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Graphene oxide / silver complex antibacterial material and preparation method thereof

An antibacterial material, graphene technology, applied in botany equipment and methods, fungicides, chemicals for biological control, etc., can solve the problems of poor slow-release performance of antibacterial materials and inability to exert antibacterial effects for a long time. To achieve the effect of prolonging antibacterial performance, enhancing stability and improving stability

Active Publication Date: 2014-08-13
CHANGZHOU MYSUN BIOLOGICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention overcomes the deficiencies in the prior art that antibacterial materials have poor slow-release performance and cannot exert antibacterial effects for a long time, and provides a graphene oxide / silver complex antibacterial material and a preparation method thereof

Method used

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  • Graphene oxide / silver complex antibacterial material and preparation method thereof

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Embodiment 1

[0018] (1) Pre-preparation of the graphene oxide aqueous solution: the deoxidized graphene powder is dispersed in deionized water, and the graphene oxide dispersion is obtained through ultrasonic sufficient exfoliation, and the mass fraction of graphene oxide in the graphene oxide dispersion is controlled to be 0.05%, and then Add N-methylpyrrolidone to it, the volume ratio of its dosage and deionized water is 0.5:1, and then mix thoroughly by ultrasonic;

[0019] (2) Preliminary complexation of silver source and organic and inorganic complexes: dissolve silver nitrate in water, then add sodium sulfite to it, control the molar ratio of sodium sulfite and silver nitrate to 1.2:1, the reaction time is 2h, the reaction temperature Silver complexes are obtained at 10°C;

[0020] (3) the graphene oxide aqueous solution that step (1) obtains is mixed with the silver complex that step (2) obtains, and in described graphene oxide aqueous solution, graphene oxide and silver complex mas...

Embodiment 2

[0022] (1) Pre-preparation of the graphene oxide aqueous solution: the deoxidized graphene powder is dispersed in deionized water, and the graphene oxide dispersion is obtained through ultrasonic sufficient exfoliation, and the mass fraction of graphene oxide in the graphene oxide dispersion is controlled to be 0.5%, and then Pyridine is added thereto, the volume ratio of its consumption and water is 10:1, and then thoroughly mixed through ultrasonic;

[0023] (2) Preliminary complexation of silver source and organic and inorganic complexes: dissolve silver nitrate in water, then add sodium citrate to it, control the molar ratio of sodium citrate and silver nitrate to 0.8:1, and the reaction time is 5h, the reaction temperature was 25°C to obtain the silver complex;

[0024] (3) the graphene oxide aqueous solution that step (1) obtains is mixed with the silver complex that step (2) obtains, and in described graphene oxide aqueous solution, graphene oxide and silver complex mas...

Embodiment 3

[0026] (1) Pre-preparation of the graphene oxide aqueous solution: the deoxidized graphene powder is dispersed in deionized water, and the graphene oxide dispersion is obtained through ultrasonic sufficient exfoliation, and the mass fraction of graphene oxide in the graphene oxide dispersion is controlled to be 0.3%, and then Add pyrrolidone therein, the volume ratio of its consumption and water is 8.5:1, then thoroughly mix through ultrasonic;

[0027] (2) Preliminary complexation of silver source and organic and inorganic complexes: dissolve silver nitrate in water, then add sodium sulfite to it, control the molar ratio of sodium sulfite and silver nitrate to 1.0:1, the reaction time is 4h, the reaction temperature Silver complexes are obtained at 15°C;

[0028] (3) the graphene oxide aqueous solution that step (1) obtains is mixed with the silver complex that step (2) obtains, and in described graphene oxide aqueous solution, graphene oxide and silver complex mass ratio are...

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Abstract

The present invention relates to a graphene oxide / silver complex antibacterial material, the material is a chelate of silver organic or inorganic complex with graphene oxide. The structure formula of the material is as shown in the specification. The preparation method for the graphene oxide / silver complex antimicrobial material comprises the following steps: (1) dispersing graphene oxide powder into deionized water, obtaining a graphene oxide dispersion by ultrasonic fully releasing, adding a large pi bond water-soluble organic substance into the graphene oxide dispersion and mixing completely with ultrasound; (2) dissolving silver nitrate in water and adding sodium sulfite or sodium citrate into the solution to obtain a silver complex after the reactions; and (3)mixing the graphene oxide water solution obtained in step (1) with the silver complex obtained in step (2), and after the reaction, filtering the solution to obtain a precipitate. The stability of the graphene oxide is enhanced by combining small molecules formed by silver and the organic or inorganic complex with the graphene oxide. The anti-bacterial property is prolonged through a slow release performance.

Description

technical field [0001] The invention relates to the field of antibacterial materials, in particular to a graphene oxide / silver antibacterial material and a preparation method thereof. Background technique [0002] Worldwide, the upsurge in the research and application of graphene continues to surge, and there has never been a material that has attracted as much attention in various fields as graphene. [0003] According to data retrieval at home and abroad, the current research on graphene / silver composites is limited to literature reports. The Physical Biology Laboratory of Shanghai Institute of Applied Physics, Chinese Academy of Sciences found that graphene oxide nanosuspensions had a negative effect on E. coli after 2 hours of incubation. Its inhibition rate exceeds 90%. The antibacterial properties of graphene oxide stem from its destruction of the cell membrane of Escherichia coli, while graphene oxide produces little cytotoxicity to mammalian cells. In summary, comp...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N59/00A01P1/00A01P3/00
Inventor 唐沁宇纪俊玲彭勇刚汪媛董健
Owner CHANGZHOU MYSUN BIOLOGICAL MATERIALS
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