Method for measuring crust amine and chitin content in crust amine fibre and cotton blending product

Abstract

The invention discloses a chitosan and chitin content measurement method in the chitosan fiber and cotton blended products. Acetic acid solution is used to separate the chitosan fiber on the blended product, and the chitosan content in the dissolved solution is measured through colloidal titration so as to obtain the chitosan content in the chitosan fiber and the cotton blended product; the chitosan fiber and the cotton blended product are treated with a sufficient amount of concentrated alkali to enable the chitin in the chitosan fiber to be fully converted into chitosan; then the chitosan content in the chitosan fiber and the cotton blended product after alkali treatment is measured according to the method for measuring the chitosan, and the chitosan content in the chitosan fiber and the cotton blended product is deducted from the measured chitosan content so as to obtain the chitin content in the chitosan fiber and the cotton blended product. The chitosan and chitin content measurement method has high measurement precision and accuracy, small toxicity of the reagent, less environmental pollution and easy operation, which provides a convenient, scientific and feasible detectionmethod for the vast number of small and medium-sized enterprises and primary inspection agencies.

Description

technical field The invention relates to a method for determining the content of chitosan and chitin in chitosan fiber and cotton blended products. Background technique Chitosan is the deacetylation product of chitin, and a new type of functional fiber—chitosan fiber can be produced by wet spinning chitosan. Chitosan fiber is the only positively charged regenerated fiber in nature, which has considerable biological activity (such as excellent antibacterial, deodorant, excellent moisture absorption, moisturizing and biocompatibility properties), can help wound healing, and effectively protect human skin. However, chitosan fibers are expensive and are mainly used in the production of medical textiles such as surgical sewing thread, burns on human skin, gauze for scalds, and bandages. Blending chitosan fiber with cotton, through the corresponding dyeing and finishing process, on the premise of ensuring the function of the blended product, the production cost of chitosan textil...

AI Technical Summary

Problems solved by technology

Although this method is simple, there are two defects: first, the solvent formic acid is more toxic, which is not conducive to environmental protection; second, both chitosan and chitin can be dissolved in formic acid or acetic acid solution, and it cannot effectively characterize chitosan and chitin The specific content, only the total content of the two

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