A macro-preparation method of polyvinylpyrrolidone-modified nano-silver wire powder

A technology of polyvinylpyrrolidone and nano-silver wire, applied in nanotechnology, metal processing equipment, transportation and packaging, etc., can solve the problems of poor powder dispersibility, complex production process, complex process, etc., and achieve good dispersion and good repeatability , The effect of simple process

Active Publication Date: 2020-07-07
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the mixed solvent used in this method is less safe under high temperature conditions, and special treatments such as centrifugation and spray drying are required to obtain nano-silver wire powder, and the process is complicated.
[0005] At present, most methods need to use special equipment such as spray drying in the process of obtaining nano-silver wire powder. The production process is complicated, the cost is high, and the dispersibility of the powder is poor.

Method used

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  • A macro-preparation method of polyvinylpyrrolidone-modified nano-silver wire powder
  • A macro-preparation method of polyvinylpyrrolidone-modified nano-silver wire powder
  • A macro-preparation method of polyvinylpyrrolidone-modified nano-silver wire powder

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Effect test

Embodiment 1

[0027] (1) At room temperature, in the dark, 1.36g of silver nitrate was dissolved in 80mL of ethylene glycol to obtain an ethylene glycol solution of silver nitrate; at room temperature, 2.16mg of ferric chloride hexahydrate and 1.34g of polyethylene Pyrrolidone (PVP) is successively dissolved in 80mL of ethylene glycol to obtain an ethylene glycol solution containing polyvinylpyrrolidone, and the two solutions are simultaneously added to the container under stirring.

[0028] (2) Put the above mixed solution in a 200mL hydrothermal reaction kettle, and heat it in an oven at 160°C for 12 hours;

[0029] (3) After naturally cooling to room temperature, the precipitate is taken out, vacuum filtered to dryness, and ethylene glycol and PVP on the surface of the precipitate are washed away with acetone and ethanol;

[0030] (4) Dry the filter cake in step (3) in a blast drying oven at 60° C. for 2 hours to obtain a PVP-modified silver nano wire powder.

[0031] The powder prepare...

Embodiment 2

[0034] (1) Dissolve 0.68g of silver nitrate in 40mL of ethylene glycol under dark conditions to obtain an ethylene glycol solution of silver nitrate; dissolve 1.08mg of ferric chloride hexahydrate and 0.89g of polyvinylpyrrolidone in ethylene glycol In 40mL of alcohol, the ethylene glycol solution containing polyvinylpyrrolidone was obtained, and the two solutions were simultaneously added to the container under stirring.

[0035] (2) Put the above mixed solution in a 100mL hydrothermal reaction kettle, and heat it in an oven at 160°C for 12 hours;

[0036] (3) After naturally cooling to room temperature, the precipitate is taken out, vacuum filtered to dryness, and ethylene glycol and PVP on the surface of the precipitate are washed off with acetone and ethanol in turn;

[0037] (4) The filter cake in step (3) was vacuum-dried in a vacuum oven at 60° C. for 2 hours to obtain a PVP-modified silver nano wire powder.

[0038] Such as figure 2 As shown, the diameter of the nan...

Embodiment 3

[0040] (1) In the dark, dissolve 0.68g of silver nitrate in 40mL of ethylene glycol to obtain an ethylene glycol solution of silver nitrate; successively dissolve 0.7mg of sodium chloride and 0.89g of polyvinylpyrrolidone in 40mL of ethylene glycol , to obtain an ethylene glycol solution containing polyvinylpyrrolidone, and to simultaneously add the two solutions into the container while stirring.

[0041] (2) Put the above mixed solution in a 100mL hydrothermal reaction kettle, and heat it in an oven at 160°C for 8 hours;

[0042] (3) After naturally cooling to room temperature, the precipitate is taken out, vacuum filtered to dryness, and ethylene glycol and PVP on the surface of the precipitate are washed off with acetone and ethanol in turn;

[0043] (4) The filter cake in step (3) was vacuum-dried in a vacuum drying oven at 60° C. for 2 hours to obtain a PVP-modified silver nano wire powder.

[0044] The nano-silver wire prepared by the invention can be dispersed in wate...

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Abstract

A macro-preparation method of polyvinylpyrrolidone-modified nano-silver wire powder, comprising uniformly mixing an ethylene glycol solution of silver nitrate, a chloride-containing salt, and polyvinylpyrrolidone in ethylene glycol to obtain a mixed solution; wherein, silver nitrate, The molar ratio of chloride salt to PVP is 1:(0.0001~0.0006):(1.5~2); the mixed solution is hydrothermally reacted at 160~200°C for 8~12 hours, cooled, vacuum filtered until dry, washed and dried to obtain Polyvinylpyrrolidone modified nano silver wire powder. The invention has simple process, good repeatability, no special equipment such as spray drying, and can prepare nano-silver wire powder in a large amount. It makes up for the shortcomings of current nano-silver wire products that are not easy to preserve and the preparation process of nano-silver wire powder is complicated.

Description

technical field [0001] The invention belongs to the technical field of nano-material production technology, and relates to a macro-preparation method of polyvinylpyrrolidone-modified nano-silver wire powder. Background technique [0002] Nanosilver wire is an important one-dimensional nanomaterial with stable physical and chemical properties, and has excellent performance in the fields of optoelectronics, catalysis, and antibacterial. For example, in the field of transparent conductive films, due to the high cost of ITO, nano silver wires have become an effective substitute for ITO to prepare transparent conductive films due to their high electrical conductivity and high light transmittance. [0003] At present, the preparation method of silver nanowires is mainly based on the polyol method proposed by Xia Younan et al. The process is stable and the research is more in-depth. The method mainly uses polyols as reducing agents to synthesize silver nanowires under the induction...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/0547
Inventor 马建中卫林峰张文博祝茜
Owner SHAANXI UNIV OF SCI & TECH
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