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Wheat prolamin/nano-silver particles with green synthetic core-shell structure and its preparation method and application

A wheat gliadin and nano-silver particle technology, which is applied in the field of nano-material preparation, can solve the problems of easy aggregation and oxidation of silver nano-materials, and achieves enhanced food and biomedical applications, important social and economic benefits, and high production efficiency. Effect

Active Publication Date: 2020-12-22
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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  • Wheat prolamin/nano-silver particles with green synthetic core-shell structure and its preparation method and application
  • Wheat prolamin/nano-silver particles with green synthetic core-shell structure and its preparation method and application
  • Wheat prolamin/nano-silver particles with green synthetic core-shell structure and its preparation method and application

Examples

Experimental program
Comparison scheme
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 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. 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 pro...

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 synthetic core-shell structure wheat prolamin / nano-silver particle and a preparation method and application thereof. Methods: (1) make carnosic acid into solution to obtain carnosic acid solution; make silver nitrate into solution to obtain silver nitrate solution; (2) mix wheat prolamin solution with silver nitrate solution, then add sage tail The oxalic acid solution is adjusted to a pH of 3 to 7, and reacted at a constant temperature to obtain wheat prolamin / nano-silver particles with a core-shell structure. The method of the invention is simple, the conditions are mild, and it is green and environment-friendly; the prepared wheat prolamin / nano-silver particles have good dispersibility and stability, and have good bactericidal effect on Escherichia coli and Staphylococcus aureus and have no toxic and side effects , can be applied to antibacterial materials, biosensors and other fields.

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 Patents(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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