Microwave absorbent based on synergistic coupling protection and preparation method thereof

A microwave absorbent and solvent technology, which is used in textiles and papermaking, fiber processing, fiber chemical characteristics, etc., can solve problems such as large specific gravity, and achieve the effects of low cost, improved load uniformity, and a wide range of sources.

Pending Publication Date: 2021-07-20
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite materials currently studied are mainly powder composites, which still have the disadvantage of large specificity.

Method used

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  • Microwave absorbent based on synergistic coupling protection and preparation method thereof
  • Microwave absorbent based on synergistic coupling protection and preparation method thereof
  • Microwave absorbent based on synergistic coupling protection and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A microwave absorber based on cooperative coupling protection, the microwave absorber uses ferrite fiber as a carrier and supports ferrite and barium titanate composite fibers made of barium titanate nanoparticles.

[0026] A method for preparing a microwave absorber based on cooperative coupling protection, comprising the steps of:

[0027] S1 Prepare the spinning solution, add 2.91g of cobalt nitrate and 8.08g of iron nitrate into 50mL deionized water, stir for 30 minutes to obtain solution A; weigh 1g of polyvinylpyrrolidone and add it to 9ml of ethanol, stir for 3 hours to obtain Solution B; adding solution B to solution A and stirring for 5 hours to obtain a spinning solution;

[0028] S2 Preparation of ferrite fibers, using sol electrospinning process, under the conditions of 15kV voltage, receiving distance 15cm, needle diameter 0.9mm, liquid output rate 1mL / h to prepare precursor fibers, calcined at 550°C for 2h to obtain ferrite fiber, its XRD and SEM images a...

Embodiment 2

[0032] A microwave absorber based on cooperative coupling protection, the microwave absorber uses ferrite fiber as a carrier and supports ferrite and barium titanate composite fibers made of barium titanate nanoparticles.

[0033] A method for preparing a microwave absorber based on cooperative coupling protection, comprising the steps of:

[0034] S1 Prepare the spinning solution, add 2.91g of cobalt nitrate and 8.08g of iron nitrate into 50mL deionized water, stir for 30 minutes to obtain solution A; weigh 1g of polyvinylpyrrolidone and add it to 9ml of ethanol, stir for 3 hours to obtain Solution B; adding solution B to solution A and stirring for 3 hours to obtain a spinning solution;

[0035] S2 Preparation of ferrite fibers, using sol electrospinning process, under the conditions of 15kV voltage, receiving distance 15cm, needle diameter 0.9mm, liquid output rate 1mL / h to prepare precursor fibers, calcined at 550°C for 2h to obtain ferrite fiber;

[0036] S3 Prepare abs...

Embodiment 3

[0039] A microwave absorber based on cooperative coupling protection, the microwave absorber uses ferrite fiber as a carrier and supports ferrite and barium titanate composite fibers made of barium titanate nanoparticles.

[0040] A method for preparing a microwave absorber based on cooperative coupling protection, comprising the steps of:

[0041] S1 prepares spinning solution, gets the nickel nitrate of 2.91g and the ferric nitrate of 8.08g and joins in 50mL deionized water, stirs for 30 minutes to obtain solution A; Takes the polyvinylpyrrolidone of 1.25g and joins in the ethanol of 10.2ml, stirs for 3 Obtain solution B in 1 hour; Add B solution in A solution, stir for 5 hours, obtain spinning solution;

[0042] S2 prepares ferrite fiber, adopts sol electrospinning process, prepares precursor fiber under the conditions of 20kV voltage, receiving distance 15cm, needle diameter 0.4mm, liquid output rate 1mL / h, and calcines at 650°C for 5h to obtain ferrite fiber;

[0043] S...

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Abstract

The invention relates to a microwave absorbent based on synergistic coupling protection and a preparation method thereof. The preparation method takes ferrite fiber as a carrier to load barium titanate nanoparticles and comprises the following specific preparation steps that metal salt and polyvinylpyrrolidone are dissolved in an ethanol solution, and the ferrite fibers are prepared through a sol electrospinning charge high-temperature calcination technology; and soluble barium salt and tetrabutyl titanate are added into an organic solvent, a surfactant is added, and solvothermal reaction is conducted at 150-180 DEG C to obtain the ferrite and barium titanate composite fiber material. The preparation method has the characteristics of wide raw material source, low cost and excellent performance, the preparation technology is simple and easy to control, and industrial production is easy to realize.

Description

technical field [0001] The invention relates to the field of preparation of inorganic nanomaterials, in particular to a microwave absorber based on cooperative coupling protection and a preparation method thereof. Background technique [0002] The rapid development of wireless communication and electronic technology has promoted the widespread application of electronic equipment in military and civilian fields, and the harm caused by electromagnetic radiation and electromagnetic interference has attracted increasing attention from the society. In order to solve this problem, the attenuation and absorption of electromagnetic waves through microwave absorbing materials is the most ideal method, which has received extensive attention. Microwave absorption is the absorption and attenuation of incident energy through energy conversion and multiple scattering. In order to improve the electromagnetic wave absorption performance of the absorber, two key factors must be considered. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/46D01F9/10
CPCD01F9/10D06M11/46
Inventor 孟献丰姜欣孔庆丰
Owner JIANGSU UNIV
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