Wide-frequency-band terahertz wave-absorbing material and preparation method thereof

A wave absorbing material and terahertz technology, applied in the field of terahertz wave absorbing materials, can solve the problems of the decline of terahertz wave absorption performance index, the heavy weight of terahertz wave absorbing materials, and the sluggish high-frequency response of electromagnetic fields, and achieve a good free space. The effect of impedance matching, good absorption performance and fast high frequency response

Active Publication Date: 2021-07-30
南京星起源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the terahertz absorbing material produced by this method has the disadvantages of heavy weight, the arrangement of square pyramids or triangular pyramids makes the surface easy to fall dust, and the short wavelength of terahertz will affect its performance.
In addition, in the high-frequency terahertz stage, the high-frequency response of magnetic powder or metal oxide powder to the electromagnetic field is slow, and its absorption performance index for terahertz waves is seriously reduced, and the effect recorded can not be achieved at all.

Method used

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  • Wide-frequency-band terahertz wave-absorbing material and preparation method thereof
  • Wide-frequency-band terahertz wave-absorbing material and preparation method thereof
  • Wide-frequency-band terahertz wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] according to figure 1 The process flow shown prepares a terahertz absorbing material with a size of 300mm×300mm and a thickness of 0.85mm. The specific process flow is as follows:

[0039] Ingredients: Weigh raw materials by mass parts: 1 part of antioxidant KY-405, 24.2 parts of absorbent (acetylene carbon black), 1 part of stearic acid, 100 parts of polyurethane gum, coupling agent (silane coupling agent A -151) 3 parts, vulcanizing agent (2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane) 3 parts, crosslinking aid (triallyl cyanurate TAC) 2 servings.

[0040] Mastication: Masticate 100 parts of raw polyurethane rubber, make it wrap the front roller, make triangular bags several times, add stearic acid, and masticate for 15 minutes in total.

[0041]Mixing: At room temperature, turn on the cooling water, first adjust the roller distance to (2.5±0.5)mm, and gradually add the absorbent acetylene carbon black to the plasticized polyurethane raw rubber until all the absorben...

Embodiment 2

[0049] according to figure 1 The process flow shown prepares a terahertz absorbing material with a size of 300mm×300mm and a thickness of 1.21mm. The specific process flow is as follows:

[0050] Ingredients: Weigh raw materials by weight: 1 part of antioxidant KY-405, 26.6 parts of absorbent (acetylene carbon black), 1 part of stearic acid, 100 parts of polyurethane gum, coupling agent (silane coupling agent A -151) 3 parts, vulcanizing agent (2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane) 3 parts, crosslinking aid (triallyl cyanurate TAC) 2 servings.

[0051] Mastication: Masticate 100 parts of raw polyurethane rubber, make it wrap the front roller, make triangular bags several times, add stearic acid, and masticate for 15 minutes in total.

[0052] Mixing: At room temperature, turn on the cooling water, first adjust the roller distance to (2.5±0.5)mm, and gradually add the absorbent acetylene carbon black to the plasticized polyurethane raw rubber until all the absorbent a...

Embodiment 3

[0060] according to figure 1 The process flow shown prepares a terahertz absorbing material with a size of 300mm×300mm and a thickness of 0.65mm. The specific process flow is as follows:

[0061] Ingredients: Weigh raw materials by mass parts: 1 part of antioxidant KY-405, 19.4 parts of absorbent (mixing carbon black and graphene at a mass ratio of 1:1), 1 part of stearic acid, 100 parts of polyurethane gum, 3 parts of coupling agent (silane coupling agent A-151), 3 parts of vulcanizing agent (2,5-dimethyl-2,5-bis(tert-butyl peroxide) hexane), 3 parts of crosslinking aid (three Allyl cyanurate (TAC) 2 parts.

[0062] Mastication: Masticate 100 parts of raw polyurethane rubber, make it wrap the front roller, make triangular bags several times, add stearic acid, and masticate for 15 minutes in total.

[0063] Mixing: At room temperature, turn on the cooling water, first adjust the roller distance to (2.5±0.5)mm, and gradually add the absorbent acetylene carbon black to the pla...

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Abstract

The invention discloses a wide-frequency-band terahertz wave-absorbing material and a preparation method thereof, and belongs to the field of terahertz wave-absorbing materials. The wave-absorbing material takes a rubber material as a base material, takes a nanoscale carbon-based absorbent as a terahertz absorbent, and has a rough surface. The terahertz wave-absorbing material is prepared by compounding a rubber material and a nanoscale carbon-based absorbent and performing compression molding by using a mold, so that the terahertz wave-absorbing material has a rough surface. The terahertz wave-absorbing material prepared by the method has the characteristics of being thin in thickness, light in weight and convenient to paste and use, has broadband absorption performance of 0.1-4 THz, has reflectivity of -38.7 dB at 1.45 THz, and has wide application prospects.

Description

technical field [0001] The invention relates to the field of terahertz absorbing materials, in particular to a wide-band terahertz absorbing material and a preparation method thereof. Background technique [0002] Terahertz (THz) waves or terahertz rays were officially named only in the mid-to-late 1980s, before which scientists collectively referred to them as far-infrared rays. Terahertz waves refer to electromagnetic waves with a frequency in the range of 0.1THz to 10THz and a wavelength in the range of 3mm to 0.03mm, which is between microwave and infrared. Terahertz is a new radiation source with many unique advantages. Terahertz technology is a very important cross-cutting frontier field, which provides a very attractive opportunity for technological innovation, national economic development and national security. [0003] The reason why THz technology has attracted widespread attention and has so many applications is that the terahertz spectrum of matter contains ver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K3/04
CPCC08K3/04C08K3/042C08K3/041C08K2201/011C08L75/04
Inventor 顾兆栴樊迪刚刘毅
Owner 南京星起源新材料科技有限公司
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