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Wave-absorbing gradient material based on additive manufacturing technology and preparation method thereof

A gradient material, additive manufacturing technology, applied in additive processing, magnetic field/electric field shielding, electrical components, etc., can solve the problems of poor impedance matching between absorbing materials and free space, poor free space impedance matching, narrow absorption frequency band, etc. , to achieve the effect of acid and alkali resistance and oxidation resistance enhancement, enhanced absorption effect, and high absorption strength.

Active Publication Date: 2018-11-30
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has similarities with the present invention in the preparation method of the absorbing material, but it is a homogeneous absorbing material, and the impedance matching with free space is poor
[0005] In summary, the absorbing materials prepared by the existing methods still have problems such as narrow absorption frequency band, high density, and poor impedance matching between the prepared absorbing materials and free space. Therefore, it is necessary to study a new absorbing material and its its preparation method

Method used

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  • Wave-absorbing gradient material based on additive manufacturing technology and preparation method thereof
  • Wave-absorbing gradient material based on additive manufacturing technology and preparation method thereof
  • Wave-absorbing gradient material based on additive manufacturing technology and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0053] A preparation method of a wave-absorbing gradient material based on additive manufacturing technology, comprising the steps of:

[0054] (1) Place the polycrystalline iron and zinc oxide in a blast drying oven at 80° C. for 6 hours, and the particle size of the nano-absorbent is 1-100 nm;

[0055] (2) Dry nylon 12 at 40°C for 8 hours in a blast drying oven;

[0056] (3) 10% of the nano-absorbent in the step (1) and 90% of the polymer in the step (2) were mixed in a high-speed mixer for 5 minutes to obtain a compound;

[0057] (4) Mixing and plasticizing the mixture in step (3) through a twin-screw extruder at 80° C. for 2 hours at a screw speed of 30 rpm / min, and cooling the plasticized material;

[0058] (5) crushing the plasticized material in step (4) into particles of 1-10 mm, adding the crushed material into a single-screw wire extruder at a screw speed of 10 Hz, and preparing a wire with a diameter of 1 mm;

[0059] (6) Use Dufen G30353D printer to perform fusio...

Embodiment 2

[0061] A preparation method of a wave-absorbing gradient material based on additive manufacturing technology, comprising the steps of:

[0062] (1) Dry carbonyl iron and tin oxide in a blast drying oven at 100°C for 9 hours, and the particle size of the nano-absorbent is 1-100nm;

[0063] (2) Dry the acrylonitrile-butadiene-styrene in a blast drying oven at 60°C for 16 hours;

[0064] (3) 50% of the nano-absorbent in the step (1) and 50% of the polymer in the step (2) were mixed in a high-speed mixer for 5 minutes to obtain a compound;

[0065] (4) Mixing and plasticizing the mixture in step (3) through a twin-screw extruder at 200° C. for 18 hours at a screw speed of 60 rpm / min, and cooling the plasticized material;

[0066] (5) crushing the plasticized material in step (4) into particles of 1-10 mm, adding the crushed material into a single-screw wire extruder at a screw speed of 30 Hz, and preparing a wire with a diameter of 2 mm;

[0067] (6) Use Dufen G3035 3D printer t...

Embodiment 3

[0069] A preparation method of a wave-absorbing gradient material based on additive manufacturing technology, comprising the steps of:

[0070] (1) Dry iron nitride and manganese oxide in a blast drying oven at 120°C for 12 hours, and the particle size of the nano-absorbent is 1-100nm;

[0071] (2) Dry the polyether ether ketone in a blast drying oven at 70°C for 24 hours;

[0072] (3) 40% of the nano-absorbent in the step (1) and 60% of the polymer in the step (2) were mixed in a high-speed mixer for 10 minutes to obtain a compound;

[0073] (4) Mixing and plasticizing the mixture in step (3) through a twin-screw extruder at 150° C. for 8 hours at a screw speed of 100 rpm / min, and cooling the plasticized material;

[0074] (5) crushing the plasticized material in step (4) into particles of 1-10 mm, adding the crushed material into a single-screw wire extruder at a screw speed of 50 Hz, and preparing a wire with a diameter of 3 mm;

[0075] (6) Use Dufen G3035 3D printer to ...

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Abstract

The invention relates to a wave-absorbing gradient material based on additive manufacturing technology and a preparation method thereof, and belongs to the field of wave-absorbing coating materials. The wave-absorbing gradient material is a layered stacking structure, and the wave-absorbing gradient material is a cross-network structure in each layer stacking structure. Magnetic permeability and dielectric constant of the layered stacking structure are gradually decreased at the thickness direction, and the last layer contacting with the air has the minimum magnetic permeability and dielectricconstant. The wave-absorbing gradient material comprises a nanometer absorbent and a polymer, and the nanometer absorbent is uniformly dispersed inside the polymer. Through cross-network structure design on the wave-absorbing gradient material and impedance-matching principle, and selecting materials with gradient reduction electromagnetic parameters, the proportion of electromagnetic waves incident into the wave-absorbing gradient material is greatly improved, and the absorption effect of the wave-absorbing material to electromagnetic waves is enhanced. At the same time, the wave-absorbing gradient material has the characteristics of high absorption intensity, light weight and environmental protection, and the preparation method is simple in technology and convenient to operate.

Description

technical field [0001] The invention relates to the field of wave-absorbing coating materials, in particular to a wave-absorbing gradient material prepared based on additive manufacturing technology and a preparation method thereof. Background technique [0002] With the development of science and technology, electromagnetic waves are increasingly widely used in people's life and production. People listen to radio programs through electromagnetic waves, and complete data transmission on mobile phones, tablet computers and other mobile terminals through electromagnetic waves. The energy output of high-power high-frequency equipment is very strong, which will cause serious interference to nearby electronic equipment and precision instruments. Electromagnetic pulses generated by digital electrical appliances such as laptops and mobile phones may be coupled to the aircraft's electrical equipment through the cables on the aircraft. On sensitive equipment, it threatens flight safe...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L55/02C08L61/16C08L79/08C08K3/08C08K3/22C08K3/18C08K3/28H05K9/00B33Y70/00
CPCB33Y70/00C08K3/08C08K3/18C08K3/22C08K3/28C08K2003/0856C08K2003/2231C08K2003/2244C08K2003/2262C08K2003/2296H05K9/0083C08L77/02C08L55/02C08L61/16
Inventor 刘久荣吕龙飞刘伟吴莉莉王凤龙汪宙
Owner SHANDONG UNIV
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