Category: Chemicals&Materials

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Betaine surfactants Sodium Salt of Polynaphthalene Sulphonic Acid CAS 36290-04-7

Betaine surfactants

It is generated by the reaction of fatty tertiary amines and salt chloroacetate, including cocoylpropyl betaine, dodecyl betaine, cetyl betaine, and lauroyl propyl betaine. It is milder than the first 3 and is currently the major surfactant in baby hair shampoo.

In 1940, the American DuPont Company designed and applied this sort of compound. Like amino acid surfactants, this sort of surfactant has solid detergency and low irritation, and the solution is weakly acidic. Animal experiments have proven that this kind of compound is much less harmful. It is an ideal surfactant.

( surfactants in shampoos)

Amino acid surfactants

Made from a mix of coconut oil and amino acids, it is secure, mild, and non-irritating. The most important point is that it is normally weakly acidic and meets the pH needs of healthy skin and hair. It is the optimal surfactant in infant shampoo. They are "cocoyl glycine," "cocoyl glutamate disodium," and so on

From the point of view of chemical properties, its pH value is in between 5.5 and 6.5, which is weakly acidic and near the pH worth of human skin. Therefore, it is gentle and skin-friendly and appropriate for all hair kinds; amino acid surfactants are zwitterionic and easily soluble in water. It is very easy to rinse clean.

However it additionally has restrictions. Amino acid surfactants are several to dozens of times extra expensive than regular surfactants, and many are hair shampoos particularly created babies and children. The negative aspects of amino acid surfactants are that they are not abundant in foam and have weak decontamination ability.

The sensation of solidification and turbidity of surfactants in winter season is mostly because of the low temperature triggering some of its elements to take shape or precipitate.

(surfactants in shampoos)

What if surfactant solidifies and comes to be turbid in winter season?

This is a physical sensation and does not have a substantial impact on the efficiency of surfactants. In order to resolve this problem, the adhering to techniques can be taken:

1. Enhance the temperature level: Position the surfactant in a cozy setting or raise its temperature level by home heating so that the taken shape or precipitated parts will slowly dissolve and the surfactant will certainly go back to a clear state. Nevertheless, it ought to be kept in mind that the temperature level must be prevented when heating up to avoid affecting the surfactant's efficiency.

2. Mixing: For surfactants that have actually strengthened or come to be turbid, they can be recovered to a consistent state by mixing. Stirring can aid taken shape or precipitated ingredients redisperse into the liquid and enhance surfactant clearness.

3. Include solvent: In many cases, a proper amount of solvent can be added to water down the surfactant, therefore improving its coagulation and turbidity. However, the included solvent must work with the surfactant and must not affect its use impact.

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Surfactant-enhanced ultrasonic extraction of polymer substances from remaining sludge cationic surfactant

Wastewater source application is the future growth direction of sewage treatment and is additionally an unpreventable necessity for sustainable human advancement. Organic matter drawn out from sewage or sludge, such as minerals and phospholipids, can be made use of as printing and coloring basic materials, main adsorbents, and biological flocculants. It is made use of in water treatment, farming, horticulture, the paper sector, medical care, the building market, and other fields and has excellent importance. Recycling value.


There are lots of kinds of microorganisms in the staying sludge. As a result, the substances drawn out from it has to be a mix of numerous polymer compounds. Whether they are intracellular or extracellular polymer substances, they all have regular active groups, such as carboxyl, hydroxyl, and phosphate. Teams and other functional teams. The presence of these groups permits the extracted polymer materials to be made use of as hefty steel ion adsorbents.

As a tidy treatment innovation, ultrasonic waves do not call for the addition of chemicals throughout the action and will certainly not cause secondary air pollution. Ultrasonic waves can spread flocs in the water stage, and the cavitation result can break large bits into tiny bits. Ultrasound is an energy-intensive therapy technique, and its most significant drawback is its high power intake, which restricts the possibility of useful applications. Surfactant has a solubilizing impact, which can wash off healthy proteins on the cell membrane layer, enhance the leaks in the structure of the cell membrane layer by influencing the osmotic pressure, and increase the damage to the sludge floc. On top of that, surfactant activity can advertise the extraction of EPS from continuing to be sludge, alter the cell structure, and affect sludge residential properties.

Surfactant-enhanced ultrasonic techniques can be utilized to remove natural polymer materials and as a pretreatment technique to decrease energy intake. The increase in the removal amount of PSs from the staying sludge under the action of surfactant-enhanced ultrasound is because of the release of organic matter because of floc disintegration and cell dissolution.


First, surfactants, such as anionic (such as sodium dodecyl sulfate, SDS) and cationic (such as cetyltrimethylammonium bromide, CTAB), are used to boost the connection in between sludge and polymer materials. Interactions in between. They can reduce the surface tension of sludge, making it much easier for polymer substances to separate from sludge.

Subsequently, ultrasound is presented to improve the extraction effect better. The strong resonance and shock waves created by ultrasonic waves can ruin the framework of sludge and rupture cell wall surfaces, therefore releasing even more polymer substances. Additionally, ultrasound can likewise promote the interaction between surfactants and polymer compounds, making the extraction process a lot more reliable.

During the removal process, it is also necessary to optimize the speculative parameters, such as the regularity, power, and activity time of ultrasonic waves, to accomplish the very best extraction effect.


Generally, surfactant-enhanced ultrasonic removal of polymer compounds in residual sludge is an efficient and innovative approach. It not only enhances removal efficiency however likewise assists broaden the scope of source use of continuing to be sludge, providing new opportunities for the advancement of sewer therapy and source healing fields. Nevertheless, the practical application of this approach needs additional research and optimization to solve feasible technological problems and financial concerns.


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