Defoamer technology Ask for advice, how to use defoamer will be better

Generally speaking, it is infrared, nuclear magnetic resonance (NMR) to test important ingredients, LC-MS, GC-MS to test trace elements. If you want to be detailed, you can recruit that friend upstairs.

If you are not satisfied, you should go to the testing facility. You say you're going to do a defoamer analysis, and then ask them to explain how to do it.

At present, the domestic authority in the composition analysis industry should be microspectral testing, you can call ** to ask.

Defoamers, also known as defoamers, are food additives that reduce surface tension during food processing, inhibit foam production or eliminate foam that has already been produced. There are 7 kinds of defoamers licensed for use in China, such as emulsified silicone oil, high-carbon alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether and polyoxypropylene polyoxyethylene glycerol ether, polydimethylsiloxane, etc.

The local surface tension of the foam decreases, resulting in the bursting of the foam.

The origin of this mechanism is the sprinkling of higher alcohols or vegetable oils on the foam, which, when dissolved into the foam, significantly reduces the surface tension there. Because these substances are generally less soluble to water, the reduction in surface tension is limited to the part of the foam, while the surface tension around the foam barely changes. The part where the surface tension is reduced is strongly pulled and extended in all directions, and finally ruptures.

2 Defoamers can destroy the elasticity of the membrane and cause the bubbles to burst.

When the defoamer is added to the foam system, it will diffuse to the gas-liquid interface, making it difficult for the surfactant with foam stabilization to restore the elasticity of the film.

3 Defoamers can promote the drainage of liquid films, which can lead to the bursting of bubbles.

The rate of foam discharge can reflect the stability of the foam, and the addition of a substance that accelerates foam discharge can also play a defoaming role.

4 The addition of hydrophobic solid particles can cause bubbles to burst.

The hydrophobic solid particles on the surface of the bubble attract the hydrophobic end of the surfactant, causing the hydrophobic particles to become hydrophilic and enter the aqueous phase, thus playing a defoaming role.

5. Solubilizing foaming surfactants can cause bubbles to burst.

Some low-molecular-weight substances that can be well mixed with the solution can solubilize the bubble surfactant and reduce its effective concentration. Low molecular substances such as octanol, ethanol, propanol and other alcohols with this effect can not only reduce the surfactant concentration of the surface layer, but also dissolve into the surfactant adsorption layer, reduce the tightness between surfactant molecules, thereby weakening the stability of the foam.

6 The electrolyte disintegrates the electric double layer of the surfactant, causing the bubble to burst.

For foaming liquids in which the electric double layer of the surfactant interacts with each other to produce a stable foaming solution, the electric double layer of the surfactant can be disintegrated by adding an ordinary electrolyte to defoam.

The correct use of the defoamer can make the defoamer more effective. So how do you use defoamers correctly?

1. First small test, then medium test.

Determine the best product to use and the best dosage;

2. Stir well.

Before using the defoamer, the emulsion should be reasonably diluted, and then stirred thoroughly until it is homogeneous;

3. Run out in a short period of time.

In order to ensure the concentration and defoaming effect of the defoamer, the defoamer needs to be used up in a short time;

4. Protect against frost and high temperatures.

Defoamers can affect their performance under frost and high temperatures;

5 Prohibitions**.

Strong ** will destroy the stability of the defoamer;

6. The viscosity is suitable.

Maintaining the right viscosity is the key to getting the most out of the defoamer.

There is no fixed way to use this, such as adding before the foam is generated to reduce the foam in the foam production process, which mainly has the effect of foam suppression. In the foam generation link, the addition can achieve the effect of direct defoaming, depending on the specific process flow, the production of foam and its own requirements to add.

Summary. Kiss! Hello, happy to answer your <>

The formula of the pro-defoamer is as follows: methylsiloxane oil 10g, sodium tripolyphosphate 10g, salt 70g, mannitol 5g, silicon dioxide 2g. Defoamers should have the following properties:

Strong defoaming power and low dosage; The addition to the foaming system does not affect the basic properties of the system, that is, it does not react with the defoaming system; Low surface tension; Good balance with the surface; Good heat resistance; Good diffusion and permeability, high spreading coefficient; Chemically stable, strong oxidation resistance; Good gas solubility and permeability; Low solubility in foaming solution; It has no physiological activity and high safety. Hope mine can help you <>

Do you have any other questions?

