Medium-adjustable wave-absorbing metamaterial based on microfluidic technology and performance regulation and control device thereof

A microfluidic technology and control device technology, which is applied in laboratory containers, laboratory utensils, chemical instruments and methods, etc., can solve the problem of unpublished absorbing metamaterials and performance control devices, and it is difficult to achieve accurate absorbing performance. , real-time regulation, inability to regulate the absorbing properties of metamaterials, etc., to achieve the effect of strong designability, reducing the overall thickness, and efficient absorbing properties

Active Publication Date: 2022-02-18
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After inquiry, the existing technologies that are highly related to microfluidic technology and adjustable wave-absorbing metamaterials are as follows: First, the mechanically adjustable water-filling method that realizes the regulation of the wave-absorbing properties of metamaterials is mechanically adjustable. Tunable electromagnetic absorbing metamaterials; second, dielectric-based broadband tunable metamaterial absorbers that adjust the dielectric constant by changing the water content in the sand. This control method is not easy to achieve accurate and real-time control of absorbing performance; third, The frequency-adjustable intelligent absorbing metamaterial and its preparation method that change the shape and absorbing performance of microfluidic metamaterial structural units by sensing the shape change of the external environment temperature belong to the thermal control or temperature control mechanism; fourth, based on PDMS The microfluidic metamaterial structure of encapsulation technology is designed to facilitate the encapsulation of the metamaterial structure, but the absorbing performance of the metamaterial cannot be adjusted; fifth, the tunable optically transparent broadband metamaterial absorber based on the water layer is characterized in that Adjustment of absorbing performance by layer thickness
[0005] At present, there are no microwave-absorbing metamaterials and performance control devices that use microfluidic technology to realize adjustable liquid media

Method used

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  • Medium-adjustable wave-absorbing metamaterial based on microfluidic technology and performance regulation and control device thereof
  • Medium-adjustable wave-absorbing metamaterial based on microfluidic technology and performance regulation and control device thereof
  • Medium-adjustable wave-absorbing metamaterial based on microfluidic technology and performance regulation and control device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] In this example, the thickness t of the printed sample is 2.4 mm, the cross-sectional shape of the microchannel is square, and d 1 is 0.6mm, and the distance between adjacent microchannels is d 2 It is 1.0mm, and the microfluidic chip is fabricated by photocuring 3D printing technology.

[0080] In this embodiment, three different solutions are selected: Pedotpss intrinsically conductive polymer solution, pure water and ethanol. The microwave absorption performance of the sample was tested by the waveguide method, and the microwave absorption rate (Absorption) test results of the intrinsically conductive polymer solution (Pedotpss), pure water (Water), and ethanol (Ethanol) in the X-band with different mass ratios were obtained. Including: Pedotpss:Water(P:W)=1:0, 1:1, 1:3; Ethanol:Water(E:W)=1:4, 1:10, and pure water W and unfilled liquid medium samples microwave absorptivity.

[0081] like Figure 4 shown, Figure 4 It is the microwave absorptivity test results o...

Embodiment 2

[0084] In this example, the thickness t of the printed sample is 2.4 mm; the cross-sectional shape of the microchannel is square, and d 1 is 0.6mm, and the distance between adjacent microchannels is d 2 0.3mm, 0.5mm, 0.75mm, 1.0mm, 1.5mm, and 1.75mm, respectively. The microfluidic chip is prepared by photocuring 3D printing technology. Pure water was injected into all samples in this example as a microwave loss medium. The wave-absorbing properties of the samples were tested by the waveguide method, and the experimental results are shown in the attached Figure 5 shown, Figure 5 is the distance d between adjacent microfluidic channels according to embodiments of the present disclosure 2 The microwave absorptivity test results in the X-band of samples of 0.3mm, 0.5mm, 0.75mm, 1.0mm, 1.5mm, and 1.75mm, respectively. The results show that by adjusting the distance between adjacent microchannels, the microwave absorption peak of the microfluidic chip can be moved in the enti...

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Abstract

The invention relates to a medium-adjustable wave-absorbing metamaterial based on a microfluidic technology and a performance regulation and control device of the medium-adjustable wave-absorbing metamaterial. The medium-adjustable wave-absorbing metamaterial comprises a total reflection layer, and at least one metamaterial layer containing a micro-channel, wherein the metamaterial layer is arranged on the total reflection layer. The performance regulation and control device comprises a liquid medium pushing assembly, a liquid medium mixing assembly, the medium-adjustable wave-absorbing metamaterial and a liquid medium recoverer which are sequentially communicated through a liquid conveying pipeline in the flowing direction of a liquid medium, wherein the medium-adjustable wave-absorbing metamaterial is used for achieving the wave-absorbing performance of the metamaterial from the two aspects of material and structure. According to the invention, the separation of the wave-absorbing metamaterial function structure and the control assembly is realized, the wave-absorbing metamaterial structure part has a small thickness, the characteristics of the wave-absorbing medium in the micro-channel can be accurately regulated in real time, and the efficient wave-absorbing performance is obtained.

Description

technical field [0001] The present disclosure relates to the technical field of microfluidics and wave-absorbing metamaterials, and in particular, to a medium-tunable wave-absorbing metamaterial based on microfluidic technology and a device for regulating its performance. Background technique [0002] Microfluidics technology, also known as lab-on-a-chip technology, has channels and components as small as tens of microns in size, which can flexibly manipulate tiny volumes of fluid to flow in channels or components. Microfluidic technology is an important emerging method to realize the design, preparation and performance regulation of new functional materials with precise and controllable microstructure. It is expanding from chemical platform drug analysis and detection to many fields. [0003] Electromagnetic absorbing metamaterials are composed of periodic repeating units, which can effectively absorb and attenuate electromagnetic radiation and achieve the goal of eliminati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01L3/00
CPCB01L3/5027B01L2300/12
Inventor 段慧玲梁吉勇吕鹏宇
Owner PEKING UNIV
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