Application of polyvinyl alcohol ionic gel as flexible electronic electromagnetic shielding layer

A technology of electromagnetic shielding layer and ion gel, applied in the direction of magnetic/electric field shielding, electrical components, etc., can solve the problems of lack of design and preparation methods of polyvinyl alcohol ion gel, and achieve easy-to-master process, high ductility, and easy operation The effect of simple process

Active Publication Date: 2021-04-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prior art still lacks the design and preparation methods of polyvinyl alcohol ion gels for flexible electronic electromagnetic shielding applications

Method used

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  • Application of polyvinyl alcohol ionic gel as flexible electronic electromagnetic shielding layer
  • Application of polyvinyl alcohol ionic gel as flexible electronic electromagnetic shielding layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of ionic gel: First, weigh 4g of polyvinyl alcohol particles and add them to 36g of deionized water, stir moderately, and after ultrasonic treatment for 30min to disperse evenly, add 5.4g of phosphoric acid (≧85wt% in H 2 0), and finally carry out ultrasonic treatment for 30min and fully mix to form a liquid ion gel, and the ultrasonic frequency is 20KHz.

[0027] (2) Implementation method of electromagnetic shielding: after immersing the flexible capacitive curvature sensor in the liquid ion gel, take it out, and then put it in a drying oven for drying treatment for 8 hours, so that the liquid ion gel solidifies to form a thin film.

[0028] (3) Finally, the ion gel film is used as a shielding layer and grounded with wires to realize electromagnetic shielding of the flexible sensor.

Embodiment 2

[0030] (1) Preparation of ion gel: First, weigh 2g of polyvinyl alcohol particles and add them to 18g of deionized water, stir moderately, and after ultrasonic treatment for 30 minutes to disperse evenly, add 0.22g of sodium chloride particles, and finally perform ultrasonic treatment for 30 minutes After being fully mixed, a liquid ion gel is formed, and the ultrasonic frequency is 40KHz.

[0031] (2) Implementation method of electromagnetic shielding: after immersing the flexible capacitive curvature sensor in the liquid ion gel, take it out, and then put it in a drying oven for drying treatment for 8 hours, so that the liquid ion gel solidifies to form a thin film.

[0032] (3) Finally, the ion gel film is used as a shielding layer and grounded with wires to realize electromagnetic shielding of the flexible sensor.

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Abstract

The invention belongs to the technical field of flexible electronics, and particularly relates to application of polyvinyl alcohol ionic gel as a flexible electronic electromagnetic shielding layer. The flexible electronic electromagnetic shielding layer is prepared by the following method: (1) dissolving polyvinyl alcohol particles in water, performing ultrasonic treatment, uniformly dispersing, adding an electrolyte, and performing ultrasonic treatment again to form liquid ionic gel; (2) coating the surface of a flexible electronic device with the liquid ionic gel, and drying to form a flexible ionic gel film; and (3) grounding the flexible ionic gel film to obtain the flexible electronic electromagnetic shielding layer. The prepared liquid ionic gel has liquidity of liquid, the cured ionic gel film has high ductility and can be completely matched with the complex shape of the flexible electronic device and deformation generated by the flexible electronic device, the ionic gel film is colorless and transparent, the observation of the flexible electronic device is not affected, the process is easy to master, and the operation process is simple.

Description

technical field [0001] The invention belongs to the technical field of flexible electronics, and more specifically relates to the use of a polyvinyl alcohol ion gel as a flexible electronic electromagnetic shielding layer. Background technique [0002] Flexible electronics have good flexibility and high compatibility, and have broad application prospects in medical, information, energy, national defense and other fields, such as flexible sensing, flexible display, flexible energy storage, electronic skin, electronic tags, wearable devices, etc. With the development of electronic devices in the direction of flexibility and precision, traditional electromagnetic shielding materials such as metals and their alloys cannot meet the needs of flexible electronic devices for electromagnetic shielding due to lack of flexibility and difficulty in processing. Therefore, it is particularly important to develop a flexible electromagnetic shielding method with easy-to-master process and f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05K9/00
CPCH05K9/0081
Inventor 郭家杰张勇博黄斌郭楚璇
Owner HUAZHONG UNIV OF SCI & TECH
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