Polyether defoamer foam will bring inconvenience to the production and processing process, seriously affect the normal operation of process operation and equipment, and even affect product quality, so a variety of defoamers came into being. Polyether modified silicone oil is prepared to become a defoamer, which has a particularly good effect in the process of fermentation, sugar making, concentration, distillation and other processes in food productionLet's find out with Defeng!
The application of defoamers is incompatible with improving foam stability. Some defoamers eliminate foam through chemical reactions, such as acid or calcium salts can destroy the soap film, while most defoamers achieve the purpose of defoaming by reducing the surface tension of the system, making the liquid easy to spread and adsorb on the surface, thereby reducing the surface strength of the liquid.
There are many types of defoamers, in addition to alcohols, fatty acids, phosphates, amides, etc., silicone oil is also a commonly used excellent defoamer. It can be used in both aqueous and non-aqueous systems. The surface tension of silicone oil is very low, and when added to the aqueous system, it will be preferentially adsorbed on the liquid film, so that the formed film has a lower surface tension than the surface of the original bubble film. It stands to reason that this is more likely to produce bubbles, but silicone oil defoamers are short-chain substances, although they have lower surface tension, but the strength of the surface ** formed is very low, so they can promote the bursting of bubbles, thereby effectively eliminating bubbles.
Defoamer manufacturers use polyether modified silicone oil as the active ingredient of the defoamer, and at the same time, according to the rule that the more similar the structure, the better the emulsification effect, the polyether modified silicone oil is used as the active ingredient. In addition, after compounding with methyl silicone oil, there is some strong effect between the compound components, which significantly reduces the surface tension, which can make the silicone emulsion spread faster, improve the defoaming speed, and not easy to break the emulsion, and jointly play a defoaming role.
A certain amount of polyether itself is a good defoamer. Experiments show that with the increase of polyether content, the defoaming ability gradually increases, but the foam inhibition ability decreases correspondingly. Considering that the defoamer needs to have good defoaming ability and foam inhibition ability, the recommended dosage is 01%~0.7%。Please determine the exact dosage through experiments.
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