Preparation method of dialdehyde cellulose cross-linked chitosan film

A technology of cross-linking chitosan and cellulose, which is applied in the field of preparation of dialdehyde cellulose cross-linked chitosan film, can solve the problems that there are no reports of dialdehyde cellulose cross-linked chitosan film, and achieve high mechanical The effect of strength, less pollution and simple preparation process
CN106046400AInactive Publication Date: 2016-10-26JIANGNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGNAN UNIV
Publication Date
2016-10-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of a dialdehyde cellulose cross-linked chitosan film, and belongs to the field of natural macromolecule modification. Microcrystalline cellulose is used as raw materials; water-soluble dialdehyde cellulose is respectively prepared through concentrated sulfuric acid hydrolysis and sodium periodate selective oxidization; then, the dialdehyde cellulose water solution is directly mixed with chitosan-acetic acid solution; vacuum defoaming and room temperature casting drying film formation are performed. Compared with a pure chitosan film, the dialdehyde cellulose cross-linked chitosan film prepared by the method provided by the invention has the advantages that the mechanical performance is obviously improved; the swelling degree in the water is obviously reduced.
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Description

technical field

[0001] The invention relates to a preparation method of a dialdehyde cellulose cross-linked chitosan film, which belongs to the field of modification of natural polymers. Background technique

[0002] Chitin widely exists in the shells of insects and crustaceans, as well as in the cell walls of some fungi. It is a biopolymer with reserves second only to cellulose in nature. Chitosan is a deacetylated derivative of chitin, which has good film-forming properties, biocompatibility, biodegradability, antibacterial, hemostatic and wound healing functions. At present, the application of chitosan film in food preservation, drug controlled release, hemodialysis and wound dressing is very attractive. However, the low wet strength limits the wide application of chitosan films in the fields of food packaging and biomedical materials. It has been reported that the mechanical strength of chitosan films can be significantly improved by chemical cross-linking methods. Ex...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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