G-C3N4 nano-fiber antibacterial film and preparation method and application thereof

A technology of nanofibers and antibacterial membranes, applied in the field of preparation of g-C3N4 nanofiber antibacterial membranes, which can solve the problems of reducing the utilization rate of nanoparticles, easy aggregation and decline, etc.

Inactive Publication Date: 2017-08-11
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, g-C 3 N 4 When nanoparticles are directly sprayed on the surface of food, it is easy to aggregate and drop, which reduces the utilization rate of nanoparticles

Method used

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  • G-C3N4 nano-fiber antibacterial film and preparation method and application thereof
  • G-C3N4 nano-fiber antibacterial film and preparation method and application thereof
  • G-C3N4 nano-fiber antibacterial film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1g-C 3 N 4 Antibacterial experiment of nanofiber antibacterial film against Escherichia coli

[0021] 1 Experimental materials

[0022]

[0023] 2 Experimental Standard Strains

[0024] Escherichia coli

[0025] 3 Experimental methods

[0026] 1) g-C 3 N 4 preparation of

[0027] ① Weigh 10g of urea, put it in a crucible, cover it, and put it in a vacuum tube furnace;

[0028] ②Adjust the calcination temperature and time: raise the temperature to 550°C at a rate of 5°C / min, then calcinate at 550°C for 4 hours, cool to room temperature, and obtain g-C as a light yellow solid 3 N 4 , ground into powder for later use.

[0029] 2) g-C 3 N 4 Preparation of nanofiber antibacterial film

[0030] ① According to the standard of mass volume concentration 0.5% (W / V, g / mL), g-C 3 N 4 The nanoparticles were added into a polyethylene oxide solution with a concentration of 10 wt% (g / g), and magnetically stirred for 24 hours to prepare a spinning precursor sol...

Embodiment 2

[0050] Example 2g-C 3 N 4 Antibacterial experiment of nanofiber antibacterial film against Staphylococcus aureus

[0051] 1 Experimental materials

[0052]

[0053] 2 Experimental Standard Strains

[0054] Staphylococcus aureus (S.aureus)

[0055] 3 Experimental methods

[0056] 1) g-C 3 N 4 preparation of

[0057] ① Weigh 10g of urea, put it in a crucible, cover it, and put it in a vacuum tube furnace;

[0058] ②Adjust the calcination temperature and time: raise the temperature to 550°C at a rate of 5°C / min, then calcinate at 550°C for 4 hours, cool to room temperature, and obtain g-C as a light yellow solid 3 N 4 , ground into powder for later use.

[0059] 2) g-C 3 N 4 Preparation of nanofiber antibacterial film

[0060] ① According to the standard of 0.5% (W / V, g / mL) in mass volume concentration, g-C 3 N 4 The nanoparticles were added into a polyethylene oxide solution with a concentration of 10 wt% (g / g), and magnetically stirred for 24 hours to prepare ...

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Abstract

The invention belongs to the field of antibacterial fresh-keeping packing materials of foods, and particularly relates to a preparation method and application of a g-C3N4 nano-fiber antibacterial film. Firstly, urea serves as a raw material, g-C3N4 nano-particles with a loose and porous structure is synthesized through a high-temperature calcination method, and then the synthesized g-C3N4 nano-particles are added into an electrostatic spinning solution and prepared into the nano-fiber film which is excellent in performance. The g-C3N4 nano-fiber antibacterial film is dried for 4 hours in a drying oven, then sterilized for 2 hours under an ultraviolet lamp, and processed with cold plasma at 500 W for 2 min for standby. The preparation process is good in reproducibility, the g-C3N4 nano-particles are uniformly distributed, the product modality of the fiber antibacterial film is complete, and the fiber antibacterial film is good in stability and antibacterial property.

Description

technical field [0001] The invention belongs to the field of food antibacterial and fresh-keeping packaging materials, in particular to a g-C 3 N 4 Preparation method and application of nanofiber antibacterial film. Background technique [0002] At present, the problem of food contamination is relatively serious, and various antibacterial substances are constantly produced. The new g-C 3 N 4 Nano-inorganic antibacterial materials have received widespread attention from the society. g-C 3 N 4 It is the most stable material of all carbon nitride allotropes, with obvious layered structure. g-C 3 N 4 Not only has high hardness and high elasticity, but also has high chemical stability, thermal stability, excellent electrical conductivity and mechanical properties, etc., and has good application prospects in the fields of environment, energy and chemical industry. g-C 3 N 4 It also has good bactericidal performance, and because of its advantages of safety, greenness and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4282D04H1/4291D04H1/728D01D5/00D01F1/10D06M10/02D06M16/00C12Q1/06C12Q1/18
CPCD04H1/4282C12Q1/06C12Q1/18D01D5/003D01D5/0076D01D5/0092D01F1/103D04H1/4291D04H1/728D06M10/025D06M16/00
Inventor 林琳吴修亮崔海英
Owner JIANGSU UNIV
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