Asymmetric strong adhesive and easy to tear sensor and preparation method

A sensor, asymmetric technology, applied in the field of flexible sensors, can solve the problem of difficult to have strong adhesion and easy separation at the same time, and achieve the effect of improving the reuse rate, simple processing method, good peel resistance and easy peeling.

Active Publication Date: 2022-03-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is often used in the manufacture and transfer of sensors or materials with small thickness, such as wafers, printed circuit boards, etc. However, the existing patterning technology is difficult to have strong adhesion and easy separation performance at the same time

Method used

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  • Asymmetric strong adhesive and easy to tear sensor and preparation method
  • Asymmetric strong adhesive and easy to tear sensor and preparation method
  • Asymmetric strong adhesive and easy to tear sensor and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Using PIC hydrogel as a flexible substrate to prepare an asymmetric strong sticky and easy-to-tear sensor, the specific fabrication steps are as follows:

[0038] Step 1: To prepare PIC (conducting ion polymer) hydrogel film, first soak PIC powder in a centrifuge tube at 90°C with saline solution (2.5M) for 6 hours, then centrifuge at 5000~14000 rpm for 10 minutes, 3 times per hour , to remove the air bubbles in it to obtain a uniform PIC gel, and then keep the sample at 90 °C for 10 minutes to increase its fluidity, pour it into a polytetrafluoroethylene (PTFE) mold, and immediately compress it at room temperature for 20 Minutes to molding, take it out after molding, paste the acrylic adhesive layer on the bottom as the adhesive layer 6, and paste the release paper 7 on the bottom of the acrylic adhesive layer to protect the adhesive layer 6;

[0039] Step 2: The incision pattern can be designed by graphic design software such as AutoCAD or CorelDRAW, and the functiona...

Embodiment 2

[0044] Using PDMS (polydimethylsiloxane) as a flexible substrate to prepare an asymmetric strong adhesive and easy-to-tear sensor, the main difference from Example 1 lies in the preparation method of the substrate in step 1, which specifically includes the following steps:

[0045] Step 1: First, mix the PDMS (Kang Daoning 184) precursor solution and the solidification solution at a ratio of 10:1, and place it in a centrifuge at a speed of 500-2000 rpm for 5-10 minutes, and then inject PTFE (polytetrafluoroethylene) Ethylene) mold, vacuum defoaming for 5-10 minutes, put in an oven at 65°C and heat for 1-2 hours, after demolding, stick an acrylic adhesive layer on the bottom as the adhesive layer 6, and paste release paper 7 on the bottom of the acrylic adhesive layer Used to protect the adhesive layer 6;

[0046] Step 2: Form a functional incision 2 for adhesion regulation by laser cutting or punching process, clean the surface with industrial alcohol, and perform plasma treat...

Embodiment 3

[0050] In order to improve the adaptability of the sensor to different viscosity requirements, the functional cutout (2) of the present invention is as follows Figure 5 shown, specific Figure 5 (a) is a hollowed-out asymmetric viscous sensor cutout pattern 21, Figure 5 (b) is a sensor cutout pattern 22 with a large deformation of a dotted line, Figure 5 (c) is a sensor cutout pattern 23 with both dotted line type and asymmetric stickiness; Figure 5 The hollow cut 21 in (a) not only has the characteristics of strong adhesion and easy tearing, but also can protect the surface protrusions of the sensed object, and can also monitor electronic devices and microstructures in real time; Figure 5 The dotted line incision 22 in (b) includes but is not limited to patterns such as isosceles triangle, rectangle, isosceles trapezoid, and semicircle. It is only necessary to ensure that the incision is oriented and not closed; the dotted line incision 22 can adapt to large deformatio...

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Abstract

The invention discloses an asymmetric strong-adhesive and easy-to-tear sensor and a preparation method thereof. The sensor is composed of a base material, a functional incision, a crack hole, a patterned electrode and a wire, an adhesive layer and a release paper; wherein, the The base material includes one of the above, and the electrode includes one of the above. The preparation method includes: firstly prepare a strong and flexible film, and paste an adhesive layer and a release paper on the bottom, and cut or punch the film by laser. Cutting process forms a slit for adhesion control, attaches a metal mask with electrode patterns drawn on the surface of the hydrogel film, drops the conductive solution into the gap of the mask, removes the mask after the solvent evaporates, and applies it to the electrode. Wires are drawn out from the pins to integrate flexible sensors with controllable adhesion. The invention has controllable viscous strength and direction, small and light volume, can respond to various stimuli such as stretching, load-bearing, vibration and temperature, has sensitive sensing, can be arrayed, is easy to manufacture, and is suitable for pasting and pasting on large deformation and complex surfaces. Sensing and other technical characteristics.

Description

technical field [0001] The invention relates to the technical field of flexible sensors, in particular to an asymmetric strong-adhesive and easy-to-tear sensor and a preparation method. Background technique [0002] Controllable adhesion is very important in the fields of flexible electronic devices and biopharmaceuticals. It is not only an important condition to ensure the functionality of devices, but also closely related to the precise positioning, adsorption, separation, transfer and other processes of materials or devices. The adhesion of traditional sensors is generally pressure-driven. Although the response is sensitive and the performance is strong, the viscosity is single, either strong and difficult to tear off, or weak and easy to fall off. It is difficult to use the surface again, and the repetition rate is very low. In addition, in order to achieve strong adhesion, some sensors usually use a relatively viscous adhesive, which makes it difficult to separate the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/16C09J7/20C09J7/25C09J7/40
CPCG01D5/16C09J7/20C09J7/25C09J7/40C09J2301/122C09J2203/326G01H11/06G01L1/2287G01K7/16G01L1/22
Inventor 谢宇王莉倩刘丰睿龚博钱劲
Owner ZHEJIANG UNIV
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