Carboxymethyl cellulose is a substituted product of carboxymethyl group in cellulose. According to its molecular weight or degree of substitution, it can completely dissolve or insoluble polymers, and can be used as a weak acid cation exchanger to separate neutral or basic proteins.
Carboxymethyl cellulose can form high-viscosity colloid, solution, adhesion, thickening, flow, emulsification and dispersion characteristics; it has the characteristics of water retention, protective colloid, film forming, acid resistance, salt resistance, suspension, etc., and is physiologically harmless And other characteristics, widely used in food, medicine, daily chemical, petroleum, paper, textile, construction and other fields.
Sodium carboxymethyl cellulose (CMC) is the largest, most widely used and most convenient product among cellulose ethers, commonly known as “industrial monosodium glutamate”!
CMC with high viscosity and high substitution degree is suitable for low-density mud, and CMC with low viscosity and high degree of substitution is suitable for high-density mud. The choice of CMC should be determined according to the type, area and well depth of mud.
A high-end alternative to carboxymethyl cellulose (CMC) is polyanionic cellulose (PAC), which is also an anionic cellulose ether with a high degree of substitution and uniformity. The molecular chain is shorter and the molecular structure is more stable. It has good salt resistance, acid resistance, calcium resistance, high temperature resistance and other properties, and the solubility has also been improved.
Carboxymethyl cellulose can be used in all industries, and carboxymethyl cellulose (CMC) can provide better stability and meet higher process requirements.