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A kind of preparation method of silver nanowire conductive paste

A technology of silver nanowires and conductive pastes, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve problems such as poor high temperature resistance

Active Publication Date: 2021-10-15
西安宏星电子浆料科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flexible substrates such as conventional PET and paper have poor high temperature resistance, and it is difficult to sinter them at temperatures above 150°C. Therefore, it is necessary to develop special pastes for flexible substrates.

Method used

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  • A kind of preparation method of silver nanowire conductive paste

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preparation example Construction

[0019] A preparation method of silver nanowire conductive paste:

[0020] Select silver nanowires with a length of 20-30 μm and a diameter of 30-60 nm to disperse in absolute ethanol, and configure a silver nanowire solution, A;

[0021] Weigh PVP, add water and absolute ethanol (the mass ratio of water to absolute ethanol is 3.5:1), heat and mix while stirring until the whole solution is clear and transparent, then perform ultrasonication for 3 minutes to remove air bubbles in the sample, and let it stand for 5 minutes , get B;

[0022] Weigh carboxymethylcellulose sodium and add it to water and stir until it becomes a colorless transparent paste to obtain C;

[0023] Weigh 1gB and 10gC, mix and stir evenly, then add sodium alginate (Mw=50000) and mix evenly to obtain D;

[0024] Ultrasonic disperse the AgNWs dispersion A for 3-7 minutes, add it to D at a mass ratio of 1:1, stir and mix evenly, and ultrasonically 5-7 minutes to obtain a slurry, the stirring speed is 150r / mi...

Embodiment 1-6

[0025] Embodiment 1-6, preparation method is as above-mentioned, and processing parameter is as following table in each embodiment:

[0026]

[0027] In the above table, select paper as the substrate (ordinary A4 paper), select 300-mesh screen, and cure it in an oven at 50°C for 10 minutes after printing to measure the resistance value with Hioki’s RM3545 resistance meter.

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Abstract

A method for preparing silver nanowire conductive paste belongs to the field of flexible conductive electronic paste preparation. Silver nanowire is dispersed in absolute ethanol to obtain silver nanowire solution A. PVP is selected as a dispersant, and water and anhydrous Ethanol is used as a solvent to obtain PVP solution B, sodium carboxymethyl cellulose is selected as a carrier, and carrier solution C is prepared with water as a solvent. After mixing B:C according to a mass ratio of 1:10, sodium alginate is selected as an additive. To obtain D, mix A and D uniformly according to the mass ratio of 1:1, and then ultrasonicate for 5-7 minutes to obtain a slurry. Since water is mainly used as a solvent in the slurry, its curing temperature is below 50°C, and it can be dried at room temperature, so The curing temperature is greatly reduced; secondly, the materials used in the slurry are all non-toxic compounds, and the main solvent in the slurry is water, which is an environment-friendly slurry.

Description

technical field [0001] The invention belongs to the field of preparation of flexible conductive electronic paste, and in particular relates to a preparation method of silver nanowire conductive paste. [0002] technical background [0003] As an emerging technology, flexible electronics has attracted more and more attention with the wide application of wearable smart electronic devices. Due to the particularity of flexible substrates, traditional silicon-based microelectronic device manufacturing techniques are not suitable for low-cost and large-scale preparation of flexible electronic devices. In contrast, printed electronics technology has the advantages of low energy consumption, low consumption, green environmental protection, strong flexibility, and low equipment investment. Simple manufacturing processes allow mass production of conventional electronics. In the field of printed electronics, because metal nanomaterials have the advantages of small size, low sintering ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B1/16H01B1/22
CPCH01B1/16H01B1/22H01B13/00
Inventor 刘振国焦凯黄维郝武昌王大林宫蕾卢睿涵贾光耀
Owner 西安宏星电子浆料科技股份有限公司