Oligochitosan and preparation method thereof

Abstract

The invention relates to the technical field of oligosaccharides, and discloses an oligochitosan. The oligochitosan comprises the following raw materials in parts by weight: 50 parts of shrimp and crab shells, 20-30 parts of hydrochloric acid, 5-7 parts of concentrated sulfuric acid, 4-5 parts of nitric acid, 5-8 parts of nitric acid, 10-20 parts of a sodium hydroxide solution and 30-50 parts of an organic solution. According to the oligochitosan and the preparation method thereof, firstly, the shrimp and crab shells are easy to obtain and low in price from the aspect of material taking, a complex treatment process is not needed, only simple cleaning and grinding are needed and can be completely replaced by machines, more manual operation is not needed, and the labor cost is greatly reduced; and secondly, the reaction environment is very easy to obtain, more energy consumption is not needed, the operation is very environmentally friendly, the cost is further reduced due to extremely low energy consumption, the whole reaction time is short, the production efficiency is greatly improved, the economic benefit is improved, and the effect of low production cost is achieved.

Description

technical field [0001] The invention relates to the technical field of oligosaccharides, in particular to an oligomeric chitosan oligosaccharide and a preparation method thereof. Background technique [0002] Oligochitosan is the only positively charged cationic basic amino oligosaccharide in nature. It is animal cellulose. Oligochitosan is a small molecular oligosaccharide with amino groups that is degraded from chitosan derived from shrimp and crab shells. It is a sugar chain with a degree of polymerization of 2-20. Under acidic conditions, the free amino group in the chitosan oligosaccharide molecule is protonated, and the protonation can interact with the positively charged cell membrane of bacteria, interfering with the function of the bacterial cell membrane, resulting in The loss of cytoplasm can inhibit the growth of fungus and microorganisms. Its antibacterial activity is related to the species and concentration of fungus, and its antibacterial activity increases wi...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the invention provides a kind of oligomeric chitosan and its preparation method, which has the advantages of low production cost and solves the problem that most of the current preparation methods use the prepared chitosan, which is not It is directly prepared from shrimp and crab shells, so the use of ready-made chitosan greatly increases the production cost, and it is necessary to produce chitosan from shrimp and crab shells before the next step can be prepared to produce chitosan oligosaccharides, which increases the production process and takes a long time to use. long, reducing production efficiency