A kind of method utilizing self-vibration cavitation to prepare oligomeric chitosan

A chitosan oligosaccharide and self-vibration cavitation technology, which is applied in the preparation field of chitosan oligosaccharides, can solve problems such as difficult to achieve efficient energy utilization, and achieve the effects of increased degradation rate, high efficiency, and low energy consumption

Active Publication Date: 2018-07-06
GUANGXI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cavitation bubble collapses quickly and cannot be fully grown before collapsing, so it is difficult to realize efficient utilization of energy

Method used

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  • A kind of method utilizing self-vibration cavitation to prepare oligomeric chitosan
  • A kind of method utilizing self-vibration cavitation to prepare oligomeric chitosan
  • A kind of method utilizing self-vibration cavitation to prepare oligomeric chitosan

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Embodiment

[0030] Embodiment: a kind of method utilizing self-vibration cavitation to prepare oligomeric chitosan comprises the following steps:

[0031] The first step: dissolving chitosan: adding high-molecular-weight chitosan into a solvent and dissolving it to form a chitosan solution, the solvent being one of an aqueous solution of inorganic acid, an aqueous solution of organic acid or a slightly acidic buffer solution, Wherein, the mass concentration of the described inorganic acid aqueous solution or organic acid aqueous solution is 1%-13%, the pH of the buffer solution is 3-5, and the mass concentration of the chitosan solution is 0.5g / L- 5g / L, the relative molecular mass of the high molecular weight chitosan is greater than 2×10 6 , the degree of deacetylation is greater than 60%; the inorganic acid is hydrochloric acid, the organic acid is formic acid, acetic acid, lactic acid or citric acid, and the buffer solution is acetic acid-sodium acetate or citric acid-sodium citrate; ...

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Abstract

The invention relates to a method for preparing oligochitosan through self-resonating cavitation. The method is characterized in that self-resonating cavitation degradation is adopted, that is, a chitosan solution is subjected to self-resonating cavitation degradation treatment in a self-resonating cavitation device; the self-resonating cavitation device comprises a thermostatic water-bath circulation water tank, a storage tank, a pump, a self-resonating cavitation device, a pipeline for conveying the chitosan solution, a pressure gauge and a valve; the technological process of self-resonating cavitation degradation is as follows: the chitosan solution is stored in the storage tank, subjected to thermostatic treatment by the circulation water tank and conveyed by the pump to the self-resonating cavitation device for cavitation degradation, the pressure of an inlet is adjusted by the valve, the pressure is monitored by the pressure gauge, and the chitosan solution subjected to cavitation degradation flows back to the storage tank. The degradation rate by using the method is at least 40% higher than that by using a hydrodynamic cavitation device (venturi tube) to prepare oligochitosan at present, and the method has the characteristics of simplicity, easiness, low energy consumption, high efficiency and the like and has the advantage of mass industrial application.

Description

technical field [0001] The invention relates to a preparation method of low poly-chitosan, in particular to a method for preparing low poly-chitosan by self-vibration cavitation. Background technique [0002] Generally, chitosan obtained by deacetylation of chitin has a large molecular weight and a compact crystal structure. It is insoluble in common solvents and can only be dissolved in some acidic media, which greatly limits the application of chitosan. limit. In addition, studies have shown that the properties of chitosan with different relative molecular weights are very different, and sometimes even show diametrically opposite characteristics. Many specific functions of chitosan can only be manifested when the relative molecular weight is reduced to a certain extent. The oligomeric water-soluble chitosan obtained by degrading chitosan has unique and superior physiological activity and physicochemical properties, and has a wide range of application fields and developmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/08
CPCC08B37/003
Inventor 黄永春杨锋李利军许佳丽任仙娥黄承都黄琼谢清若张昆明
Owner GUANGXI UNIVERSITY OF TECHNOLOGY
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