Natural cellulose is the most widely distributed and most abundant polysaccharide in nature, with very rich sources.Current cellulose modification techniques mainly focus on both etherification and esterification.Carboxymethylation reaction is a type of etherification technique.After carboxymethylation of cellulose is obtained from carboxymethyl cellulose (CMC), its aqueous solution has the functions of thickening, film formation, adhesion, water retention, colloidal protection, emulsification and suspension, etc.
It is widely used in oil, food, medicine, textile and paper making and other industries, and is one of the most important cellulose ethers. Basic introduction Carboxymethylcellulose (CarboxvmethvlCellulose, CMC) is a commonly used food additive, its sodium salt (sodium carboxymethyl cellulose) is commonly used as an adhesive, paste. Sodium carboxymethyl cellulose dissolution method: hot water boiled but the amount can not be more do not open 0.5% -0.7% carboxymethyl cellulose sodium solution to take 0.5g of sodium carboxylmethyl cellulose solution, add water 100ml, heat and boil, until completely dissolved.
Add a small amount of water to supplement the evaporation amount before boiling.(1) Self-made thin layer of thin layer coated with carboxymethylcellulose sodium water solution (0.2% -0.5%) into an appropriate paste uniform coated dry glass plate.For the first time, take 1.85g of silica gel, 5ml of sodium carboxymethyl cellulose solution, and put milk in a bowl.The rest were treated with 1.11g of silicone each time, carboxy The aqueous solution of methylcellulose sodium was 3ml.Grinding in the same direction for no bubble, mucus can be linear.
Chemical name: sodium carboxymethyl cellulose, also known as carboxymethyl cellulose English full name: Carboxylmethyl Cellulose English abbreviation: CMC Molecular formula: [C6H7O2 (OH) 2CH2COONa]