Carboxy methyl cellulose, is a kind of anion, linear, water-soluble cellulose ether, is a natural cellulose with chloroacetic acid by chemical modification. Its aqueous solution has thickening, film forming, bonding, water retention, emulsion, and suspension, colloid protection function, which can be used as flocculating agent, chelating agent, emulsifier, thickener, water retention agent, sizing agent, film forming materials. It also widely used in food, medicine, electronics, chemicals, plastic, printing, ceramics and other fields.
CMC is not only good emulsifying stabilizer and thickener in food application, but also has excellent freezing and melting stability. It can improve the flavor of products and prolong the storage time. CMC can also be used with vinegar, soy sauce, vegetable oil, fruit juice, meat juice, vegetable juice and other stable emulsifying dispersion, the dosage is 0.2% ~ 5%. Especially for animal, vegetable oil, protein and aqueous solution emulsification performance is extremely excellent, can make it form stable homogeneous emulsion. Because of its high safety and reliability, its dosage is not restricted by ADI, the national food hygiene standard. CMC has been continuously developed in the field of food. In recent years, the application of carboxy methyl cellulose in wine production has also been carried out.
In detergents, CMC can be used as anti-fouling redeposition agent, especially for hydrophobic synthetic fabric, which is obviously better than carboxy methyl fiber. CMC can be used to protect oil Wells as mud stabilizer and water retaining agent in oil drilling. Used in textile industry as sizing agent, thickening agent of printing and dyeing pulp, textile printing and stiffening finishing. Used in sizing agent can improve solubility and viscosity, and easy desizing; As a stiffening finishing agent, its dosage is more than 95%; Used as sizing agent, the strength and flexability of sizing film are improved obviously. The results show that when the concentration of CMC solution is about 1.0%(W/V), the chromatographic performance of the prepared thin layer plate is the best. At the same time, the thin layer plate coated under the optimized conditions has appropriate layer strength, which is suitable for various sample adding technologies and convenient to operate.
CMC can also be used as coating anti-sedimentation agent, emulsifier, dispersant, leveling agent, adhesive, can make the solid part of the coating evenly distributed in the solvent, so that the coating is not stratified for a long time, but also a large number of applications in putty. CMC as a flocculant is more effective than sodium gluconate in removing calcium ions, and its exchange capacity can reach 1.6 mL /g when used as cation exchange. CMC is used as sizing agent in papermaking industry, which can obviously improve the dry strength and wet strength of paper, oil resistance, ink absorption and water resistance. As a hydrosol in cosmetics, as a thickener in toothpaste, its dosage is about 5%.