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Modified cross-linked carboxymethyl cellulose gel and preparation method thereof

A technology of carboxymethyl cellulose and cellulose gel, applied in the field of modified cross-linked carboxymethyl cellulose gel and its preparation, can solve the problem of loss of elastic modulus and yield, limitation of overall gel performance, adjustment Single method and other problems, to achieve the effect of fast water absorption, flexible and diverse adjustment methods, and large water absorption capacity

Active Publication Date: 2021-02-09
IMEIK TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the properties of this gel can only be adjusted by the degree of cross-linking: increasing the degree of cross-linking increases the elastic modulus of the gel, but causes a decrease in water absorption capacity; reducing the degree of cross-linking results in high water absorption capacity, but loses elasticity Modulus and Yield (increase of uncrosslinked carboxymethyl cellulose)
The adjustment method is single, which limits the improvement of the overall performance of the gel

Method used

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  • Modified cross-linked carboxymethyl cellulose gel and preparation method thereof
  • Modified cross-linked carboxymethyl cellulose gel and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] A modified cross-linked carboxymethyl cellulose gel, prepared by the following method:

[0037] (1) Weigh 0.05g of citric acid and 0.20g of succinic acid into 1L of purified water, stir until completely dissolved; then weigh 50g of carboxymethylcellulose and add it, stir for 12 hours to obtain carboxymethylcellulose, lemon A mixed solution of acid and succinic acid, the concentration of carboxymethyl cellulose in the mixed solution is 5%, the content of citric acid is 0.1% of the quality of carboxymethyl cellulose, and the content of succinic acid is the quality of carboxymethyl cellulose 0.4%.

[0038] (2) Pour the above mixed solution into a device with a hydrophobic surface, place it in an electric blast drying oven, and dry it at 60°C to obtain a mixture of carboxymethylcellulose, citric acid and succinic acid.

[0039] (3) The above mixture was placed in an electric blast drying oven, and reacted at 110°C for 12 hours.

[0040] (4) Grind the above reaction produc...

Embodiment 2

[0045] A modified cross-linked carboxymethyl cellulose gel, prepared by the following method:

[0046] (1) Weigh 0.20g of citric acid and 0.20g of succinic acid and add them to 1L of purified water, stir until completely dissolved; then weigh 50g of carboxymethylcellulose and add it, stir for 12 hours to obtain carboxymethylcellulose, lemon A mixed solution of acid and succinic acid, the concentration of carboxymethyl cellulose in the mixed solution is 5%, the content of citric acid is 0.4% of the quality of carboxymethyl cellulose, and the content of succinic acid is the quality of carboxymethyl cellulose 0.4%.

[0047] (2) Pour the above mixed solution into a device with a hydrophobic surface, place it in an electric blast drying oven, and dry it at 60°C to obtain a mixture of carboxymethylcellulose, citric acid and succinic acid.

[0048] (3) The above mixture was placed in an electric blast drying oven, and reacted at 110°C for 12 hours.

[0049] (4) Grind the above reac...

Embodiment 3

[0054] A modified cross-linked carboxymethyl cellulose gel, prepared by the following method:

[0055] (1) Weigh 0.40g of citric acid and 0.20g of succinic acid into 1L of purified water, stir until completely dissolved; then weigh 50g of carboxymethylcellulose and add it, stir for 12 hours to obtain carboxymethylcellulose, lemon A mixed solution of acid and succinic acid, the concentration of carboxymethyl cellulose in the mixed solution is 5%, the content of citric acid is 0.8% of the quality of carboxymethyl cellulose, and the content of succinic acid is the quality of carboxymethyl cellulose 0.4%.

[0056] (2) Pour the above mixed solution into a device with a hydrophobic surface, place it in an electric blast drying oven, and dry it at 60°C to obtain a mixture of carboxymethylcellulose, citric acid and succinic acid.

[0057] (3) The above mixture was placed in an electric blast drying oven, and reacted at 110°C for 12 hours.

[0058] (4) Grind the above reaction produc...

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Abstract

The invention belongs to the technical field of biomedical materials, and relates to modified cross-linked carboxymethyl cellulose gel and a preparation method thereof. The gel is prepared by taking carboxymethyl cellulose as a raw material, citric acid as a cross-linking agent and succinic acid as a modifier through reaction. The carboxymethyl cellulose accounts for more than 90% of the total mass of the gel, the content of the cross-linking agent accounts for 0.1-2% of the mass of the carboxymethyl cellulose, and the content of the modifier accounts for 0.1-2% of the mass of the carboxymethyl cellulose. The gel has the advantages of being high in water absorption speed, large in water absorption capacity, high in elasticity modulus and the like; and more flexible and diverse performanceadjustment modes are provided so as to meet different application requirements. In addition, the gel is safe, non-toxic, green, environment-friendly and suitable for the field of biomedical materials.

Description

technical field [0001] The invention relates to a modified cross-linked carboxymethyl cellulose gel and a preparation method thereof, belonging to the technical field of biomedical materials. Background technique [0002] Carboxymethyl Cellulose is a water-soluble cellulose ether obtained by chemically modifying natural cellulose. It is currently the cellulose ether product with the largest output and widest application. Due to its poor water solubility due to its acidic structure, it usually exists in the form of sodium salt. Carboxymethyl cellulose is widely used as a binder, thickener, suspending agent, emulsifier, dispersant, stabilizer, sizing agent, etc. In the field of biomedicine, it can be used as a binder, disintegrating agent, suspending agent, etc. of drugs, and can also be used in medical dressings, medical films, etc. [0003] After carboxymethyl cellulose is cross-linked, carboxymethyl cellulose gel can be obtained. Carboxymethyl cellulose gel has the chara...

Claims

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Application Information

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IPC IPC(8): C08L1/28C08K5/11C08K5/092C08J3/24C08J3/075
CPCC08J3/24C08J3/075C08J2301/28C08K5/11C08K5/092
Inventor 李亦晨曹满
Owner IMEIK TECH DEV CO LTD
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