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Electrostatic spinning film and preparation method and application thereof

A technology of electrospinning and hexafluoroisopropanol, which is applied in the direction of electrospinning, spinning solution preparation, textiles and papermaking, etc., and achieves the effects of simple preparation method, controllable process and various types

Inactive Publication Date: 2017-11-03
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among several materials, polyacrylonitrile spun fiber has the highest adsorption efficiency, but because it has not been approved by the FDA, the biocompatibility still needs further evaluation, so there are still problems in the application of mask filter membranes

Method used

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  • Electrostatic spinning film and preparation method and application thereof
  • Electrostatic spinning film and preparation method and application thereof
  • Electrostatic spinning film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In this embodiment, the haze protective electrospun membrane is prepared by the following method, which specifically includes the following steps:

[0049] 1. Dissolve 4.8 g of polylactic acid-glycolic acid in 60 mL of hexafluoroisopropanol solvent, and magnetically stir at room temperature for 12 hours to obtain a spinning solution with a polymer concentration of 8% (w / v).

[0050] 2. After the spinning solution was stirred at room temperature overnight, electrospinning was carried out. The stainless steel roller was used as the receiving device, the voltage was 25KV, the receiving distance was 20cm, the feeding rate of the spinning solution was 3.8mL / h, and the spinning time was 9 hours. The obtained thickness was A film of about 200 μm.

[0051] 3. Freeze the obtained fiber membrane at -20°C for 6 hours, and then vacuum-dry it for 72 hours to ensure that the residual solvent is fully volatilized.

[0052] Scanning electron microscope observation is carried out to th...

Embodiment 2

[0056] In this embodiment, the haze protective electrospun membrane is prepared by the following method, which specifically includes the following steps:

[0057] 1. Dissolve 4.8 g of polylactic acid-glycolic acid in 40 mL of hexafluoroisopropanol solvent, and magnetically stir at room temperature for 12 hours to obtain a spinning solution with a polymer concentration of 12% (w / v).

[0058] 2. The solution was electrospun, with a stainless steel roller as the receiving device, the voltage was 25KV, the receiving distance was 20cm, the spinning liquid inflow rate was 3.8mL / h, and the spinning was 6h. A film with a thickness of about 200 μm was obtained.

[0059] 3. Freeze the obtained electrospun membrane at -20°C for 6 hours, and then vacuum-dry it for 72 hours to ensure that the residual solvent is fully volatilized.

[0060] Scanning electron microscope observation is carried out to the electrospun filter membrane prepared in embodiment 2, the result is as follows figure 1...

Embodiment 3

[0064] In this embodiment, the haze protective electrospun membrane is prepared by the following method, which specifically includes the following steps:

[0065] 1. Dissolve 4.8 g of polylactic acid-glycolic acid in 30 mL of hexafluoroisopropanol solvent, and magnetically stir at room temperature for 12 hours to obtain a spinning solution with a polymer concentration of 16% (w / v).

[0066] 2. The solution was electrospun, with a stainless steel roller as the receiving device, the voltage was 25KV, the receiving distance was 20cm, the spinning liquid inflow rate was 3.8mL / h, and the spinning was 4.5h. A film with a thickness of about 200 μm was obtained.

[0067] 3. The obtained electrospun membrane was frozen at -20°C for 6 hours, and then vacuum-dried for 72 hours to ensure that the residual solvent was fully volatilized.

[0068] Scanning electron microscope observation is carried out to the electrostatic spinning filter membrane that embodiment 3 prepares, the result is a...

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Abstract

The invention relates to a preparation method and application for an electrostatic spinning film with the adsorption filtration property and different morphologies. The preparation method of the electrostatic spinning film comprises the steps that 1, polylactic acid-glycolic acid is dissolved into hexafluoroisopropanol solvent, the volume fraction ranges from 4 w / v% to 30 w / v%, and stirring is conducted to obtain a solution A; 2, the solvent A is stirred at room temperature and stays overnight, electrostatic spinning is conducted, and a film is obtained; 3, the obtained film is frozen and dried, vacuum drying is conducted, and the electrostatic spinning film is obtained. Accordingly, the film material is characterized in that the material is a multi-layer porous film material which is composed of fiber with the diameter ranging from 100 nm to 2,000 nm. The material is simple is preparation technology and can effectively protect against infestation of hazy weather, high filtration and protection properties are achieved, and the electrostatic spinning film can be widely used in the field of hazy protection products.

Description

technical field [0001] The invention belongs to the field of high polymer materials, and in particular relates to a smog protective film material with polylactic acid-glycolic acid as the main matrix material and its preparation method and application. Background technique [0002] With the rapid economic growth and global industrialization, pollution, especially air pollution, has become one of the most serious threats facing mankind. In fact, air pollutants are very complex and can be particles, liquid droplets, gases or a mixture of the above. Among solid pollutants (particulate matter, dust, pollen, etc.), PM is one of the most dangerous, with potentially serious implications for public health, air quality and climate. Particles with an aerodynamic diameter of less than 2.5 μm (PM 2.5) and 10 μm (PM 10) can penetrate the respiratory system. Therefore, long-term exposure to particulate matter can cause many health problems, especially some lung and bronchial related dis...

Claims

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Application Information

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IPC IPC(8): D04H1/435D04H1/728D01D1/02D01D5/00A62B7/10A62B9/06B01D67/00B01D71/74
CPCD04H1/435A62B7/10A62B9/06B01D67/0002B01D71/74B01D2323/39D01D1/02D01D5/003D01D5/0061D01D5/0092D04H1/728
Inventor 陈春英刘颖许文师郭梦雨
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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