Terahertz wave broadband super-strong absorption foam based on MXene

A super-absorbent, foam technology, applied in electrical components, antennas, etc., can solve the problems of high production cost, poor mechanical stability, complex preparation process, etc., and achieve the effects of good hydrophobicity, light weight, and excellent mechanical properties.

Active Publication Date: 2020-11-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF6 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a structure-stable, large-bandwidth, strong-absorbing terahertz wave absorber based Terahertz wave broadband superabsorbing foam of MXene

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Terahertz wave broadband super-strong absorption foam based on MXene
  • Terahertz wave broadband super-strong absorption foam based on MXene
  • Terahertz wave broadband super-strong absorption foam based on MXene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation method of MXene-based terahertz wave broadband super-absorbing foam with different apertures provided in this example includes the following steps:

[0044] Step 1: Mix hydrochloric acid, hydrofluoric acid and deionized water evenly to obtain 63mL etching solution, wherein the volume ratio of hydrochloric acid, hydrofluoric acid and deionized water is 4:1:2; then, 3g Ti 3 AlC 2 The powder was slowly added to the etching solution, stirred at room temperature for 24 hours, and the Ti was selectively etched away. 3 AlC 2 Al layer in MAX phase, resulting in Ti 3 C 2 T x MXene acid solution;

[0045] Step 2: Ti obtained in Step 1 3 C 2 T x Add deionized water to the acidic solution of MXene for centrifugation and washing for several times until the pH value of the supernatant is 6, then filter and separate to obtain multilayer Ti 3 C 2 T x MXene precipitates; then, the resulting multilayer Ti 3 C 2 T x The MXene precipitate was dispersed in...

Embodiment 2

[0050] The preparation method of the terahertz wave broadband super-absorbing foam with different MXene filling qualities provided in this embodiment includes the following steps:

[0051] Step 1: Mix hydrochloric acid, hydrofluoric acid and deionized water evenly to obtain 63mL etching solution, wherein the volume ratio of hydrochloric acid, hydrofluoric acid and deionized water is 4:1:2; then, 3g Ti 3 AlC 2 The powder was slowly added to the etching solution, stirred at room temperature for 24 hours, and the Ti was selectively etched away. 3 AlC 2 Al layer in MAX phase, resulting in Ti 3 C 2 T x MXene acid solution;

[0052] Step 2: Ti obtained in Step 1 3 C 2 T x Add deionized water to the acidic solution of MXene for centrifugation and washing for several times until the pH value of the supernatant is 6, then filter and separate to obtain multilayer Ti 3 C 2 T x MXene precipitates; then, the resulting multilayer Ti 3 C 2 T x The MXene precipitate was dis...

Embodiment 3

[0057] The preparation method of MXene-based terahertz wave broadband super-absorbing foam with different thicknesses provided in this embodiment includes the following steps:

[0058] Step 1: Mix hydrochloric acid, hydrofluoric acid and deionized water evenly to obtain 63mL etching solution, wherein the volume ratio of hydrochloric acid, hydrofluoric acid and deionized water is 4:1:2; then, 3g Ti 3 AlC 2 The powder was slowly added to the etching solution, stirred at room temperature for 24 hours, and the Ti was selectively etched away. 3 AlC 2 Al layer in MAX phase, resulting in Ti 3 C 2 T x MXene acid solution;

[0059] Step 2: Ti obtained in Step 1 3 C 2 T x Add deionized water to the acidic solution of MXene for centrifugation and washing for several times until the pH value of the supernatant is 6, then filter and separate to obtain multilayer Ti 3 C 2 T x MXene precipitates; then, the resulting multilayer Ti 3 C 2 T x The MXene precipitate was dispers...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
thicknessaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to view more

Abstract

The invention discloses MXene-based terahertz wave broadband super-strong absorption foam, and belongs to the technical field of electromagnetic functional materials. The MXene nanosheet is attached to the polymer porous foam in a coating form, a film forming form and a suspension form; the average pore diameter of the porous polymer foam is greater than or equal to 500 microns, the thickness of the porous polymer foam is less than or equal to 10 mm, and the filling mass of the MXene nanosheet is less than 50% of the mass of the absorbed foam. According to the invention, by utilizing the ultrahigh conductivity of the MXene two-dimensional nanosheet and the high dispersity of the MXene two-dimensional nanosheet in an aqueous solution, a three-dimensional network structure considering largeaperture and large absorption area is formed by compounding the MXene two-dimensional nanosheet with surface functionalized polymer porous foam, so the ultrahigh absorption rate of 99.99% or above andthe extremely low reflectivity of 0.00003% within the range of 0.3-1.65 THz are realized.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic functional materials, and relates to an electromagnetic wave absorption structure, in particular to an MXene-based terahertz wave broadband super-absorbing foam. Background technique [0002] Terahertz (THz) waves refer to electromagnetic waves with frequencies in the range of 0.1 THz to 10 THz, and wavelengths in the range of 3 mm to 30 μm. Because terahertz waves have many excellent characteristics such as rich spectrum resources, low photon energy, good coherence, and ultra-wideband, they have shown great potential in radar detection, security imaging, nondestructive testing, biosensing, and the upcoming 6G communication. application potential. With the rapid development of terahertz practical applications, the demand for high-performance terahertz wave absorbing materials is increasing, especially in radar detection, electromagnetic shielding, wireless communication, and performance i...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01Q17/00
CPCH01Q17/00
Inventor 文岐业税文超肖旭李建民邢杨杨青慧张怀武
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap