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Ferrite/ polyaniline composite material and preparation method thereof

A technology of composite materials and ferrite, which is applied in the field of microwave-absorbing materials, can solve problems such as limitations, and achieve the effects of improving microwave-absorbing efficiency, broadening the absorption frequency band, and improving the absorption effect

Active Publication Date: 2015-09-02
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After analysis, it can be inferred that the coating of polyaniline produces electromagnetic shielding effect, thus limiting the performance of ferrite absorbing effect

Method used

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  • Ferrite/ polyaniline composite material and preparation method thereof
  • Ferrite/ polyaniline composite material and preparation method thereof
  • Ferrite/ polyaniline composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation process of the ferrite / polyaniline composite material in this embodiment is (the parts are all parts by mass):

[0032] (1) Put Li-Zn ferrite (average particle size 1 μm, purchased from Aladdin Reagent) in water and fully stir it, then take it out and dry it at low temperature for later use;

[0033] (2) Dissolve 0.1 part of anilinomethyltriethoxysilane in 100 parts of absolute alcohol, stir fully for later use; put the Li-Zn ferrite treated in step (1) into the above solution, stir for 1 Take out and dry in minutes;

[0034] (3) Dissolve 0.01 part of aniline in 100 parts of carbon tetrachloride and stir evenly to form a solution; 0.01 part of ammonium persulfate, 1 part of concentrated hydrochloric acid (37%) and 1 part of Li-Zn after treatment in step (2) Add ferrite to 100 parts of water, mix well to form solution B; slowly add solution B to solution A to form an interface between organic phase and water phase, let it stand at room temperature for 0....

Embodiment 2

[0036] The preparation process of the ferrite / polyaniline composite material in this embodiment is (the parts are all parts by mass):

[0037] (1) This step is with embodiment 1;

[0038] (2) Dissolve 50 parts of anilinomethyltriethoxysilane in 100 parts of acetone, stir fully for later use; put the Li-Zn ferrite treated in step (1) into the above solution, stir for 1 minute and take out drying;

[0039] (3) Dissolve 30 parts of aniline in 100 parts of dichloromethane and stir evenly to form a solution; 10 parts of ammonium persulfate, 20 parts of concentrated hydrochloric acid (37%) and 1 part of Li-Zn iron after treatment in step (2) The oxygen body was added to 100 parts of water, and mixed evenly to form a solution B; the solution B was slowly added to the solution A to form an interface between the organic phase and the water phase, and stood at room temperature for 0.5 hours, and the product was taken out, washed and dried.

Embodiment 3

[0041] The preparation process of the ferrite / polyaniline composite material in this embodiment is (the parts are all parts by mass):

[0042] (1) This step is with embodiment 1;

[0043] (2) Dissolve 1 part of anilinomethyltriethoxysilane in 100 parts of acetone, stir fully for later use; put the Li-Zn ferrite treated in step (1) into the above solution, stir for 5 minutes and take out drying;

[0044] (3) Dissolve 5 parts of aniline in 100 parts of carbon tetrachloride and stir evenly to form a solution; 5 parts of ammonium persulfate, 5 parts of concentrated hydrochloric acid (37%) and 1 part of Li-Zn after treatment in step (2) Add ferrite to 100 parts of water, mix well to form solution B; slowly add solution B to solution A to form an interface between organic phase and water phase, let it stand at room temperature for 0.5 hours, take out the product, wash and dry it.

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Abstract

The invention relates to a ferrite / polyaniline composite material. The composite material is that ferrite is used as the core; linear polyaniline is in a shape of outwards radioactive rays using the core as the center, so as to form a sea urchin like structure. A preparation method of the material comprises the steps of 1) pre-treating ferrite to enable the surface to be rich in hydroxyl; 2) performing coupling treatment to graft benzene ring containing organosilane onto the surface of ferrite; 3) performing polymerization reaction of linear polyaniline by using phenylamino group introduced to benzene ring as a starting point. According to the preparation method, the obtained linear polyaniline can modify the sea urchin like structure of ferrite; the wave absorbing effects of ferrite and polyaniline can be brought into full play; therefore, the absorbing frequency band can be further expanded; in addition, the linear polyaniline structure can further improve the electromagnetic wave absorbing effect of the composite material, and thus the coordination effect of the linear polyaniline and ferrite can be brought into full play.

Description

technical field [0001] The invention belongs to the field of wave-absorbing materials, and in particular relates to a ferrite / polymer composite wave-absorbing material and a preparation method thereof. Background technique [0002] Electromagnetic radiation has become the fourth largest environmental pollution after water pollution, air pollution and noise pollution. Serious electromagnetic pollution will not only interfere with the normal operation of electronic equipment and instruments, but also long-term high-frequency electromagnetic radiation will also damage the human nervous system. , cardiovascular system, immune system, and endocrine system. In this context, the development of absorbing materials is becoming more and more important. [0003] Combining polyaniline and ferrite, two materials with wave-absorbing functions, can not only improve the wave-absorbing performance, broaden the absorption frequency band, and reduce the weight, but also has the following two ...

Claims

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Application Information

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IPC IPC(8): C08G73/02C08L79/02C09K3/00
Inventor 周金堂姚正军李琳魏东博李淑琴
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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