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Flexible nanofiber membrane with electromagnetic shielding and piezoresistive sensing performance and preparation method thereof

A nanofiber film, electromagnetic shielding technology, applied in nanotechnology for material and surface science, magnetic field/electric field shielding, shielding materials, etc., can solve the problem that metal electromagnetic shielding materials are easily corroded, difficult to recycle, and polluted in the production process and other problems, to achieve excellent electromagnetic shielding performance, make up for poor flexibility, and be environmentally friendly.

Active Publication Date: 2022-03-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a flexible nanofiber membrane with electromagnetic shielding and piezoresistive sensing properties and its preparation method to solve the problem that traditional metal electromagnetic shielding materials are prone to corrosion, poor mechanical properties, serious pollution in the production process and material preparation process. The disadvantages of nanoparticle agglomeration and difficulty in recycling, etc., maximize the service life of electromagnetic shielding materials and enhance their practicability

Method used

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  • Flexible nanofiber membrane with electromagnetic shielding and piezoresistive sensing performance and preparation method thereof
  • Flexible nanofiber membrane with electromagnetic shielding and piezoresistive sensing performance and preparation method thereof
  • Flexible nanofiber membrane with electromagnetic shielding and piezoresistive sensing performance and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] (1) 2.00 g of polyacrylonitrile (PAN) was dissolved in 18.00 g of N,N-dimethylformamide (DMF), and mechanically stirred at 45° C. for 10 h to prepare a uniform and clear precursor solution. After the resulting spinning solution was cooled to room temperature, it was put into an electrospinning syringe, and the electrospinning product was received by using a stainless steel needle as an anode and a flat aluminum foil as a cathode, keeping the distance between the needle and the receiving plate at 17 cm. Electrospinning under voltage for 20 h, and a PAN nanofiber film was obtained on a flat aluminum foil.

[0037] (2) Put 120 mg of the PAN nanofiber membrane obtained in step (1) into 100 mL of absolute ethanol, and perform infiltration treatment for 1.5 h.

[0038] (3) Peel off the fibrous membrane after soaking treatment in step (2) from the flat aluminum foil and put it into a dopamine solution with a volume of 80 mL and a concentration of 7.88 mg / mL (solvent is pH=8.5,...

Embodiment 2

[0043] (1) 2.00 g of polyacrylonitrile was dissolved in 18.00 g of N,N-dimethylformamide (DMF), and mechanically stirred at 45° C. for 10 h to prepare a uniform and clear precursor solution. After the resulting spinning solution was cooled to room temperature, it was put into an electrospinning syringe, and the electrospinning product was received by using a stainless steel needle as an anode and a flat aluminum foil as a cathode, keeping the distance between the needle and the receiving plate at 17 cm. Electrospinning under voltage for 20 h, and a PAN nanofiber film was obtained on a flat aluminum foil.

[0044] (2) Peel off 120 mg of the nanofiber membrane obtained in step (1) from the flat aluminum foil, put it into 100 mL of absolute ethanol, and perform soaking treatment for 1.5 h.

[0045] (3) Put the fibrous membrane after the soaking treatment in (2) into a dopamine solution with a volume of 80 mL and a concentration of 7.88 mg / mL (the solvent is pH=8.5, 50 mM Tris-HCl...

Embodiment 3

[0050] (1) 2.00 g of polyacrylonitrile was dissolved in 18.00 g of N,N-dimethylformamide (DMF), and mechanically stirred at 45° C. for 10 h to prepare a uniform and clear precursor solution. After the resulting spinning solution was cooled to room temperature, it was put into an electrospinning syringe, and the electrospinning product was received by using a stainless steel needle as an anode and a flat aluminum foil as a cathode, keeping the distance between the needle and the receiving plate at 17 cm. Electrospinning under voltage for 20 h, and a PAN nanofiber film was obtained on a flat aluminum foil.

[0051] (2) Peel off 120 mg of the nanofiber membrane obtained in step (1) from the flat aluminum foil, put it into 100 mL of absolute ethanol, and perform soaking treatment for 1.5 h.

[0052] (3) Put the fibrous membrane after the soaking treatment in (2) into a dopamine solution with a volume of 80 mL and a concentration of 7.88 mg / mL (the solvent is pH=8.5, 50 mM Tris-HCl...

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Abstract

The invention discloses a flexible nanofiber membrane with electromagnetic shielding and piezoresistive sensing performance and a preparation method thereof, and belongs to the technical field of multifunctional material preparation. Firstly, a polymer nanofiber membrane is obtained through an electrostatic spinning process, then an MXene coated Fe3O4 dispersion liquid is prepared, then the polymer nanofiber membrane with good hydrophilicity is prepared through dopamine modification treatment, and a target fiber membrane is obtained in combination with a spraying process. Due to the excellent conductivity of MXene and the structural characteristics of nanofibers, a conductive network is formed, and the Fe3O4 nanoparticles cooperate with one another, so that the absorption of electromagnetic waves is further realized. The obtained fiber membrane has excellent electromagnetic shielding performance and sensing performance, and also has good mechanical flexibility. Due to the ultrathin, light and wearable properties and good mechanical properties, the nano-material can be used in textile industry, military field, artificial intelligence and daily protection, and is a novel nano-material with good application prospects.

Description

technical field [0001] The invention belongs to the technical field of multifunctional material preparation, and in particular relates to a flexible nanofiber film with electromagnetic shielding and piezoresistive sensing properties and a preparation method thereof. The nanofiber film obtained in the present invention is a composite fiber film, has excellent electromagnetic interference (EMI) shielding performance, and good mechanical properties, and has good potential and application feasibility for developing flexible wearable electronic devices. Background technique [0002] The propagation of electromagnetic waves does not depend on the medium. Frequency is an important characteristic of electromagnetic waves. From low frequency to high frequency, it is mainly divided into radio waves, microwaves, infrared rays, visible light, ultraviolet rays, X-rays and gamma rays. With the rapid development of modern communication technology and portable electronic equipment towards h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M11/49D06M15/37D06M11/74D06M11/58D04H1/728D01D5/00H05K9/00B82Y30/00B82Y40/00D06M101/20D06M101/26D06M101/28D06M101/30
CPCD06M11/49D06M15/37D06M11/74D06M11/58D04H1/728D01D5/003D01D5/0069D01D5/0076H05K9/009B82Y30/00B82Y40/00D06M2101/26D06M2101/20D06M2101/28D06M2101/30
Inventor 王策杨梅王静彭润昌何大勇贾晓腾
Owner JILIN UNIV
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