Nanofiber membrane and preparation method thereof, nanofiber composite and preparation method thereof

A technology of nanofiber membranes and nanomaterials, applied in the fields of its preparation, nanofiber composite materials, and nanofiber membranes, can solve the problems of low porosity, limited ability to purify toxic gases, complex manufacturing process, etc., and achieve a good effect of purifying air

Active Publication Date: 2014-10-15
ZHEJIANG WEIXING IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The use of membrane materials to absorb and filter toxic gases in the air is a commonly used method at present. Most of the raw materials of these membrane materials are polymer materials, such as polytetrafluoroethylene, polyphenylene sulfide, polyester fiber and acetate fiber. However, the current production process of these products is complicated, the porosity is low, and the ability to purify indoor toxic gases is limited.
Moreover, as people pay more attention to particulate matter (PM2.5) that can enter the lungs, people have put forward higher requirements for membrane materials that purify the air. requirements

Method used

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  • Nanofiber membrane and preparation method thereof, nanofiber composite and preparation method thereof
  • Nanofiber membrane and preparation method thereof, nanofiber composite and preparation method thereof

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preparation example Construction

[0043] The present invention also provides a kind of preparation method of nanofiber membrane, comprises the following steps:

[0044] A) mixing a polymer and a nanomaterial to obtain a mixture, the nanomaterial comprising a photocatalyst and an adsorbent;

[0045] B) spinning the mixture to obtain a nanofibrous membrane.

[0046] When the spinning method adopts electrospinning, the present invention preferably prepares nanofibrous membrane according to the following steps:

[0047] dissolving the polymer and the nanomaterial in a solvent to obtain a mixture;

[0048] The mixture was electrospun to obtain a nanofibrous membrane.

[0049] In the present invention, the polymer is preferably first dried to obtain a first dried polymer, and the first dried polymer and nanomaterials are dissolved in a solvent to obtain a mixture. In the present invention, the first drying temperature is preferably 60-160°C, more preferably 70-155°C, most preferably 80-150°C; the first drying tim...

Embodiment 1

[0092] Dry the PVDF powder and PVDF-HFP powder in a vacuum drying oven at 100°C for 12 hours, then cool to room temperature, and put them into a desiccator for later use.

[0093] Weigh 120g dry PVDF powder and dissolve it in the mixed solvent of 880g acetone and DMF, stir at room temperature for 12h to obtain a transparent PVDF spinning solution; disperse 6g nano activated carbon in the obtained PVDF spinning solution, and mix the obtained mixed solution After the ultrasonic dispersion is uniform, the PVDF spinning solution is obtained and set aside.

[0094] Take by weighing 120g dry PVDF-HFP powder and be dissolved in 880g DMF and acetone mixed solvent, stir 12h at room temperature, obtain PVDF-HFP spinning solution, disperse 5g nano titanium dioxide in the PVDF-HFP spinning solution that obtains, will get After ultrasonic dispersion of the mixed solution for 6 hours, the PVDF-HFP spinning solution was obtained and set aside.

[0095] The viscosities of the obtained PVDF s...

Embodiment 2

[0109] Put the PET powder and PVDF powder in a vacuum drying oven at 100°C for 12 hours, cool to room temperature, and put them in a desiccator for later use.

[0110] Weigh 150g of dry PET powder and dissolve it in a mixed solvent of 850 trifluoroacetic acid and dichloromethane, stir at room temperature for 12h to obtain a transparent PET spinning solution, add 10g of nano-aluminum hydroxide, 9g of nano-activated carbon, and disperse evenly , put it aside for later use;

[0111] Weigh 120g of dry PVDF powder and dissolve it in 880g of DMF and acetone mixed solvent, stir at room temperature for 12h to obtain a PVDF spinning solution, add 6g of nano titanium dioxide, disperse evenly, and let it stand for later use.

[0112] The measured solution viscosities of PET spinning solution and PVDF spinning solution are 2.8Pa·s and 3.1Pa·s respectively.

[0113] At a room temperature of 25°C and a relative air humidity of about 30%, the PET spinning solution is mixed and cross-spun th...

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Abstract

The invention provides a nanofiber membrane. The nanofiber membrane is made of mixture by spinning. The mixture includes polymers and nanofiber materials in the mass ratio of 1:(0.01-0.2). The nanofiber materials are composed of photocatalyst and adsorbent. The adsorbent and the photocatalyst are used in the nanofiber membrane, the adsorbent can adsorb harmful gas in an adsorption chamber, the photocatalyst is capable of degrading and adsorbing harmful organics in holes of the adsorbent into carbon dioxide and water under the condition of indoor light rays and irradiation of a daylight lamp, and activates and regenerates the adsorbent in situ when decomposing the harmful organics on the adsorbent in the meantime, so that the adsorbent and the photocatalyst are reusable, and the nanofiber membrane has excellent air purification capacity. The invention further provides a preparation method of the nanofiber membrane and a nanofiber composite and a preparation method thereof.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a nanofiber membrane, a preparation method thereof, a nanofiber composite material and a preparation method thereof. Background technique [0002] The indoor environment is the main place for people to live, work and socialize. People spend at least 80% of their time indoors and only less than 5% of their time outdoors. Infants, young children, pregnant women People such as the old, the weak, the sick, and the disabled stay indoors for a longer time. Therefore, healthy and comfortable indoor air is a necessary living environment for human life. [0003] However, since many modern buildings are designed to be fully enclosed for the sake of aesthetics, the natural infiltration ventilation capacity is reduced. Moreover, the decoration of modern buildings is more luxurious, and the decoration materials are more diversified, but these are pollution sources that release c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/4382B32B27/12B32B33/00
Inventor 陈国贵宋学礼刘艳新
Owner ZHEJIANG WEIXING IND DEV
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