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Green synthesis type wheat gliadin/nano-silver particle of core-shell structure and preparation method and application thereof

A technology of wheat prolamin and nano-silver particles, which is applied in the direction of botany equipment and methods, applications, nanotechnology, etc., can solve the problems of easy aggregation and oxidation of silver nanomaterials, and achieve the purpose of strengthening food and biomedical applications, important social The effect of benefit and economic benefit, good dispersion and stability

Active Publication Date: 2019-04-26
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a method for green synthesis of wheat prolamin / nano-silver particles with core-shell structure, which solves the problem that the silver nano-materials produced by existing methods are easy to aggregate and oxidize

Method used

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  • Green synthesis type wheat gliadin/nano-silver particle of core-shell structure and preparation method and application thereof
  • Green synthesis type wheat gliadin/nano-silver particle of core-shell structure and preparation method and application thereof
  • Green synthesis type wheat gliadin/nano-silver particle of core-shell structure and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] (1) carnosic acid is 95% ethanol solution with volume fraction, is made into the carnosic acid solution that mass concentration is 0.5%; Silver nitrate water is made into concentration and is 5 * 10 -2 mol / L silver nitrate solution;

[0028] (2) 2mL mass concentration is 0.1% wheat prolamin solution (solvent is volume fraction is 70% ethanol solution) is added to 5mL concentration is 5 * 10 -2 mol / L silver nitrate solution in a constant temperature water bath for 10 min, then add 5 mL of carnosic acid solution with a mass concentration of 0.5% to the mixed solution, adjust the pH to 5.0 (adjusted with NaOH), then heat in a constant temperature water bath at 37°C, and react for 60 min , to prepare wheat prolamin / nano-silver particles with core-shell structure. After determination, the ultraviolet-visible spectrum of gained product is as figure 1 shown.

[0029] Ultraviolet-visible spectrum is an important index to characterize the synthesis and stability of wheat prol...

Embodiment 2

[0037] (1) carnosic acid is 95% ethanol solution with volume fraction, is made into the carnosic acid solution that mass concentration is 0.5%; Silver nitrate is made into concentration with distilled water and is 5 * 10 -2 mol / L silver nitrate solution;

[0038] (2) 2mL mass concentration is 0.5% wheat prolamin solution (solvent is volume fraction is 70% ethanol solution) is added to 5mL concentration is 5 * 10 -2 mol / L silver nitrate solution in a constant temperature water bath for 10 minutes, then add 5 mL of carnosic acid solution with a mass concentration of 0.5% to the mixed solution, adjust the pH to 5.0 (adjusted with NaOH), and then heat in a constant temperature water bath at 37°C for 60 minutes , to prepare wheat prolamin / nano-silver particles with core-shell structure.

[0039] After measuring, the ultraviolet-visible spectrogram of gained product is as follows figure 1 shown. The wheat prolamin / nano-silver of this embodiment has good stability, high yield and go...

Embodiment 3

[0041] (1) carnosic acid is 95% ethanol solution with volume fraction, is made into the carnosic acid solution that mass concentration is 0.5%; Silver nitrate is made into concentration with distilled water and is 5 * 10 -2 mol / L silver nitrate solution;

[0042] (2) 8mL mass concentration is 0.1% wheat prolamin solution (solvent is that volume fraction is 70% ethanol solution) is added to 5mL concentration and is 5 * 10 -2 mol / L silver nitrate solution in a constant temperature water bath for 10 minutes, then add 5 mL of carnosic acid solution with a mass concentration of 0.5% to the mixed solution, adjust the pH to 5.0 (adjusted with NaOH), and then heat in a constant temperature water bath at 37°C for 60 minutes , to prepare wheat prolamin / nano-silver particles with core-shell structure.

[0043] After measuring, the ultraviolet-visible spectrum of gained product Figure 4 shown. The wheat prolamin / nano-silver of this embodiment has good stability, high yield and good an...

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Abstract

The invention belongs to the technical field of nanometer materials and discloses a green synthesis type wheat gliadin / nano-silver particle of a core-shell structure and a preparation method and application of the green synthesis type wheat gliadin / nano-silver particle of the core-shell structure. The preparation method comprises the steps that (1) carnosic acid is prepared to be a solution to obtain a carnosic acid solution, and silver nitrate is prepared to be a solution to obtain a silver nitrate solution; (2) a wheat gliadin solution is mixed with the silver nitrate solution, then the carnosic acid solution is added, the pH is adjusted to 3 to 7, a reaction is carried out at a constant temperature, and then the wheat gliadin / nano-silver particle of the core-shell structure is obtained.The preparation method is simple, gentle in condition and environmentally friendly; the prepared wheat gliadin / nano-silver particle has good dispersibility and stability, has a good function of killing escherichia coli and staphylococcus aureus and is free of toxic and side effects, and the prepared wheat gliadin / nano-silver particle can be applied to the fields of antibacterial materials, biosensors and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a green synthetic core-shell structure wheat prolamin / nano-silver particle and a preparation method and application thereof. Background technique [0002] Nanosilver materials have been extensively studied over the years. Nano-silver particles exhibit remarkable and unique properties, such as surface-enhanced Raman scattering, catalysis, biological and medical sensors, and strong broad-spectrum antibacterial activity, and are non-toxic and safe, making them widely used in biomedicine, rapid biological detection, and industrial Catalysis, food safety and other aspects have broad application prospects. The preparation methods of nano-silver reported in the literature generally include chemical methods and physical methods. Among them, the liquid-phase chemical reduction method has become the main method for preparing nano-silver at low cost because of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/02B82Y40/00A01N59/16A01N25/22A01P1/00A61K47/42A61K47/02
CPCA61K47/02A61K47/42A01N25/22A01N59/16B82Y40/00B22F9/24B22F1/102
Inventor 尹寿伟鄢俐杨晓泉
Owner SOUTH CHINA UNIV OF TECH
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