The principle and use method of CMC in the field of detergents

As a derivative of cellulose, sodium carboxymethyl cellulose has its applications in all walks of life. Today we will introduce its application in the field of detergents. What are its principles and methods of use? Let us get to know it.

The role of CMC-Na in detergents are mainly its emulsification and protective colloid properties. The anions generated during the washing process can simultaneously make the surface of the washed object and the dirt particles negatively charged, so that the dirt particles have phase separation in the water phase. It is repulsive to the solid phase of the surface of the washed items. Therefore, it can prevent dirt from being deposited on the washed items again. It can maintain white fabrics whiteness and make colored fabrics colorful. The general proportion of sodium carboxymethyl cellulose in detergent aqueous solution is 2%. There is still a misunderstanding here. Even many insiders feel that CMC-Na itself has a cleaning effect and can wash away dirt. This is wrong concept.


So what exactly is it? Let me explain in detail. CMC-Na has a good washing aid effect, especially when washing cotton fabrics in hard water. It stabilizes foam, saving washing time and meanwhile enabling repeated use of washing liquid. CMC-Na is used in slurry detergents and has a stabilizing effect to prevent the detergent precipitation. The amount of CMC-Na used in detergents is determined by the formula and quality requirements of the detergent, generally in the range of 1-4%. The method of use is to add the monomer slurry of the synthetic detergent into the tank of the mixer and then add the well-proportioned sodium carboxymethyl cellulose and other additives together. After the preparation is completed, use a high-pressure pump to transport it to the drying tower for spray drying. Because CMC-Na has good solubility, it can be quickly and evenly dissolved in the detergent mixed solution. There is very little insoluble matter in the high-purity CMC-Na and it will not clog the spray nozzle, so it can be widely promoted.

The previous article mainly explained the role of CMC-Na in detergents and completely ignored its use in soaps. However, under such clear conditions as its application in detergents, its use in soaps is very easy to understand. Adding an appropriate amount of sodium carboxymethyl cellulose when making soap has the same advantages as the above-mentioned synthetic detergents, but also makes the soap soft and easy to process and press. CMC-Na can distribute spices and dyes evenly after emulsification and it is an indispensable raw material for making soap.

Sodium carboxymethyl cellulose has a wide range of applications. Whether it is washing powder, soap or detergent, CMC-Na is widely used. Through its application in various industries, we can learn more about the performance of CMC products.



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