WO2023077620A1 - 一种基于MXene废弃沉淀制备的电磁波吸收材料及其制备方法和应用 - Google Patents
一种基于MXene废弃沉淀制备的电磁波吸收材料及其制备方法和应用 Download PDFInfo
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- WO2023077620A1 WO2023077620A1 PCT/CN2021/137984 CN2021137984W WO2023077620A1 WO 2023077620 A1 WO2023077620 A1 WO 2023077620A1 CN 2021137984 W CN2021137984 W CN 2021137984W WO 2023077620 A1 WO2023077620 A1 WO 2023077620A1
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- mxene
- electromagnetic wave
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- absorbing material
- waste
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
Definitions
- the invention belongs to the technical field of nanomaterials and electromagnetic wave absorbing materials, and in particular relates to an electromagnetic wave absorbing material prepared based on waste precipitation of MXene and its preparation method and application.
- Electromagnetic waves have been widely used in the fields of radar, advanced detectors, and precision weapons, which have also caused thorny problems such as electromagnetic pollution, electromagnetic interference, and electromagnetic leakage.
- the development of high-efficiency absorbing materials is of great significance to environmental protection, human health, and information security.
- various new electromagnetic wave absorbing materials have been developed to resist electromagnetic wave radiation and interference.
- MXene is a two-dimensional layered early transition metal carbide, nitride or carbonitride. MXene materials are used in the research of microwave absorbing materials due to their special two-dimensional structure, high electrical conductivity, large surface area, and low density.
- the current mainstream method for preparing MXene nanosheets has a low yield, and a large amount of waste precipitation ( ⁇ 80-90%) will be generated after MXene stripping.
- the present invention utilizes a large amount of waste precipitation produced after MXene stripping An electromagnetic wave absorbing material is prepared as a raw material.
- a MXene/PPy composite wave absorber and its preparation method are disclosed in the closest prior art patent No. CN 112292015 A; a FeCo@MXene core-shell is disclosed in the patent No. CN 110283570 A Structural composite wave-absorbing material and its preparation method; the patent No. CN 112251193 A discloses a composite wave-absorbing material based on MXene and metal organic framework and its preparation method and application; the above comparative documents all pass MXene and The combination of other absorbing materials improves the absorbing performance of MXene and broadens the effective absorption bandwidth to a certain extent. However, its ability to absorb electromagnetic waves still needs to be improved, and the cost of MXene raw materials is high, and the preparation steps of composite materials are complicated.
- MXene waste precipitated absorbing materials have the advantages of low cost and simple preparation process.
- the waste precipitates generated after stripping MXene nanosheets can be reused, but there is no research on the preparation of absorbing materials based on MXene waste precipitates. material reports. Therefore, designing and preparing a preparation method for electromagnetic wave absorbing materials based on MXene waste precipitation can develop new electromagnetic wave absorbing materials in a simpler and environmentally friendly way to obtain better absorption performance.
- the object of the present invention is to design and provide an electromagnetic wave absorbing material prepared based on waste precipitation of MXene and its preparation method and application.
- the preparation method of the microwave-absorbing material of the present invention is simple, and the waste precipitation of MXene is used for a second time, thereby reducing the cost and protecting the environment; through the carbonization treatment, the microwave-absorbing performance and the microwave-absorbing bandwidth of the microwave-absorbing material are effectively improved.
- An electromagnetic wave absorbing material prepared based on MXene waste precipitation is characterized in that the electromagnetic wave absorbing material is obtained by using the remaining MXene waste precipitation after preparing MXene by MAX phase etching as a raw material, collecting, drying, and carbonizing.
- the described electromagnetic wave absorbing material prepared based on MXene waste precipitation is characterized in that the carbonization treatment is as follows: the dried MXene waste precipitation is placed in a crucible, and put into a tube furnace under N atmosphere 400-1000 °C carbonization for 1-5 h to obtain an electromagnetic wave absorbing material.
