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A kind of zno/co composite nano hollow fiber electromagnetic wave absorbing material and preparation method thereof

A technology for absorbing materials and hollow fibers, which is applied in the fields of fiber chemical characteristics, chemical instruments and methods, and other chemical processes, and can solve problems such as inability to use materials for large-scale and industrialized preparation, unfavorable practical application and industrial production, and high price , to achieve excellent electromagnetic wave absorption performance, excellent impedance matching performance, and low production cost

Active Publication Date: 2020-04-14
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In addition, most of the existing methods for preparing electromagnetic wave absorbing materials are hydrothermal or solvothermal methods. For experimental research, this method is easy to operate, but it cannot be used for large-scale and industrial preparation of materials, so it is not conducive to practical application and industrial production
In addition, methods such as liquid phase exchange are expensive and cumbersome to operate, and are only suitable for laboratory research

Method used

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  • A kind of zno/co composite nano hollow fiber electromagnetic wave absorbing material and preparation method thereof
  • A kind of zno/co composite nano hollow fiber electromagnetic wave absorbing material and preparation method thereof
  • A kind of zno/co composite nano hollow fiber electromagnetic wave absorbing material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A preparation method of ZnO / Co composite nano hollow fiber electromagnetic wave absorbing material, comprising the steps of:

[0061] (1) Dissolve 1 mmol of cobalt acetylacetonate and 1 mmol of zinc acetate dihydrate in 10 ml of DMF, add 1.5 g of PVP after fully dissolving, react at 600°C for 3 hours after stirring, and obtain a uniform viscous solution;

[0062] (2) Under the condition of 12kV high-voltage static electricity, the viscous solution in step (1) is spun by a high-voltage electrospinning process to obtain organic fibers, and then the organic fibers are dried at 50°C for 20h, and then pre-oxidized at 200°C After 3 hours of treatment, place in an air atmosphere muffle furnace and calcinate at 600°C for 3 hours;

[0063] (3) Put the product calcined in step (2) in a closed tube furnace, and carry out reduction treatment at 400° C. for 1 hour in a hydrogen atmosphere to obtain a ZnO / Co composite nano hollow fiber electromagnetic wave absorbing material.

Embodiment 2

[0067] With embodiment 1, difference is: in step (1), with cobalt nitrate (Co(NO 3 ) 2 9H 2 O) instead of cobalt (II) acetylacetonate (C 10 h 14 o 4 Co). In step (2), the drying time and temperature are: 30° C., 24 hours; the time and temperature of pre-oxidation treatment are: 300° C. pre-oxidation treatment for 1 hour.

Embodiment 3

[0069] With embodiment 1, difference is: in step (1), the addition amount of described PVP is 1.0g. In step (2), the drying time and temperature are: 80° C. for 12 hours; the time and temperature for pre-oxidation treatment are: 150° C. for 4 hours.

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Abstract

The invention relates to a ZnO / Co composite nano hollow fiber electromagnetic wave absorption material and a preparation method thereof and relates to the technical field of electromagnetic wave absorption materials. The method comprises the following steps: (1) dissolving a cobalt source and a zinc source in DMF, continuously adding PVP, stirring and then reacting to obtain a uniform viscous solution; (2) spinning the viscous solution in the step (1) by using a high-voltage electrostatic spinning method to obtain organic nanofibers, drying and pre-oxidizing the organic fibers, and then calcining the organic fibers; and (3) placing the organic fibers calcined in the step (2) in reducing atmosphere and carrying out reduction treatment to obtain the ZnO / Co composite nano hollow fiber material. The ZnO / Co composite nano hollow fiber material prepared through combination of the high-voltage electrostatic spinning method, calcining and reducing is high in saturation magnetic susceptibility,strong in coercive force, light in weight, high in oxidation resistance and excellent in electromagnetic wave absorption property; meanwhile, the preparation method is simple and feasible, and is lowin cost.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave absorbing materials, in particular to a ZnO / Co composite nano hollow fiber electromagnetic wave absorbing material and a preparation method thereof. Background technique [0002] In recent years, the rapid development of remote sensing detection technology, computer technology, and electronic communication technology has inevitably brought about problems such as electromagnetic interference and electromagnetic radiation. At the same time, the increasing electromagnetic energy density causes electromagnetic pollution and damages human health. . In addition, electromagnetic wave absorbing materials also have important applications in the field of military technology. Therefore, electromagnetic wave absorbing materials have received more and more attention, especially for the absorption of electromagnetic waves in the GHz frequency range, which is a hot research topic. Considering the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/00D01F9/10
CPCC09K3/00D01F9/10
Inventor 刘久荣乔靖刘伟吴莉莉汪宙王凤龙陈国文
Owner SHANDONG UNIV
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