Preparation method of iron-based composite wave-absorbing material

A composite wave-absorbing material, iron-based technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of undisclosed absorption characteristics of wave-absorbing materials, application limitations, etc., to improve wave-absorbing characteristics, improve absorption The effect of wave performance

Inactive Publication Date: 2021-02-02
杭州鹿扬科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventive method does not disclose the absorption characteristics of the electromagnetic radiation in which frequency band the prepared absorbing material has, and its application is limited.

Method used

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  • Preparation method of iron-based composite wave-absorbing material
  • Preparation method of iron-based composite wave-absorbing material
  • Preparation method of iron-based composite wave-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] Example 1: An iron-based composite absorbing material:

[0080] S101: Under stirring at 180r / min, add 10mL of methyltriethoxysilane to 200mL of 70vol% ethanol solution, then add 25mL of 12% hydrochloric acid, continue stirring for 1h, raise the temperature to 45°C and stir for 24h; then add 3mL of 25% ammonia water, after stirring for 30min, add 0.45g of iron porphyrin, then stir for 30min, let it stand for 1h, and place it at a constant temperature of 45°C to form a gel; after the gel is formed, add 3mL of ethanol / ethyl orthosilicate mixture (volume Ratio 1:4), aging at room temperature for 24 hours, drying at 50°C to constant weight to obtain a porous matrix material doped with iron porphyrin, material thickness 2mm;

[0081] S102: Dissolve 10g of urea and 3g of zinc acetate in 200mL of ultrapure water, then add 30g of ethylenediamine, stir at 300r / min at room temperature, heat at 185°C for 8h, and cool down to room temperature naturally to obtain a brown solution, fi...

Embodiment 2

[0085] Example 2: Another iron-based composite absorbing material:

[0086] S101: Stirring at 180r / min, add 10mL of methyltriethoxysilane to 300mL of 70vol% ethanol solution, then add 20mL of 15% hydrochloric acid, continue stirring for 1h, raise the temperature to 45°C and stir for 24h; then add 5mL of 22% ammonia water, after stirring for 30min, add 0.6g of iron porphyrin, then stir for 30min, let it stand for 1h, and place it at a constant temperature of 45°C to form a gel; after the gel is formed, add 3mL of ethanol / ethyl orthosilicate mixture (volume Ratio 1:4), aging at room temperature for 24 hours, drying to constant weight at 50°C to obtain a porous matrix material doped with iron porphyrin, with a thickness of 2mm;

[0087] S102: Dissolve 10g of urea and 2.5g of zinc acetate in 200mL of ultrapure water, then add 25g of ethylenediamine, stir at 300r / min at room temperature, heat at 185°C for 8h, and naturally cool to room temperature to obtain a brown solution with a ...

Embodiment 3

[0091] Example 3: Another iron-based composite absorbing material:

[0092] S101: Under stirring at 300r / min, add 10mL of methyltriethoxysilane to 300mL of 70vol% ethanol solution, then add 25mL of 20% hydrochloric acid, continue stirring for 1h, raise the temperature to 50°C and stir for 24h; then add 4mL of 20% ammonia water, after stirring for 30min, add 0.5g iron porphyrin, then stir for 30min, let it stand for 1h, and place it at a constant temperature of 45°C to form a gel; after the gel is formed, add 4mL ethanol / ethyl orthosilicate mixed solution (volume Ratio 1:4), aging at room temperature for 24 hours, drying at 45°C to constant weight to obtain a porous matrix material doped with iron porphyrin, material thickness 2mm;

[0093] S102: Dissolve 12g of urea and 4g of zinc acetate in 400mL of ultrapure water, then add 35g of ethylenediamine, stir at 600r / min at room temperature, heat at 190°C for 6h, and cool to room temperature naturally to obtain a brown solution, wh...

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Abstract

The invention relates to the technical field of electromagnetic wave absorbing materials, in particular to a preparation method of an iron-based composite wave-absorbing material. The reparation method comprises the following steps: S101: preparing a porous matrix material doped with ferriporphyrin; s102, preparing a mixed solution containing zinc-doped carbon quantum dots and magnetized zero-valent iron; s103, enabling the mixed solution to be fully infiltrated into the porous matrix material; s104, enabling the mixed solution to be subjected to electrophoresis in the porous matrix material through an electrophoresis device; and S105, drying the porous matrix material to obtain the iron-based composite wave-absorbing material. The zinc-doped carbon quantum dots and the magnetized zero-valent iron are compounded into the porous matrix material doped with ferriporphyrin, concentration gradient distribution of synergistic components is achieved through electrophoresis, the iron-based composite wave-absorbing material is prepared, and the material has various complex interfaces and concentration gradients so that the material has excellent wave-absorbing performance.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorbing materials, in particular to a preparation method of an iron-based composite wave absorbing material. Background technique [0002] The mechanism of electromagnetic radiation harming the human body mainly includes the following three parts: Thermal effect, which means that the human body is a kind of conductor. When the human body is exposed to radio current and microwave radiation, it will generate electric current and generate heat. Usually the strongest electromagnetic radiation source in the environment, infrared and visible light can cause heating on the surface of the human body; non-thermal effect, there are weak electromagnetic fields in human organs and tissues, usually they are stable and orderly, and certain frequency electromagnetic waves outside The interference of the electromagnetic field may break the balance of the electromagnetic field and have adverse effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 不公告发明人
Owner 杭州鹿扬科技有限公司
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