Preparation method of electrostatically-spun polyimide/MXene electromagnetic shielding film

An electromagnetic shielding film and polyimide technology, applied in the direction of electrospinning, rayon manufacturing, filament/thread forming, etc., can solve the problems of poor mechanical properties of MXene, and achieve easy operation, excellent electromagnetic shielding function, and extensive The effect of applying the foreground

Active Publication Date: 2020-05-15
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by this invention is to provide a kind of preparation method of electrospun polyimide / MXene electromagnetic shielding film, to overcome the defects such as poor mechanical properties of electromagnetic shielding material MXene in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Treat 1g Ti with 10mL 6M hydrochloric acid and 1g lithium fluoride 3 AlC 2 Etching is carried out, the etching temperature is maintained at 35° C. to 40° C., and the etching time is 24 hours. Wash by centrifugation until the pH of the suspension is 6, and freeze-dry for 12 hours to obtain 0.8 g of multilayer Ti 3 C 2 T x powder. multilayer Ti 3 C 2 T x All the powders were dispersed in 200g of N-methylpyrrolidone (NMP), and then ultrasonicated at 90kHz for 3 hours at 3°C ​​to obtain a monolayer Ti 3 C 2 T x Dispersion, the supernatant obtained by centrifugation at 3500r / min for 1h is a uniformly dispersed monolayer Ti 3 C 2 T x solution.

[0039](2) At 0°C, add 4.4854g (0.02mol) of 2-(4-aminophenyl)-5-aminobenzimidazole (BIA), 90mL of NMP and 8.885g (0.02mol) to a three-necked flask The hexafluorodianhydride (6FDA) was continuously reacted for 10 h to obtain a high-viscosity polyamic acid solution for subsequent use.

[0040] (3) Under the protection ...

Embodiment 2

[0049] (1) Treat 2g Ti with 20mL 6M hydrochloric acid and 2g lithium fluoride 3 AlC 2 Etching is carried out, the etching temperature is maintained at 35° C. to 40° C., and the etching time is 24 hours. Wash by centrifugation until the pH of the suspension is 6, and freeze-dry for 12 hours to obtain 1.4 g of multilayer Ti 3 C 2 T x powder. multilayer Ti 3 C 2 T x All the powders were dispersed in 220g N,N'-dimethylacetamide (DMAc), and then at 4°C, the monolayer Ti 3 C 2 T x Dispersion liquid, the supernatant obtained by centrifugation at 3500r / min for 1h is a uniformly dispersed monolayer Ti 3 C 2 T x solution.

[0050] (2) At 0°C, add 12.02g (0.06mol) of 4,4'-diaminodiphenyl ether (ODA), 200mL of DMAc, and 17.65g (0.06mol) of 3,3' into a three-necked flask , 4,4'-biphenyltetracarboxylic dianhydride (BPDA), and continue to react for 9 hours to obtain a high-viscosity polyamic acid solution for later use.

[0051] (3) Under the protection of argon, mix the solut...

Embodiment 3

[0060] (1) Treat 1g Ti with 10mL 9M hydrochloric acid and 1g lithium fluoride 3 AlC 2 Etching is carried out, the etching temperature is maintained at 35° C. to 40° C., and the etching time is 24 hours. Wash by centrifugation until the suspension pH = 6, freeze-dry for 12 hours to obtain 0.75g multilayer Ti 3 C 2 T x powder. multilayer Ti 3 C 2 T x All the powders were dispersed in 150g N,N'-dimethylformamide (DMF), and then at 2°C, the monolayer Ti 3 C 2 T x Dispersion liquid, the supernatant obtained by centrifugation at 3500r / min for 1h is a uniformly dispersed monolayer Ti 3 C 2 T x solution.

[0061] (2) At 0°C, add 4.4854g (0.02mol) of 2-(4-aminophenyl)-5-aminobenzimidazole (BIA), 80mL of DMAc, and 5.8844g (0.02mol) ) of 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA), and continue to react for 8 hours to obtain a high-viscosity polyamic acid solution, which is set aside.

[0062] (3) Under the protection of argon, mix the solutions of step (1) and st...

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Abstract

The invention relates to a preparation method of an electrostatically-spun polyimide/MXene electromagnetic shielding film. The method comprises the steps that diamine monomers, dianhydride monomers and a solvent are mixed and stirred for a reaction, an obtained polyamide acid solution is mixed with an MXene solution, and the mixed solution is subjected to ultrasonic treatment, deaeration, electrostatic spinning and cyclization. According to the method, raw materials are safe and environmentally friendly, and industrial application and popularization are facilitated; and the obtained polyimide/MXene electromagnetic shielding film has excellent mechanical strength, corrosion resistance, irradiation resistance, heat resistance, electrical conductivity, electromagnetic shielding function and other characteristics.

Description

technical field [0001] The invention belongs to the field of preparation of polyimide nano film, in particular to a preparation method of electrospun polyimide / MXene electromagnetic shielding film. Background technique [0002] With the development of electronic technology and the wide application of electronic devices and wireless communication equipment, electromagnetic radiation and interference also follow. These electromagnetic pollution not only do not interfere with the normal operation of electronic components, but also cause potential health hazards to the human body. harm. [0003] Traditional electromagnetic shielding materials are mainly high-conductivity metals, such as copper and silver. Although these materials have sufficient high shielding energy efficiency, they are mainly realized by reflecting electromagnetic waves, not attenuating electromagnetic waves in the true sense. The new electromagnetic shielding material MXene is a two-dimensional transition m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H3/009D04H3/033D01D5/00D01F6/94D01F1/10
CPCD04H3/009D04H3/033D01D5/003D01F6/94D01F1/10D10B2331/14
Inventor 赵昕王哲张清华董杰甘锋李琇廷吴迪徐国芬
Owner DONGHUA UNIV
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