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Electrostatic anti-haze composite gridding cloth with piezoelectric effect, and electrostatic anti-haze screen window prepared through electrostatic anti-haze composite gridding cloth

A piezoelectric effect, mesh cloth technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, electrostatic effect separation, generator/motor and other directions, can solve the problem of reduced adsorption efficiency, difficult to achieve, process It can improve the service life, improve the adsorption efficiency, and simplify the power injection process.

Pending Publication Date: 2019-09-17
北京中科艾加科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, at this stage, the vast majority of electret electrostatic filter materials inject charges into the filter membrane / network through electrodes during processing. The shielding effect of electricity, which makes the charge on the surface of the filter material decay faster, the adsorption efficiency decreases rapidly, and it is not only difficult to re-inject the charge, but also difficult to achieve
This limits the application of organic electret filter material to a great extent

Method used

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  • Electrostatic anti-haze composite gridding cloth with piezoelectric effect, and electrostatic anti-haze screen window prepared through electrostatic anti-haze composite gridding cloth
  • Electrostatic anti-haze composite gridding cloth with piezoelectric effect, and electrostatic anti-haze screen window prepared through electrostatic anti-haze composite gridding cloth
  • Electrostatic anti-haze composite gridding cloth with piezoelectric effect, and electrostatic anti-haze screen window prepared through electrostatic anti-haze composite gridding cloth

Examples

Experimental program
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Effect test

preparation example Construction

[0055] The preparation method of described polyvinylidene fluoride nanocomposite material, described method comprises the following steps:

[0056] 1) Dissolving carbon nanomaterials or graphene oxide sheets and polyvinylidene fluoride modified by surface carboxyl groups in an organic solvent, ultrasonically dispersing, and centrifuging to collect the supernatant;

[0057] 2) Casting the supernatant in step 1) into a film and solidifying to prepare the polyvinylidene fluoride nanocomposite material.

[0058] In the present invention, in step 1), the organic solvent is selected from N,N-dimethylformamide, acetone and the like.

[0059] In the present invention, in step 1), the ultrasonic time is 30 minutes.

[0060] In the present invention, in step 2), the casting film is to pour the mixed solution of the polyvinylidene fluoride prepared above and the surface carboxyl-modified carbon nanotube material or graphene oxide sheet carbon nanomaterial according to a certain amount. ...

Embodiment 1

[0066] Example 1. Attach the polyvinylidene fluoride nanocomposite material with piezoelectric effect to the supporting grid skeleton to make a static anti-haze composite grid cloth and study its macroscopic and microscopic structure

[0067] 1. Preparation of polyvinylidene fluoride nanocomposites (GO content is 0.1wt%, 0.2wt%, 0.5wt%, 0.75wt%, 1.0wt%, 1.5wt% or 2.0wt%)

[0068] Dissolve the surface carboxyl-modified graphene oxide sheet (GO) and polyvinylidene fluoride with a molecular weight of 500,000-550,000 g / mol in N,N-dimethylformamide, ultrasonically disperse for 30 minutes, and centrifuge to collect the supernatant liquid, poured into a mold, and cured at 70°C for 15 hours to prepare the polyvinylidene fluoride nanocomposite material;

[0069] Wherein, the graphene oxide sheet layer modified by the carboxyl group on the surface accounts for 0.1wt%, 0.2wt%, 0.5wt%, 0.75wt%, 1.0wt%, 1.5wt% or 2.0 wt%.

[0070] 2. Preparation of Supporting Grid Skeleton

[0071] A su...

Embodiment 2

[0079] Embodiment 2, the anti-static anti-haze composite grid cloth is made into a device, and its piezoelectric performance is studied

[0080] The electrostatic anti-haze composite mesh cloth of Example 1 (wherein, the GO content is respectively 0.1wt%, 0.2wt%, 0.5wt%, 0.75wt%, 1.0wt%, 1.5wt% or 2.0wt%) is made into a device , figure 2It is the piezoelectric current diagram of the electrostatic anti-haze composite grid cloth device; among them, under the same piezoelectric condition, the first peak and the second peak from left to right represent that under the piezoelectric condition, the GO content is 0.1wt%. The piezoelectric current diagram of the device made of composite mesh cloth, the third peak and the fourth peak from left to right represent the piezoelectric current of the device made of composite mesh cloth with GO content of 0.2wt% under the piezoelectric condition In the figure, the fifth peak and the sixth peak from left to right represent the piezoelectric c...

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Abstract

The invention discloses an electrostatic anti-haze composite gridding cloth with a piezoelectric effect, and an electrostatic anti-haze screen window prepared through the electrostatic anti-haze composite gridding cloth. The electrostatic anti-haze composite gridding cloth comprises a supporting grid skeleton and a polyvinylidene fluoride nanocomposite, wherein the polyvinylidene fluoride nanocomposite has the piezoelectric effect and covers the surface of the grid skeleton; the polyvinylidene fluoride nanocomposite comprises polyvinylidene fluoride and a surface carboxyl modified carbon nanomaterial or graphene oxide sheet layer; the polyvinylidene fluoride nanocomposite is doped with the surface carboxyl modified carbon nanomaterial or the surface carboxyl modified graphene oxide sheet layer, due to high interaction between carboxyl in the surface carboxyl modified carbon nanomaterial or graphene oxide sheet layer and >CF2 in polyvinylidene fluoride, all dipole moments of polyvinylidene fluoride molecular chains are arrayed in the same direction, the structure is a beta-phase molecular structure, and thus the polyvinylidene fluoride has the quite high piezoelectric effect.

Description

technical field [0001] The invention belongs to the technical field of electret air purification, and in particular relates to an electrostatic anti-haze composite grid cloth with piezoelectric effect and an electrostatic anti-haze screen window prepared therefrom. Background technique [0002] The continuation and deterioration of haze weather in recent years has become a major environmental problem faced by our country and some countries. At present, the most direct and effective way to solve the problem of air quality in the living room or other closed environments is to filter the polluted air. At present, people mainly use air purifier devices to purify the particulate matter entering the room, but because air purification can only absorb and block suspended particulate matter in the air in a closed environment, it has greatly affected the indoor environment. of ventilation, making the CO 2 The rapid increase in the content of harmful gases such as air pollution has b...

Claims

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Application Information

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IPC IPC(8): E06B9/52B03C3/155H02N2/18
CPCE06B9/52B03C3/155H02N2/186
Inventor 李秀双牛琳卫娜
Owner 北京中科艾加科技有限公司
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