Carboxymethyl cellulose (CMC) is a non-toxic and tasteless white flocculent powder with stable performance and is easily soluble in water. Its aqueous solution is a neutral or alkaline transparent viscous liquid. It is soluble in other water-soluble glues and resins, but insoluble in organic solvents such as ethanol.
Carboxymethyl cellulose (CMC) is a non-toxic and tasteless white flocculent powder with stable performance and is easily soluble in water. Its aqueous solution is a neutral or alkaline transparent viscous liquid. It is soluble in other water-soluble glues and resins, but insoluble in organic solvents such as ethanol. CMC can be used as an adhesive, thickener, suspending agent, emulsifier, dispersant, stabilizer, sizing agent, etc.
Sodium carboxymethyl cellulose (CMC) is the product with the largest output, the widest application, and the most convenient use among cellulose ethers. It is commonly known as "industrial MSG".
1. Used in oil and natural gas drilling, well digging and other projects
① Mud containing CMC can form a thin and hard filter cake with low permeability on the well wall, reducing water loss.
② After adding CMC to the mud, the drilling rig can obtain a low initial shear force, making it easy for the mud to release the gas wrapped in it, and at the same time quickly abandon the debris in the mud pit.
③ Drilling mud, like other suspended dispersions, has a certain existence period. Adding CMC can make it stable and prolong its existence period.
④ Mud containing CMC is rarely affected by mold, so it is not necessary to maintain a high pH value or use preservatives.
⑤ CMC is used as a drilling mud washing fluid treatment agent to resist pollution from various soluble salts.
⑥ Mud containing CMC has good stability and can reduce water loss even at temperatures above 150°C.
High-viscosity and high-substitution CMC is suitable for mud with lower density, while low-viscosity and high-substitution CMC is suitable for mud with higher density. The selection of CMC should be determined according to different conditions such as mud type, region, and well depth.
2. Used in textile and printing and dyeing industries. The textile industry uses CMC as a sizing agent for sizing light yarns of strong materials such as cotton, silk, wool, chemical fibers, and blended fabrics;
3. Used in the papermaking industry. CMC can be used as a paper surface smoothing agent and sizing agent in the papermaking industry. Adding 0.1% to 0.3% CMC to pulp can increase the tension resistance of paper by 40% to 50%, increase the compression bursting degree by 50%, and increase the kneading property by 4 to 5 times.
4. CMC can be used as a dirt adsorbent when added to synthetic detergents; daily chemicals such as toothpaste industry CMC glycerol aqueous solution is used as the gum base of toothpaste; pharmaceutical industry is used as a thickener and emulsifier; CMC aqueous solution is used as flotation beneficiation after viscosity increase.
5. It can be used in the ceramic industry as an adhesive, plasticizer, glaze suspension, color fixative, etc. for blanks.
6. Used in construction to improve water retention and strength
7. Used in the food industry. The food industry uses high-replacement CMC as a thickener for ice cream, canned food, instant noodles, a foam stabilizer for beer, etc., and as a thickener, binder or shaper in the processing of jam, syrup, fruit dew, snacks, ice cream beverages, etc.
8. The pharmaceutical industry selects CMC with appropriate viscosity as a tablet binder, disintegrant, and suspending agent for suspensions.
The high-end alternative to carboxymethyl cellulose (CMC) is polyanionic cellulose (PAC), which is also an anionic cellulose ether with a higher degree of substitution and uniformity of substitution, a shorter molecular chain, and a more stable molecular structure. Therefore, it has better salt resistance, acid resistance, calcium resistance, high temperature resistance, and other properties, and its solubility is also enhanced. It can be used in all industries where carboxymethyl cellulose (CMC) can be used, providing better stability and meeting higher process requirements.
