Method for preparing length-diameter-ratio nano-silver wire by pH-value regulation solvothermal method

A nano-silver wire and solvothermal technology, applied in the field of nano-silver wire material preparation, can solve the problems of high aspect ratio, non-uniformity, and many impurities, and achieve high aspect ratio, low cost, and good length uniformity. Effect

Inactive Publication Date: 2012-01-04
JIANGSU NANOWELL ADVANCED MATERIALS SCI&TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of this invention is to provide a method for preparing silver nanowires with high aspect ratio. The prepared silver nanowire material not only has a high aspect ratio, but also has high yield, less impurities, good thickness and length uniformity, and overcomes the The preparation process of traditional polyol method is complex and the microwave method has the disadvantages of many impurities and unevenness

Method used

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  • Method for preparing length-diameter-ratio nano-silver wire by pH-value regulation solvothermal method
  • Method for preparing length-diameter-ratio nano-silver wire by pH-value regulation solvothermal method
  • Method for preparing length-diameter-ratio nano-silver wire by pH-value regulation solvothermal method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Carry out according to preparation process: configure following solution:

[0043] A: concentration is the silver nitrate ethylene glycol solution of 0.2mol / L;

[0044] B: concentration is the ethylene glycol solution of polyvinylpyrrolidone whose K value is 30 of 0.4mol / L;

[0045] C: the concentration is: the ethylene glycol solution of the manganese chloride of 0.01mol / L;

[0046] D: concentrated nitric acid;

[0047] Take 1000 parts by volume of A, 1000 parts by volume of B, 25 parts by volume of C, and 1 part by volume of D solution and mix them thoroughly to form the final mixed solution. Move the mixed solution to the reaction kettle and place it at the preset temperature After reacting in an oven at 140°C for 2 hours, the reaction kettle was taken out and cooled to room temperature. To obtain the mother liquor of silver nanowires, add 1000 volumes of alcohol to the mother liquor to dilute and remove the upper clear night at a speed of 3000rpm to obtain a prec...

Embodiment 2

[0050] Carry out according to preparation process: configure following solution

[0051] A: concentration is the silver acetate glycol solution of 0.2mol / L;

[0052] B: the ethylene glycol solution of the polyvinylpyrrolidone whose K value is 90 that concentration is 0.4mol / L;

[0053] C: Concentration is: the ethylene glycol solution of ferric chloride of 0.01mol / L;

[0054] D: concentrated nitric acid;

[0055] Take 500 parts by volume of A, 800 parts by volume of B, 20 parts by volume of C, and 1 part by volume of D solution and mix them thoroughly to form the final mixed solution. Move the mixed solution to the reaction kettle and place it at the preset temperature After reacting in an oven at 160°C for 2 hours, the reaction kettle was taken out and cooled to room temperature. To obtain the mother liquor of silver nanowires, add 500 volumes of alcohol to the mother liquor to dilute and then remove the upper clear night at a speed of 3000rpm to obtain a precipitate, whic...

Embodiment 3

[0057] Carry out according to preparation process: configure following solution

[0058] A: concentration is the silver nitrate ethylene glycol solution of 0.2mol / L;

[0059] B: concentration is the ethylene glycol solution of polyvinylpyrrolidone whose K value is 30 of 0.4mol / L;

[0060] C: the concentration is: the ethylene glycol solution of the sodium chloride of 0.01mol / L;

[0061] D: concentrated hydrochloric acid;

[0062] Take 200 parts by volume of A, 250 parts by volume of B, 20 parts by volume of C, and 1 part by volume of D solution and mix them thoroughly to form the final mixed solution. Move the mixed solution to the reaction kettle and place it at the preset temperature After reacting in an oven at 130°C for 2.5 hours, the reaction kettle was taken out and cooled to room temperature. To obtain the mother liquor of silver nanowires, add 1000 volumes of alcohol to the mother liquor to dilute and then remove the upper clear night at a speed of 1500rpm to obtain...

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Abstract

The invention relates to a method for preparing a length-diameter-ratio nano-silver wire by a pH-value regulation solvothermal method. The method comprises the following steps of: preparing the following ethylene glycol solution, namely an ethylene glycol solution A of silver nitrate or silver acetate, an ethylene glycol solution B of polyvinyl pyrrolidone (PVP), an ethylene glycol solution C of water-soluble chloride and concentrated acid D; mixing the components according to a certain amount and fully stirring to form a final mixed solution; moving the final mixed solution into a reaction kettle; placing in an oven for reaction for a certain time; taking the reaction kettle out and cooling to room temperature to obtain mother liquid of the nano-silver wire; adding alcohol into the mother liquid for diluting, and removing supernatant liquor to obtain a precipitate; and repeatedly performing centrifugal separation, and thus obtaining nano-silver wire dispersion liquid uniformly dispersed in the alcohol. The method is simple, high in efficiency and low in cost, and can prepare high-quality nano-silver wires within a wider range of reaction condition; and prepared products are high in length-diameter ratio, good in length uniformity and low in impurity content.

Description

technical field [0001] The invention relates to the field of preparation of nano-silver wire materials, in particular to a method for preparing nano-silver wires with high aspect ratio: a solvothermal method for pH value adjustment. Background technique [0002] As an important branch of nanomaterial research, metal nanomaterials are represented by precious metals such as gold, silver, and copper, among which nanosilver has received the most attention because of its broad application prospects. Because nano silver has very stable physical and chemical properties, it has excellent performance in electronics, optics, antibacterial and catalysis, and can be widely used in catalyst materials, battery electrode materials, optical materials, antibacterial materials, coatings, etc. For example, nano-silver has high electrical conductivity and thermal conductivity, so that it can be used as a conductive filler for conductive adhesives. On the basis of obtaining better electrical con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 姜清奎常振宇丁渐宝
Owner JIANGSU NANOWELL ADVANCED MATERIALS SCI&TECH
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