How to judge the quality of silicone defoamer agent?-Iota

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Service > How to judge the quality of silicone defoamer agent?

How to judge the quality of silicone defoamer agent?

Defoaming including "foam" and "breaking the two aspects of global". Defoaming agent has the twofunctions, it can reduce the surface tension of water, the solution, suspension, prevent the formation of bubbles, or the original bubble reduced, usually has a selective effect. The general physical bubble elimination method to instant defoaming, and chemical interface defoaming, fast,convenient, efficient defoaming, in short, defoaming agent is a chemical and chemical reagent ofglobal consumer interface. Defoamers defoaming, breaking the specific process is: when the bubbledefoaming agent is added to the system, covering the liquid surface molecules out of order, inhibit the formation of elastic membrane, the termination of bubble. If in a large number of bubbles in the system, the amount of defoaming agent, the molecules will soon spread on the foam surface, rapid deployment, full spread, forming a double film is very thin, and then step by step diffusion, osmosis,layered intrusion, to replace the original thin bubble film. Because of its low surface tension, high surface tension will flow to produce foam liquid, so the low surface tension of defoaming agent in thegas-liquid interface between molecular diffusion and permeability, the membrane wall becomes very thin, but also by the film bubble surface around Zhang Lida's strong traction, this kind of foam,resulting in stress around the imbalance thus, in the "bubble breaking". Insoluble system of defoaming agent molecules, surface, re entering another bubble film repeat, all bubbles, all.

Defoaming agent is a kind of modified silicone, and then after a latex emulsion. Because silicone defoamer is an emulsion, so his consistency and content is it doesn't matter. Some products may be very rare, but the content is very high, some products may be very thick, but content is very low, we can not say that thick, must be good. Dilute, it must be bad, in fact, some of the dilute defoamer forbetter defoaming, because better dispersion. Defoaming is better than thick. A good defoaming agent should also have fast defoaming and antifoaming lasting function. Some defoaming agent,defoaming may soon, but not what defoaming effect, so it is necessary to add a lot of, don't stop, so itwill be very costly. While some defoamer, perhaps his defoaming speed is not fast, but thedefoaming effect is very good. As long as the treatment inhibited the generation of foam, add some weight to long so, it's quite a bargain. Different industries, the silicone defoamer requirements are different. So the organosilicon defoamer changed a lot, there are high temperature, is resistant to acid, alkali resistant, fast defoaming, has good defoaming performance.

Because silicone defoamer has several decades of development, a modification of great content, is not the only judge on the basis of some content of foaming agent, consumption is very high, but the effect is not good. Some anti foaming agent content is not high, but the effect is very good. Somecustomers because of habits, like water dilute silicone defoaming agent before use, in fact, this habitis not very good, because it will destroy the emulsion, let consumer agent's performance is greatly reduced. If you must adhere to such use, it is necessary to use it in a short time. For this, we must add some thickening agent, to improve its stability, in order to maintain the performance oforganosilicon defoaming agent.