Cellulose/chitosan composite pellet as well as preparation method and application thereof

A technology of cellulose and chitosan, applied in chemical instruments and methods, alkali metal compounds, other chemical processes, etc., can solve the problems of poor mechanical strength, chitosan dissolved in acid, etc., to reduce production costs and high solubility , the effect of a wide range of sources

Inactive Publication Date: 2015-04-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings and deficiencies of the prior art, the primary purpose of the present invention is to provide a preparation method of cellulose / chitosan composite beads; the preparation method not only retains the adsorption properties of chitosan and cellulose, but also Solved the problems of chitosan being dissolved in acid and having poor mechanical strength;

Method used

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  • Cellulose/chitosan composite pellet as well as preparation method and application thereof
  • Cellulose/chitosan composite pellet as well as preparation method and application thereof
  • Cellulose/chitosan composite pellet as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A kind of cellulose / chitosan composite pellet, its preparation method is as follows:

[0042] (1) Dissolve 1.0g of α-cellulose in 20g of ionic liquid 1-ethyl-3-methylimidazolium acetate ([Emim]Ac) in a conical flask, and stir magnetically for 3 hours in an oil bath at 110°C Completely dissolve the cellulose to obtain a transparent cellulose solution;

[0043] (2) In another conical flask, dissolve 1.0g of chitosan in 20g of ionic liquid 1-ethyl-3-methylimidazole acetate ([Emim]Ac), and stir magnetically in an oil bath at 70°C 2h makes chitosan dissolve completely, obtains transparent chitosan solution;

[0044] (3) Mix the above-mentioned cellulose dissolving solution with the chitosan dissolving solution, and stir magnetically for 1 hour under an oil bath at 110° C. until it becomes a pale yellow uniform mixed solution;

[0045] (4) Pack the obtained mixed solution into a medical syringe, then push the mixed solution into an absolute ethanol coagulation bath to obtai...

Embodiment 2

[0051] A kind of cellulose / chitosan composite pellet, its preparation method is as follows:

[0052] (1) Dissolve 0.5g of α-cellulose in 20g of ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) in a conical flask, and stir magnetically for 3.5 hours in an oil bath at 100°C. h completely dissolves the cellulose to obtain a transparent cellulose solution;

[0053] (2) In another conical flask, dissolve 1.0g of chitosan in 20g of ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl), stir with magnetic force under 80°C oil bath 1.5h makes chitosan dissolve completely, obtains transparent chitosan solution;

[0054] (3) Mix the above-mentioned cellulose dissolving solution with the chitosan dissolving solution, and stir magnetically for 1 hour in an oil bath at 120° C. until it becomes a pale yellow uniform mixed solution;

[0055] (4) The obtained mixed solution is packed into a medical syringe, and then the mixed solution is pushed into a deionized water coag...

Embodiment 3

[0060] A kind of cellulose / chitosan composite pellet, its preparation method is as follows:

[0061] (1) Dissolve 0.3g of α-cellulose in 20g of ionic liquid 1-ethyl-3-methylimidazolium acetate ([Emim]Ac) in a conical flask, stir magnetically for 3.5 h completely dissolves the cellulose to obtain a transparent cellulose solution;

[0062] (2) In another conical flask, dissolve 0.6g of chitosan in 15g of ionic liquid 1-ethyl-3-methylimidazole acetate ([Emim]Ac), under 90°C oil bath, magnetically stir 1h makes chitosan dissolve completely, obtains transparent chitosan solution;

[0063] (3) Mix the above-mentioned cellulose dissolving solution with the chitosan dissolving solution, and stir magnetically for 1.5 h in an oil bath at 110° C. until it becomes a pale yellow uniform mixed solution;

[0064] (4) The obtained mixed solution is packed into a medical syringe, and then the mixed solution is pushed into a DMSO coagulation bath to obtain a gel-state composite bead; the prep...

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Abstract

The invention belongs to the field of natural high polymer material preparation and application, discloses a cellulose / chitosan composite pellet as well as a preparation method thereof and an application thereof in traditional liquid medicine discoloring. The preparation method for the cellulose / chitosan composite pellet comprises the following steps: by taking an ionic liquid as a solvent, respectively dissolving the cellulose and the chitosan into the solvent, heating and stirring until the cellulose and the chitosan are completely dissolved; then, mixing a cellulose dissolved solution with a chitosan dissolved solution, heating and cross-linking until the mixed solution is changed into a light yellow and uniform liquid; dropwise adding the mixed solution into a coagulating bath drop by drop, thereby obtaining a gel-state composite pellet; soaking the gel-state composite pellet, taking out and washing the soaked gel-state composite pellet to obtain a product cellulose / chitosan composite pellet. The preparation method disclosed by the invention is cheap in whole reaction process, easy to perform and environmentally friendly; the obtained cellulose / chitosan composite pellet has a good adsorption effect on pigments in an aqueous extract solution of Chinese herbal medicines such as purple leaves, momordica grosvenori, smoked plums and honeysuckles, and has a wide application prospect in the purifying field of the Chinese herbal medicine liquid.

Description

technical field [0001] The invention belongs to the field of preparation and application of natural polymer materials, and in particular relates to a cellulose / chitosan composite pellet, a preparation method thereof and an application in decolorization of traditional Chinese medicine liquid. Background technique [0002] Chitosan and cellulose as biodegradable materials of natural polymers are a very important field in material science. Because of their diverse constituents, special structures, and excellent properties, they have been used as potential biomaterials and biodegradable materials for diverse applications. Chitosan molecules contain a large number of hydroxyl groups and amino groups. It is a natural cationic flocculant and a coagulant. It can remove impurity suspended particles in the liquid medicine through charge neutralization and molecular chain bridging, and at the same time inhibit the activity of the medicine. There is no loss of ingredients, and the pric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08J3/12C08L5/08C08L1/02B01J20/24B01J20/28B01D15/08
CPCY02P20/54
Inventor 王兆梅李满凤李冰洁
Owner SOUTH CHINA UNIV OF TECH
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