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Flexible mechanical sensor of bionic microstructure and preparation method thereof

A flexible mechanics and sensor technology, applied in the direction of instruments, measuring forces, measuring devices, etc., can solve the problems of complex preparation process, difficulty in mass production, high cost, etc., and achieve improved sensitivity and measurement range, excellent reversible deformation characteristics and stability The effect of improved performance, sensitivity and measurement range

Pending Publication Date: 2021-09-03
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a flexible mechanical sensor with anti-biological microstructure surface characteristics for the above-mentioned problems existing in the existing high-performance microstructure flexible mechanical sensor, so as to solve the problem of complex preparation process and low cost of the existing microstructure flexible mechanical sensor. Problems such as high cost and difficulty in mass production

Method used

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  • Flexible mechanical sensor of bionic microstructure and preparation method thereof
  • Flexible mechanical sensor of bionic microstructure and preparation method thereof
  • Flexible mechanical sensor of bionic microstructure and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0058] In this embodiment, the flexible mechanical sensor disclosed herein is prepared by using the following steps.

[0059] Step 1, 30 g of thermal expansion microspheres were added to 70 g of platinum catalyzed silicone rubber EcoFlex (A component + B component) high molecular elastomeric solution, which was mixed with a planet mixer (AR-100, Thinky, Japan), removing bubbles, The thermal expanded microsphere / silicone rubber elastomer mixture is obtained;

[0060] Step 2, the thickness is controlled by the thickness, the thermal expansion microsphere / silicone rubber elastomer is poured onto the PET substrate, and the scraper height is adjusted to obtain a film embryo body having a thickness of 500 μm;

[0061] Step three, the obtained thin film embryo body is placed in a vacuum drying tank, set the temperature of 40 ° C, solidified to obtain thermal expansion microspheres / silicone rubber film material, surface scanning electron microscope figure 2 As shown, the surface is ...

Embodiment 2

[0067] Step 1, 35 g of thermal expansion microspheres were added to 65 g of polydimethyl silicone rubber PDMS (from 10: 1: 1: 1) solution, and mixed with high-speed planet mixers (AR-100, Thinky, Japan). Bubbles to obtain thermal expansion microspheres / PDMS mixture;

[0068] Step 2, pour the thermal expansion microspheres / PDMS mixed liquid onto the PET substrate, adjusting the scraper height of 100 μm, and prepared a thin film embryo body having a thickness of about 1 mm;

[0069] Step three, the resulting film embryo body is placed in a vacuum drying tank, and the temperature is 50 ° C, solidified formation to obtain thermal expansion microspheres / PDMS composite film material;

[0070] Step 4, the obtained film material is again placed in a vacuum drying tank at a high temperature of 110 ° C for 2 min, so that the internal microspheres are expanded from the surface of the substrate to protrude, thereby obtaining surface projection microstructure film materials, such as Imag...

Embodiment 3

[0075] Step 1, 40 g of thermal expansion microspheres are added to 60 g of silicone rubber EcoFlex (A component + B component) solution, which is uniform with high-speed planetary mixer (AR-100, Thinky, Japan), remove bubbles to obtain thermal expansion microspheres / silicon Rubber mixture;

[0076] Step 2, pour the thermal expansion microsphere / silicone rubber mixed liquid onto the PET substrate, adjusting the height of the doctor blade to 1 mm, and prepared a thin film embryo body having a thickness of about 1 mm;

[0077] Step three, the resulting film is placed in a vacuum drying tank, and the temperature is 50 ° C, cured molding to obtain a thermal expansion microsphere / silicone rubber film material;

[0078] Step 4, the obtained film material is again placed in a vacuum drying tank at a high temperature of 130 ° C for 5 min, so that the internal microspheres are expanded from the surface of the substrate to protrude, thereby obtaining a surface-projected bionic microstr...

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Abstract

The invention belongs to the technical field of intelligent flexible sensors, and particularly relates to a flexible mechanical sensor of a bionic microstructure and a preparation method of the flexible mechanical sensor. The flexible mechanical sensor comprises conductive sensing layers which are arranged in pairs and have surface microstructure characteristics, and the surfaces, with the surface microstructure characteristics, of the conductive sensing layers are oppositely arranged, wherein the conductive sensing layer comprises a base body layer; the base body layer is a microstructure film material base body layer which is prepared by heating and foaming a polymer elastomer film doped with thermal expansion microspheres, and the surface of the microstructure film material substrate layer is provided with a micro-bulge structure generated due to thermal expansion of the internal thermal expansion microspheres; and a conductive coating formed on the surface, with the micro-bulge structures, of the base body layer is further included. The problems that an existing microstructure flexible mechanical sensor is complex in preparation process, high in cost, difficult to prepare on a large scale and the like are solved.

Description

Technical field [0001] The present invention belongs to the technical field of intelligent flexible sensors, and more particularly to a flexible mechanical sensor of a bionic microstructure and a preparation method thereof. Background technique [0002] The flexible mechanical sensor can convert the mechanical stimulation signal such as an external pressure or strain into a handable electrical signal, compared to the conventional rigid sensor, the flexible mechanical sensor has a high sensitivity and wider measurement range, and has excellent mechanical flexibility. Sexual and attachment, in the fields of Internet, artificial intelligence, intelligent robots, human machine interactions, human health monitoring, structural health monitoring, etc. have broad application prospects. As the application demand in the information age is getting higher and higher, the related engineering applications provide higher requirements for the sensitivity of flexible sensors, measurement ranges,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/20
CPCG01L1/20
Inventor 唐振华黄培李元庆付绍云
Owner CHONGQING UNIV
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