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A kind of composite absorbing material and preparation method thereof

A composite wave-absorbing material and wave-absorbing material technology, applied in the field of chemical materials, can solve problems such as low density, and achieve the effects of light density, low equipment requirements, and low energy consumption

Inactive Publication Date: 2015-08-26
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects of the existing wave-absorbing materials, the present invention has developed a composite wave-absorbing material with a new composition and its preparation method, so as to realize the purpose of enhancing the wave-absorbing performance of the wave-absorbing material and having a smaller density than the existing wave-absorbing material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The nano-iron tetroxide particles and nano-cellulose used below are all based on the finished products purchased directly. The nano-ferric oxide was purchased from Jiangsu Haina Nano Technology Development Co., Ltd.; the nano-cellulose was purchased from China International Travel Service Co., Ltd. Trading LLC.

[0022] The ionic liquids used in the following experiments were prepared using the self-made ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl), which was also prepared by known techniques, which were prepared by the following methods, respectively Take 500mL N-methylimidazole (purchased from Wuhan Yihuacheng Pharmaceutical Chemical Co., Ltd.) and 800mL n-chlorobutane (purchased from Yancheng Longsheng Chemical Co., Ltd.), add the two into a 2000mL flask and mix, mix The solution was heated to reflux in an oil bath at 110°C, and electromagnetic stirring was applied at the same time. With the continuation of the reaction time, the color o...

Embodiment 2

[0038] Embodiment 2: A composite wave-absorbing material with a new composition developed by the present invention includes main ingredients and auxiliary agents. The main ingredients include nano-ferric oxide particles and nanocellulose, and the auxiliary agents include oleic acid and potassium persulfate. And the mass percentage of the main material in the wave-absorbing material is 85%, and the mass percentage of the auxiliary agent in the wave-absorbing material is 4%.

[0039] The mass percentages of each component in the main ingredient in the wave-absorbing material are respectively 30% for nanometer iron ferric oxide particles and 55% for nanocellulose.

[0040] The mass percentages of each component in the auxiliaries in the wave-absorbing material are 1% for oleic acid and 3% for potassium persulfate.

[0041] The method for preparing the wave-absorbing material of the present invention includes the following steps: (1) Weighing nanocellulose, which has a mass percen...

Embodiment 3

[0053] Embodiment 3: A composite wave-absorbing material with a new composition developed by the present invention includes main ingredients and auxiliary agents. The main ingredients include nano-ferric oxide particles and nanocellulose, and the auxiliary agents include oleic acid and potassium persulfate. And the mass percentage of the main material in the wave-absorbing material is 85%, and the mass percentage of the auxiliary agent in the wave-absorbing material is 11%.

[0054] The mass percentages of each component in the main ingredient in the wave-absorbing material are respectively 10% of the nano-iron ferric oxide particles and 75% of the nano-cellulose.

[0055] The mass percentages of each component in the auxiliaries in the wave-absorbing material are 1% for oleic acid and 10% for potassium persulfate.

[0056] The method for preparing the wave-absorbing material of the present invention comprises the following steps: (1) Weighing nanocellulose, whose mass percent...

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Abstract

The invention discloses a composite wave-absorbing material, comprising main materials and auxiliary agents, wherein the main materials include a nanometer ferriferrous oxide particle and nanometer cellulose, the auxiliary agents include oleic acid and potassium persulphate, the mass percentage of the main materials in the wave-absorbing material is 60 to 85%, and the mass percentage of the auxiliary agents in the wave-absorbing material is 4 to 15%. A preparation method for the composite wave-absorbing material comprises the following steps: (1) preparing a nanometer cellulose solution; (2) adding potassium persulphate for a reaction; (3) adding oleic acid-coated nanometer ferriferrous oxide into a uniformly mixed solution obtained in the previous step; (4) allowing a mixed liquor obtained in the previous step to undergo a reaction at a temperature of 60 DEG C for 6 h, cooling to room temperature after completion of the reaction and transferring the reacted mixed liquor to a centrifuge tube for centrifugation; (5) adding purified water into a supernatant obtained in the previous step and carrying out centrifugation again; and (6) adding purified water into a precipitate obtained in the previous step, carrying out full mixing with stirring, carrying out centrifugation again and drying and grinding a precipitate obtained after centrifugation. Compared with a conventional wave-absorbing material, the wave-absorbing material provided by the invention has the advantages of low density, a wide absorption frequency band and enhanced wave-absorbing performance.

Description

technical field [0001] The invention belongs to the technical field of chemical materials, in particular to a composite wave-absorbing material and a preparation method thereof. Background technique [0002] The absorbing material is composed of two parts: the absorber and the matrix material. It is a kind of material that can absorb and attenuate the incident electromagnetic wave, and convert the electromagnetic energy into other forms of energy, such as mechanical energy, electrical energy and thermal energy, so as to consume the electromagnetic energy. A class of functional materials. A wave-absorbing material with excellent performance should meet two requirements at the same time: one is to allow the incident electromagnetic wave to enter the material to the maximum extent, and has wave impedance matching characteristics, even if the reflection coefficient of the incident electromagnetic wave on the surface of the material medium is the smallest; the other is to make th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08K9/10C08K3/22C08K3/30
Inventor 王飞
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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