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Preparation method of graphene antibacterial composite film, prepared antibacterial composite film

A graphene and composite membrane technology, applied in the field of composite materials, can solve the problems of environmental hazards, dangerous chemical reagents, high toxicity, etc., and achieve the effects of short time consumption, simple reaction and mild conditions

Active Publication Date: 2022-02-11
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the preparation of the graphene antibacterial composite material in the prior art involves dangerous chemical reagents, which are highly toxic and cause certain harm to the environment

Method used

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  • Preparation method of graphene antibacterial composite film, prepared antibacterial composite film
  • Preparation method of graphene antibacterial composite film, prepared antibacterial composite film
  • Preparation method of graphene antibacterial composite film, prepared antibacterial composite film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation of graphene antibacterial composite film comprises the following steps:

[0044] (1) Preparation of graphene oxide aqueous solution: put into about 40ml concentrated sulfuric acid (98%) in flask, 1g flake graphite is first stirred at room temperature for one hour and it is fully mixed, then the mixture is placed in an ice bath, Slowly add 3g of potassium permanganate and react for 1h. Then the reaction system was transferred to an oil bath and reacted at 45° C. for 1 h. The temperature was raised to 85°C, and 85ml of water was slowly added dropwise, and then about 30ml of hydrogen peroxide was added, and the stirring was continued until no obvious bubbles were generated, and the reaction was completed. The product was washed with 5% hydrochloric acid and filtered, and finally purified by dialysis with a dialysis bag, and then freeze-dried at -50°C for 12 hours. The solid product was dispersed in water and ultrasonicated at 40KW for 2 hours to obtain a f...

Embodiment 2

[0055] The preparation of graphene antibacterial composite film comprises the following steps:

[0056] (1) Preparation of graphene oxide aqueous solution: put about 80ml of concentrated sulfuric acid (98%) in the flask, stir 2g flake graphite at room temperature for 1h to make it fully mixed, then place the mixture in an ice bath, slowly add 6g potassium permanganate, react for 1h. Then the reaction system was transferred to an oil bath and reacted at 45° C. for 1 h. The temperature was raised to 85°C, and 85ml of water was slowly added dropwise, and then about 40ml of hydrogen peroxide was added, and the stirring was continued until no obvious bubbles were generated, and the reaction was completed. The product was washed with 5% hydrochloric acid and filtered, and finally purified by dialysis with a dialysis bag, and then freeze-dried at -50°C for 12 hours. The solid product was dispersed in water and ultrasonicated at 40KW for 2 hours to obtain a final concentration of abo...

Embodiment 3

[0063] The preparation of graphene antibacterial composite film comprises the following steps:

[0064] (1) Preparation of graphene oxide aqueous solution: put about 60ml of concentrated sulfuric acid (98%) in the flask, stir 1.5g flake graphite at room temperature for one hour and make it fully mixed, then place the mixture in an ice bath , Slowly add 4.5g potassium permanganate, react for 1h. Then the reaction system was transferred to an oil bath and reacted at 45° C. for 1 h. The temperature was raised to 85°C, and 85ml of water was slowly added dropwise, and then about 35ml of hydrogen peroxide was added, and the stirring was continued until no obvious bubbles were generated, and the reaction was completed. The product was washed with 5% hydrochloric acid and filtered, and finally purified by dialysis with a dialysis bag, and then freeze-dried at -50°C for 12 hours. The solid product was dispersed in water and ultrasonicated at 40KW for 2 hours to obtain a final concentr...

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Abstract

The invention discloses a preparation method of a graphene antibacterial composite film, which relates to the technical field of composite materials. The invention comprises the following steps: (1) adding silver nitrate powder to a graphene oxide aqueous solution, and ultrasonically obtaining a graphene oxide / silver nitrate composite film Materials; (2) disperse the graphene oxide / silver nitrate composite material on the bacterial cellulose membrane to obtain the bacterial cellulose / graphene oxide / silver nitrate composite membrane; (3) treat the bacterial fiber with plasma in an inert protective gas After the plain / graphene oxide / silver nitrate composite film was washed with deionized water and dried naturally, the graphene antibacterial composite film was obtained. The present invention also provides a graphene antibacterial composite film prepared by the above-mentioned preparation method. Composite material film, strong stability, no need for other treatment, ready-to-use.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a graphene antibacterial composite film and the prepared antibacterial composite film. Background technique [0002] Bacterial cellulose is a general term for biodegradable cellulose synthesized by bacteria under different conditions. As an environmentally friendly and renewable biopolymer material, it has great commercial value and good development prospects. Compared with natural plant cellulose, bacterial cellulose has: (1) high water holding capacity and high air permeability; (2) good biocompatibility and degradability; (3) high chemical purity and controllability; (4) The advantages of high tensile strength, elastic modulus and controllability during synthesis. These excellent properties make bacterial cellulose widely used in the fields of biomedicine, papermaking and cosmetics. [0003] Although bacterial cellulose has many excellent p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N59/16A01P1/00C08J7/12C08L1/02C08K3/04C08K3/08C12P19/04C12R1/02
CPCA01N59/16C08J7/12C08J7/123C12P19/04C08J2301/02C08K3/042C08K2003/0806
Inventor 黄青刘超赵云梦方草
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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