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Preparation method of graphene oxide/bacterial cellulose antibacterial compound material

A technology of bacterial cellulose and composite materials, applied in the field of composite materials, can solve problems such as affecting application and development, no antibacterial properties, etc., and achieve the effects of superior antibacterial properties, easy operation and simple process

Inactive Publication Date: 2014-10-01
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although bacterial cellulose has many excellent properties, it has no antibacterial properties, which affects its application and development in the field of medical dressings

Method used

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  • Preparation method of graphene oxide/bacterial cellulose antibacterial compound material
  • Preparation method of graphene oxide/bacterial cellulose antibacterial compound material
  • Preparation method of graphene oxide/bacterial cellulose antibacterial compound material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Yeast extract (5 g / L), glucose (5 g / L), potassium dihydrogen phosphate (1 g / L), magnesium sulfate heptahydrate (15 g / L) and peptone (5 g / L) were prepared into 100 mL of seed culture base and 200mL of fermentation medium without adjusting the pH. Put the seed medium and fermentation medium into a sterilizing pot at a temperature of 121° C. and a pressure of 0.1 MPa, and sterilize for 20 minutes. After cooling the culture medium, add ethanol (20 mL / L). The activated Acetobacter xylinum was inoculated into the seed medium, and cultured in a shaker at 30° C. and 160 rpm / min for 24 h. According to the inoculum amount of 6% (volume ratio, all can be in the range of 5-10%), the seed culture liquid is inoculated into the fermentation medium, fully shaken to make it mix evenly, and then cultured at 30±2°C for 1-2 weeks, A milky white bacterial cellulose film was obtained. Rinse the residues on the surface of bacterial cellulose with deionized water, soak in 0.1M NaOH solution,...

Embodiment 2

[0029] The method is the same as in Example 1, except that the bacterial cellulose homogeneous suspension and the graphene oxide solution are mixed at a volume ratio of 100:1, stirred evenly and ultrasonically treated to form a homogeneous mixture. The mixture was subjected to -0.1MPa negative pressure filtration, and finally vacuum freeze-dried at -80°C to obtain a graphene oxide / bacterial cellulose composite material.

Embodiment 3

[0031] The method is the same as in Example 1, except that the bacterial cellulose homogeneous suspension is mixed with the graphene oxide solution at a volume ratio of 200:3, stirred evenly, and ultrasonically treated to form a homogeneous mixture. The mixture was subjected to -0.1MPa negative pressure filtration, and finally vacuum freeze-dried at -80°C to obtain a graphene oxide / bacterial cellulose composite material.

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Abstract

The invention discloses a preparation method of a graphene oxide / bacterial cellulose antibacterial compound material. The preparation method comprises the following steps: (1) inoculating activated bacterial cellulose into a seed medium to culture, then, inoculating the activated bacterial cellulose into a fermentation medium according to an inoculum size of 5-10%, and after fully and uniformly mixing, putting in a constant-temperature culture box at 30+ / -2 DEG C, standing and fermenting for 1-2 weeks to obtain a bacterial cellulose wet film; (2) after alkali-washing the bacterial cellulose wet film, pulping to a homogeneous phase suspension liquid by virtue of a mechanical method; (3) mixing a graphene oxide solution with the bacterial cellulose homogeneous phase suspension liquid, and carrying out ultrasonic dispersion to prepare a homogeneous phase mixed liquid; (4) decompressing and filtering the homogeneous phase mixed liquid, and freezing and drying to separate the graphene oxide / bacterial cellulose antibacterial compound material. The preparation method of the graphene oxide / bacterial cellulose antibacterial compound material disclosed by the invention is simple, few in step and easy to operate, and the prepared graphene oxide / bacterial cellulose antibacterial compound material has excellent antibacterial performance and can be widely applied to the fields such as medical dressing and artificial skins.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a graphene oxide / bacterial cellulose antibacterial composite material. Background technique [0002] Graphene consists of carbon atoms with sp 2 Composed of hybridized monoatomic layers, it is the thinnest two-dimensional material found so far. This special structure makes it contain many peculiar physical and chemical properties, such as high specific surface area and excellent thermal conductivity, mechanical properties and Electron transfer capability. Graphene oxide (Graphene Oxide, GO) is a derivative of graphene. It is a single-layer or multi-layer graphite oxide formed by the exfoliation of graphite oxide. It has a typical quasi-two-dimensional space structure, and its sheets contain many Oxygen-containing groups have high specific surface energy, good hydrophilicity and mechanical properties, and good dispersion stability in water and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08K9/00C08K3/04C12P19/04A61L15/28A61L15/44A61L27/44A61L27/54A61L27/60C12R1/02
Inventor 邵伟刘晖张蕤汪贵斌
Owner NANJING FORESTRY UNIV
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