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Aramid nanofiber/MXene composite conductive aerogel and preparation method thereof

A nanofiber and composite conductive technology, which is applied in the field of aramid nanofiber/MXene composite conductive aerogel and its preparation, can solve the problem of poor compression resilience, aramid nanofiber aerogel has no conductivity, and cannot apply pressure. Sensors and other issues, to achieve the effect of high compression resilience, good chemical stability, and simple and easy preparation process

Active Publication Date: 2020-04-21
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an aramid nanofiber / MXene composite conductive airgel and its preparation method, to overcome the fact that the existing aramid nanofiber aerogel has no electrical conductivity, poor compression resilience, and cannot be applied to pressure sensors The application problems in fields such as, the present invention adopts new technology, new method to develop and produce the aramid nanofiber / MXene composite conductive airgel with low density, high strength, high sensitivity, long cycle stability and service life, preparation process Simple and feasible, broad application prospects

Method used

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  • Aramid nanofiber/MXene composite conductive aerogel and preparation method thereof
  • Aramid nanofiber/MXene composite conductive aerogel and preparation method thereof
  • Aramid nanofiber/MXene composite conductive aerogel and preparation method thereof

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preparation example Construction

[0032] A preparation method of aramid nanofiber / MXene composite conductive aerogel, comprising the following steps:

[0033] Step 1: Prepare aramid nanofiber dispersion, mix 1 g of aramid chopped fibers with a length of 6 mm, 1.5 g of potassium hydroxide, 500 ml of dimethyl sulfoxide, a certain amount of deionized water, and the volume of deionized water is the same as that of 2 The volume ratio of methyl sulfoxide is (1:50~1:15); firstly add potassium hydroxide, then add deionized water, stir with magnetic stirrer for 5min~20min, then add aramid chopped fibers and The order of addition of dimethyl sulfoxide was placed in a sealed beaker, and a magnetic stirrer was used to stir and react for 2h to 4h at a rotational speed of 1200r / min to 1500r / min, to obtain a mass concentration of 0.2% dispersed in dimethyl sulfoxide. The aramid nanofiber dispersion in the aramid nanofiber, wherein the diameter of the aramid nanofiber is 12-15nm and the length is 4-7μm;

[0034] Step 2: Prep...

Embodiment 1

[0041] An aramid nanofiber / MXene composite conductive aerogel, the aramid nanofiber / MXene composite conductive aerogel is composed of aramid nanofiber and MXene, and the mass ratio of aramid nanofiber and MXene is 40:60; The mass of the aramid nanofiber / MXene composite conductive aerogel is 600 mg and the density is 40 mg / cm 3 .

[0042] A preparation method of aramid nanofiber / MXene composite conductive aerogel, comprising the following steps:

[0043] Step 1: Prepare aramid nanofiber dispersion, mix 1 g of aramid chopped fibers with a length of 6 mm, 1.5 g of potassium hydroxide, 500 ml of dimethyl sulfoxide, a certain amount of deionized water, and the volume of deionized water is the same as that of 2 The volume ratio of methyl sulfoxide is 1:50; according to the order of adding potassium hydroxide first, then adding deionized water, mixing and stirring with a magnetic stirrer for 5 minutes, then adding aramid chopped fibers and dimethyl sulfoxide in turn It was placed i...

Embodiment 2

[0049] An aramid nanofiber / MXene composite conductive aerogel, the aramid nanofiber / MXene composite conductive aerogel is composed of aramid nanofiber and MXene, and the mass ratio of aramid nanofiber and MXene is 45:55; The mass of the aramid nanofiber / MXene composite conductive aerogel is 500 mg and the density is 30 mg / cm 3 .

[0050] A preparation method of aramid nanofiber / MXene composite conductive aerogel, comprising the following steps:

[0051] Step 1: Prepare aramid nanofiber dispersion, mix 1 g of aramid chopped fibers with a length of 6 mm, 1.5 g of potassium hydroxide, 500 ml of dimethyl sulfoxide, a certain amount of deionized water, and the volume of deionized water is the same as that of 2 The volume ratio of methyl sulfoxide is 1:40; according to the order of adding potassium hydroxide first, then adding deionized water, mixing and stirring with a magnetic stirrer for 8 minutes, then adding aramid chopped fibers and dimethyl sulfoxide in turn It was placed i...

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Abstract

The invention discloses aramid nanofiber / MXene composite conductive aerogel and a preparation method thereof. By using aramid nanofibers with a nano-scale structure, high strength, a large length-diameter ratio and high temperature resistance as a matrix and using MXene with excellent conductivity, good chemical stability and a unique two-dimensional nano-film structure as a conductive and fillingcoating material, the aramid nanofiber / MXene composite conductive aerogel with low density, high strength and high compression resilience is prepared. The preparation method specifically comprises the following steps: preparing an aramid nanofiber dispersion liquid, preparing an MXene dispersion liquid, preparing an aramid nanofiber / MXene composite dispersion liquid, preparing a gelatinous aramidnanofiber / MXene composite material and the like, thereby obtaining the aramid nanofiber / MXene composite conductive aerogel. The preparation process is simple and easy to implement, and the obtained aramid nanofiber / MXene composite conductive aerogel has wide application prospects in the fields of pressure sensing, intelligent sensors, wearable equipment and the like.

Description

technical field [0001] The invention belongs to the fields of polymer nanomaterials and strain sensors, in particular to an aramid nanofiber / MXene composite conductive aerogel and a preparation method thereof. Background technique [0002] Due to its high porosity, low density, and controllable three-dimensional porous structure, aerogels show broad application prospects in the fields of adsorption, heat insulation, and energy storage. Conductive aerogels not only have the advantages of the above-mentioned aerogels, but also have great application potential in the fields of fuel cells, catalysis, supercapacitors, sensors, and wearable devices due to their excellent electrical conductivity. At present, most of the conventional conductive aerogels are carbon-based aerogels obtained by pyrolysis at high temperature (>1000 °C). Oxygen-free and other harsh conditions, so it is usually impossible to mass-produce. In addition, traditional carbon-based aerogels often exhibit lo...

Claims

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Application Information

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IPC IPC(8): C08J9/28C08L77/10C08K3/14G01L1/00
CPCC08J9/28G01L1/005C08J2205/026C08J2377/10C08J2201/0482C08K2201/001C08K3/14
Inventor 杨斌王琳张美云谭蕉君宋顺喜丁雪瑶
Owner SHAANXI UNIV OF SCI & TECH
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