- the preparation method is characterized in that the MAX phase in the step (1) includes one or more of Ti 3 AlC 2 , Ti 2 AlC, and Nb 2 AlC, preferably Ti 3 AlC 2 , and the MXene is an accordion shape.
- the preparation method is characterized in that the etchant in the step (1) includes one of HF or a LiF/HCl composite solvent, preferably the etchant is a LiF/HCl composite solvent.
- the preparation method is characterized in that the etching treatment conditions in the step (1) are: rotation speed 200-400rpm, temperature 35-50 °C, reaction time 24-48 h.
- the preparation method is characterized in that the rotational speed of the centrifuge in the step (2) is 1500-3500r/min.
- the preparation method is characterized in that the drying in the step (3) includes vacuum drying, and the conditions of the vacuum drying are: drying temperature 40-70 °C, drying time 12-48 h.
- the preparation method is characterized in that the specific operation of the carbonization treatment in the step (4) is: place the dried MXene waste precipitate in a crucible, put it into a tube furnace, and place it in a N 2 atmosphere at 400-1000 ° C is carbonized for 1-5 h to obtain an electromagnetic wave absorbing material.
- the present invention has the following beneficial effects:
- the waste precipitation of MXene includes unetched MAX phases, single-layer or multilayer MXene nanosheets, etc., and these unetched successful MAX phases and multilayer MXene reduce the electrical conductivity of waste precipitation and improve The degree of impedance matching between waste precipitation and electromagnetic waves is improved, and the interface between materials is increased.
- the present invention further improves the impedance matching ability of the material by carbonizing the MXene waste precipitation, enhances the wave absorption ability between 2 GHz and 18 GHz in the low frequency band, and the maximum absorption (reflectivity) of electromagnetic waves reaches -43.8 dB, showing Excellent absorbing ability.
- the method of the invention is simple, and the waste precipitation of MXene is used for secondary utilization, and the wave-absorbing performance and wave-absorbing bandwidth of the wave-absorbing material are effectively improved.
- Fig. 1 is the scanning electron micrograph of the wave-absorbing material prepared based on MXene discarded precipitation obtained in embodiment 1;
- Fig. 2 is the electromagnetic parameter diagram in the 2-18 GHz frequency band of the absorbing material containing 40 wt.% based on the waste precipitation of MXene prepared in Example 2;
- Fig. 3 is the wave-absorbing performance diagram in the 2-18 GHz frequency band of the wave-absorbing material containing 40 wt.% based on the waste precipitation of MXene prepared in Example 2;
- Fig. 4 is the electromagnetic parameter diagram in the 2-18 GHz frequency band containing 50wt.% absorbing material prepared based on MXene waste precipitation in Example 3;
- Fig. 5 is a diagram of the absorbing performance of the absorbing material in Example 3 containing 50 wt.% based on waste precipitation of MXene prepared in the 2-18 GHz frequency band.
- the preparation method of the wave-absorbing material prepared based on MXene waste precipitation is as follows:
- Step 1 adding the MAX phase into the etchant for etching to obtain MXene.
- the MAX phase is selected from one or more of Ti 3 AlC 2 , Ti 2 AlC, and Nb 2 AlC, preferably Ti 3 AlC 2 .
- the etching method refers to the existing reports, and proceeds as follows:
- the etchant is selected from one of HF or LiF/HCl composite solvent, preferably the etchant is LiF/HCl composite solvent.
- the etchant is selected from one of HF or LiF/HCl composite solvent, preferably the etchant is LiF/HCl composite solvent.
- Step 2 Transfer the etched suspension to a centrifuge tube, wash and centrifuge it repeatedly with deionized water to neutrality, the centrifuge speed is 3500r/m, and then shake and centrifuge 10 times in sequence.
- the upper layer of MXene nanosheet dispersion is collected, and the lower layer of precipitation is collected, that is, the waste precipitation of MXene.
