Bubbles play an important role in industrial production. In the production of foam due to various reasons, use a defoamer to defoam. The use of defoamers has certain safety hazards. The following will analyze the use of defoamers one by one to find out the correct method of use.

The first is the turbidity of the defoamer.

The main components of defoaming are generally hydrophobic particles, silicone oil and emulsifiers. The hydrophobic particles absorb silicone oil, so that the silicone oil achieves the best effect under the least possible conditions. As the main defoaming medium, silica gel has low surface tension, is not lipophilic or hydrophilic, and is suspended in the system. When there is a defoamer in the middle of the foam, the discharged oil and water have a defoaming effect on the foam. Silicone also has a small amount of defoaming effect. After the silicone resin is completely defoamed outside the hydrophobic particles, the foam system will become turbid. The results show that the hydrophobic particles, silicone oil and emulsifier used in the defoaming agent are different in the amount and color, and their performances are quite different. The defoaming effect is good, the defoaming time is long, the defoaming effect is good, and turbidity generally does not occur.

Second, the problem of bubble suppression time.

The nature of silicone oil in the defoaming agent determines the defoaming time of the defoaming agent, and the content of silicone oil determines the defoaming cycle of the defoaming agent. Too little silicone oil content will make the defoaming performance of the defoaming agent unable to meet the requirements. It will mostly affect the performance of the defoamer, and also reduce the defoaming performance of the defoamer; too much particle size of the defoamer will affect the filter resistance of the defoamer, and too much particle size will cause the defoamer to produce bleaching oil, thereby affecting The defoaming effect of the defoamer; the defoaming time is also an important indicator to measure the defoaming performance of the defoamer. Insufficient mixing will cause turbidity, shorten the defoaming time, and reduce the defoaming effect.

Third, the issue of failure.

Stable acid and alkali; Silicone oil can destroy the surface tension of the liquid and play a role in eliminating foam. If the defoamer is poor in acid and alkali resistance, it will cause the decomposition of silicone oil, thereby reducing the defoaming ability or even failure. The addition of silicate system can generally suppress Its decomposition. Defoaming and dissolving; certain chemical components dissolve silicone oil in the system, so the defoaming agent no longer produces defoaming effect, but exists in the system as a surfactant, and its foaming effect is better than when no defoaming agent is used To be big.

Fourth, the classification of defoaming.

With the increase in the types and application fields of defoamers, the performance of its defoamers has also been continuously improved, from the first generation of mineral oil defoamers to the second generation of polyether defoamers, the third generation of silicone defoamers and Polyether modified silane defoamer.

Fifth, how to use defoamer.

When purchasing a defoamer, try to choose a branded manufacturer, so that there will be few problems when using the defoamer. According to the instructions provided by the manufacturer, add the defoamer in a standard proportion to achieve the best defoaming. Bubble effect.