Lightweight porous MXene-based composite film electromagnetic shielding material and preparation method thereof

A technology of electromagnetic shielding material and composite film, which can be applied in the fields of magnetic field/electric field shielding, electrical components, etc., can solve the problems of MXene conductivity and stability, uneven pore structure, etc., to achieve multiple scattering/reflection effects increase, simple operation , the effect of improving the absorption capacity

Pending Publication Date: 2021-08-31
JIANGNAN UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, by adding foaming agents to assist in the construction of the internal pore structure of MXene, the pore structure is of

Method used

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  • Lightweight porous MXene-based composite film electromagnetic shielding material and preparation method thereof
  • Lightweight porous MXene-based composite film electromagnetic shielding material and preparation method thereof
  • Lightweight porous MXene-based composite film electromagnetic shielding material and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0038] Example 1

[0039] (1) Preparation of MXENE / GO dispersion:

[0040] MXENE was prepared: 2 GliF was dissolved in 10 ml of water and 30 ml of concentrated hydrochloric acid by magnetic stirring in the polytetrafluoroethylene beaker, and then 2G400 oil carbonate aluminum (Ti) 3 ALC 2 , MAX) powder, placed in a 35 ° C water bath for 24 h, followed by water with anhydrous ethanol and ultrapure water, and removing the residual impurities. The resulting MXENE dispersion is freeze and stands for use.

[0041] Preparation of oxide oxide (GO): 4 g 325 目 石 石 ink, 480 ml of concentrated sulfuric acid and 54 ml of concentrated phosphoric acid were added to 1000 ml of three flasks, and 24 g of potassium permanganate was slowly added after 30 min, and continued to stir up, water bath 50 ° C 12h. After the reaction was completed, the mixture was slowly poured into a beaker with 800 ml of deionized water, and mixed with a glass rod. The hydrogen peroxide solution was added dropwise to the...

Example Embodiment

[0046] Example 2

[0047] (1) Preparation of MXENE / GO dispersion:

[0048] Dissolving 126 mgmxene in an appropriate amount of ultrapure water, after ultrasound and magnetic stirring, MXENE is uniformly dispersed, and then 4.7 mL of 50% polyvinimide aqueous solution is added. After sufficiently stirring, it is uniform, and it is placed in a high-speed centrifuge. After the 1.5H11000 r / min is centrifuged, then the layer precipitate is removed, then the ultrapure water is uniform, and after 4, after adding 25 ml of ultrapure water, then adding a uniform 7 mg / ml oxide oxide dispersion of ultrasound stirring dispersion. , Mix evenly with magnetic stirring, named M-G10 dispersion.

[0049] (2) Preparation of light porous MXENE compound film

[0050] MXENE / GO film: Take the MXENE / GO dispersion obtained by 5 ml of step (1), discharging on the polyethylene terephthalate (PET) sheet after leveling, vacuum oven, vacuum oven Dry, the vacuum was -0.08 mPa, the temperature was 50 ° C,...

Example Embodiment

[0052] Example 3

[0053] (1) Preparation of MXENE / GO dispersion:

[0054] Take 119 mgmxene in an appropriate amount of ultrapure water, after the ultrasound and magnetic stir, MXENE is dispersed uniform, then add 4.5 mL of 50% polyvinimide aqueous solution, after sufficiently stirred, it is uniform, placed in a high speed centrifuge. After the 1.5H11000 r / min is centrifuged, then the layer precipitate is removed, then the ultrapure water is uniform, and after 4, after adding 24 ml of ultrapure water, then the ultrasonic stirred dispersion is uniformly dispersed, and the oxide dispersion is dispersed. The mix is ​​mixed under magnetic stirring, named M-G15 dispersion.

[0055] (2) Preparation of light porous MXENE compound film

[0056] MXENE / GO film: Take the MXENE / GO dispersion obtained by 5 ml of step (1), discharging on the polyethylene terephthalate (PET) sheet after leveling, vacuum oven, vacuum oven Dry, the vacuum was -0.08 MPa, the temperature was 50 ° C, after dr...

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Abstract

The invention discloses a lightweight porous MXene-based composite film electromagnetic shielding material and a preparation method thereof, and belongs to the technical field of film electromagnetic shielding materials and preparation thereof. Self-assembly of MXene and graphene oxide is realized by taking electrostatic interaction force as driving force on MXene modified by a cationic surface modifier and graphene oxide, and then the lightweight porous MXene-based composite electromagnetic shielding material with ultrahigh specific performance is obtained through film casting and high-temperature annealing. The prepared composite film material has excellent electromagnetic shielding effectiveness and specific effectiveness, and when the thickness is only 15 [mu]m, the porous MXene-based composite film obtained by adding 5 wt% of graphene oxide can keep the electromagnetic shielding effectiveness of 49 dB or above in the whole X wave band. The preparation process is simple and easy to operate, and the material is expected to be applied to the fields of aerospace, military equipment, micro electronic equipment, civil electric appliances and the like.

Description

technical field [0001] The invention relates to a lightweight porous MXene-based composite thin-film electromagnetic shielding material and a preparation method thereof, and belongs to the technical field of thin-film electromagnetic shielding materials and preparation thereof. Background technique [0002] With the rapid development of information technology, the application of electronic equipment in daily life is gradually increasing. While electronic equipment brings convenience to human life, it also brings a series of problems such as electromagnetic interference. Therefore, there is an urgent need for a light High-quality and efficient electromagnetic shielding film material. [0003] Electromagnetic shielding material, as a functional protective material that effectively isolates incident electromagnetic waves by means of reflection loss outside the material and absorption loss inside the material, has been widely used in the field of electromagnetic protection. At ...

Claims

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Application Information

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IPC IPC(8): H05K9/00
CPCH05K9/0081Y02A30/00
Inventor 王子成刘天西唐新伟李双双张亚伟
Owner JIANGNAN UNIV
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