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Piezoelectric catalytic film used in air purifier and preparation method thereof

An air purifier and catalytic membrane technology, applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as complex implementation conditions, and achieve the effect of good piezoelectric catalytic performance

Active Publication Date: 2021-06-04
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There have been many studies using photocatalysis to degrade organic pollutants. It has been proved to be an effective technology, but it requires additional light source preparation and effective light contact area, and the implementation conditions are relatively complicated.

Method used

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  • Piezoelectric catalytic film used in air purifier and preparation method thereof
  • Piezoelectric catalytic film used in air purifier and preparation method thereof
  • Piezoelectric catalytic film used in air purifier and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] Example 1 Preparation and Power Generation Performance of Piezoelectric Catalytic Film

[0028] Attached below figure 1 Embodiments of the present invention are further described:

[0029] First prepare the precursor mixed solution: weigh 0.0204~0.1111g of carbon black (or graphene or carbon nanotubes) and 1g of polyvinylidene fluoride-hexafluoropropylene particles into 5-10ml of acetone, dissolve and disperse at room temperature for 6 hours, to obtain the spinning solution; weigh 0.0204~0.1111g carbon black (or graphene or carbon nanotubes) and 1g polyvinylidene fluoride-hexafluoropropylene particles into 10-20ml acetone, dissolve at room temperature, add 1 -3ml of water to obtain a phase-separated spray solution.

[0030] Porous membrane preparation on fabrics by electrospinning or phase-separation spray coating.

[0031] Then stand at room temperature for 24 hours to obtain a porous polyvinylidene fluoride-hexafluoropropylene composite membrane;

[0032] The comp...

Embodiment 2

[0033] Embodiment 2 Piezoelectric catalytic membrane catalytic performance

[0034] Attached below figure 2 Embodiments of the present invention are further described:

[0035] Prepare porous polyvinylidene fluoride-hexafluoropropylene composite films (3, 5, 8wt%) with different carbon black contents on commercial filter screens of the same area. The commercial filter screen has only filtering function and no catalytic function. After the ethylene-hexafluoropropylene composite porous piezoelectric catalytic membrane, the effects of carbon black content and wind force on the removal rate of indoor organic pollutants were tested. Table 1 shows the removal effects of different carbon black contents and wind power on formaldehyde, benzene, and CO. The test conditions were 30 flat indoor environments, and the purification was performed for 1 hour.

[0036] Table 1 The removal effect of different carbon black contents and wind power on formaldehyde, benzene and CO

[0037]

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Abstract

The invention belongs to the technical field of air purification, and discloses a piezoelectric catalytic membrane used in an air purifier, comprising a piezoelectric polymer and a carbon material used as a piezoelectric polymer electrode, and its preparation method is to make polyvinylidene fluoride ‑Hexafluoropropylene is mixed with one or more of carbon black, graphene, and carbon nanotubes to prepare a precursor solution, and to prepare polyvinylidene fluoride‑hexafluoro with a high voltage phase by electrospinning or phase separation spraying Propylene is porous and thin, and it is loaded on the filter element of a commercial air purifier. The airflow disturbance in the air purifier makes the polyvinylidene fluoride-hexafluoropropylene porous composite membrane vibrate, and produces piezoelectric catalytic function, which makes it efficiently remove indoor volatile organic matter.

Description

technical field [0001] The invention belongs to the field of indoor air purification and provides a piezoelectric catalytic film used in an air purifier and a preparation method thereof. Background technique [0002] There are many pollutants indoors, including particulate matter, gaseous pollutants, microorganisms and hydrocarbons (toluene, xylene, formaldehyde and other organic components), among which formaldehyde is one of the most common pollutants in indoor air. These pollutants affect health and even cause cancer. Therefore, it is imminent to remove PM, microorganisms and formaldehyde from indoor air. [0003] At present, methods such as biological treatment, adsorption, photocatalysis, plasma, and thermal catalytic oxidation have been widely used for treatment, but there are many limitations. Adsorption technology is limited by the capacity of the adsorbent; photocatalytic oxidation requires additional light sources and effective irradiation; plasma technology is c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/06B01J35/10B01J37/02B01D53/32B01D53/44B01D53/86
CPCB01J31/06B01J37/0215B01D53/32B01D53/44B01D53/86B01D53/8687B01D2258/06B01J35/33B01J35/59B01J35/60Y02A50/20
Inventor 佟望舒张以河柴梦楠安琪
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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