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Stress sensing conductive aerogel and preparation method thereof

A stress sensing and aerogel technology, applied in the field of aerogels, can solve the problems of poor strength, fragility, and volume shrinkage of nanocellulose aerogels, and achieve increased conductive networks, environmentally friendly materials, and conductive The effect of performance improvement

Pending Publication Date: 2021-04-16
ZHONGSHAN TIAN JIA PAPER PROD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical connection network of nanocellulose is very fragile. After cellulose pyrolysis, the cellulose macromolecules are severely degraded, resulting in poor strength of nanocellulose airgel. Although it has high compressibility, it is very easy to compress during the compression process. broken
In addition, the dehydration and removal of a large number of oxygen-containing groups during the pyrolysis process of cellulose lead to a severe shrinkage of the volume of nanocellulose.

Method used

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  • Stress sensing conductive aerogel and preparation method thereof
  • Stress sensing conductive aerogel and preparation method thereof

Examples

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preparation example Construction

[0027] like figure 2 As shown, the preparation method of the stress-sensing conductive airgel of the present invention comprises the following steps:

[0028] Step 100. Preparing a stable dispersion liquid——slowly adding graphene oxide into the ethanol solution, and performing ultrasonic dispersion; wherein, the ultrasonic dispersion is specifically ultrasonic dispersion at 80-100w ultrasonic power for 5-10 minutes.

[0029] Step 200. Prepare the graphene / silver nanowire dispersion——add the stable dispersion in step 100 to the ethylene glycol solution for preheating, and then add FeCl 3 and ethylene glycol solution, continue to heat, then add dropwise the AgNO 3 Mix the ethylene glycol mixed solution prepared by mixing with PVP evenly, and stir the reaction at a constant temperature, then cool to room temperature, wash the product with ethanol and deionized water, and finally re-disperse the product ultrasonically with deionized water to obtain graphite ene / nanosilver wire ...

Embodiment

[0034] The preparation process of the stress-sensing conductive airgel described in this example is as follows:

[0035] 1. Prepare a stable dispersion: graphene oxide is slowly added to the ethanol solution, and ultrasonically dispersed for 5 minutes under 100w ultrasonic power to form a stable dispersion (graphene oxide ethanol dispersion), and the concentration of the graphene oxide ethanol dispersion is 4mg / mL;

[0036] 2. Preparation of graphene / nanometer silver wire dispersion: Add the graphene oxide ethanol dispersion in step 1 into the ethylene glycol solution and pre-heat to 150°C-200°C for 1h, then add 0.6mmol / L FeCl 3 and ethylene glycol solution 2.5mL, continue heating for 10min; then AgNO 3 and PVP according to the molar ratio of 1:2 to prepare an ethylene glycol mixed solution, and after mixing evenly, add the above system dropwise at a certain speed (that is, add FeCl 3 And ethylene glycol solution and continue to heat the solution), ensure that the dropwis...

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Abstract

The invention relates to a stress-sensing conductive aerogel and a preparation method, the stress-sensing conductive aerogel has a three-dimensional network skeleton structure, and is prepared from a stable dispersion liquid, an ethylene glycol solution, FeCl3, an ethylene glycol mixed solution, deionized water, a PVA aqueous solution, PEG 4000, polyethylene glycol and a nanocellulose suspension; wherein the stable dispersion liquid is prepared from graphene oxide and an ethanol solution, and the PVA aqueous solution is prepared from polyvinyl alcohol and deionized water. The stress sensing conductive aerogel has highly developed porosity and excellent elasticity, and holes of a three-dimensional network skeleton structure can be shrunk along with increase of pressure, so that contact points between graphene / silver nanowire sheet layers are increased, conductive networks are increased, resistance is reduced, conductive performance is improved, compressibility is higher, and conductivity is higher. In addition, the material is prepared from a degradable biological material and is fused with a graphene / silver nanowire composite material, is environment-friendly, so that the material can be recycled and degraded.

Description

technical field [0001] The invention belongs to the technical field of airgel, and in particular relates to a stress-sensing conductive airgel and a preparation method thereof. Background technique [0002] With the rapid development of science and technology and economy, environmental pollution and resource shortage have become the main problems faced by human beings. Environmental protection has always been the goal of countries all over the world, and new environmentally friendly materials have also attracted more and more scholars' attention. Since the creation of polymer science in 1930, the rapid development of hydrocarbon polymers, the consumption of non-renewable resources such as petroleum and coal mines, and the extensive use of non-degradable polymers and their chemical products have caused a series of environmental pollution and energy shortages. . [0003] The applicant found that in recent years, airgel has been widely used in the fields of optoelectronics, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L71/02C08L1/02C08K3/04C08K7/00C08K3/08C08J9/28B82Y30/00B82Y40/00
Inventor 朱华杨陈挺谭康梅张俊
Owner ZHONGSHAN TIAN JIA PAPER PROD
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