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Frequency-adjustable intelligent wave-absorbing metamaterial and preparation method thereof

A metamaterial and adjustable technology, applied in chemical instruments and methods, flat products, other chemical processes, etc., can solve problems such as limiting the use range of microwave-absorbing metamaterials, and achieve improved corrosion problems, durability, and microwave-absorbing performance excellent effect

Active Publication Date: 2021-01-29
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since its working frequency is related to the size of its structural unit, once the wave-absorbing metamaterial is prepared, its working frequency cannot be changed, which greatly limits the scope of use of the wave-absorbing metamaterial.

Method used

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  • Frequency-adjustable intelligent wave-absorbing metamaterial and preparation method thereof
  • Frequency-adjustable intelligent wave-absorbing metamaterial and preparation method thereof
  • Frequency-adjustable intelligent wave-absorbing metamaterial and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] In the present invention, the preparation method of the intelligent wave-absorbing metamaterial with adjustable frequency includes the following steps:

[0035](1) Construct the designed metamaterial pattern on the surface of the silicon plate by photolithography to obtain the metamaterial structural silicon plate;

[0036] (2) Carrying out surface fluorosilane modification (surface treatment) to the surface of the metamaterial structure silicon plate obtained in step (1), to obtain a metamaterial structure silicon plate after fluorosilane modification;

[0037] (3) resin matrix, toughening agent and curing agent are mixed uniformly, obtain SMP (shape memory) resin matrix prepolymer; Described resin matrix is ​​selected from epoxy resin, polyurethane resin, polystyrene resin and polynorbornene One or more of the resins; in the present invention, the SMP resin matrix refers to the shape memory resin matrix, and the SMP resin matrix prepolymer refers to the shape memory r...

Embodiment 1

[0061] ①Use the designed metamaterial pattern to construct the metamaterial unit on the surface of the silicon plate by photolithography to obtain the metamaterial structure silicon plate. The designed metamaterial structural unit is a split resonant ring, and the specific parameters of the resonant ring are: the inner diameter of the split ring is 1.5 mm, the outer diameter is 2.0 mm, the thickness is 0.5 mm, and the opening distance is 1.0 mm.

[0062] ②The surface of the prepared silicon plate with metamaterial structure is modified with fluorosilane: the silicon plate with metamaterial structure is firstly placed in H 2 SO 4 (98%) and H 2 o 2 (30%) in a mixed solution with a mixing volume of V / V=3:1, wash at 80°C for 1h, rinse the surface with deionized water, and dry it with nitrogen gas for later use; bombard the surface of the cleaned silicon plate with oxygen plasma for 5min Finally, fluorosilane was deposited on the silicon surface (the surface of the metamaterial ...

Embodiment 2

[0071] Embodiment 2 is basically the same as Embodiment 1, the difference is:

[0072] In step ③, according to the mass ratio of 1:0.33, respectively weigh the corresponding mass of epoxy resin (E-51) and n-octylamine, put them into an oven and heat to 80°C, and keep at constant temperature for 20min. Then epoxy resin is mixed with n-octylamine, after stirring evenly, m-xylylenediamine is added, and the mass ratio of m-xylylenediamine and epoxy resin is 0.01:1, and it is stirred evenly again to obtain SMP epoxy resin prepolymer .

[0073] The same method as in Example 1 was used to test the performance of the frequency-adjustable smart absorbing metamaterial prepared in this example, and the measured reflectivity at 10.21 GHz is shown in Table 1.

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Abstract

The invention relates to a frequency-adjustable intelligent wave-absorbing metamaterial and a preparation method thereof. The method comprises the following steps: constructing a metamaterial structure unit on the surface of a silicon plate; carrying out surface fluoroalkyl silane modification on the surface of the silicon plate; uniformly mixing a resin matrix, a toughening agent and a curing agent to obtain an SMP resin matrix prepolymer; pouring the resin matrix prepolymer on the surface of the silicon plate subjected to fluoroalkyl silane modification, and carrying out curing at differenttemperature stages; then carrying out demolding to obtain an SMP resin matrix with a metamaterial structure; placing a pre-cured flat SMP resin matrix on the surface of the SMP resin matrix, and thencarrying out curing and packaging; and injecting liquid metal into a micro-cavity of the SMP resin matrix, carrying out packaging and plugging by using the SMP resin matrix, and carrying out curing toobtain the intelligent wave-absorbing metamaterial. The material prepared by the invention has a shape memory function, the shape of the material can change by sensing the temperature of the externalenvironment, and the micro-fluid metamaterial structure unit correspondingly changes, so that the response frequency of the wave-absorbing metamaterial is changed.

Description

technical field [0001] The invention belongs to the technical field of preparation of intelligent wave-absorbing materials, in particular to a frequency-adjustable intelligent wave-absorbing metamaterial and a preparation method thereof. Background technique [0002] Absorbing materials refer to a class of materials that can absorb and attenuate incident electromagnetic waves, convert their electromagnetic energy into heat energy and dissipate them, or make electromagnetic waves disappear due to interference. With the development of science and technology, absorbing materials have been widely used in various aspects. Fields such as electromagnetic protection, microwave anechoic chamber, mobile communication and military stealth are of great significance. [0003] With the continuous development of material science, the concept of metamaterials has entered the field of vision of researchers. Unlike traditional materials, the properties of metamaterials are determined by thei...

Claims

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Application Information

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IPC IPC(8): B29D7/00H01Q15/00H01Q17/00C09K3/00C08K5/17
CPCB29D7/00H01Q15/0086H01Q17/00C09K3/00C08K5/17C08L2201/12C08L63/00
Inventor 吕通赵宏杰宫元勋谷浩宇刘宇艳
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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