Flexible conductive MXene-based foam and preparation method thereof

A flexible conductive and foam technology, which is applied in the field of two-dimensional metal carbide-based flexible conductive foam materials and its preparation, can solve the problems of poor mechanical and electrical properties and application performance, and achieve rich pores, high reactivity, and high specific surface area. Effect

Inactive Publication Date: 2020-06-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of stacking and agglomeration of two-dimensional MXene nanosheets in the preparation and application process and the poor mechanical, electrical and application performance of macroscopic MXene materials, the present invention aims to provide a new type of highly flexible and highly conductive MXene-based foam and its Preparation

Method used

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  • Flexible conductive MXene-based foam and preparation method thereof
  • Flexible conductive MXene-based foam and preparation method thereof
  • Flexible conductive MXene-based foam and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] 1g LiF was slowly added to 20mL 9M HCl solution, followed by 1g Ti 3 AlC 2 MAX powder (>400 mesh) was dispersed in the above mixed solution, and the suspension was placed in a water bath environment at 35°C and vigorously stirred at a speed of 500rpm for 24 hours. Then centrifuge the suspension at 3500rpm for 5 minutes, pour off the upper layer of acidic liquid, redisperse the lower layer of centrifuge into 40mL deionized water, mix well and centrifuge at 3500rpm for 5 minutes, repeat washing and centrifugation 4 times until the centrifuge The pH is around 6. Finally, the obtained centrifuge was dispersed into 20mL deionized water again, shaken vigorously for 20 minutes, and centrifuged at a speed of 1500rpm for 60 minutes to obtain the upper suspension, denoted as Ti 3 C 2 MXene, its concentration is about 35mg / mL. figure 1 Its transmission electron microscope picture, can find: the Ti of gained Ti prepared by this method 3 C 2 MXene materials have an ultrathin n...

Embodiment 2

[0029] 1g Ti 3 AlC 2(>400 mesh) and 120ml 40% HF acid shaking reaction for 72 hours, centrifuged at 6000rpm for 5 minutes, poured the supernatant centrifugate, mixed the centrifuged product with water and continued to centrifuge until the pH value of the centrifuged solution was ~6, and placed the obtained centrifuged product in 60 After vacuum drying at ℃ for 24 hours, an accordion-shaped multilayer Ti can be obtained 3 C 2 MXene. Take 0.3g multilayer Ti 3 C 2 MXene was added to 5mL DMSO, stirred at room temperature at 300rpm for 18 hours, and centrifuged at 5000rpm for 5 minutes to obtain a sediment. 3 C 2 The mass ratio of MXene to deionized water is 1:500, add deionized water, ultrasonically treat the suspension for 6 hours, centrifuge at 3500rpm for 5 minutes, collect the upper centrifugate, and obtain a few-layer Ti 3 C 2 MXene nanosheet dispersion. Cut polyurethane foam to size and soak completely in Ti 3 C 2 Squeeze out the excess liquid in the MXene dispers...

Embodiment 3

[0031] 1g Ti 3 SiC 2 (>400 mesh) and 60% HF acid shaking reaction for 72 hours, Ti 3 SiC 2 The mass ratio of MAX to HF acid is 1:140, centrifuge at 6000rpm for 5 minutes, pour out the supernatant centrifugate, add water to mix and centrifuge until the pH of the centrifugate is ~6, and place the obtained centrifuge at 60°C for 24 hours to obtain an accordion multilayer Ti 3 C 2 MXene. Take 0.3g multilayer Ti 3 C 2 MXene added to DMSO, Ti 3 C 2 The mass ratio of MXene to DMSO is 0.5:1. Stir at room temperature at 300rpm for 18 hours, and centrifuge at 5000rpm for 5 minutes to obtain a sediment. 3 C 2 The mass ratio of MXene to deionized water is 1:500, add deionized water, ultrasonically treat the suspension for 6 hours, centrifuge at 3500rpm for 5 minutes, collect the upper centrifugate, and obtain a few-layer Ti 3 C 2 MXene nanosheet dispersion. Cut PVC foam to size and completely soak in Ti 3 C 2 Squeeze out the excess liquid in the MXene dispersion, place it ...

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Abstract

The invention discloses flexible conductive MXene-based foam and a preparation method thereof, wherein the flexible conductive MXene-based foam is formed by compounding a two-dimensional metal carbon / nitride nanosheet (MXene) and flexible non-conductive polymer foam. The preparation process mainly comprises preparation of a high-conductivity MXene nano-sheet dispersion liquid and construction of MXene-based composite foam, wherein the MXene-based composite foam perfectly integrates high conductivity and hydrophilicity of MXene and flexibility of polymer foam, so that the MXene-based compositefoam has the characteristics of high flexibility, hydrophilicity and high conductivity. The method is simple and easy to implement, the problem of MXene-based foam construction is effectively solved,and the obtained three-dimensional MXene-based foam material has excellent physical, chemical and mechanical properties and has huge application prospects in the fields of catalysis, sensors, photothermal conversion, electromagnetic shielding, composite materials, electrochemical energy storage and the like.

Description

technical field [0001] The invention belongs to the field of nano energy materials, and in particular relates to a two-dimensional metal carbide-based flexible conductive foam material and a preparation method thereof. Background technique [0002] Two-dimensional MXene nanosheets are a two-dimensional nanomaterial obtained by etching and exfoliating the dense layered metal carbide MAX phase. It has high reactivity and large specific surface area, so it is used in energy storage, catalysis, adsorption , light-to-heat conversion and other fields have good application prospects. However, the surface of two-dimensional MXene nanosheets is rich in oxygen-containing and fluorine-containing functional groups, and the hydrogen bonds or van der Waals forces between them will make it easy to stack and agglomerate MXene nanosheets into a dense film material during preparation, drying and application, resulting in a decrease in material performance. . For example, in energy storage a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08L61/28C08L75/04C08L27/06C08L25/06C08K3/14
CPCC08J9/40C08J2325/06C08J2327/06C08J2361/28C08J2375/04C08K3/14
Inventor 吴忠帅董琰峰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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