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Preparation method of water-soluble silver nanoparticles

A silver nanoparticle, water-soluble technology, applied in nanotechnology and other directions, can solve the problems of high equipment requirements and high production costs, and achieve the effect of improving strength and toughness, stable quality and small particle size

Active Publication Date: 2018-04-13
河南科斗新材料研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The principle of the physical method is simple, and the resulting products have few magazines and good quality, but they have high requirements for equipment and expensive production costs
The chemical method is relatively simple, but it has higher requirements for particle size control

Method used

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  • Preparation method of water-soluble silver nanoparticles
  • Preparation method of water-soluble silver nanoparticles

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Embodiment

[0036] A preparation method of water-soluble silver nanoparticles, comprising the following steps:

[0037] (1) Synthesis of star macromolecular initiator 21Br-β-CD:

[0038] Take 6.82g of β-cyclodextrin, dry it at 80°C for 12h under vacuum, then dissolve it in 60mL of N-methylpyrrolidone at room temperature, put it in an ice-water bath, and cool it to 0°C. Under this condition, Add 58g of 2-bromoisobutyryl bromide dropwise within 2h. After the dropwise addition, warm up to room temperature and continue to react for 24h to obtain a brown solution. Concentrate by distillation under reduced pressure, add 100mL of dichloromethane to dilute, and wash with 100mL of saturated aqueous sodium bicarbonate solution and 100 mL of deionized water were washed three times each, and the obtained organic phase was dried with anhydrous magnesium sulfate, then concentrated with a rotary evaporator, and finally precipitated in n-hexane below -20°C to obtain a white precipitate, which was dried i...

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Abstract

The invention discloses a preparation method of water-soluble silver nanoparticles. Beta-cyclodextrin serves as an initial reaction raw material and is synthesized into a macroinitiator after being subjected to modification; a ATRP technology and a technology by combining the ATRP and click chemistry are adopted, so that a multiple-arm star-shaped block copolymer is prepared; and a solution phasesynthesis method serves as a basis, the multiple-arm star-shaped block copolymer serves as a single molecule micelle template, and the water-soluble silver nanoparticles with uniform size and good dispersion are prepared. According to the Ag nanoparticles prepared through the preparation method of the water-soluble silver nanoparticles, the quality is stable, the sizes of the particles are uniform, the particles can be stabilized in the nanometer grade, and exerting of properties of the Ag nanoparticles can be effectively ensured; and the surfaces of the Ag nanoparticles are modified so that the Ag nanoparticles can be uniformly dispersed in water to avoid the aggregation effect.

Description

technical field [0001] The invention relates to a preparation method of water-soluble silver nano particles, belonging to the technical field of inorganic nano material synthesis. Background technique [0002] Nanomaterials are generally called nanomaterials that have one or more dimensions in the range of 1-100 nm or are composed of them as basic units, which is roughly equivalent to the scale where 10-100 atoms are closely arranged together. Nano-silver is a simple substance of metallic silver with a particle size of nanometer scale. Studies have shown that nano-silver has a strong inhibitory and killing effect on dozens of pathogenic microorganisms such as Escherichia coli, Neisseria gonorrhoeae, and Chlamydia trachomatis, and will not produce drug resistance. Cotton socks made of nano-silver and combed cotton fibers have good antibacterial and deodorizing effects. And because of its good conductivity, it occupies an extremely important position in the field of microele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00C08G81/02C08F251/00C08F220/18
CPCB22F9/24B82Y40/00C08F251/00C08G81/025C08F220/1804
Inventor 裴东杰吴斌刘刚于航
Owner 河南科斗新材料研究院有限公司
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