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Flexible pressure sensor based on shaddock peel carbon and preparation method and application thereof

A technology of pressure sensor and grapefruit peel, which is applied in the direction of sensor, application, and measurement of the property and force of piezoelectric devices. It can solve the problems of inability to directly apply pressure sensors and low mechanical strength, and achieve excellent stability and good mechanical properties. , Improve the effect of sensitivity and responsiveness

Pending Publication Date: 2021-08-24
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the carbon material prepared by direct carbonization of grapefruit peel can well maintain the 3D natural porous structure, the overall material exhibits low mechanical strength and brittleness, which cannot be directly applied to pressure sensors.

Method used

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preparation example Construction

[0021] The invention provides a method for preparing a flexible pressure sensor based on grapefruit peel carbon, comprising the following steps:

[0022] (1) carry out hydrothermal reaction to pomelo peel, obtain grapefruit peel hydrogel;

[0023] (2) After the grapefruit peel hydrogel obtained in the step (1) is dried, it is carbonized to obtain a 3D porous carbon aerogel;

[0024] (3) The 3D porous carbon airgel obtained in the step (2) is mixed with a flexible polymer to carry out a curing reaction to obtain a flexible airgel based on grapefruit peel carbon;

[0025] (4) The flexible aerogel based on grapefruit peel carbon obtained in the step (3) is connected to a copper electrode and packaged to obtain a flexible pressure sensor based on grapefruit peel carbon.

[0026] In the invention, the grapefruit peel is subjected to hydrothermal reaction to obtain the grapefruit peel hydrogel.

[0027] In the present invention, the source of the grapefruit peel is not particularl...

Embodiment 1

[0060] (1) Cut the fresh pomelo peel into uniform blocks, wash it with ultrapure water, and then place it in a reaction kettle, put the reaction kettle in an oven, and heat it at a temperature of 5°C / min under the condition of 180°C React for 10 hours, carry out hydrothermal reaction, after the completion of the hydrothermal reaction, fully react in hot water at 80°C, remove the unreacted impurities therein, and obtain grapefruit peel hydrogel;

[0061] (2) Freeze-dry the grapefruit peel hydrogel obtained in the step (1) for 48 hours at -48°C, and then carbonize at a carbonization temperature of 800°C to obtain a 3D porous carbon aerogel;

[0062] (3) Mix the 3D porous carbon airgel obtained in the step (2) with polydimethylsiloxane, react at 25°C for 24h for curing reaction, and obtain a flexible airgel based on pomelo peel carbon; wherein , the mass ratio of 3D porous carbon airgel to polydimethylsiloxane is 1:5, the mass ratio of polydimethylsiloxane main agent to curing ag...

Embodiment 2

[0066] (1) adopt embodiment 1 step (1) preparation method to prepare pomelo peel hydrogel;

[0067] (2) Freeze-dry the grapefruit peel hydrogel obtained in the step (1) for 48 hours at -48°C, and then carbonize at a carbonization temperature of 800°C to obtain a 3D porous carbon aerogel;

[0068] (3) Mix the 3D porous carbon airgel obtained in the step (2) with polydimethylsiloxane, react at 50° C. for 10 h for curing reaction, and obtain a flexible airgel based on grapefruit peel carbon; wherein , the mass ratio of 3D porous carbon airgel to polydimethylsiloxane is 1:10, the mass ratio of polydimethylsiloxane main agent to curing agent is 10:1, and the main agent components are: Four (trimethylsilyloxy), curing agent composition is: tetramethyltetravinyl cyclotetrasiloxane;

[0069] Specifically, the method of mixing 3D porous carbon airgel with polydimethylsiloxane is: dilute the main agent and curing agent of polydimethylsiloxane with n-hexane and mix with 3D porous carbon...

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Abstract

The invention provides a flexible pressure sensor based on shaddock peel carbon and a preparation method and application thereof, and relates to the technical field of biomass material processing materials. According to the preparation method, the shaddock peel is subjected to hydrothermal reaction, and part of organic matters such as saccharides and hemicellulose can be removed in the process; the shaddock peel hydrogel is carbonized to obtain the 3D porous carbon aerogel, the 3D structure of the carbon aerogel can be fully reserved in the process, and when the flexible pressure sensor is prepared from the 3D porous carbon aerogel, on one hand, the mechanical property of the pressure sensor can be improved; on the other hand, sensitivity and response time of the pressure sensor can be improved; the 3D porous carbon aerogel is mixed with the flexible polymer, the flexible polymer can be filled in the 3D porous carbon aerogel, and a flexible elastomer is formed through a curing reaction, so that the prepared flexible pressure sensor has excellent stability and mechanical performance and good sensing performance.

Description

technical field [0001] The invention relates to the technical field of biomass material processing materials, in particular to a flexible pressure sensor based on grapefruit peel carbon and its preparation method and application. Background technique [0002] Flexible pressure sensors that can convert external pressure into electrical signal output have attracted extensive attention and have great potential for applications in various fields, such as wearable electronics, robotics, and real-time health monitoring. At present, there are two effective ways to improve the sensitivity and working pressure range of flexible pressure sensors by introducing advanced conductive materials and constructing good microstructures: on the one hand, using materials with good conductivity such as metal nanoparticles, metal nanowires, metal Membranes, metal oxides, carbon nanotubes, graphene, conductive polymers, and bio-based carbonized materials have been used to fabricate pressure sensors...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/16A61B5/00A61B5/11C08K7/24
CPCG01L1/16A61B5/6801A61B5/6843A61B5/1121C08K7/24A61B2562/12A61B2562/125C08L101/00
Inventor 陈昌洲郑娜吴伟鑫唐梦琪李湘钰闵斗勇
Owner GUANGXI UNIV
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