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Heating modified MXene/ferroferric oxide composite wave-absorbing material and preparation method thereof

A composite wave-absorbing material, the technology of ferroferric oxide, which is applied in the direction of iron oxide/iron hydroxide, ferric oxide, nanotechnology for materials and surface science, etc., can solve cumbersome experimental operations and destroy MXene Problems such as layered structure and narrow absorbing frequency band of composite materials can achieve the effect of enhancing interface polarization, improving impedance matching, and enhancing absorbing effect

Inactive Publication Date: 2020-12-08
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structural design of MXene requires tedious and delicate experimental operations, which is not conducive to industrial application.
Although the process of making MXene into composite materials is simple, it is difficult to uniformly disperse different components in the composite material, thus destroying the layered structure of MXene; and the absorption frequency band of composite materials is generally narrow, which restricts its application.

Method used

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  • Heating modified MXene/ferroferric oxide composite wave-absorbing material and preparation method thereof
  • Heating modified MXene/ferroferric oxide composite wave-absorbing material and preparation method thereof
  • Heating modified MXene/ferroferric oxide composite wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Nitrogen is used as protective gas, and the set temperature of the tube furnace is 400°C

[0027] Step 1. Measure 3.75ml of distilled water and slowly add it dropwise to 11.25ml of concentrated hydrochloric acid. Weigh 1 g of lithium fluoride and 1 g of aluminum carbon-titanium oxide, slowly add to the obtained hydrochloric acid, and magnetically stir at 250 rpm for 24 h in a water bath at 30°C. The product was centrifuged and washed four times with distilled water, and dispersed into 100 ml of distilled water to obtain an MXene dispersion.

[0028]Step 2. Measure 20ml of the MXene dispersion obtained in step 1, weigh 0.7g of anhydrous ferric chloride, and 0.6g of ferrous sulfate heptahydrate, and disperse them in 80ml of distilled water. At 600 rpm, under a nitrogen atmosphere, the water bath was heated to 80° C., 4 ml of ammonia water was added dropwise, and the reaction was continued for 30 minutes. The resulting product was washed three times with disti...

Embodiment 2

[0030] Example 2: Argon is used as the protective gas, and the set temperature of the tube furnace is 600°C

[0031] Step 1. Measure 3.75ml of distilled water and slowly add it dropwise to 11.25ml of concentrated hydrochloric acid. Weigh 1.5 g of lithium fluoride and 1 g of aluminum carbon-titanium oxide, slowly add to the obtained hydrochloric acid, and stir magnetically at 250 rpm for 24 h in a water bath at 40°C. The product was centrifuged and washed four times with distilled water, and dispersed into 100 ml of distilled water to obtain an MXene dispersion.

[0032] Step 2. Measure 20ml of the MXene dispersion obtained in step 1, weigh 0.7g of anhydrous ferric chloride, and 0.6g of ferrous sulfate heptahydrate, and disperse them in 80ml of distilled water. At 600 rpm, under a nitrogen atmosphere, the water bath was heated to 80° C., 4 ml of ammonia water was added dropwise, and the reaction was continued for 30 minutes. The resulting product was washed three times with d...

Embodiment 3

[0034] Example 3: Helium is used as the protective gas, and the set temperature of the tube furnace is 800°C

[0035] Step 1. Measure 3.75ml of distilled water and slowly add it dropwise to 11.25ml of concentrated hydrochloric acid. Weigh 1.2 g of lithium fluoride and 1 g of aluminum carbon-titanium oxide, slowly add to the obtained hydrochloric acid, and stir magnetically at 250 rpm for 24 h in a 35° C. water bath. The product was centrifuged and washed four times with distilled water, and dispersed into 100 ml of distilled water to obtain an MXene dispersion.

[0036] Step 2. Measure 20ml of the MXene dispersion obtained in step 1, weigh 0.7g of anhydrous ferric chloride, and 0.6g of ferrous sulfate heptahydrate, and disperse them in 80ml of distilled water. At 600 rpm, under a nitrogen atmosphere, the water bath was heated to 80° C., 4 ml of ammonia water was added dropwise, and the reaction was continued for 30 minutes. The resulting product was washed three times with d...

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Abstract

The invention relates to a heating modified MXene / ferroferric oxide composite wave-absorbing material and a preparation method thereof. Magnetic ferroferric oxide particles (Fe3O4) are grown in situ on the surface of a two-dimensional material MXene (Ti3C2Tx), and the MXene is heated in a tubular furnace to be partially oxidized into titanium dioxide (TiO2) to finally obtain the layered compositematerial. MXene and TiO2 are dielectric loss wave-absorbing materials, and Fe3O4 is a magnetic loss wave-absorbing material, so that the obtained composite material can synergistically absorb electromagnetic waves through dielectric loss and magnetic loss mechanisms, and the wave-absorbing effect is enhanced. Meanwhile, the composite material has a layered structure, so that electromagnetic wavescan be subjected to multiple interlayer reflection in the composite material and are more easily absorbed by the composite material. And finally, the impedance matching of MXene is improved by Fe3O4 and TiO2, the interfacial polarization of the composite material is enhanced by the multi-component structure, and the wave absorbing effect of the composite material is further enhanced.

Description

technical field [0001] The invention belongs to a preparation method of a composite material, and relates to a heat-modified MXene / ferric oxide composite wave-absorbing material and a preparation method. Background technique [0002] With the development of modern technology, electromagnetic pollution is becoming more and more serious, which not only interferes with the normal operation of electromagnetic equipment, but may even cause harm to human health. Therefore, it is imperative to develop new and efficient wave-absorbing materials. [0003] Traditional absorbing materials are made of metals or metal oxides, which have high conductivity and good air permeability, but they are not ideal due to their shortcomings such as high density, narrow absorption bandwidth, poor impedance matching, and easy corrosion. Therefore, it is very important to develop materials with wide absorption band, good performance, light weight and low cost. MXene is a two-dimensional material forme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08C01B32/921B82Y40/00B82Y30/00B82Y25/00H05K9/00
CPCC01G49/08C01B32/921B82Y40/00B82Y30/00B82Y25/00H05K9/0081C01P2004/80C01P2006/42C01P2004/03
Inventor 张秋禹陈志聪刘锦
Owner NORTHWESTERN POLYTECHNICAL UNIV
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