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Linear nano silver and preparation method and application thereof

A wire-shaped nano-silver and wire-shaped technology, which is applied in the field of nanomaterials, can solve the problems of difficulty in preparing wire-shaped nano-silver, complicated post-processing processes, unsuitable for large-scale production, etc., and achieves easy implementation, high yield and low cost. Effect

Active Publication Date: 2013-04-17
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its preparation conditions are harsh, requiring more complex production equipment, inert gas or microwave-assisted heating lamps, etc.; The linear nano-silver is not suitable for mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Add 10g of ethylene glycol, 0.1g of ferric chloride and 1g of PVP into the reaction kettle and mix them, raise the temperature to 180°C while stirring, and continue stirring for 0.5 hours to obtain the reaction solution A; the stirring speed is 10rpm / min;

[0042] (2) Add 4g of glycerol and 0.2g of silver nitrate into the feeding container, and stir evenly to obtain a glycerol solution of silver nitrate;

[0043](3) Add the glycerol solution of silver nitrate in step (2) dropwise to the reaction solution A in step (1) to obtain reaction solution B; the dropping time is 20 minutes;

[0044] (4) Mix 2g of N,N-dimethylformamide and 0.02g of pentanethiol evenly to obtain a thiol substance solution; then add the thiol substance solution dropwise to the step ( 3) In the reaction solution B, stop stirring after the dropwise addition, lower the temperature to room temperature, and obtain the reaction solution C;

[0045] (5) Add 20g of water to the reaction solution C in s...

Embodiment 2

[0047] (1) Add 100g of propylene glycol, 0.1g of sodium chloride and 5g of PEO into the reaction kettle for mixing, heat up to 140°C while stirring, and continue stirring for 2 hours to obtain reaction solution A; the stirring speed is 60rpm / min;

[0048] (2) Add 20g of propylene glycol and 0.1g of silver fluoride into the feeding container and stir evenly to obtain a solution of silver fluoride in propylene glycol;

[0049] (3) Add the propylene glycol solution of silver fluoride in step (2) dropwise to the reaction solution A in step (1) to obtain reaction solution B; the dropping time is 60 minutes;

[0050] (4) Mix 10g of methylpyrrolidone and 0.1g of dodecanethiol evenly to obtain a thiol substance solution; then add the thiol substance solution dropwise to the reaction of step (3) while stirring at the rate of step (3) In liquid B, stop stirring after the dropwise addition, lower the temperature to room temperature, and obtain reaction liquid C;

[0051] (5) Add 20g of ...

Embodiment 3

[0053] (1) Add 50g of diethylene glycol, 0.1g of potassium chloride and 4g of PEG into the reaction kettle and mix them, and heat up to 160°C while stirring, and continue to stir for 1 hour to obtain the reaction solution A; the stirring speed is 30rpm / min ;

[0054] (2) Add 50g of diethylene glycol and 1g of silver perchlorate into the feeding container, and stir evenly to obtain a diethylene glycol solution of silver salt;

[0055] (3) Add the diethylene glycol solution of silver salt in step (2) dropwise to the reaction solution A in step (1) to obtain reaction solution B; the dropping time is 30 minutes;

[0056] (4) Mix 10g dimethyl sulfoxide and 0.8g octadecyl mercaptan evenly to obtain a thiol substance solution; then add the thiol substance solution dropwise to step (3) while stirring according to the dropping speed of step (3) In the reaction solution B, stop stirring after the dropwise addition, lower the temperature to room temperature, and obtain the reaction solu...

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PUM

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Abstract

The invention discloses a linear nano silver and a preparation method and application thereof. The linear nano silver is prepared by solubility silver salt, polyhydric alcohols, inorganic salt and a linear silver guide agent. A sulfur alcohol matter which can easily precipitate from ethylene glycol is added in a nano silver reaction system at a later stage, an alkyl chain can be grafted from a silver surface to enable silver powder to easily precipitate due to the fact that sulfydryl and the silver surface have strong chemical chelation force. The method avoids a centrifugation or ultrasonic method, only needs traditional stirring and precipitating to achieve washing and collecting of the silver powder, simplifies a purification process of the nano silver, improves production efficiency, and simultaneously improves dispersibility of the linear nano silver in a non-polarity organic solvent. The linear nano silver is simple in used equipment, convenient to operate, low in cost and easy to apply, the obtained linear nano silver is high in yield, and the linear nano silver can be applied to industrialization mass production.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a linear nanosilver and its preparation method and application. Background technique [0002] Silver is the metal with the best electrical conductivity. It has good chemical and catalytic properties, excellent antibacterial properties and biocompatibility, so it is widely used in electronics, chemical engineering, biomedicine, medicine, daily necessities and other industries. Silver nanomaterials, due to their small size, large specific surface, and unique physical and chemical properties, can be used as wires and switches in nanoelectronic devices, to develop new conductive or biomedical composite materials, or to develop high-efficiency catalysts, etc. But in addition, silver nanomaterials have optical properties that bulk silver does not have, which makes silver nanomaterials more widely used, and is also highly valued among many nanomaterials. The properties of s...

Claims

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Application Information

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IPC IPC(8): B22F9/24C30B29/02C30B29/62C30B7/14
Inventor 胡继文邹海良于发猛吴丹齐健冉江波刘国军
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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