High-temperature-resistant sound-absorbing fiber membrane and preparation method

A fiber membrane, high temperature resistant technology, applied in fiber processing, textiles and papermaking, non-woven fabrics, etc., can solve the problems of poor sound absorption performance, large occupied volume, poor sound absorption effect, etc., to achieve excellent sound absorption performance, large porosity, performance stability effect

Inactive Publication Date: 2018-05-29
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, polyimide foam has been studied more, but it occupies a large volume and has poor sound absorption performance at low frequencies. In addition, polyimide fibers are mainly produced by spinning polyamic acid or polyimide solutions. Its spinning process includes we

Method used

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  • High-temperature-resistant sound-absorbing fiber membrane and preparation method

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Experimental program
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Effect test

Embodiment 1

[0035] (1) Weigh 3.1 g of 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride and 2.0 g of 4,4'-diaminodiphenyl ether in equimolar amounts, and mix 4,4'-diamino Dissolve diphenyl ether in 23ml of DMF, mechanically stir until it is completely dissolved, then add 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride, stir in an ice-water bath for 4 hours, and obtain a mass fraction of 18% PAA solution; add 0.95g barium titanate (20wt%) and 0.09g graphene (2wt%) to the solution, after mixing uniformly, ultrasonically disperse at room temperature for 30min to obtain PAA / piezoelectric ceramic shell spinning solution;

[0036] (2) Weigh 3.0g PS and dissolve it in 14.5ml of DMF, and mechanically stir until completely dissolved to obtain a PS solution with a mass fraction of 18%;

[0037] (3) Select a 10ml syringe, use the above-mentioned PAA solution as the shell spinning solution, and the PS solution as the core spinning solution, and fix it on a coaxial spinning device for electros...

Embodiment 2

[0041] (1) Weigh 3.1 g of 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride and 2.0 g of 4,4'-diaminodiphenyl ether in equimolar amounts, and mix 4,4'-diamino Dissolve diphenyl ether in 18ml of DMF, mechanically stir until completely dissolved, then add 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride, stir in an ice-water bath for 4 hours, and obtain a mass fraction of 22% PAA solution; add 0.95g barium titanate (20wt%) and 0.09g graphene (2%wt) to the solution, after mixing uniformly, ultrasonically disperse at room temperature for 30min to obtain PAA / piezoelectric ceramic shell spinning solution;

[0042] (2) Weigh 3.0g PS and dissolve it in 14.5ml of DMF, and mechanically stir until completely dissolved to obtain a PS solution with a mass fraction of 18%;

[0043] (3) Select a 10ml syringe, use the above-mentioned PAA solution as the shell spinning solution, and the PS solution as the core spinning solution, and fix it on a coaxial spinning device for electrospinnin...

Embodiment 3

[0047] (1) Weigh 3.1 g of 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride and 2.0 g of 4,4'-diaminodiphenyl ether in equimolar amounts, and mix 4,4'-diamino Dissolve diphenyl ether in 16ml of DMF, mechanically stir until completely dissolved, then add 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride, stir in an ice-water bath for 4 hours, and obtain a mass fraction of 24% PAA solution; add 0.95g barium titanate (20wt%) and 0.09g graphene (2%wt) to the solution, after mixing uniformly, ultrasonically disperse at room temperature for 30min to obtain PAA / piezoelectric ceramic shell spinning solution;

[0048] (2) Weigh 3.0g PS and dissolve it in 14.5ml of DMF, and mechanically stir until completely dissolved to obtain a PS solution with a mass fraction of 18%;

[0049] (3) Select a 10ml syringe, use the above-mentioned PAA solution as the shell spinning solution, and the PS solution as the core spinning solution, and fix it on a coaxial spinning device for electrospinnin...

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Abstract

The invention provides a high-temperature resistant sound-absorbing fiber membrane and a preparation method. The fiber membrane is a polyimide piezoelectric composite nanofiber membrane with a hollowstructure; the preparation method particularly comprises the following steps that 1, a polyamide acid (PAA) solution of composite piezoelectric ceramic powder is prepared; 2, the PAA composite solution is a shell spinning solution, a polystyrene (PS) solution is a nuclear layer spinning solution, a coaxial electrospinning technology is adopted, and a PAA/PS nano composite fiber with a nuclear shell structure is obtained; 3, high-temperature imidization treatment is conducted, internal PS is removed through thermal decomposition, and a piezoelectric fiber membrane with a hollow structure is obtained; 4, polarization treatment is conducted, the polyimide nano fiber prepared through the method is uniform in size, the hollow structure is complete, the fiber membrane has the high porosity, thematerial has the light porous hollow structure facilitating sound wave dissipation and the piezoelectric effect generated by piezoelectric particles, the excellent sound absorption property is shown,the good high temperature resistant property and mechanical property are achieved, the sound absorption and noise reduction requirements in the high temperature environment can be met, and the high-temperature resistant sound-absorbing fiber membrane is applicable to the fields of aviation, spaceflight, military equipment and the like.

Description

technical field [0001] The invention relates to a high-temperature-resistant sound-absorbing fiber membrane and a preparation method thereof, belonging to the field of sound-absorbing and noise-reducing materials. Background technique [0002] With the rapid development of modern science and technology, sound absorption and noise reduction has gradually become an important topic related to the coordinated development of high technology, the environment and human beings. In many fields such as construction, transportation, aerospace and military, sound-absorbing and noise-reducing materials have attracted great attention. Fiber-based sound-absorbing materials are the most widely used materials because of their light weight, low cost and excellent sound-absorbing properties, and usually include natural fibers, inorganic fibers, metal fibers, and synthetic polymer fibers. In view of the shortcomings of inorganic fibers such as brittleness, moisture, and dust pollution, and met...

Claims

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Application Information

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IPC IPC(8): D04H1/728D01D5/00
CPCD04H1/728D01D5/0015
Inventor 汪东嵇培军张安苏王国勇
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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