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Unilateral electrode ionic polymer pressure sensing array and preparation method thereof

An ionic polymer and side electrode technology, applied in the field of single-side electrode ionic polymer pressure sensing array and its preparation, can solve the problems of unstable contact, little research, noise interference, etc., so as to improve the reliability of the device and simplify the device structure, the effect of reducing the difficulty of assembly

Active Publication Date: 2021-07-27
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, flexible active sensors are facing problems such as poor sensing performance due to irrational sensing structure and complex manufacturing process of small arrays.
The sensors designed and developed based on flexible sensing materials are mainly used to sense bending, and there are few studies on the sensing of pressure forms. The poor sensing performance is mainly manifested in low response amplitude. The voltage response amplitude of flexible sensing devices with traditional cantilever beam structures is still 1-10mV magnitude range
[0004] Existing research mainly focuses on capacitive and piezoresistive flexible sensing devices, but there is little research on flexible active pressure sensing devices made of ion-exchange resin materials. Compared with single ion-exchange resin material sensors, ion-exchange resin material arrays The formed artificial skin has the functions of vector measurement and distribution measurement, and is more widely used, but there are few studies in this area; most of the existing flexible active sensors adopt the sandwich structure in the electrode layout scheme, that is, the upper and lower The sensing material is sandwiched between the two electrode sheets. On the one hand, the sensitivity of the sensing device is not high, and the assembly is difficult. On the other hand, the instability caused by physical contact is difficult to solve. The unstable contact also brings a lot of noise interference. , which seriously restricts the performance of flexible sensing devices

Method used

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  • Unilateral electrode ionic polymer pressure sensing array and preparation method thereof
  • Unilateral electrode ionic polymer pressure sensing array and preparation method thereof
  • Unilateral electrode ionic polymer pressure sensing array and preparation method thereof

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preparation example Construction

[0059] The preparation method of ionomer film is as follows:

[0060] Use copper sheet or frosted glass as the mold for casting film, use DuPont's 5% to 20% concentration of Nafion solution, and dimethylacetamide according to the ratio of (1 to 4): 1, and obtain 25% to 33% by concentration. % of the concentrated solution is used for casting film;

[0061] Coat the casting solution on the surface of the mold, place it in a vacuum drying oven, and dry it at a high temperature of 60-80°C to make the solution solidify and form a film;

[0062] The copper sheet and the membrane were placed in deionized water, and the membrane was removed under the assistance of ultrasound to obtain an ionic polymer film with a pyramid microarray structure.

Embodiment 1

[0065] A laser-brushed copper sheet is used as a mold for casting a film. DuPont's 5% Nafion solution is used to prepare a 4:1 ratio of dimethylacetamide, and a 25% concentrated solution is obtained through concentration for casting a film. The casting solution is coated on the surface of the mold, placed in a vacuum drying oven, and dried at a high temperature of 80°C to make the solution solidify and form a film. Place the copper sheet and membrane in deionized water, and remove the membrane under the assistance of ultrasound to obtain an ionic polymer film with a pyramidal microarray structure, such as figure 2 shown.

[0066] see image 3 , the flexible fpc circuit board is used as the electrode layer, and the fpc connector is connected to the conditioning circuit through the end of the electrode layer. When assembling, refer to figure 1 First, the double-sided adhesive layer 4 is bonded to the surface of the object to be measured, then the electrode layer 3 is bonded,...

Embodiment 2

[0070] Use the laser-brushed copper sheet as the casting mold, use DuPont's 10% Nafion solution, and dimethylacetamide according to the ratio of 2:1, and obtain a 28% concentrated solution for casting the film through concentration; The casting solution is coated on the surface of the mold, placed in a vacuum drying oven, and dried at a high temperature of 65°C to make the solution solidify and form a film. Place the copper sheet and membrane in deionized water, and remove the membrane under the assistance of ultrasound to obtain an ionic polymer film with a pyramidal microarray structure, such as figure 2 shown.

[0071] see image 3 , the flexible fpc circuit board is used as the electrode layer, and the fpc connector is connected to the conditioning circuit through the end of the electrode layer. When assembling, refer to figure 1 First, the double-sided adhesive layer 4 is bonded to the surface of the object to be measured, then the electrode layer 3 is bonded, the ion...

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Abstract

The invention discloses a single-side electrode ionic polymer pressure sensing array and a preparation method thereof. The single-side electrode ionic polymer pressure sensing array sequentially comprises a sealing layer, an ion exchange resin film, an electrode layer and a double-sided adhesive layer from top to bottom, a microstructure with unequal upper and lower surface areas is arranged at one side, facing the electrode layer, of the ion exchange resin film, the electrode layer is arranged on one side of the bottom surface, and positive and negative electrodes are arranged on the same side of the ion exchange resin film; and the double-sided adhesive layer is arranged on the surface of an object to be tested and is externally connected with a test circuit for testing through the electrode layer. The sensing array has the advantages of being flexible in structure, high in sensitivity, low in noise, low in cost and capable of sensing the magnitude and the position of pressure, and has great reference significance in the directions of robot touch sense, flexible touch control and the like.

Description

technical field [0001] The invention belongs to the technical field of pressure sensing, and in particular relates to a single-side electrode ion polymer pressure sensing array and a preparation method thereof. Background technique [0002] In recent years, flexible polymers and functional composite materials based on them have received extensive attention. Artificial skin sensors made of flexible polymers have broad development prospects in the fields of flexible robots, flexible medical devices, and flexible touch. Flexible sensing materials include active sensing materials such as ion exchange resin or PVDF piezoelectric polymer (pvinylidenefluoride) and passive sensing materials such as nanoparticle composite silicone rubber or force-sensitive rubber. Ion exchange resin is a new type of flexible polymer active sensing material. Compared with passive sensing, it can convert mechanical quantities into electrical signals. The peripheral circuit is simple and does not requir...

Claims

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Application Information

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IPC IPC(8): G01L1/16
CPCG01L1/16
Inventor 朱子才武文家解阳瑞刘艳卢同庆
Owner XI AN JIAOTONG UNIV
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