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MXene/polyimide nanofiber aerogel and preparation method and application thereof

A technology of polyimide fibers and nanofibers, applied in fiber processing, fiber chemical characteristics, electrical components, etc., can solve problems such as high process difficulty, poor shielding performance, unsatisfactory shape or mechanical properties, etc.

Active Publication Date: 2021-07-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention aims at the technical problems existing in the existing polyimide / MXene electromagnetic shielding film and its preparation method, such as poor shielding performance, high process difficulty, and inability to meet certain requirements for the three-dimensional shape or mechanical properties of the material, and provides an MXene / Polyimide nanofiber airgel and its preparation method and application

Method used

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  • MXene/polyimide nanofiber aerogel and preparation method and application thereof
  • MXene/polyimide nanofiber aerogel and preparation method and application thereof

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Embodiment 1

[0029] Such as figure 2 Shown, the present invention provides a kind of MXene / polyimide fiber airgel, and it contains MXene and polyimide fiber, and polyimide fiber is polyimide nanofiber, and described polyimide nanofiber The MXene is distributed in the polyimide nanofiber in the form of a sheet, and the airgel has a thickness of 2 mm to 8 mm.

Embodiment 2

[0031] The preparation method of the MXene / polyimide fiber airgel applied to the field of electromagnetic shielding provided by embodiment 2 comprises the following steps:

[0032] (1) The polyamic acid solution was diluted to 12wt% with DMF, and magnetically stirred for 12h. The polyamic acid nanofibers were prepared by electrospinning; the advancing speed was 1ml / h, the voltage was 15kV; the fibers were received by aluminum foil, and the receiving distance was 20cm. Put the fiber membrane in a ventilated place to evaporate the solvent.

[0033] (2) Cut the fibrous membrane prepared in step (1) into square pieces of 1 cm×1 cm, mix with water, and add 10 mg / ml of the fibrous membrane. Break the fiber film with a high-speed mixer to obtain a polyamic acid nanofiber / water mixture; the speed of the high-speed mixer is 6000r / min;

[0034] (3) Add polyethylene glycol to the polyamic acid nanofiber / water mixture prepared in step (2), and the amount of polyethylene glycol added is ...

Embodiment 3

[0040] The preparation method of the MXene / polyimide fiber airgel applied to the field of electromagnetic shielding provided by embodiment 3 comprises the following steps:

[0041] (1) Dilute the polyamic acid solution to 12 wt% with DMF, and stir it magnetically for 12 hours. The polyamic acid nanofibers were prepared by electrospinning; the advancing speed was 1ml / h, the voltage was 15kV; the fibers were received by aluminum foil, and the receiving distance was 20cm. Put the fiber membrane in a ventilated place to evaporate the solvent.

[0042](2) Cut the fibrous membrane prepared in step (1) into square pieces of 1 cm×1 cm, mix with water, and add 10 mg / ml of the fibrous membrane. Break the fiber film with a high-speed mixer to obtain a polyamic acid nanofiber / water mixture; the speed of the high-speed mixer is 6000r / min;

[0043] (3) Add polyethylene glycol to the polyamic acid nanofiber / water mixture prepared in step (2), and the amount of polyethylene glycol added is ...

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Abstract

The invention relates to MXene / polyimide nanofiber aerogel and a preparation method and application thereof, and solves the technical problems that an existing material is poor in shielding performance and high in process difficulty and cannot meet certain requirements on the three-dimensional shape or mechanical property of the material, the MXene / polyimide nanofiber aerogel contains MXene and polyimide fibers, the polyimide fibers are polyimide nanofibers, the polyimide nanofibers are in a net shape, the MXene is distributed in the polyimide nanofibers in a sheet shape, and the thickness of the aerogel is 2-8 mm. The invention also provides a preparation method and application of the MXene / polyimide nanofiber aerogel. The MXene / polyimide nanofiber aerogel can be applied to the field of preparation of electromagnetic shielding functional materials.

Description

technical field [0001] The invention relates to an electromagnetic shielding functional material and its preparation method and application, in particular to an MXene / polyimide nanofiber airgel and its preparation method and application. Background technique [0002] With the development of communication technology and intelligent electronic equipment, the interference and leakage of electromagnetic waves have caused a series of problems, such as disrupting precision equipment, stealing information transmission, and endangering human health. Therefore, high-performance electromagnetic shielding materials have received extensive research and attention. At present, domestic electromagnetic shielding materials are mainly conductive metals, which have problems such as high density, easy corrosion, poor flexibility, and difficult processing. [0003] Aerogel has extremely low density, large specific surface area and adjustable pore structure, making it an ideal electromagnetic s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K3/14C08K3/28C08J9/28D01F6/74D01D5/00H05K9/00
CPCC08J9/28C08J9/0066D01F6/74D01D5/003H05K9/0081C08J2379/08C08K3/14C08K3/28C08J2205/026C08J2201/0484
Inventor 隋刚吴凌云杨小平
Owner BEIJING UNIV OF CHEM TECH
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