- Step 3 The discarded MXene precipitate collected in step 2 was vacuum-dried at 50 °C for 12 h for later use.
- Step 4 Put the dried MXene waste precipitate in a crucible, put it into a tube furnace and carbonize it at 700 °C for 4 h under N2 atmosphere, and obtain the absorbing material based on MXene waste precipitate.
- the material structure is shown in Figure 1.
- Example 2 the wave-absorbing material prepared based on the waste precipitation of MXene in Example 1 was mixed with paraffin wax at a filling amount of 40wt.%, stirred evenly, poured into a mold, and pressed into hollow rings with an inner diameter of 3mm and an outer diameter of 7mm with different thicknesses , using Keysight
- the PNA-E5227B vector network analyzer tests its complex dielectric constant and electromagnetic wave absorption performance.
- Example 2 the wave-absorbing material prepared based on the waste precipitation of MXene in Example 1 was mixed with paraffin wax at a filling amount of 50wt.%, stirred evenly, poured into a mold, and pressed into hollow rings with an inner diameter of 3mm and an outer diameter of 7mm with different thicknesses , using Keysight
- the PNA-E5227B vector network analyzer tests its complex dielectric constant and electromagnetic wave absorption performance.
- the test results are shown in Fig. 4 and Fig. 5, respectively.
- the waste precipitate of MXene has appropriate real and imaginary part values of the complex permittivity.
- the reflection loss can reach -43.8dB.
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Abstract
Description
Claims (10)
- 一种基于MXene废弃沉淀制备的电磁波吸收材料,其特征在于所述电磁波吸收材料是通过以MAX相刻蚀制备MXene后剩余的MXene废弃沉淀为原材料,经过收集,干燥,碳化处理后得到的。
- 如权利要求1所述的一种基于MXene废弃沉淀制备的电磁波吸收材料,其特征在于所述碳化处理为:将干燥后的MXene废弃沉淀置于坩埚中,放入管式炉中在N 2气氛下400-1000 °C碳化1-5 h,得到电磁波吸收材料。
- 如权利要求1所述的基于MXene废弃沉淀制备的电磁波吸收材料的制备方法,其特征在于包括以下步骤:(1)将MAX相加入到刻蚀剂中进行刻蚀处理,得到MXene;(2)反复用去离子水洗涤并离心至中性后,经若干次的震荡和离心后,收集下层沉淀即MXene废弃沉淀;(3)对上述步骤(2)得到的MXene废弃沉淀进行干燥;(4)将上述步骤(3)干燥后的MXene废弃沉淀进行碳化处理,得到电磁波吸收材料。
- 如权利要求3所述的制备方法,其特征在于所述步骤(1)中MAX相包括Ti 3AlC 2、Ti 2AlC、Nb 2AlC中的一种或多种,优选Ti 3AlC 2,所述MXene为手风琴状。
- 如权利要求3所述的制备方法,其特征在于所述步骤(1)中刻蚀剂包括HF或LiF/HCl复合溶剂中的一种,优选刻蚀剂为LiF/HCl复合溶剂。
- 如权利要求3所述的制备方法,其特征在于所述步骤(1)中刻蚀处理的条件为:转速200-400rpm,温度35-50 °C,反应时间24-48 h。
- 如权利要求3所述的制备方法,其特征在于所述步骤(2)中离心的转速均为1500-3500r/min。
- 如权利要求3所述的制备方法,其特征在于所述步骤(3)中干燥包括真空干燥,所述真空干燥的条件为:干燥温度40-70 °C,干燥时间12-48 h。
