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Method for preparing biodegradable cellulose hydrogel

A biodegradable and cellulose-based technology, applied in the field of preparation of cellulose-based biodegradable hydrogels, can solve the problems of carcinogenicity, non-chemical reagents, high toxicity of epichlorohydrin, etc., and achieve good biodegradation properties, the preparation process is simple, and the effect of effective utilization is improved

Inactive Publication Date: 2015-02-04
GUANGZHOU FIBER PROD TESTING & RES INST
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Problems solved by technology

However, epichlorohydrin is highly toxic and carcinogenic, and is not a green chemical reagent

Method used

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  • Method for preparing biodegradable cellulose hydrogel
  • Method for preparing biodegradable cellulose hydrogel

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Embodiment Construction

[0018] 1. Preparation of cellulose and CMC solution

[0019] Weigh an appropriate amount of NaOH and urea, dissolve in water, prepare an aqueous solution of 6wt% NaOH / 4wt% urea, and place at -10℃~-20℃ for 2~12h.

[0020] Under stirring, 3wt% cellulose was added to the above-mentioned 6wt% NaOH / 4wt% urea aqueous solution to disperse, and then put into freezing at -10℃~-20℃ for 2~12h. The solution was taken out of the refrigerator and thawed, and was continuously stirred; if the dissolution was insufficient, the above freezing and thawing steps were repeated to obtain a uniform 3wt% cellulose solution.

[0021] Using the same method as above, a 3 wt% CMC solution was prepared.

[0022] According to different requirements, the aqueous solution of NaOH and urea can be configured as an aqueous solution of (6-4) wt% NaOH / (4-6) wt% urea; similarly, cellulose solution and CMC solution may be used in different applications. It can be configured as a 3-5wt% solution.

[0023] 2. Prep...

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Abstract

The invention discloses a method for preparing biodegradable cellulose hydrogel. The method comprises the following steps: preparing a solvent, preparing a cellulose solution and a CMC solution, performing cross-linking reaction, performing after treatment, and the like. The biodegradable cellulose hydrogel prepared by using the method is simple in preparation process, and PEGDE which is widely used in the medicine industry, the food industry and the cosmetics industry is used as a cross-linking agent which is non-toxic and environment-friendly. The prepared hydrogel is very good in biodegradability and is an environment-friendly functional high polymer material.

Description

【Technical field】 [0001] The invention belongs to the field of functional natural polymer materials, in particular to a preparation method of a cellulose-based biodegradable hydrogel. 【Background technique】 [0002] Hydrogel is a functional polymer material that contains strong hydrophilic groups such as hydroxyl, carboxyl, and amino groups and has a certain degree of cross-linking. Hydrogels can absorb and release water according to external environmental stimuli (such as chemical reagents, pH, temperature, etc.), and can be used in many fields such as medical and health care, agriculture and gardening, medicine, tissue engineering and so on. The synthetic materials of hydrogels are mainly synthetic resins, starches and celluloses, as well as natural polymer materials such as polylactic acid, sodium alginate, polyamino acids and proteins. Synthetic resin-based water-absorbing materials, such as polyacrylic acid hydrogels, need to use petroleum-processing derivatives as raw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08L1/26C08J3/24C08J3/075
Inventor 肖敏胡剑灿张黎明张俊钊
Owner GUANGZHOU FIBER PROD TESTING & RES INST
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