Carboxymethyl Cellulose（CMC）
Product Details
Specifications provided
White or yellowish flocculent fiber powder content ≥ 99%
(Scope of application reference ‘product usage’)
It is prepared from cellulose derivatives of carboxymethyl substituents, which are treated with sodium hydroxide to form alkali cellulose, and then reacted with monochloroacetic acid. The glucose unit that makes up cellulose has three replaceable hydroxyl groups, so products with different degrees of replacement can be obtained. When 1mmol carboxymethyl is introduced per 1g dry weight on average, it is insoluble in water and dilute acid, but can swell and be used for ion exchange chromatography. Carboxymethyl pKa, approximately 4 in pure water and 3.5 in 0.5mol/L NaCl, is a weakly acidic cation exchanger, usually used for the separation of neutral and basic proteins at pH > 4. When more than 40% hydroxyl group is carboxymethyl, it can dissolve in water to form a stable colloidal solution with high viscosity.
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Product Parameter
9000-11-7
618-326-2
178.14
Anionic cellulose ethers
1.450 g/cm³
Insoluble in water
527.1℃
274℃
Product Usage
Carboxymethyl cellulose (CMC) is a non-toxic and tasteless white flocculent powder with stable performance and easy to dissolve in water. Its aqueous solution is neutral or alkaline transparent viscous liquid, soluble in other water-soluble adhesives and resins, and insoluble in organic solvents such as ethanol. CMC can be used as binder, thickener, suspension agent, emulsifier, dispersant, stabilizer, sizing agent, etc. Carboxymethyl cellulose (CMC) is the largest yield of cellulose ether, the most widely used, the most convenient product, commonly known as "industrial MSG".
Detergency
1. Sodium carboxymethyl cellulose is a surfactant, which can be used as an anti-fouling re-deposition, which is the dispersant and surfactant of the stain particles, forming a tight adsorption layer on the stain to prevent its re-adsorption on the fiber.
2. When sodium carboxymethyl cellulose is added to the washing powder, the solution can be evenly dispersed and easily adsorbed on the surface of the solid particles, forming a layer of hydrophilic adsorption around the solid particles. Then the surface tension between the liquid and the solid particles is less than the surface tension inside the solid particles, and the wetting effect of the surfactant molecule destroys the cohesion between the solid particles. This disperses the dirt into the water.
3. Sodium carboxymethyl cellulose is added to laundry powder, which has emulsifying effect. After emulsifying oil scale, it is not easy to gather and precipitate on clothing.
4. Sodium carboxymethyl cellulose is added to the laundry powder, which has a wetting effect and can penetrate into the hydrophobic dirt particles, crushing the dirt particles into colloidal particles, so that the dirt is easier to leave the fiber.
Food addition
CMC is widely used in the food industry, in a variety of milk drinks, condiments, plays the role of thickening, stabilizing and improving the taste, in ice cream, bread and pastes, instant noodles and instant pastes and other foods, play the role of forming, improving the taste, retaining water, enhancing toughness and so on. Among them, FH9, FVH9, FM9 and FL9 have good acid stability. Extra high type products have good thickening properties. CMC can successfully solve the problem of solid-liquid separation and precipitation of lactic acid beverage when the protein content is greater than 1%, and can make lactic acid milk have a good taste. The produced lactic milk can maintain stability in the PH range of 3.8-4.2, can withstand pasteurization and 135℃ instantaneous sterilization process, product quality is stable and reliable, and can be stored at normal temperature for more than six months. The original nutritional composition and flavor of yogurt remain unchanged. Ice cream with CMC, can prevent the growth of ice crystals, so that ice cream taste particularly smooth when eating, no sticky, greasy, fat heavy and other bad taste. Moreover, the swelling rate is high, and the temperature resistance and melting resistance are good. CMC for instant noodles makes instant noodles have good toughness, good taste, complete shape, low turbidity of soup, and can also reduce oil content (about 20% lower than the original fuel consumption).
High purity type
Paper grade CMC is used for paper sizing, so that the paper has more high density, good ink permeability, can improve the adhesion between the fibers inside the paper, thereby improving the paper and folding resistance. Improve the internal adhesion of the paper, reduce the printing dust during printing, or even no dust. The paper surface to obtain a good sealing and oil resistance to improve the printing quality. The surface of the paper enhances the luster, reduces the porosity, and plays the role of water retention. It helps to disperse the pigment, prolong the life of the scraper, and provide better fluidity, optical properties and printing adaptability for high solid content formulations.
Toothpaste grade
CMC has good pseudoplasticity, thixotropy and aftergrowth. The paste of the toothpaste is stable, the consistency is suitable, the formability is good, the toothpaste does not water, does not peel, does not coarse, the paste is bright and smooth, delicate, and resistant to temperature change. Good compatibility with various raw materials in toothpaste; It can play a good role in shaping, bonding, moisturizing and fixing fragrance.
Special for ceramics
In ceramic production, they are respectively used in ceramic embryo, glaze paste and floral glaze. Ceramic grade CMC is used as blank binder in ceramic billet to improve the strength and plasticity of the billet. Improve the yield. In the ceramic glaze, it can prevent the precipitation of the glaze particles, improve the adhesion ability of the glaze, improve the bonding of the blank glaze and improve the strength of the glaze layer. It has good permeability and dispersion in the printing glaze, so that the printing glaze is stable and uniform.
Special oilfield
It has the characteristics of uniform substitution molecules, high purity and low dosage, which can improve the efficiency of mud process. Good moisture resistance, salt resistance and alkaline resistance, suitable for the blending and use of saturated salt water and seawater. It is suitable for powder preparation and short thickening time in oil exploitation field. Polyanionic cellulose (PAC-HV) is a highly effective viscosifier with a high pulp yield and the ability to reduce water loss in mud. Polyanionic cellulose (PAC-LV) is a very good fluid loss reducer in mud, which has a particularly good control of water loss in seawater mud and saturated salt water mud. Suitable for mud system with difficult to control solid content and wide range of change. CMC, as a gel fracturing fluid, has the characteristics of good gelatinability, strong sand carrying capacity, rubber breaking capacity and low residue.
