PVDF nano fiber multifunctional air filtering material and preparation method thereof

An air filter material and nanofiber technology, applied in the field of filter materials, can solve problems such as single function, reduced filter performance, and defective filter efficiency, and achieve the effect of simple preparation and improved temperature resistance

Active Publication Date: 2015-07-22
SOOCHOW BOYOO NANO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many nano-filter materials, which have a single function and a relatively limited scope of application. Many filter materials have high resistance to airflow. Secondly, various antibacterial filter materials contain metal-containing inhibitors such as nano-scale silver ions. Bacterial agents, according to the latest research, metal nanopowder is an inhalable carcinogen, and its use has been restricted in many countries in Europe and the United States; there are also nanofiber filter materials that are produced with high-boiling solvents at the same time, and the result is high-boiling The solvent cannot be completely volatilized, and the nanofiber membrane made contains residual solvent, which will cause harm to the human body, and the fiber membrane made according to the patented technology has no antibacterial effect; the

Method used

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  • PVDF nano fiber multifunctional air filtering material and preparation method thereof
  • PVDF nano fiber multifunctional air filtering material and preparation method thereof
  • PVDF nano fiber multifunctional air filtering material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] refer to figure 1 and figure 2 Shown, a kind of PVDF nanofiber multifunctional air filter material, comprise one deck polypropylene microfiber layer 1 and one deck PVDF nanofiber layer 2, PVDF nanofiber is made by spinning solution, and spinning solution comprises the PVDF resin of 1kg , 9kg of mixed solvent, the mixed solvent includes 4.5kg of amide solvent and 4.5kg of ketone, the amide solvent is N,N-dimethylformamide, and the ketone is butanone. PVDF nanofibers also include 0.01kg of tetrabutylammonium perchlorate, which is used to increase the conductivity of the solution and increase the degree of fiber splitting during electrospinning, thereby obtaining finer nanofibers , which can ensure the complete volatilization of the solvent in the spinning solution; the tetrabutyl ammonium perchlorate salt contained in the formed PVDF nanofiber layer can increase the amount of static charge of the PVDF fiber, making the PVDF nanofiber layer also become an electret , to ...

Embodiment 2

[0045] The difference between embodiment two and embodiment one is that the spinning solution includes 1kg of PVDF resin and 13kg of mixed solvent, the mixed solvent includes 10kg of amide solvent and 3kg of ketone, and the amide solvent is N,N-dimethylethyl Amide, ketone is acetone. PVDF nanofibers also include 0.007kg of tetrabutylammonium perchlorate

[0046] The fiber diameter of the polypropylene micron fiber layer is 1 micron, the temperature of the high-temperature calender roll is 40°C, and the pressure is 1000N / ㎡, the temperature of the low-temperature calender roll is 30°C, and the pressure is 1000N / ㎡. The flow rate of the silk needle is 0.1ml / h, and the spinning voltage of the electrospinning device is 20kv.

[0047] The finished product obtained in this embodiment has a filtration efficiency of more than 90% for 0.075 micron sodium chloride aerosol, a pressure drop resistance of less than 100 Pa, and a bacteriostasis rate of more than 80% for Escherichia coli.

Embodiment 3

[0049] The difference between Embodiment 3 and Embodiment 1 is that the fiber diameter of the polypropylene micron fiber layer is 3 microns, the temperature of the high-temperature calender roll is 80°C, and the pressure is 5000N / ㎡, the temperature of the low-temperature calender roll is 60°C, and the pressure The flow rate of the spinning needle of the electrospinning device is 0.5ml / h, and the spinning voltage of the electrospinning device is 60kv.

[0050] The finished product obtained in this embodiment has a filtration efficiency of more than 90% for 0.075 micron sodium chloride aerosol, a pressure drop resistance of less than 100 Pa, and a bacteriostasis rate of more than 80% for Escherichia coli.

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Abstract

The invention discloses a PVDF nano fiber multifunctional air filtering material which comprises a polypropylene micrometer fiber layer and a PVDF nano fiber layer, wherein the PVDF nano fiber is prepared from a spinning solution; the spinning solution comprises the following components in parts by weight: 1 part of PVDF resin and 9-13 parts of a mixed solvent; the mixed solvent comprises an amide solvent and ketone; the preparation method for the material comprises the following steps: 1) adopting the polypropylene micrometer fiber layer as a substrate; 2) stirring and mixing the PVDF resin, the mixed solvent and tetrabutyl ammonium perchlorate, and adding the obtained spinning solution into an electrostatic spinning device; 3) performing bowl hot-pressing on the substrate through a high-temperature calender, and feeding into the electrostatic spinning device for spraying; 4) obtaining a finished product after the spraying is completed. The PVDF nano fiber multifunctional air filtering material can effectively inhibit growth of bacteria, can greatly reduce the content of oily granules and ionic granules, and is long in service life and high in production efficiency.

Description

technical field [0001] The invention relates to the field of filter materials, in particular to a PVDF nanofiber multifunctional air filter material and a preparation method thereof. Background technique [0002] At present, the global environment is deteriorating day by day, especially the air environment that is closely related to human beings, which has seriously endangered human health. At the same time, some key parts of modern high-tech have extremely high requirements for environmental purification. Therefore, modern society has a great demand for air filter materials with the advantages of high efficiency, low resistance, and antibacterial, and technologies such as nanofibers, glass fibers, and electrets have been widely used. [0003] There are many nano-filter materials, which have a single function and a relatively limited scope of application. Many filter materials have high resistance to airflow. Secondly, various antibacterial filter materials contain metal-co...

Claims

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Application Information

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IPC IPC(8): B01D39/16B32B27/08
Inventor 夏建华董祥徐卫红
Owner SOOCHOW BOYOO NANO TECH CO LTD
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