- 如权利要求3所述的制备方法,其特征在于所述步骤(4)中碳化处理的具体操作为:将干燥后的MXene废弃沉淀置于坩埚中,放入管式炉中在N 2气氛下400-1000 °C碳化1-5 h,得到电磁波吸收材料。
- 如权利要求1或2所述的基于MXene废弃沉淀制备的电磁波吸收材料在作为新型电磁波吸波材料中的应用。
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| CN202111290428.0 | 2021-11-02 | ||
| CN202111290428.0A CN113904126A (zh) | 2021-11-02 | 2021-11-02 | 一种基于MXene废弃沉淀制备的电磁波吸收材料及其制备方法和应用 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116315732A (zh) * | 2023-05-24 | 2023-06-23 | 陕西煤业化工技术研究院有限责任公司 | 一种纳米中空异质双壳结构电磁波吸收材料及制备方法 |
| CN116887594A (zh) * | 2023-09-07 | 2023-10-13 | 北京理工大学 | MXene基磁电耦合型电磁吸波材料及其制备方法和应用 |
| CN116940094A (zh) * | 2023-06-30 | 2023-10-24 | 东南大学 | MXene原位生长CNTs空心球壳复合C-Co骨架吸波材料及制备方法 |
| CN117320428A (zh) * | 2023-10-16 | 2023-12-29 | 青岛理工大学 | 一种结构可控型的超薄电磁吸波材料及其制备方法 |
| CN117641872A (zh) * | 2023-11-27 | 2024-03-01 | 山东省地质科学研究院 | 中空二氧化锰纳米管负载MXene材料及制备方法 |
| CN118175827A (zh) * | 2024-05-16 | 2024-06-11 | 浙江大华技术股份有限公司 | 一种具有优良吸波特性的吸波材料、制备方法及应用 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115216056B (zh) * | 2022-08-16 | 2023-10-03 | 山东大学 | 一种具有仿生孔结构的水凝胶材料及其制备方法和应用 |
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2021
- 2021-11-02 CN CN202111290428.0A patent/CN113904126A/zh active Pending
- 2021-12-14 WO PCT/CN2021/137984 patent/WO2023077620A1/zh not_active Ceased
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| CN110290691A (zh) * | 2019-07-17 | 2019-09-27 | 湖南工程学院 | 一种片层状MXene负载钴铁氧体的复合吸波材料及其制备方法 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116315732A (zh) * | 2023-05-24 | 2023-06-23 | 陕西煤业化工技术研究院有限责任公司 | 一种纳米中空异质双壳结构电磁波吸收材料及制备方法 |
| CN116315732B (zh) * | 2023-05-24 | 2023-09-05 | 陕西煤业化工技术研究院有限责任公司 | 一种纳米中空异质双壳结构电磁波吸收材料及制备方法 |
| CN116940094A (zh) * | 2023-06-30 | 2023-10-24 | 东南大学 | MXene原位生长CNTs空心球壳复合C-Co骨架吸波材料及制备方法 |
| CN116887594A (zh) * | 2023-09-07 | 2023-10-13 | 北京理工大学 | MXene基磁电耦合型电磁吸波材料及其制备方法和应用 |
| CN116887594B (zh) * | 2023-09-07 | 2023-12-19 | 北京理工大学 | MXene基磁电耦合型电磁吸波材料及其制备方法和应用 |
| CN117320428A (zh) * | 2023-10-16 | 2023-12-29 | 青岛理工大学 | 一种结构可控型的超薄电磁吸波材料及其制备方法 |
| CN117320428B (zh) * | 2023-10-16 | 2024-03-19 | 青岛理工大学 | 一种结构可控型的超薄电磁吸波材料的制备方法 |
| CN117641872A (zh) * | 2023-11-27 | 2024-03-01 | 山东省地质科学研究院 | 中空二氧化锰纳米管负载MXene材料及制备方法 |
| CN117641872B (zh) * | 2023-11-27 | 2024-06-11 | 山东省地质科学研究院 | 中空二氧化锰纳米管负载MXene材料及制备方法 |
| CN118175827A (zh) * | 2024-05-16 | 2024-06-11 | 浙江大华技术股份有限公司 | 一种具有优良吸波特性的吸波材料、制备方法及应用 |
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