Preparation method of a flexible three-dimensional porous graphene/polydimethylsiloxane composite triboelectric nanogenerator

A technology of dimethylsiloxane and nano-generators, applied in the direction of triboelectric generators, graphene, nano-carbon, etc., which can solve the problem that the three-dimensional porous graphene film flexible tribo-nanometer generators have not been realized, and it is difficult to fully utilize graphene characteristics, complex structure, etc., to achieve excellent electrical performance and work efficiency, good electrical output performance, and simple manufacturing process

Active Publication Date: 2021-06-11
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the structures of existing graphene-based triboelectric nanogenerators are relatively complex, and it is difficult to give full play to the characteristics of graphene, and flexible triboelectric nanogenerators based on three-dimensional porous graphene films have not yet been realized.

Method used

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  • Preparation method of a flexible three-dimensional porous graphene/polydimethylsiloxane composite triboelectric nanogenerator
  • Preparation method of a flexible three-dimensional porous graphene/polydimethylsiloxane composite triboelectric nanogenerator
  • Preparation method of a flexible three-dimensional porous graphene/polydimethylsiloxane composite triboelectric nanogenerator

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Experimental program
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Embodiment 1

[0036] (1) At room temperature, disperse 80 mg of graphite oxide in 40 mL of deionized water to form a dispersion with a concentration of 2 mg / mL, stir mechanically for 3 h, and ultrasonically in a water bath for 6 h to obtain a uniformly dispersed graphene oxide solution.

[0037] (2) Seal the bottom of the sand core funnel with plastic wrap, place the sand core funnel in a foam mold, then pour the graphene oxide solution in step (1) into the sand core funnel, and freeze with liquid nitrogen for 3 minutes to obtain graphite oxide ene "ice cubes"; remove the preservative film at the bottom of the sand core funnel, vacuum filter 24h, put the graphene oxide film together with the filter membrane into a freeze-dryer for freeze-drying 20h, then use 55% hydroiodic acid ( The mass ratio of graphene oxide to hydriodic acid is 1:10) and reduced for 1 h, washed with deionized water and alcohol alternately for 3 times, then put into a freeze dryer and freeze-dried for 12 h to obtain a fl...

Embodiment 2

[0047] (1) At room temperature, disperse 400mg of graphite oxide in 40mL of deionized water to form a dispersion with a concentration of 10mg / mL, mechanically stir for 5h, and ultrasonicate in a water bath for 10h to obtain a uniformly dispersed graphene oxide solution.

[0048] (2) Seal the bottom of the sand core funnel with plastic wrap, place the sand core funnel in a foam mold, then pour the graphene oxide solution in step (1) into the sand core funnel, and freeze with liquid nitrogen for 5 minutes to obtain graphite oxide ene "ice cubes"; remove the preservative film at the bottom of the sand core funnel, vacuum filter for 48h, put the graphene oxide film together with the filter membrane into a freeze-dryer for freeze-drying for 24h, then use 55% hydroiodic acid ( The mass ratio of graphene oxide to hydriodic acid is 1:50) and reduced for 1 h, washed with deionized water and alcohol alternately for 3 times, then put into a freeze dryer and freeze-dried for 12 h to obtain...

Embodiment 3

[0052] (1) At room temperature, disperse 20 mg of graphite oxide in 40 mL of deionized water to form a dispersion with a concentration of 0.5 mg / mL, stir mechanically for 1 h, and ultrasonicate in a water bath for 2 h to obtain a uniformly dispersed graphene oxide solution.

[0053] (2) Seal the bottom of the sand core funnel with plastic wrap, place the sand core funnel in a foam mold, then pour the graphene oxide solution in step (1) into the sand core funnel, and freeze with liquid nitrogen for 1 min to obtain graphite oxide ene "ice cubes"; remove the plastic wrap at the bottom of the sand core funnel, vacuum filter for 3h, put the graphene oxide film together with the filter membrane into a freeze-dryer for freeze-drying for 12h, then use 55% hydroiodic acid ( The mass ratio of graphene oxide to hydriodic acid was 1:100) and reduced for 10 minutes, washed alternately with deionized water and alcohol for 3 times, and then put into a freeze dryer for 12 hours to freeze-dry t...

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Abstract

The invention relates to a method for preparing a flexible three-dimensional porous graphene / polydimethylsiloxane composite friction nanogenerator, comprising: preparing a flexible three-dimensional porous graphene film by using an ice template method to assist gravity self-assembly, and using Joule heat The three-dimensional porous graphene / PDMS composite film is prepared by the method of assisted adsorption, and the three-dimensional porous graphene / PDMS composite film is connected with the current collector to prepare the triboelectric nanogenerator. The invention has a simple manufacturing process, uses graphene synthesized by chemical methods on the market, and has low cost; the prepared three-dimensional porous graphene / polydimethylsiloxane composite friction nanogenerator has a simple structure, is soft and light, and can be used in complex and multi-functional It is used in a variable environment, and has excellent mechanical properties and good cycle stability. Due to the good electrical conductivity of the graphene film and the large roughness of the PDMS surface, the generator has excellent electrical properties and working efficiency.

Description

technical field [0001] The invention belongs to the field of engine preparation, in particular to a method for preparing a flexible three-dimensional porous graphene / polydimethylsiloxane composite friction nanogenerator. Background technique [0002] With the continuous development of human society, the global energy crisis is becoming more and more serious. However, in the process of energy utilization, mechanical friction consumes most of the energy. Therefore, it is particularly important to effectively harvest the energy lost by mechanical friction. Especially, with the rapid development of flexible electronics and wearable devices, the study of flexible mechanical energy harvesting devices has very important practical value and practical significance. Traditional flexible generators are generally divided into two categories: (1) use the principle of electromagnetic induction to generate electricity, this type of generator needs conductive coils and magnets, and are gen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C01B32/194C08L83/04C08K7/24C08J5/18H02N1/04
CPCC01P2004/03C08J5/18C08J2383/04C08K7/24C01B32/184C01B32/194H02N1/04
Inventor 张青红龚维侯成义郭隐犇李耀刚王宏志
Owner DONGHUA UNIV
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