A kind of preparation method of dendritic nano-silver conductive ink and fully printed stress sensor

A technology of stress sensor and conductive ink, which is applied in the direction of sensor, ink, printing, etc., can solve the problems of unfavorable stretchability, high sintering temperature, limiting sensor sensitivity, etc., and achieve long-term stability, high sensitivity, and fast response speed Effect

Active Publication Date: 2020-06-09
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, various micro-nano materials commonly used to form conductive networks at present either have high initial resistance (such as graphene, carbon nanotubes, etc.), or require high sintering temperatures (>120°C, such as silver nanowires, silver Nanoparticles, etc.), or the nature of the material itself limits the sensitivity of the sensor (ionic liquids, etc.), which is not conducive to obtaining a stress sensor with high stretchability and high sensitivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The invention relates to the preparation of dendritic nano-silver conductive ink and the preparation method of direct screen printing fully printed stress sensor. The details are as follows; 1) Synthesis of dendritic nano-silver: cut the copper foil into a size of 7cm×5cm, treat with dilute hydrochloric acid to remove surface dirt and oxides, and then wash with deionized water for later use. Dissolve 0.34g of silver nitrate in 40ml of deionized water, stir for 3min, then add 1.7g of polyvinylpyrrolidone (K-30), and stir for 10min to obtain solution A. Insert the cleaned copper foil into solution A and let it stand for 10 minutes to obtain dendritic nano silver. Then wash with absolute ethanol and deionized water three times in turn to obtain pure dendritic nano-silver. 2) Preparation of dendritic nano-silver conductive ink: The dendritic nano-silver dispersed in absolute ethanol was vacuum-dried at 60° C. for later use. 1.25 g of SIS was dissolved in 10 ml of xylene t...

Embodiment 2

[0024] The invention relates to the preparation of dendritic nano-silver conductive ink and the preparation method of direct screen printing fully printed stress sensor. The details are as follows; 1) Synthesis of dendritic nano-silver: cut the copper foil into a size of 7cm×5cm, treat with dilute hydrochloric acid to remove surface dirt and oxides, and then wash with deionized water for later use. Dissolve 0.34g of silver nitrate in 40ml of deionized water, stir for 3min, then add 1.7g of polyvinylpyrrolidone (K-30), and stir for 10min to obtain solution A. Insert the cleaned copper foil into solution A and let it stand for 10 minutes to obtain dendritic nano silver. Then wash with absolute ethanol and deionized water three times in turn to obtain pure dendritic nano-silver. 2) Preparation of dendritic nano-silver conductive ink: The dendritic nano-silver dispersed in absolute ethanol was vacuum-dried at 60° C. for later use. 1.25 g of SIS was dissolved in 10 ml of xylene t...

Embodiment 3

[0027]The invention relates to the preparation of dendritic nano-silver conductive ink and the preparation method of direct screen printing fully printed stress sensor. The details are as follows; 1) Synthesis of dendritic nano-silver: cut the copper foil into a size of 7cm×5cm, treat with dilute hydrochloric acid to remove surface dirt and oxides, and then wash with deionized water for later use. Dissolve 0.34g of silver nitrate in 40ml of deionized water, stir for 3min, then add 1.7g of polyvinylpyrrolidone (K-30), and stir for 10min to obtain solution A. Insert the cleaned copper foil into solution A and let it stand for 10 minutes to obtain dendritic nano silver. Then wash with absolute ethanol and deionized water three times in turn to obtain pure dendritic nano-silver. 2) Preparation of dendritic nano-silver conductive ink: The dendritic nano-silver dispersed in absolute ethanol was vacuum-dried at 60° C. for later use. 1.25 g of SIS was dissolved in 10 ml of xylene to...

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PUM

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Abstract

The invention relates to preparation of dendritic nano-silver conductive ink and a preparation method of a direct screen printing full-printing stress sensor. The dendritic nano-silver conductive inkwith good printing applicability is obtained through introducing Disponer 904S into a dendritic nano-silver / SIS ink system as a dispersant. A screen printing manner is used for printing the prepared dendritic nano-silver conductive ink on a nitrile butadiene rubber substrate and the high-stretchability and high-sensitivity stress sensor can be obtained; stress sensors with different sensing properties can be obtained through printing different geometric patterns. The conductive ink can be directly printed on disposable nitrile butadiene rubber gloves to obtain intelligent gloves capable of detecting gesture motions. The method is low in cost and simple to operate; rapid and large-batch production can be realized; the method can be used for industrial large-batch preparation and productionand can be applied to wearable electronic equipment for detecting human joint motion, and a man-machine interaction intelligent system.

Description

technical field [0001] The invention relates to the preparation of a dendritic nano-silver conductive ink and the preparation method of a direct screen printing fully printed stress sensor. Background technique [0002] Flexible stress sensors can be widely used in human joint motion monitoring, electronic skin, wearable electronic devices and human-computer interaction intelligent systems. Among all stress sensors, resistive stress sensors have attracted extensive attention from researchers due to their simple device structure, high sensitivity, and simple reading mechanism. Resistive strain sensors are usually fabricated by depositing a conductive network of conductive materials on the surface of or embedded in an elastomeric substrate. Currently, various methods are used to fabricate resistive stress sensors, such as spin coating, drop coating, mold filling, injection, vacuum filtration and so on. However, the relatively complicated preparation process and the inability...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/52C09D11/108B41M1/12B41M1/26A61B5/11A61B5/00
Inventor 吴伟田彬
Owner WUHAN UNIV
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