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A flexible self-driven gas sensor based on alveolar bionic structure and its preparation method

A gas sensor and bionics technology, applied in scientific instruments, instruments, measuring devices, etc., can solve the problems of low output power density, strict material requirements, and restrictions on wide application, and achieve stable output performance, low processing cost, and measurement small error effect

Inactive Publication Date: 2020-11-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electromagnetic induction generators and piezoelectric generators generally have defects such as complex structures, strict requirements on materials, and high cost; electrostatic pulse generators are deficient in miniaturization, light weight, and integration, and their output power density is low , cannot meet the needs of collecting biomechanical energy such as human body movement; existing electrostatic induction generators have defects such as large volume and narrow applicability
The above defects limit the wide application of generators based on the conversion of mechanical energy into electrical energy in practice.

Method used

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  • A flexible self-driven gas sensor based on alveolar bionic structure and its preparation method
  • A flexible self-driven gas sensor based on alveolar bionic structure and its preparation method
  • A flexible self-driven gas sensor based on alveolar bionic structure and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0043] A flexible gas self-actuated sensor based on alveolar bionics structure such as figure 1 As shown, it is characterized in that: it includes an insulating base stacked from bottom to top, a first friction member and a second friction member;

[0044] The first friction component includes: a first triboelectric layer, an electrode layer and a gas-sensitive thin film layer, the first triboelectric layer has a first surface and a second surface oppositely arranged, and the first surface is deposited with gas Sensitive material, electrode material is deposited on the second surface;

[0045] The second friction component includes: a second triboelectric layer, the second triboelectric layer is in contact with the surface where the gas-sensitive thin film layer is located on the first triboelectric layer, and the edges of the two are fixed, and the second triboelectric layer The layer is an elastic film material that deforms with changes in air pressure;

[0046] The first ...

Embodiment 2

[0054] The manufacturing process of a flexible self-driven nitrogen dioxide sensor based on the alveolar bionic structure is as follows: figure 2 As shown, it specifically includes the following steps:

[0055] (1), select the plexiglass substrate 1 of 1mm, the nylon film 3 of the latex film 4,75 μm of 50 μm for use, and adopt chemical reagents such as acetone, ethanol to clean and dry it;

[0056] (2), the organic glass 1 that will clean, latex film 4, nylon film 3 are cut into the square structure of 4cm * 4cm by laser cutting machine;

[0057] (3), at 4cm * 4cm nylon film 3 one-sided vapor deposition layer of copper is used as electrode layer, the present invention does not limit to the deposition mode of electrode layer, present embodiment adopts and uses thermal evaporation method; By laser cutting machine in The center of the square nylon film plated with the copper electrode layer 2 and the center of the plexiglass substrate 1 are cut to form a circular air hole with ...

Embodiment 3

[0066]This embodiment is intended to produce a flexible self-driven ammonia sensor based on the alveolar bionic structure. Compared with the embodiment 2, except that the material of the gas-sensitive film layer 7 is replaced by a polyaniline film, the rest of the steps are the same as the embodiment 2.

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Abstract

A flexible gas self-driving sensor based on alveolar biomimetic structure belongs to the technical field of gas sensors. The invention comprises an insulating base layered in sequence from top to bottom, a first triboelectric layer with an electrode layer and a gas-sensitive thin film layer and a second triboelectric layer using elastic materials are deposited on both sides respectively, the first and second triboelectric layers are The layers are fixed at the surrounding edges, and a gas channel is formed in the center of the insulating substrate, the electrode layer, the first triboelectric layer and the gas-sensitive film layer. Under the action of the air flow, the unfixed parts of the first and second triboelectric layers form a contact-separation cycle In order to generate induced charge, the electrical signal with the characteristics of gas concentration is output to the outside. Compared with the traditional gas sensor, the invention can automatically detect the gas concentration without an external power supply system, and the output performance of the sensor is stable, the structure is light and portable, easy to install and place, simple to manufacture, and low in processing cost, which is conducive to realizing self-powered breathing. Mass production of sensors.

Description

technical field [0001] The invention belongs to the technical field of gas sensors, in particular to a flexible self-driven gas sensor based on alveolar bionics structure and a preparation method thereof. Background technique [0002] Gas sensors are widely used in military, meteorological, agricultural, industrial (especially textile, electronics, food), medical, construction, and household appliances. There are many kinds of poisonous and harmful gases in the airtight environment system of manned spaceflight, fighter plane, submarine, ship, etc., which seriously threaten the life safety of personnel. The discharge of industrial waste gas and automobile exhaust is one of the main factors causing environmental pollution. Home manufacturing and decoration The exhaust gas released during the process has adverse effects on the human immune system and reproductive system and even has carcinogenic effects. Therefore, the study of sensor technology for toxic and harmful gases has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/60
CPCG01N27/60
Inventor 苏元捷杨铂汐谢光忠李双定潘虹张秋平太惠玲杜晓松蒋亚东
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA