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Method for preparing ultramicro nanomodified chellotosan

A chitosan and nanotechnology, which is applied in the field of ultra-micron and nano-modified chitosan production methods, can solve the problem that the product cannot be applied to the research and development and application of cosmetics or medical and health products, and cannot be effectively expanded. Market size, lack of fibroblast activity, etc.

Inactive Publication Date: 2010-06-30
ACELON CHEM & FIBER
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Problems solved by technology

[0002] Chitosan is a very important material for the application of antibacterial agents or biomedical materials. Therefore, industries, academic institutions, and research institutions in various countries have spared no effort to invest a lot of resources to start the production of modified chitosan and related derivatives. However, chitosan has limited antibacterial activity against microorganisms and does not have fibroblast activity, so that the research and development applications are limited to the improvement of antibacterial properties, wound dressings (coagulation, healing effect and antibacterial properties). Considerable resources have been invested, and the ultramicronization technology of chitosan also has a certain amount of technical research and development energy in academic and research institutions. development potential
[0003] In view of the limitations of chitosan due to its antibacterial properties and inhibition of skin fibroblasts, the application of chitosan in cosmetics or medical hygiene is quite limited, and the application in the textile industry cannot effectively expand the market size, which also makes the This product cannot cross over to the R&D and application of cosmetics or medical and health products in different industries

Method used

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  • Method for preparing ultramicro nanomodified chellotosan
  • Method for preparing ultramicro nanomodified chellotosan
  • Method for preparing ultramicro nanomodified chellotosan

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Embodiment Construction

[0040] A method for preparing ultramicronized modified chitosan of the present invention, the steps include:

[0041] (a). Degrade high molecular weight chitosan (chitosan) into medium and low molecular weight chitosan; the purpose is to improve the antibacterial properties of chitosan, and the preparation method is to dissolve chitosan in dilute acid In a certain reaction temperature, use different reaction time to degrade chitosan to obtain chitosan with different medium and low molecular weights. The example of this preparation is shown in Example [1]:

[0042] Embodiment [one]:

[0043] Dissolve chitosan with a high molecular weight (Mw) of 573200 in dilute hydrochloric acid (HCl) at a reaction temperature of 70°C, and then use different reaction times such as 0.5 hours, 1 hour, 2 hours, and 4 hours Under certain conditions, chitosan can be degraded to obtain chitosan with different molecular weights, as shown in the following list [A]:

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Abstract

The invention relates to a method for preparing ultramicro nanomodified chellotosan, which comprises the following steps of: degrading high molecular weight chellotosan into medium and low molecular weight chellotosans by using a molecular weight control technology; carrying out primary micronized modification on the medium and the low molecular weight chellotosans by using a quaternary ammonium salt technology; and finally preparing the ultramicro nano chellotosan by using a sol-gel method. The modified ultramicro nano chellotosan becomes a material with favorable biological compatibility and biological activity promoting effect; and after being added into products on aspects of cosmetics, medical treatment, hygiene, biomedicine, agriculture, textile, foods, and the like, the modified ultramicro nano chellotosan has dual benefits of low manufacture cost and easy mass production in addition to improve the effects of odor removing performance, moisture retention and antibiotic property.

Description

【Technical field】 [0001] The invention relates to a method for preparing ultramicronized modified chitosan, which uses molecular weight control technology, quaternary ammonium salinization technology and sol-gel method to prepare ultramicronized modified chitosan Chitosan makes it more effective in deodorization, moisture retention and antibacterial properties, and is conducive to expanding the scope of application of products provided to related industries. 【Background technique】 [0002] Chitosan is a very important material for the application of antibacterial agents or biomedical materials. Therefore, industries, academic institutions, and research institutions in various countries have spared no effort to invest a lot of resources to start the production of modified chitosan and related derivatives. However, chitosan has limited antibacterial activity against microorganisms and does not have fibroblast activity, so that the research and development applications are limi...

Claims

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Application Information

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IPC IPC(8): C08B37/08C08J3/03C08L5/08
Inventor 周文东赖明毅黄坤山陈玮骏
Owner ACELON CHEM & FIBER
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