Method for preparing natural cellulose containing zein mixture by using alcoholic solvent

Abstract

The invention discloses a method for preparing a natural cellulose containing zein mixture by using an alcoholic solvent. The method comprises the steps: firstly, at room temperature, adding Zein into an alcoholic aqueous liquid, and stirring to dissolve, so as to prepare a uniform liquid A, of which the mass percent of Zein is 2-15wt%; putting Cellulose into an aqueous liquid, which contains 6-8% of NaOH and 10-14wt% of Urea, at the temperature of -12 to -13 DEG C, and dissolving, so as to prepare a uniform liquid B, of which the mass percent of Cellulose is 0.2-8wt%; and adding the uniform liquid A into the liquid B in a manner of controlling the dry weight ratio of Zein and Cellulose to (10:1) to (2:1) and controlling Zein and Cellulose to account for 1.5-5% of the mass of a mixed liquid, and mixing to dissolve, thereby obtaining a uniform and stable mixed liquid or gel. The mixed liquid or gel can be applied to the industries, such as pharmacy and food, in a manner of being prepared into films.

Description

technical field [0001] The invention relates to a natural cellulose and zein mixture, in particular to a method for preparing the natural cellulose-containing zein mixture by using an alcohol solvent. Background technique [0002] Zein is a kind of protein, which is a by-product of corn processing industry. The molecular weight of Zein is generally between 25,000 and 45,000. It is rich in glutamic acid (21-26%), leucine (20%), proline (10%), alanine (10%), and lacks some Basic and acidic amino acids, such as lysine, aspartic acid, and tryptophan, cannot guarantee nitrogen balance when supplied as food, and the presence of a high proportion of non-polar amino acids and the absence of basic and acidic amino acids affect its solubility properties There are also implications. At the same time, Zein also contains more sulfur-containing amino acids, so Zein needs to be soluble in aqueous alcohol solutions at a certain pH value, and Zein will precipitate in low-concentration salt...

AI Technical Summary

Problems solved by technology

And this technology thinks, when the weight ratio of zein and cellulose is higher than 5:5, it is difficult to form a film, even if the weight ratio of zein and cellulose is 5:5, it is already difficult to form a film; the film prepared by CN101168602A It has good thermal stability, mechanical properties, and biocompatibility, and there is a relatively stable hydrogen bond between the two mixtures, but due to its high cellulose content, its degradation performance is poor, and it is difficult to apply in the field of medicine