Find the defoamer formulation.

Kiss! Hello, happy to answer your <>

The formula of the pro-defoamer is as follows: methylsiloxane oil 10g, sodium tripolyphosphate 10g, salt 70g, mannitol 5g, silicon dioxide 2g. Defoamers should have the following properties:

Strong defoaming power and low dosage; The addition to the foaming system does not affect the basic and virtual properties of the system, that is, it does not react with the defoaming system. Low surface tension; Good balance with the surface; Good heat resistance; Good diffusion and permeability, high spreading coefficient; Chemically stable, strong oxidation resistance; Good gas solubility and permeability; Low solubility in foaming solution; It has no physiological activity and high safety. I hope mine can help you <>

Do you have any other questions?

It is a high-temperature lubricating oil defoamer, which is used as lubricating oil, and the temperature is about 200 degrees.

Yes, dear.

How to use:

China's "Hygienic Standards for the Use of Food Additives" stipulates that the maximum amount used for brewing process is 1g kg, the soy product process is 3g kg for sugar making process and fermentation process, and the amount of addition for general industrial use is about 1g.

This product is specially designed for defoaming in the food processing industry, also known as DSA-5 defoamer, which is a key defoamer promoted by China's food industry, especially in the context of strict control of silicon residues and prohibition of polyether defoamers in many countries, it has more application value; The product has the unique advantages of not affecting the taste of the product, rapid defoaming, long-lasting foam inhibition, and defoaming efficiency up to 96-98%, and is widely used in soybean products, dairy industry, pharmaceutical, dairy products, beverages, sugar industry, soybean protein extraction, sauce and vinegar brewing, cigarette mouth adhesive and other food industries; Due to the superior performance of the product, it is also used in a variety of industries such as synthetic latex, metal cleaning, etc.

How to use:

1. According to different foaming systems, adjust the dosage, and the recommended range of use is in.

2. When using, dilute with water or working solution, stir well, or add directly.

Precautions for use:

1. It can be used in aqueous systems below 100.

2. Stir evenly when using.

Features: Non-silicone defoamer is a non-silicone defoamer for hydrophilic media system, because it does not contain silicone components at all, so it will not cause silica spots to remain on the tank wall, and it is easy to clean the equipment. It is important to add water-based glue (such as white latex, acrylic resin glue, acetate resin glue, epoxy resin glue, etc.), waterproof coatings, water-based inks, water-based inks, water-based varnishes not only defoaming, but also will not cause product shrinkage and corns. Especially for the PCB (circuit board) industry, water-based paint sewage, mesh film sewage treatment industry is of great help.

Uses: Mainly suitable for PCB circuit boards (development, ink removal, sewage links); chemical industry (all chemical production and use links); electroplating (potion production, electroplating bath); Dyeing; Papermaking (pulping, papermaking, sewage links); Medicine; waterproof coatings; water-based inks; water-based inks; water-based varnish; water-based glue; ceramic slitting and polishing process; cleaning of steel plates; processing of aluminium; Defoaming and foaming inhibition of various sewage treatment and various industrial water systems. Defoaming of water treatment systems such as cooling circulating hydropower plants. It can quickly eliminate the foam produced by slime, water treatment agents, fungicides, etc., and will not block the net for the treatment of the omentum circulating water.

From an application point of view, we certainly want the defoamer to be as easy to operate as possible, and it is best to add the defoamer to the foaming solution at one time to eliminate foam throughout the process and effectively control foam. But the fact is that there are industries where such applications do not work well. Because the defoamer must be discharged at the interface between liquid and air to play a defoaming role.

In this process, there are many factors that can remove the defoamer from the surface, in other words, over time, the defoamer will slowly dissolve or emulsify into the liquid, losing the ability to defoam, generally speaking, the speed of the dissolved emulsification of the defoamer is related to the following factors: shear force, type and concentration of surfactant, temperature, pH value, solvent type and content, and some special substances that may be present.

