Carboxymethylcellulose sodium (CMC-Na) is an organic substance, a carboxymethylated derivative of cellulose, and the most important ionic cellulose gum. Sodium carboxymethyl cellulose is usually an anionic polymer compound prepared by reacting natural cellulose with caustic alkali and monochloroacetic acid, with a molecular weight ranging from several thousand to millions. CMC-Na is white fibrous or granular powder, odorless, tasteless, hygroscopic, easy to disperse in water to form a transparent colloidal solution.
When neutral or alkaline, the solution is a high-viscosity liquid. Stable to medicines, light and heat. However, the heat is limited to 80°C, and if heated for a long time above 80°C, the viscosity will decrease and it will be insoluble in water.
Sodium carboxymethyl cellulose is also a kind of thickener. Due to its good functional properties, it has been widely used in the food industry, and it has also promoted the rapid and healthy development of the food industry to a certain extent. For example, due to its certain thickening and emulsifying effect, it can be used to stabilize yogurt drinks and increase the viscosity of yogurt system; because of its certain hydrophilicity and rehydration properties, it can be used to improve the consumption of pasta such as bread and steamed bread. quality, prolong the shelf life of pasta products and enhance the taste.
Because it has a certain gel effect, it is beneficial to the food to form a gel better, so it can be used to make jelly and jam; it can also be used as an edible coating material, compounded with other thickeners, and spread On some food surfaces, it can keep the food fresh to the greatest extent, and because it is an edible material, it will not cause adverse effects on human health. Therefore, food-grade CMC-Na, as an ideal food additive, is widely used in food production in the food industry.
Hydroxyethylcellulose (HEC), chemical formula (C2H6O2)n, is a white or light yellow, odorless, non-toxic fibrous or powdery solid, composed of alkaline cellulose and ethylene oxide (or chlorohydrin) Prepared by etherification reaction, it belongs to non-ionic soluble cellulose ethers. Because HEC has good properties of thickening, suspending, dispersing, emulsifying, binding, film forming, protecting moisture and providing protective colloid.
Easily soluble in water at 20°C. Insoluble in common organic solvents. It has the functions of thickening, suspending, binding, emulsifying, dispersing, and maintaining moisture. Solutions in different viscosity ranges can be prepared. Has exceptionally good salt solubility for electrolytes.
The viscosity changes slightly in the range of PH value 2-12, but the viscosity decreases beyond this range. It has the properties of thickening, suspending, binding, emulsifying, dispersing, maintaining moisture and protecting colloid. Solutions in different viscosity ranges can be prepared.