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Nano-fiber thin-membrane filter material preparation method and product thereof

A nanofiber and membrane filtration technology, which is applied in separation methods, filtration separation, and dispersed particle filtration, etc., can solve the problems of poor filtration effect and achieve small diameter, good hydrophobicity and moisture resistance, and enhanced piezoelectric performance.

Pending Publication Date: 2018-10-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Traditional nanofibers for filtration mainly filter out particles and impurities through mechanical interception and electrostatic adsorption. This material has a better filtering effect under conditions of low wind speed and low flow rate; Its filtering effect is getting worse; from the perspective of ecological environment protection and human health, there is an actual demand for filter materials that are suitable for high flow and high wind speed scenarios and have better filtering effects at high flow and high wind speeds

Method used

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  • Nano-fiber thin-membrane filter material preparation method and product thereof
  • Nano-fiber thin-membrane filter material preparation method and product thereof
  • Nano-fiber thin-membrane filter material preparation method and product thereof

Examples

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preparation example Construction

[0031] The preparation method of the nanofiber membrane filter material provided by the present invention specifically comprises the following steps:

[0032] (1) Mix organic piezoelectric material or organic electrostatic adsorption material as parent material with inorganic piezoelectric material or electrostatic adsorption nanomaterial and solvent, and stir the organic piezoelectric material or organic electrostatic adsorption material at a preset temperature for a set period of time to dissolve the organic piezoelectric material or organic electrostatic adsorption material , Inorganic piezoelectric materials or electrostatic adsorption nanomaterials are uniformly dispersed to obtain a spinning solution with viscosity;

[0033] (2) spinning the obtained spinning solution by an electrospinning method, and receiving electrospinning nanofibers on the substrate to form a nanofiber film;

[0034](3) Annealing, polarization, cutting, and repolarization are performed on the nanofi...

Embodiment 1

[0044] (1) Mix 3.0g of polyvinylidene fluoride-hexafluoropropylene copolymer as a matrix material and 1g of barium titanate nanoparticles with 7.2g of acetone and 3.6g of N,N dimethylformamide, and stir at 55 degrees Celsius 3 hours, obtain spinning solution;

[0045] (2) The obtained spinning solution is added into the syringe, and the needle is connected to a high-voltage power supply, the spinning voltage is set to 25kV, the spinning distance is 10 cm, and the flow rate of the spinning solution is 1.5mL / h; the obtained diameter is Electrospinning nanofibers of 600 nanometers are received by metal rollers, and electrospinning nanofiber films are obtained after spinning for 1.5 hours;

[0046] (3) Annealing, polarization, cutting, and repolarization are performed on the obtained electrospun nanofiber film to obtain a nanofiber film filter material for high flow rate scenarios.

Embodiment 2

[0048] (1) Mix 3.0g of polyvinylidene fluoride-hexafluoropropylene copolymer as a matrix material and 0.2g of zinc oxide nanoparticles with 7.2g of acetone and 3.6g of N,N dimethylformamide, and stir at 55 degrees Celsius 3 hours, obtain spinning solution;

[0049] (2) The above-mentioned spinning solution is added in the syringe, and the needle is connected to a high-voltage power supply, the spinning voltage is set to 20kV, the spinning distance is 13 cm, and the flow rate of the spinning solution is 2mL / h; the obtained diameter is 750 Nano electrospun nanofibers are received by metal rollers, and electrospun nanofiber films are obtained after spinning for 1 hour;

[0050] (3) Annealing, polarization, cutting, and repolarization are performed on the obtained electrospun nanofiber film to obtain a nanofiber film filter material for high flow rate scenarios.

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Abstract

The present invention discloses a nano-fiber thin-membrane filter material preparation method and a product thereof. The method comprises the following steps: an organic piezoelectric material or an organic electrostatic adsorption material is used as a matrix material; the matrix material is mixed with an inorganic piezoelectric material or an electrostatic adsorption nano-material and a solvent;stirring at a preset temperature is used to dissolve the organic piezoelectric material or the organic electrostatic adsorption material, so that the inorganic piezoelectric material or electrostaticadsorption nano-material is uniformly dispersed to obtain a spinning solution having a viscosity; an electrostatic spinning method is used to obtain the spinning solution for spinning; a substrate isused to receive electrostatic-spun nano-fibers to form a nano-fiber thin membrane; and the nano-fiber thin membrane is subjected to annealing, polarizing, cutting, and material repolarizing to obtainthe nano-fiber thin-membrane filter material. Compared with traditional electrostatic adsorption materials, the nano-fiber thin-membrane filter material has stronger adsorption force on impurities and particles under high flow speed and high wind speed scenes, has better filtering effects, and is suitable for air purification, anti-fog masks, industrial exhaust gas, automobile exhaust gas treatment and other high-flow-speed scenes.

Description

technical field [0001] The invention belongs to the technical field of filter material preparation, and in particular relates to a preparation method and a product of a nanofiber membrane filter material for high flow rate and high wind speed scenarios. Background technique [0002] In recent years, with the rapid development of the national economy, the process of industrialization and urbanization has been accelerated, the excessive combustion of fossil energy, and the problem of air pollution has become increasingly serious. Excessive emission of industrial waste gas and automobile exhaust has caused the air quality to decline year by year, and frequent haze weather has seriously affected people's physical and mental health. The use of filter devices to treat industrial waste gas and automobile exhaust can improve air quality; wearing anti-haze masks in haze days can greatly reduce the amount of PM2.5 inhaled by the human body and protect human health. [0003] The tradi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D46/00B01D46/54D04H1/728
CPCB01D39/14B01D46/0032B01D46/0036B01D46/543B01D46/546D04H1/728
Inventor 周军林诗哲黄亮
Owner HUAZHONG UNIV OF SCI & TECH
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