.
4. Properties of defoamer
An effective defoamer should have the following properties: strong defoaming power, low dosage, no impact on the basic properties of the system, low surface tension, good heat resistance and chemical stability, high diffusion and permeability, low solubility, and high safety.
5. Foam decay mechanism
The decay of foam usually involves the loss of liquid and the diffusion of gas through the liquid film. These processes determine the stability of foam and the effect of defoamer.
6. Marangoni effect
Due to the uneven distribution of surfactant molecules in the liquid film, resulting in the difference of surface tension, this effect will affect the stability of foam and the effect of foam control agent.
Understanding these factors is crucial for selecting appropriate defoamer and optimizing their usage conditions. In practical applications, it is usually necessary to determine the optimal type and usage conditions of defoamer through experiments in order to achieve the best defoaming effect.
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