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An electrospun membrane with adsorption and filtration function and its preparation method and application

An electrospinning and spinning technology, which is applied in the field of smog protective film materials and its preparation, can solve the problems of low adsorption rate and poor air permeability, and achieve the effects of long storage period, low cost and controllable process

Active Publication Date: 2020-12-01
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

[0004] However, when the existing electrospun nanofibers are applied to PM2.5 protective products, there are still some defects, such as low adsorption rate and poor air permeability.

Method used

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  • An electrospun membrane with adsorption and filtration function and its preparation method and application
  • An electrospun membrane with adsorption and filtration function and its preparation method and application
  • An electrospun membrane with adsorption and filtration function and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0047] In this embodiment, the haze protective electrospun membrane is prepared by the following method, which specifically includes the following steps:

[0048] 1. Dissolve 2.2g polylactic acid-glycolic acid in 20mL hexafluoroisopropanol solvent, stir magnetically at room temperature for 12h, and obtain a spinning solution with a polymer concentration of 11% (w / v), wherein polylactic acid-glycolic acid and The mass ratio of polycaprolactone is 1:0.

[0049] 2. The solution was electrospun, with a stainless steel roller as the receiving device, the voltage was 20KV, the receiving distance was 20cm, the spinning liquid inflow rate was 10mL / h, and the spinning was 5h. A film with a thickness of about 250 μm was obtained.

[0050] 3. Freeze-dry the obtained fiber film in a refrigerator for 8 hours, and then dry it in a vacuum oven for 72 hours to ensure that the residual solvent is fully volatilized.

[0051] Scanning electron microscope observation is carried out to the elect...

Embodiment 2

[0055] In this embodiment, the haze protective electrospun membrane is prepared by the following method, which specifically includes the following steps:

[0056] 1. Dissolve 3.85g polylactic acid-glycolic acid and 1.65g polycaprolactone in 50ml hexafluoroisopropanol solvent, stir magnetically at room temperature for 12h to obtain a spinning solution with a polymer concentration of 11% (w / v), The mass ratio of polylactic acid-glycolic acid to polycaprolactone is 7:3.

[0057] 2. The solution was electrospun, with a stainless steel flat table as the receiving device, the voltage was 20KV, the receiving distance was 20cm, the spinning liquid inflow rate was 10mL / h, and the spinning was 5h. A film with a thickness of about 250 μm was obtained.

[0058] 3. Freeze-dry the obtained fiber film in a refrigerator for 8 hours, and then dry it in a vacuum oven for 72 hours to ensure that the residual solvent is fully volatilized.

[0059] Scanning electron microscope observation is car...

Embodiment 3

[0063] In this embodiment, the haze protective electrospun membrane is prepared by the following method, which specifically includes the following steps:

[0064] 1. Dissolve 3.3g polylactic acid-glycolic acid and 2.2g polycaprolactone in 50mL hexafluoroisopropanol solvent, stir magnetically at room temperature for 12h, and obtain a spinning solution with a polymer concentration of 11% (w / v), The mass ratio of polylactic acid-glycolic acid to polycaprolactone is 6:4.

[0065] 2. The solution was electrospun, with a stainless steel flat table as the receiving device, the voltage was 20KV, the receiving distance was 20cm, the spinning liquid inflow rate was 10mL / h, and the spinning was 5h. A film with a thickness of about 250 μm was obtained.

[0066] 3. Freeze-dry the obtained fiber film in a refrigerator for 8 hours, and then dry it in a vacuum oven for 72 hours to ensure that the residual solvent is fully volatilized.

[0067] Scanning electron microscope observation is car...

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Abstract

The invention relates to an electrospinning membrane with adsorption and filtration function and a preparation method and applications thereof The preparation method of the electrospinning membrane comprises following steps: (1) polylactide-glycolic acid and / or polycaprolactone are dissolved in hexafluoroisopropanol solvent and stirring is performed to obtain a solution A; (2) after the solution A is stirred at room temperature overnight, electrospinning is performed with the above solution A to obtain membrane; (3) freeze drying and vacuum drying are performed on the obtained membrane. The membrane material of the invention is characterized in that the material is a multi-layer and porous membrane material formed by fiber having the diameter range from 400 to 900nm. The preparation process is simple; the membrane can be used for effectively preventing infestation of haze; the membrane has high filter and protecting performance and can be widely used in the field of haze protection products.

Description

technical field [0001] The invention belongs to the field of biological materials, and in particular relates to a smog protective film material with polylactic acid-glycolic acid and polycaprolactone as main matrix materials, a preparation method and application thereof. Background technique [0002] Haze weather is a kind of disaster weather phenomenon, which affects a wide area and seriously reduces the air quality of cities. Particulate matter is the main air pollutant in smog, among which fine particulate matter (PM2.5) with an aerodynamic diameter of ≤2.5 μm is most closely related to human health. Therefore, in the monitoring of haze pollution, the PM2.5 concentration index is often used to measure the severity of pollution. For public health considerations, the Ministry of Health and other relevant departments recommend that the public should wear appropriate personal protective products, such as masks, mouth and nose masks, etc., when going out in foggy weather. As...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D01D5/00D04H1/55B01D46/54D01F6/84D01F8/14D06C7/00
CPCB01D46/543D01D5/003D01D5/0069D01D5/0076D01D5/0092D01F6/84D01F8/14D04H1/55D04H1/728D06C7/00
Inventor 陈春英刘颖郭梦雨许文师
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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