Therefore, based on the above analysis, it is generally recommended that the safest and most effective method is to add a low concentration of defoamer in a continuous or semi-continuous manner during the production process. In this way, both foaming and oil contamination of the silicones are prevented, and excessive amounts must be avoided if sufficient silicone defoamers must be added at the beginning of the operation.

The defoamer is added directly to the foaming system to ensure that it is evenly dispersed. If diluted, do not store the dilution for more than 8 hours. For the system with a high foaming temperature (>60), it is recommended to add it to the system before 60 and disperse evenly to exert its maximum effectiveness.

According to the viscosity, temperature and stirring of different foaming systems, the more economical dosage is selected in units of 10ppm, and generally speaking, the dosage of 30-200ppm can ensure the ideal defoaming effect.

This depends on the individual process, the concentration requirements of Yuheng Chemical's defoamer: the dosage of defoamer depends on different applications, but it is recommended that the content of the active substance is not less than 10ppm.

Add of defoamer: Before adding the foaming solution, it should be gently shaken to ensure that the emulsion is uniform. It can also be added directly, or it can be pre-diluted with thickened water and then added to the foaming solution. However, the diluted defoamer must be used up in the same month.

Substances that reduce the surface tension of water, solutions, suspensions, etc., prevent the formation of foam, or reduce or eliminate the original foam.

Under the condition of gravity and pressure difference, the liquid film of the foam will flow unevenly and discharge, and the gas in the bubble will continue to diffuse and penetrate due to the different pressure differences on both sides of the bubble film, so the instability of the foam itself is mainly reflected from the kinetic aspect.

The attenuation mechanism mainly includes the diffusion of gas through the liquid film and the discharge of the liquid film, which are the inherent properties of the foam itself and have nothing to do with the presence or absence of surfactants.

However, these two attenuation mechanisms only play an obvious role in the initial stage of the formation of the foam system, and with the attenuation of the foam system, these two effects gradually weaken, making the rate of foam attenuation gradually slow down.

Defoamers are used because in some processes, there are too many bubbles or foams in the liquid that can affect the quality, production efficiency, and production cost of the product. Defoamers can eliminate these bubbles or foams, thereby improving the production process, increasing product quality and production efficiency.

Here are some reasons to use defoamers:

Increased production efficiency: The use of defoamers can reduce the generation of bubbles or foam, thereby speeding up the production process and increasing production efficiency.

Improve product quality: Bubbles or foams can reduce the quality and performance of the product, and the use of defoamers can eliminate these bubbles or foams, thereby improving the quality and performance of the product.

Reduced production costs: The use of defoamers can reduce the generation of bubbles or foam, thereby reducing production costs.

Improves chemical reactions: In some chemical reactions, bubbles or foams are produced that can affect the rate and stability of chemical reactions. These bubbles or foam can be eliminated by using a defoamer, which can improve the chemical reaction.

Overall, the use of defoamers can improve production efficiency, improve product quality and reduce production costs, improve the production process, and thus promote the development of the industry.

Defoamers are substances that reduce the surface tension of water, solutions, suspensions, etc., prevent foam formation, or reduce or eliminate the original foam.

1. Foam local surface tension reduction: similar to sprinkling high-grade alcohol or vegetable oil on the foam, when it enters the foam liquid, the surface tension is reduced, coupled with the vibration under the action of the machine or artificial, the foam will naturally burst and eliminate;

2. Destroy the elasticity of the foam film: because the surfactant is added in the production process of the defoamer, when it is added to the foam, because the surfactant will be dispersed like a liquid, it is difficult for the foam film to recover to elasticity;

3. Liquid film drainage speed is accelerated: this method can test the stability of foam, and a substance can be added to the defoamer to increase the drainage speed, so that defoaming treatment can also be carried out;

4. Increase surfactant: In some low-molecular-weight mixtures, increasing surfactant can reduce its concentration and weaken the stability of the foam.