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A self-powered humidity sensor based on composite spinning film and its preparation method

A technology of self-powered humidity and composite spinning, which is applied in the direction of generators, instruments, and scientific instruments that convert kinetic energy into electric energy, and can solve problems such as limiting sensor real-time monitoring, achieving fast response/recovery speed, simple device structure, and mass production. big effect

Active Publication Date: 2022-05-06
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, traditional electronic humidity sensors are inseparable from external power drives, which limits the real-time monitoring of sensors in the Internet of Things. Therefore, the development of humidity sensors based on sustainable power generation is very important for green, environmentally friendly, non-toxic and friendly environmental requirements. the meaning of

Method used

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  • A self-powered humidity sensor based on composite spinning film and its preparation method
  • A self-powered humidity sensor based on composite spinning film and its preparation method
  • A self-powered humidity sensor based on composite spinning film and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0039] In this embodiment, PET is used as the flexible substrate, gold is used as the lower electrode material, and nickel-chromium alloy conductive tape is used as the upper electrode material.

[0040] (1) Evaporate the lower electrode on a clean PET substrate by thermal evaporation process. Configure Nb 2 CT x / Sodium alginate composite spinning solution: Weigh 0.18g sodium alginate powder, 0.5g dimethyl sulfoxide, 0.1g triton, 0.02g polyethylene oxide powder, 9.2g deionized water, 20mg Nb 2 CT x Powder, stir well and set aside.

[0041] (2) Preparation of Nb 2 CT x / Sodium alginate composite spinning film: spinning height: 15cm, spinning flow rate: 10μL / min, spinning voltage: 15KV; spin on the lower electrode for 10min, then dry for later use.

[0042] (3) Soak the spinning membrane obtained in the previous step in 1 wt % calcium chloride ethanol solution for cross-linking for 5 min, dry it and set it aside.

[0043] (4) Use nickel-chromium alloy conductive tape to...

Embodiment 2

[0045] In this embodiment, PI is selected as the flexible substrate, gold is used as the lower electrode material, and aluminum conductive tape is used as the upper electrode material.

[0046] (1) Evaporate the lower electrode on the clean PI substrate by thermal evaporation process. Configure Nb 2 CT x / Sodium alginate composite spinning solution: Weigh 0.36g sodium alginate powder, 1.0g dimethyl sulfoxide, 0.2g triton, 0.04g polyethylene oxide powder, 18.4g deionized water, 20mg Nb 2 CT x Powder, stir well and set aside.

[0047] (2) Preparation of Nb 2 CT x / Sodium alginate composite spinning film: spinning height: 20cm, spinning flow rate: 10μL / min, spinning voltage: 20KV; spin on the lower electrode for 20min, then dry for later use.

[0048] (3) Dip the spun film obtained in the previous step into 1 wt% copper acetate ethanol solution for cross-linking for 5 min, and dry it for later use.

[0049] (4) Use aluminum conductive tape to make a porous upper electrode...

Embodiment 3

[0051] In this embodiment, flexible waterproof paper is used as the flexible substrate, and conductive carbon black is used as the electrode material.

[0052] (1) A conductive carbon black electrode layer was prepared on a clean waterproof paper substrate by scraping process. Configure Nb 2 CT x / Sodium alginate composite spinning solution: Weigh 0.72g sodium alginate powder, 2.0g dimethyl sulfoxide, 0.4g triton, 0.08g polyethylene oxide powder, 36.8g deionized water, 100mg Nb 2 CT x Powder, stir well and set aside.

[0053] (2) Preparation of Nb 2 CT x / Sodium alginate composite spinning film: spinning height: 20cm, spinning flow rate: 15μL / min, spinning voltage: 15KV; spin on the lower electrode for 15min, then dry for later use.

[0054] (3) Soak the spinning membrane obtained in the previous step in 1 wt % ferric chloride ethanol solution for cross-linking for 10 min, and dry it for later use.

[0055] (4) Use the porous carbon black electrode layer as the upper e...

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Abstract

The invention discloses a self-powered humidity sensor based on a composite spinning film and a preparation method thereof, and relates to energy collection technology and sensitive electronics technology. Based on Nb 2 CT x The self-powered humidity sensor of the sodium alginate composite spinning film comprises a sensitive device and a spinning sensitive film arranged on the sensitive device, the sensitive device is an upper and lower electrode structure, and the sensitive film is made of Nb 2 CT x / Sodium alginate composites were prepared by electrospinning process. Utilize Nb 2 CT x The nanosheet and the nanocomposite fiber structure obtained by spinning provide a three-dimensional network space for the diffusion of water molecules; after the water molecules are adsorbed from top to bottom, the ion gradient diffuses to form a potential difference between the upper and lower electrodes and output a voltage signal. Compared with the traditional humidity sensor, the self-powered humidity sensor of the present invention does not require an external power supply system, and has the advantages of low power consumption, environmental protection, convenient portability, flexibility and lamination.

Description

technical field [0001] The invention belongs to the field of energy harvesting technology and sensitive electronics technology, and relates to a Nb-based 2 CT x / Sodium alginate composite spun film self-powered humidity sensor and preparation method thereof. Background technique [0002] With the development of modernization, it is difficult to find a field that has nothing to do with humidity, so humidity sensors that are closely related to human life are also gradually developing. Humidity sensors range from the earliest psychrometers and hair hygrometers to electronic humidity sensors in recent decades. Electronic humidity sensors are mainly divided into two categories: resistive and capacitive. However, traditional electronic humidity sensors are inseparable from external power drives, which limits the real-time monitoring of sensors in the Internet of Things. Therefore, the development of humidity sensors based on sustainable power generation is very important for gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/00H02N3/00D01D5/00
CPCG01N27/00H02N3/00D01D5/0015D01D5/0084
Inventor 太惠玲赵秋妮王斯段再华蒋亚东袁震黄琦刘勃豪
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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