The 18th American Food Ingredients Exhibition (IFT) ended successfully
Generally, the sodium carboxymethyl cellulose raw material has a higher average degree of polymerization, low reaction performance, lower average polymerization degree, higher reaction performance, and a relatively narrow polydispersity (low) fiber distribution. The response performance, where the aggregation is low (DP < 200), and the portion of too much content will be the main performance degradation response. However, it is polymerized to a certain extent, and its influence on the reaction rate is not large.
There are three types of carboxymethyl cellulose sodium molecular chain structural units, the unit is reduced; the intermediate unit; (3) the reducing unit. The cut on this unit contains an extra p-hydroxybenzene. The reducing terminal unit, which is a hemiacetal, has a reducing ability, is sensitive to various oxidizing agents, can be oxidized to a carboxylic acid, and can be used to determine the number average molecular weight of cellulose (end). The middle part, all of which are dehydrated glucose units, because the degree of polymerization of cellulose is usually very high, so although the end groups have an effect on the chemical reaction of cellulose, the formed cotton fibers are determined by the main properties in the middle. unit. Since the degree of polymerization of cellulose is the most etherification reaction process, the ether polymerization degree distribution of the product mainly depends on the polymerization degree distribution of the original sodium carboxymethyl cellulose of the material.