Stretchable coaxial fibrous friction electricity generating and sensing device and preparation method thereof

A technology of triboelectric power generation and sensor devices, which is applied in the direction of triboelectric generators, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as unsuitable for large-scale application, complicated preparation process, and unsuitable for wearing, and achieve low Cost, excellent performance, scientific and reasonable structural design

Active Publication Date: 2017-05-31
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Most of the above-mentioned triboelectric devices use metal electrodes to collect the induced charges. Due to the heavy weight and poor flexibility of metal materials, they are prone to breakage and failure during stretching, so they are not suitable for human body wear; in addition, the metal electrode processing process often requires Photolithography, electron beam deposition, reactive ion etching and other micro-processing methods, the preparation process is complicated, the cost is high, and it is not suitable for large-scale application

Method used

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  • Stretchable coaxial fibrous friction electricity generating and sensing device and preparation method thereof
  • Stretchable coaxial fibrous friction electricity generating and sensing device and preparation method thereof
  • Stretchable coaxial fibrous friction electricity generating and sensing device and preparation method thereof

Examples

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Embodiment 1

[0036] (1) Preparation of fibrous elastic substrate: Polydimethylsiloxane and crosslinking agent were formulated into a solution with a mass percentage concentration of 9%, and the solution was injected into a heat shrinkable tube with an inner diameter of 0.5 mm, and cured at 80 °C 2h, peel off the outer layer of heat-shrinkable tube to obtain a fibrous polydimethylsiloxane elastic substrate;

[0037] (2) Preparation of flexible carbon nanotube inner electrode: using the fibrous polydimethylsiloxane elastic substrate prepared in step (1), the oriented carbon nanotube film was pulled out from the carbon nanotube array obtained by the vapor phase chemical deposition method and Attached to the fibrous elastic substrate, use a stepping motor on the translation platform to evenly wrap the carbon nanotube film on the elastic substrate. The motor speed is 1000r / min, and the number of wrapping layers is 4 layers. The nanotubes shrink to dense, and the flexible fibrous carbon nanotube...

Embodiment 2

[0042] (1) Preparation of fibrous elastic substrate: Polydimethylsiloxane and cross-linking agent are formulated into a solution with a concentration of 9% by mass, and the solution is injected into a heat shrinkable tube with an inner diameter of 1.0 mm, and cured at 80 °C After 2.5 h, peel off the outer heat-shrinkable tube to obtain a fibrous polydimethylsiloxane elastic substrate;

[0043] (2) Preparation of flexible carbon nanotube inner electrode: use the fibrous polydimethylsiloxane elastic substrate prepared in step (1); pull out the oriented carbon nanotube film from the carbon nanotube array obtained by the vapor phase chemical deposition method and Attached to the fibrous elastic substrate, the carbon nanotube film is evenly wrapped on the elastic substrate by using a stepping motor on the translation platform. The motor speed is 1500r / min, and the number of wrapping layers is 5 layers. The nanotubes shrink to dense, and the inner electrode of flexible carbon nanotu...

Embodiment 3

[0048] (1) Preparation of fibrous elastic substrate: Polydimethylsiloxane and crosslinking agent are formulated into a solution with a concentration of 9% by mass, and the solution is injected into a heat-shrinkable tube with an inner diameter of 1.5 mm, and cured at 80 °C 3 h, peel off the outer heat-shrinkable tube to obtain a fibrous polydimethylsiloxane elastic substrate;

[0049] (2) Preparation of flexible carbon nanotube inner electrode: use the fibrous polydimethylsiloxane elastic substrate prepared in step (2); pull out the oriented carbon nanotube film from the carbon nanotube array obtained by the vapor phase chemical deposition method and Attached to the fibrous elastic substrate, and then use a stepping motor on the translation platform to evenly wrap the carbon nanotube film on the elastic substrate. The motor speed is 2000r / min, and the number of wrapping layers is 6 layers. The carbon nanotubes shrink to dense, and the flexible fibrous carbon nanotube inner ele...

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Abstract

The invention belongs to the technical field of friction electricity generating and in particular relates to a stretchable coaxial fibrous friction electricity generating and sensing device and a preparation method thereof. The preparation method comprises the following steps: utilizing macromolecular materials of different dielectric constants as a friction electricity generating layer and an oriented carbon nanotube film as a charge inducing and collecting electrode; firstly swathing the oriented carbon nanotube film on a fibrous macromolecular elastic substrate to be taken as an inner-layer electrode, then sequentially constructing two macromolecular friction generating layers with micro-nano structures on the contact surfaces on the surface of the carbon nanotube film, then swathing a carbon nanotube film layer to be taken as an outer-layer electrode, and finally encapsulating, so that the stretchable coaxial fibrous friction electricity generating device is obtained. The device is simple in preparation process, has good flexibility and respectively can produce an electric signal under the actions of stretching, bending, compressing and twisting, so that mechanical energy in different directions and different forms in an external environment can be collected and converted into electric energy; and the device can be taken as a power supply for supplying power to wearable electronic equipment and also can be taken as a sensing device for detecting motion and physiological signals of a human body.

Description

technical field [0001] The invention belongs to the technical field of friction power generation, and in particular relates to a stretchable coaxial fibrous friction power generation and sensor device and a preparation method. Background technique [0002] In recent years, a large number of wearable electronic devices have emerged. After such devices are attached to the human body surface through wear, they can monitor physiological signals in real time and realize automatic interaction of human-computer information. Here comes a new experience. The current popular wearable electronic devices all need batteries as the energy supply unit to drive the device to work. However, the lack of battery life of traditional batteries seriously restricts the future development of wearable electronic devices, and most of the current wearable electronic devices use traditional blocks. Shaped batteries are used as power sources. Due to their large size, heavy weight, and inflexibility, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N1/04B82Y30/00B82Y40/00
Inventor 彭慧胜禹兴海潘剑孙雪梅
Owner FUDAN UNIV
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