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Method for preparing nanofiber membrane through electrostatic spinning

A nanofiber membrane and electrospinning technology, which is applied in the direction of electrospinning, fiber treatment, chemical instruments and methods, etc., can solve the problems of inability to accurately control the multi-level structure of nanometer membranes, and cannot guarantee the preparation of nanofiber membranes, so as to promote The effect of developing applications

Inactive Publication Date: 2015-06-17
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pressure drop reaches about 450 Pa, and this method cannot accurately control the multi-level structure of the nano-membrane, so it cannot guarantee the preparation of high-efficiency and low-resistance nanofibrous membranes.

Method used

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  • Method for preparing nanofiber membrane through electrostatic spinning
  • Method for preparing nanofiber membrane through electrostatic spinning
  • Method for preparing nanofiber membrane through electrostatic spinning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Dissolve 1.4g of polyacrylonitrile in 8.6g of N,N-dimethylformamide, stir for 8h until completely dissolved, and obtain polyacrylonitrile / N,N-dimethylformamide with a concentration of 14% (g / g). Formamide spinning solution. Use a 10ml syringe and a needle with an inner diameter of 0.5mm to draw out the polyacrylonitrile / N,N-dimethylformamide spinning solution, and fix it on a micro-syringe pump. through as figure 1 The electrospinning device shown is used for electrospinning, and the parameters are: voltage 12KV, receiving distance 20cm, injection rate 0.6ml / h, ambient temperature 25°C, and ambient relative humidity 55%.

[0045] A cut plexiglass plate with a protrusion length × width × height of 8 mm × 8 mm × 8 mm, and a distance between the front and rear of the protrusions of 3 mm × 3 mm is used, and an iron wire is added in the gap as a receiving device to prepare a nanofiber film with a sparse structure. Nano-membrane with high filtration efficiency, low filtrat...

Embodiment 2

[0047] Dissolve 1.2 g of polyacrylonitrile in 8.8 g of N,N-dimethylformamide, stir for 8 hours until completely dissolved, and obtain polyacrylonitrile / N,N-dimethylformamide with a concentration of 12% (g / g). Formamide spinning solution. Use a 10ml syringe and a needle with an inner diameter of 0.5mm to draw out the polyacrylonitrile / N,N-dimethylformamide spinning solution, and fix it on a micro-syringe pump. through as figure 1 The electrospinning device shown is used for electrospinning, and the parameters are: voltage 12KV, receiving distance 20cm, injection rate 0.6ml / h, ambient temperature 25°C, and ambient relative humidity 55%.

[0048] A foam packaging material thickened yarn with a raised diameter and height of 10mm×2mm and a distance between the front and back of the raised 1mm×1mm is used as a receiving device to prepare a nanofiber membrane with a sparse structure and high filtration efficiency. Nano-membrane with good filter resistance and air permeability. Ta...

Embodiment 3

[0050] Dissolve 1.4g of polyvinylidene fluoride in 8.6g of N,N-dimethylformamide, stir for 8h until completely dissolved, and obtain a concentration of 14% (g / g) of polyvinylidene fluoride / N,N-dimethylformamide Methylformamide spinning solution. Use a 10ml syringe and a needle with an inner diameter of 0.5mm to draw out the polyvinylidene fluoride / N,N-dimethylformamide spinning solution, and fix it on a micro-syringe pump. through as figure 1 The electrospinning device shown is used for electrospinning, and the parameters are: voltage 12KV, receiving distance 20cm, injection rate 0.6ml / h, ambient temperature 25°C, and ambient relative humidity 55%.

[0051] A foam packaging material with a diameter and height of 10mm×2mm and a distance of 1mm×1mm between the protrusions and a fine yarn is used as the receiving device to prepare a nanofiber membrane with a sparse structure and high filtration efficiency. Nano-membrane with good filter resistance and air permeability. Table ...

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Abstract

The invention relates to a method for preparing a nanofiber membrane through electrostatic spinning. High-molecular polymer is dissolved in solvent to be stirred till an even solution is obtained; the spinning solution is used for electrostatic spinning, and the nanofiber membrane of a sparse structure can be obtained. The preparing method is convenient and fast to conduct, due to the fact that the obtained nanofiber membrane is of the unique sparse structure, the filtering resistance of the nanofiber membrane is lowered greatly, the influence on the filtering efficiency of the nanofiber membrane is very low and the method has very good application prospects in the filtering field, especially in the air filtering field.

Description

technical field [0001] The invention belongs to the field of preparation of filter membrane materials, in particular to a method for preparing nanofiber membranes by electrospinning. Background technique [0002] In recent years, the problem of air pollution has been serious and has spread to major cities in my country, such as PM2.5, commonly known as "smog". PM2.5 has a small particle size and is rich in a large amount of toxic and harmful substances, which has a great impact on human health and environmental quality. In order to achieve a high degree of cleanliness in the environment, the most effective method is filtration. The diameter of electrospun nanofibers is between submicron and nanometer, which has the advantages of large specific surface area, high porosity, and simple preparation process. The uniform nanomembrane of a certain thickness has quickly attracted people's attention and is very popular because of its high filtration efficiency. Quickly applied to f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00B01D71/42B01D71/58B01D71/28B01D71/34B01D71/74B01D71/26B01D67/00
CPCD04H1/728B01D67/00B01D71/26B01D71/28B01D71/34B01D71/42B01D71/58B01D71/74D01D5/0007D01D5/0015
Inventor 覃小红娄莉华张弘楠
Owner DONGHUA UNIV
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