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A kind of silver wire and preparation method thereof

A silver wire, aqueous solution technology, applied in metal processing equipment, transportation and packaging, nanotechnology for materials and surface science, etc., can solve the problems of cumbersome processing steps, low preparation concentration, and high operational requirements, and achieve convenient synthesis. It has good effects on environmental protection, easy large-scale preparation and product regularity.

Active Publication Date: 2021-11-05
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many shortcomings in this method: 1) the repeatability is poor, and the requirements for raw materials and operations are high; 2) the preparation concentration is low, which is not suitable for large-scale large-scale preparation, and the proportion of silver wires is low at high concentrations. Accompanied by a large number of nanoparticles "Chen Hui et al., A nano-silver wire and its preparation method, CN2017 10100872.9); 3) It requires high temperature (150-200°C) and a long time, and consumes a lot of energy; 4) It needs to use a large amount of ethanol and water Washing products, subsequent processing steps are cumbersome and time-consuming
The above defects have restricted the large-scale application of silver wires

Method used

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  • A kind of silver wire and preparation method thereof

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Effect test

Embodiment 1

[0017] 1. At room temperature, add the aqueous solution of imidazole and its derivatives to the aqueous silver nitrate solution at a volume ratio of 1:3, and mix well to obtain a solution. The aqueous solution of imidazole and its derivatives is 10%, and the mass fraction of silver nitrate aqueous solution is 10%; the imidazole and its derivatives include imidazole, 2-methylimidazole, 1,2-dimethylimidazole, 2-ethyl Water-soluble imidazole compounds such as imidazole, and their mixtures in any ratio.

[0018] 2. At room temperature, pour ascorbic acid aqueous solution into solution A at one time, filter after 1 min to obtain insoluble matter, wash with distilled water and ethanol, and vacuum dry at 40°C to obtain tadpole-shaped silver wires. The mass fraction of the ascorbic acid aqueous solution is 7%, and the volume ratio of the ascorbic acid aqueous solution to the imidazole and its derivative aqueous solution is 1:1.

Embodiment 2

[0020] 1. At room temperature, add 2-methylimidazole aqueous solution to silver nitrate aqueous solution at a volume ratio of 1:5, and mix well to obtain A solution. The aqueous solution of imidazole and its derivatives is 15%, and the mass fraction of silver nitrate aqueous solution is 15%.

[0021] 2. At room temperature, pour ascorbic acid aqueous solution into solution A at one time, filter after 1 min to obtain insoluble matter, wash with distilled water and ethanol, and vacuum dry at 40°C to obtain tadpole-shaped silver wires. The mass fraction of the ascorbic acid aqueous solution is 10%, and the volume ratio of the ascorbic acid aqueous solution to the imidazole and its derivative aqueous solution is 1:2.

Embodiment 3

[0023] 1. At room temperature, add imidazole aqueous solution to silver nitrate aqueous solution at a volume ratio of 1:0.2, and mix well to obtain A solution. The imidazole aqueous solution is 5%, and the silver nitrate aqueous solution mass fraction is 5%.

[0024] 2. At room temperature, pour ascorbic acid aqueous solution into solution A at one time, filter after 1 min to obtain insoluble matter, wash with distilled water and ethanol, and vacuum dry at 40°C to obtain tadpole-shaped silver wires. The mass fraction of the ascorbic acid aqueous solution is 3%, and the volume ratio of the ascorbic acid aqueous solution to the imidazole and its derivative aqueous solution is 1:0.5.

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Abstract

The invention provides a silver wire and a preparation method thereof, belonging to the technical field of metal materials. The silver wire is tadpole-shaped; the head is composed of micron particles with a diameter of 800-1000nm, and the tail is composed of nanowires with a diameter of 70-200nm; the length of the silver wire is 30-40 μm. The specific preparation process of the silver wire is as follows: add imidazole and its derivatives aqueous solution to silver nitrate aqueous solution at room temperature, then add ascorbic acid aqueous solution, filter the product, wash with distilled water and ethanol, and dry to obtain the product of the present invention. The preparation process of the tadpole-shaped silver wire of the present invention does not require high temperature, high pressure, or organic solvent, and the product regularity is good. Compared with existing techniques such as polyol reduction, the silver wire preparation process of the present invention is simpler, the synthesis is more convenient and environmentally friendly, and thus it is easier to produce on a large scale.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a silver wire and a preparation method thereof. Background technique [0002] Silver wire is considered to be the most likely material to replace the traditional ITO transparent electrode due to the excellent electrical conductivity of the silver material coupled with the nanoscale small size effect, light transmittance, and flex resistance. It can be widely used in the fields of flexible electronics such as flexible and bendable LED displays and touch screens "Chen Pingping, A method for preparing silver nanowires, CN201410510921.2". In addition, due to the large aspect ratio effect of silver wire, it also has outstanding advantages in the application of conductive paste and thermal conductive adhesive. [0003] Due to the above-mentioned outstanding advantages of silver wires, people have extensively explored their synthesis methods. In the prior art, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00B22F9/24B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/0547
Inventor 夏友谊沈磊刘宁高宏杨建国张贺新林鹏金玲
Owner ANHUI UNIVERSITY OF TECHNOLOGY