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Design method of multifunctional touch sensor based on 4D printing

A tactile sensor and design method technology, applied in the fields of additive manufacturing and electronic science, can solve problems such as limiting the development and application of intelligent equipment, and achieve the effects of avoiding material preparation, simple manufacturing, and low cost

Active Publication Date: 2021-10-26
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Capacitive tactile sensors based on the principle of displacement generally use the following two methods to generate capacitance changes to achieve external force sensing: 1: Changes in the overlapping area between two plates; 2: Changes in the distance between two plates ; But the current tactile pressure sensors are all static and invariable, which greatly limits the development and application of intelligent equipment

Method used

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  • Design method of multifunctional touch sensor based on 4D printing
  • Design method of multifunctional touch sensor based on 4D printing
  • Design method of multifunctional touch sensor based on 4D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Stretch the polyurethane material by 40% along its length at 50°C, cool to 30°C for 1 minute, and unload the external force to obtain the stretched base layer; the multi-walled carbon with a weight ratio of 1:12 Nanotubes (CNT) and polydimethylsiloxane (PDMS) are mixed and dispersed in a mixed solution of ethanol and ethyl acetate with a mass ratio of 1:1 to form an electrode material; the electrode is composed of two sets of comb-toothed structures inserted in opposition , the height of the comb teeth is between 0.2mm and the spacing between the comb teeth is 0.1mm; the material of the pressing layer is Ecofle-0010 silicone rubber; the shape memory PU is fully dissolved with dichloromethane to realize extrusion printing; the multi-walled carbon nanotubes and The PDMS material was added to a mixed solvent of ethanol and ethyl acetate at a mass ratio of 1:12 and mixed and stirred by a planetary mixer for 30 minutes, and then the solvent was volatilized at 80°C for 8 hours...

Embodiment 2

[0094] Stretch the polyurethane material by 30% along its length at 50°C, cool to 30°C for 1 minute, and unload the external force to obtain the stretched base layer; the multi-walled carbon with a weight ratio of 1:12 Nanotubes (CNT) and polydimethylsiloxane (PDMS) are mixed and dispersed in a mixed solution of ethanol and ethyl acetate with a mass ratio of 1:1 to form an electrode material; the electrode is composed of two sets of comb-toothed structures inserted in opposition , the height of the comb teeth is between 1mm and the spacing between the comb teeth is 0.2mm; the material of the pressing layer is Ecofle-0010 silicone rubber; the shape memory PU is fully dissolved with dichloromethane to realize extrusion printing; the multi-walled carbon nanotubes and The PDMS material was added to a mixed solvent of ethanol and ethyl acetate at a mass ratio of 1:12 and mixed and stirred by a planetary mixer for 30 minutes, and then the solvent was volatilized at 80°C for 8 hours t...

Embodiment 3

[0097] Stretch the polyurethane material by 30% along its length at 50°C, cool to 30°C for 1 minute, and unload the external force to obtain the stretched base layer; the multi-walled carbon with a weight ratio of 1:12 Nanotubes (CNT) and polydimethylsiloxane (PDMS) are mixed and dispersed in a mixed solution of ethanol and ethyl acetate with a mass ratio of 1:1 to form an electrode material; the electrode is composed of two sets of comb-toothed structures inserted in opposition , the height of the comb teeth is between 1.5mm and the spacing between the comb teeth is 0.3mm; the material of the pressing layer is Ecofle-0010 silicone rubber; the shape memory PU is fully dissolved with dichloromethane to realize extrusion printing; the multi-walled carbon nanotubes and The PDMS material was added to a mixed solvent of ethanol and ethyl acetate at a mass ratio of 1:12 and mixed and stirred by a planetary mixer for 30 minutes, and then the solvent was volatilized at 80°C for 8 hours...

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Abstract

The invention discloses a design method of a multifunctional touch sensor based on 4D printing. A capacitive sensor with a complex structure is manufactured by adopting a multi-material 3D printing method; and a shape memory polymer is designed and used to be added into the capacitive sensor. According to the invention, the defect that an open type capacitive sensor cannot sense the pressure of a rigid contact object is overcome, the touch sensing and electrochemical sensing functions which cannot be realized by a flat plate capacitive sensor are realized, and the real multifunctionality of the touch sensor is realized; and the open type capacitive sensor structure 3D printing sensor adopting coplanar design can be used for strain and pressure sensing and can also be used for high-sensitivity tactile sense and electrochemical sensing application, a 4D printing shape memory polymer is used as a substrate of the capacitor, in the 4D change process of thermal response shape memory, the capacitor can generate adjustable capacitance test sensitivity and measuring range change, and the intelligent sensor with the adjustable sensitivity and measuring range of 4D printing is realized.

Description

technical field [0001] The invention relates to the field of electronic science and technology, and to the field of additive manufacturing (3D printing), in particular to a design method for a 4D printed multifunctional tactile sensor. Background technique [0002] Since the 1990s, tactile pressure sensors have gradually developed in the direction of three-dimensional force measurement, tactile imaging, and active perception due to their advantages of high sensitivity, high resolution, and high flexibility, and have been widely used in the field of intelligent robots. Especially with the advancement of tactile sensing technology, its application range has been expanded to various fields. In the fields of electronic sensitive skin, artificial prosthetics, medical detection and other fields, tactile sensors have a wide range of application space. According to different sensitive mechanisms, tactile sensors can be divided into: capacitive, piezoresistive, piezoelectric, ultraso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/14B29C69/02B33Y80/00
CPCG01L1/142B29C69/02B33Y80/00
Inventor 王振国任雷吴千周雪莉李桂伟何禹霖宋正义韩志武任露泉刘庆萍
Owner JILIN UNIV
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