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14

2022

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02

The 18th Food Ingredients Exhibition (IFT) in the United States came to a successful conclusion


  Generally, the higher the average degree of polymerization of the sodium carboxymethyl cellulose raw material, the lower the reactivity, the lower the average degree of polymerization, the higher the reactivity, the distribution of the degree of polymerization is relatively narrow and the polydispersity (low) fibers have good Responsive performance, where aggregation is low (dp < 200), and parts with too much content will be the main performance drop in response. However, it is polymerized to a certain extent, and its effect on the reaction rate is not large.
  There are three types of structural units in the molecular chain of sodium carboxymethyl cellulose, namely lowering unit; intermediate unit; (3) reducing unit. The cuts on this machine contain an additional paraben. The reducing end unit, which is a hemiacetal, has a reducing power that is sensitive to various oxidants and can be oxidized to a carboxylic acid, which 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 fiber is determined by the main properties of the middle. unit. The change of the degree of polymerization of cellulose from the etherification reaction process is not large, so the distribution of the degree of ether polymerization of the product mainly depends on the distribution of the degree of polymerization of the original sodium carboxymethyl cellulose of the material.