Preparation method of chitosan monomolecular layer film

A chitosan single and molecular layer technology, applied in the field of biofilm preparation, can solve the problem of insufficient uniformity of the film, and achieve the effect of improving the uniformity

Inactive Publication Date: 2012-07-25
HENAN UNIVERSITY
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When observed with a nanoscale atomic force microscope, it was found that the morpholog

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  • Preparation method of chitosan monomolecular layer film
  • Preparation method of chitosan monomolecular layer film

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Embodiment Construction

[0022] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific implementations.

[0023] The invention aims at a series of problems faced in the preparation of the chitosan film in the prior art, such as large film thickness and high roughness. A new method for preparing chitosan monolayer films is proposed. This method can not only ensure the monolayer properties of the film, but also keep chitosan molecules in the form of films at the nanometer level. foundation for further research in the field.

[0024] Atomic Force Microscope (AFM) is a high-resolution scanning probe microscope. It is a microscope designed to capture three-dimensional images at high speed based on the principle of scanning tunneling microscope. It usually includes a probe, an electronic control system, and a computer processing system. And photoelectric dete...

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Abstract

The invention relates to a preparation method of a chitosan monomolecular layer film and belongs to the field of biological film preparation. The preparation method of the biological film comprises the following steps of: dissolving chitosan having deacetylation degree of 92% and molecular weight of 114200 daltons into 2% diluted acetic acid so as to prepare a 0.03g/L chitosan solution; carrying out acid catalysis reaction for 24 days at room temperature, then sucking 20 mu L of chitosan solution and dropwise adding the 20 mu L of chitosan solution on a mica plate the area of which is 1cm <2> so that a film is formed after the chitosan solution is freely volatilized; and scanning with an atomic force microscope to obtain feedback information to regulate soaking time, acetic acid concentration and sucked solution dosage to control film quality and coverage area so as to finally prepare the compact and uniform monomolecular layer chitosan film. By using the biological film preparation method, the super-thin monomolecular layer chitosan film can be prepared, and the uniformity of the biological film is ensured. The technical scheme of the invention is suitable for preparation of the biological film.

Description

technical field [0001] The invention relates to the field of film material preparation, in particular to a method for preparing a biological film. Background technique [0002] In the prior art, when preparing chitosan film materials, chitosan is dissolved in 2% acetic acid, cast into a film on flat glass or polyethylene film, and then peeled off after evaporation of the solvent at room temperature to obtain chitosan film. [0003] In the process of realizing the present invention, the inventor finds that the prior art has at least the following shortcoming: when utilizing traditional methods to prepare chitosan films, the chitosan solution usually adopts a concentration of more than 1g / L and a dosage of more than 1mL for thin film preparation. The thickness of this chitosan film is above the order of microns. When observed with a nanoscale atomic force microscope, it was found that the morphology of chitosan molecules was still granular, and the prepared film was not uni...

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Application Information

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IPC IPC(8): C08J5/18C08L5/08C08B37/08
Inventor 刘凯刘波李银丽梁浩
Owner HENAN UNIVERSITY
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