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Composite chitosan and cellulose membrane and preparation method and application thereof

A technology of chitosan cellulose and regenerated cellulose film, applied in chitin polysaccharide coatings, coatings, hyaluronic acid coatings, etc., can solve the problem of poor compatibility and difficult preparation of cellulose/chitosan composite films , antibacterial performance is not significant and other issues, to achieve good biocompatibility and biodegradability, strong anti-infection and blood coagulation, and promote wound healing effects

Inactive Publication Date: 2015-09-09
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In all solvent systems for dissolving cellulose and chitosan, such as trifluoroacetic acid, NaOH / thiourea and N-methylline-N-oxide (NMMO), there are more or less deficiencies or defects, Such as toxic, volatile, difficult to prepare, low recovery rate, poor solubility, large degree of degradation of raw materials, etc.
Moreover, the cellulose / chitosan composite films based on these solvents also have disadvantages such as poor compatibility, poor mechanical properties, or insignificant antibacterial properties.

Method used

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  • Composite chitosan and cellulose membrane and preparation method and application thereof
  • Composite chitosan and cellulose membrane and preparation method and application thereof
  • Composite chitosan and cellulose membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of chitosan cellulose composite film, concrete steps are as follows: with cellulose solvent (sodium hydroxide / urea aqueous solution, wherein the mass concentration of sodium hydroxide is 7%, the mass concentration of urea is 12%, all the other are Water) is pre-cooled to-12 ℃ as the cellulose solvent to dissolve the cellulose to obtain a cellulose solution with a cellulose mass concentration of 4%; the gained cellulose solution is defoamed, removed and cast scraping film, and in the coagulation bath (mass Concentration is 5% sulfuric acid solution) coagulation forming, after washing with distilled water, get the regenerated cellulose film; Under stirring condition, chitosan is dissolved in the acetic acid solution (the mass percentage of acetic acid is 90%), the preparation quality The mass percentage that chitosan accounts for is the chitosan solution of 10%; With the single needle (needle diameter is 0.9mm) as nozzle, and is connected with ...

Embodiment 2

[0036] A kind of preparation method of chitosan cellulose composite film, concrete steps are as follows: (sodium hydroxide / urea aqueous solution, wherein the mass concentration of sodium hydroxide is 10%, the mass concentration of urea is 2%, all the other are water) precooling Dissolving cellulose as a cellulose solvent at -5°C to obtain a cellulose solution with a cellulose mass concentration of 0.5%; the resulting cellulose solution is defoamed, removed and cast scraped film, and in a coagulation bath (mass concentration is 1%) Sulfuric acid solution) coagulated into shape, after washing with distilled water, regenerated cellulose film was obtained; under agitation, chitosan was dissolved in acetic acid solution (the mass percentage of acetic acid was 2%), and the prepared chitosan Accounting for mass percentage is 0.1% chitosan solution; with a single needle (needle diameter is 0.21mm) as the nozzle, and connected with electrostatic spraying device, inhale the above-mention...

Embodiment 3

[0039] A kind of preparation method of chitosan cellulose composite film, concrete steps are as follows: (sodium hydroxide / urea aqueous solution, wherein the mass concentration of sodium hydroxide is 7%, the mass concentration of urea is 12%, all the other are water) precooling Dissolving cellulose as a cellulose solvent at -12°C to obtain a cellulose solution with a cellulose mass concentration of 4%; the resulting cellulose solution is defoamed, removed and cast scraped film, and in a coagulation bath (mass concentration is 5%) Sulfuric acid solution) coagulated into shape, after washing with distilled water, regenerated cellulose film was obtained; under agitation, chitosan was dissolved in acetic acid solution (acetic acid accounted for 50% by mass), and the prepared chitosan Accounting for mass percent is 0.1% chitosan solution; with 2 needles (needle diameter is 0.21mm) as the nozzle, and connected with the electrostatic spray device, inhale the above-mentioned chitosan s...

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Abstract

The invention discloses a composite chitosan and cellulose membrane. A preparation method of the composite chitosan and cellulose membrane includes the steps of 1), precooling a cellulose solvent, adding cellulose into the precooled cellulose solvent with stirring, dissolving to obtain a cellulose solution, subjecting the obtained cellulose solution to defoaming, edulcoration, tape casting and film scraping, coagulating in coagulating bath to shape and performing water scrubbing so as to obtain a regenerated cellulose membrane; 2), dissolving chitosan in a solvent to enable the chitosan to be distributed uniformly; 3), coating a solution obtained in the step 2 on the regenerated cellulose membrane by a needle head in an electrostatic spraying manner so as to obtain the composite chitosan and cellulose membrane. The preparation method is simple, low in cost and free from toxicity and pollution, and the prepared composite chitosan and cellulose membrane is high in biocompatibility and biodegradability, good in anti-infection performance and blood coagulation effect, capable of promoting wound healing and enhancing immunocompetence and easy in functionalized expanding of application fields and can be widely applied to the fields of biological medicine, food industry and the like.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and in particular relates to a chitosan cellulose composite film and a preparation method and application thereof. Background technique [0002] With the increasing global environmental pollution and the rapid consumption of non-renewable resources represented by petroleum, the development and utilization of renewable resources has attracted the attention of many scientific researchers, and has become a way for human beings to seek sustainable development. new direction. A new scientific system of natural polymer materials based on renewable resources is taking shape. In recent years, with the rapid development of membrane science and technology, the use of natural polymer materials instead of petrochemical products to prepare functional membrane materials has attracted great attention. Chitosan is the most abundant natural polymer compound on earth except cellulose (the pr...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J5/18C08L1/02C09D105/08
Inventor 罗晓刚张浩喻发全薛亚楠蔡宁曹珍妮李欢
Owner WUHAN INSTITUTE OF TECHNOLOGY
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