Method of preparing cellulose hydrogel

A technology of cellulose hydrogel and cellulose is applied in the field of preparation of cellulose hydrogel to achieve the effects of reduced cost, non-toxic cost and loose storage conditions

Inactive Publication Date: 2007-08-08
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method of preparing cellulose hydrogel
  • Method of preparing cellulose hydrogel
  • Method of preparing cellulose hydrogel

Examples

Experimental program
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Embodiment 1

[0031] Add 0.8 parts of vacuum-dried wood pulp cellulose into 100 parts of vacuum-dried 1-allyl-3-methylchloroimidazolium salt ionic liquid, heat to 100°C, stir and dissolve for 30 minutes, and obtain transparent and uniform fibers Prime ionic liquid solution; the solution is cooled to room temperature and then poured into a polytetrafluoroethylene mold. After the liquid level of the solution is stable, slowly add a replacement solution configured with water and dimethyl sulfoxide at a volume ratio of 1:1 to cover the Above the cellulose / ionic liquid solution, let the replacement solution and the ionic liquid replace for 10 hours. After forming a gel with a certain hardness, pour out the upper liquid, and replace it with a new replacement solution again. After 3 such replacements , the ionic liquid in the gel was exchanged to obtain a white translucent gel. At this time, the gel was taken out and immersed in a tris buffer solution with a concentration of 0.01 mol / L for 3 hours...

Embodiment 2

[0033] Add 0.1 part of vacuum-dried microcrystalline cellulose to 100 parts of vacuum-dried 1-allyl-3-methyl imidazolium acetate ionic liquid, heat to 70°C, stir and dissolve for 20 minutes to obtain transparent and uniform fibers Elemental ionic liquid solution; the solution is cooled to room temperature and then poured into a polytetrafluoroethylene mold. After the liquid level of the solution is stable, slowly add pure water replacement solution to cover the top of the cellulose / ionic liquid solution, and let the pure water Replace the replacement solution with the ionic liquid for 5 hours. After forming a gel with a certain hardness, pour out the upper liquid, and replace it with a new pure water replacement solution. After 4 times of such replacement, the ionic liquid in the gel is After replacement, a white translucent gel can be obtained. The gel obtained in this example has higher transparency, lower mechanical strength and higher toughness.

Embodiment 3

[0035] Add 4 parts of vacuum-dried microcrystalline cellulose into 100 parts of vacuum-dried 1-allyl-3-methyl imidazolium acetate ionic liquid, heat to 110°C, stir and dissolve for 60 minutes, and obtain transparent and uniform fibers Elemental ionic liquid solution; the solution is cooled to room temperature and then poured into a polytetrafluoroethylene mold. After the liquid level of the solution is stable, slowly add pure water replacement solution to cover the top of the cellulose / ionic liquid solution, and let the pure water Replace the replacement solution with the ionic liquid for 10 hours. After forming a gel with a certain hardness, pour out the upper liquid, and replace it with a new pure water replacement solution again. After two such replacements, put the gel into the ultrasonic generator. In the device, it was replaced under the action of ultrasonic waves for 3 times, each time for 20 minutes, at this time, the ionic liquid in the gel was replaced to obtain a whi...

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Abstract

The invention discloses a making method of cellulose aquagel, which is characterized by the following: dissolving cellulose into ionic liquid; replacing ionic liquid; obtaining the white semi-transparent product.

Description

technical field [0001] The invention belongs to the technical field of hydrogel preparation, and in particular relates to a preparation method of cellulose hydrogel. Background technique [0002] Gels can be divided into hydrogels and organogels. Hydrogels are the most common and important one. Most of the natural gels existing in organisms and plants, as well as many synthetic polymer gels are hydrogels. Hydrogels have a wide range of uses, such as: enrichment and separation of substances, drug release systems, replacement of human organs and tissues, and so on. [0003] Although commonly used substances such as gelatin extracted from animals can form hydrogels, they are sensitive to temperature. When the temperature is high, the hydrogel will turn into a solution, and it is easy to breed microorganisms and cause degradation, so its Applications are subject to certain restrictions. At present, thermally stable hydrogels are mainly polymer hydrogels that form a network s...

Claims

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Application Information

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IPC IPC(8): C08L1/00C08J3/075
Inventor 崔树勋林章碧李露杨潇
Owner SICHUAN UNIV
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