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Magnetic and force cilium bionic sensor and preparation method thereof

A sensor and cilia technology, applied in the field of flexible sensors, can solve problems such as detecting a single contact force signal, and achieve the effects of good repeatability, low cost and high sensitivity

Inactive Publication Date: 2017-08-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But currently these ciliary bionic sensors can only detect a single contact force signal

Method used

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  • Magnetic and force cilium bionic sensor and preparation method thereof
  • Magnetic and force cilium bionic sensor and preparation method thereof
  • Magnetic and force cilium bionic sensor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1. Add 1.5g of polydimethylsiloxane and 0.2g of cobalt particles with a diameter of 500nm into 15ml of ethyl acetate and stir evenly. After ultrasonication for 0.5min, quickly put the above mixed solution in a 300mT uniform vertical magnetic field environment. Heating at 60°C for 16 hours until the solvent is completely volatilized and the resin is cured to obtain a magnetic cilia array, such as Figure 4 shown.

[0040] Step 2: Soak the above-mentioned magnetic cilia array in a graphene oxide aqueous solution with a concentration of 0.2g / L for 5 minutes, take it out, put it in a uniform vertical magnetic field environment, and heat it at 60°C for 4 hours until it is completely dried.

[0041] Step 3. Put the above-mentioned magnetic cilia array coated with graphene oxide into HI solution, soak at 20°C for 3min, wash with deionized water, and then heat at 60°C for 2h to completely dry to obtain the surface covered with reduced graphite oxide The magnetic cilia arr...

Embodiment 2

[0046] Step 1. Add 2g of polydiethylsiloxane and 0.02g of iron particles with a diameter of 500nm into 20ml of xylene and stir evenly. After ultrasonication for 10 minutes, quickly put the above mixed solution in a uniform vertical magnetic field environment of 500mT. Heating under the conditions for 12 hours until the solvent is completely volatilized and the resin is cured to obtain a magnetic cilia array with a cilia length of 1000 μm.

[0047] Step 2: Soak the above-mentioned magnetic cilia array in a graphene oxide aqueous solution with a concentration of 0.5 g / L for 1 min, take it out, put it in a uniform vertical magnetic field environment, and heat it at 80° C. for 2 h until it is completely dried.

[0048] Step 3. Put the above-mentioned magnetic cilia array coated with graphene oxide into KOH solution, soak at 90°C for 60min, wash with deionized water, and heat at 100°C for 0.5h to completely dry to obtain the surface covered with redox Graphene's array of magnetic c...

Embodiment 3

[0053] Step 1. Add 0.5g of polymethylvinylsiloxane and 0.25g of nickel particles with a diameter of 1000nm into 50ml of toluene and stir evenly. After ultrasonication for 10min, quickly put the above mixed solution in a uniform vertical magnetic field environment of 1000mT. It was heated at ℃ for 20 h until the solvent was completely volatilized and the resin was solidified to obtain a magnetic cilia array with a cilia length of 10000 μm.

[0054] Step 2: Soak the above-mentioned magnetic cilia array in a graphene oxide aqueous solution with a concentration of 0.05g / L for 10 minutes, take it out, put it in a uniform vertical magnetic field environment, and heat it at 80°C for 2 hours until it is completely dried.

[0055] Step 3, repeat step 2 5 times.

[0056] Step 4. Put the above-mentioned magnetic cilia array coated with graphene oxide into hydrazine hydrate solution, soak at 60°C for 600min, wash with deionized water, and then heat at 70°C for 1h to completely dry to obta...

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Abstract

The invention provides a magnetic and force cilium bionic sensor and a preparation method thereof. The sensor is formed by a signal sensitive layer and an electrode layer. The signal sensitive layer is a magnetic conductive cilium array. The preparation method comprises the following steps: 1) placing suspension liquid formed by resin materials and magnetic particles in a magnetic field environment, carrying out heating treatment until solvent is evaporated and resin is cured and obtaining a magnetic cilium array; and 2) coating graphene oxide onto the surface of the obtained magnetic cilium array, and carrying out chemical reduction treatment to obtain the magnetic conductive cilium array. The electrode layer is a flexible macromolecule film layer having an interdigital conductive network structure. The sensor has the advantages of low cost, high sensitivity, good repeatability and having response to magnetic and force signals and the like, and has a good application prospect in the fields of biological health detection, smart screen, human-computer interaction and electronic skin and the like.

Description

technical field [0001] The invention relates to the technical field of flexible sensors, in particular to a magnetic and force cilia bionic sensor and a preparation method thereof. [0002] technical background [0003] With the development of science and technology and the improvement of people's living standards, wearable devices for medical health have attracted more and more attention. Stress or strain sensors have a wide range of applications in health monitoring, smart screens, human-computer interaction, and electronic skin. However, traditional stress or strain sensors based on metal foils and semiconductor materials have problems such as poor flexibility and low strain range, which limit their application in wearable devices. In recent years, a variety of flexible stress / strain sensors suitable for wearable devices have been developed, such as biocellulose-based strain sensors, silver nanowire sensors, and graphene flexible sensors. At present, most flexible sensor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 李元庆刘亚风付亚飞黄培付绍云
Owner CHONGQING UNIV
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