Electret nanofiber high-efficiency filter material and preparation method thereof

A high-efficiency filtration and nanofiber technology, applied in separation methods, filtration separation, fiber treatment, etc., can solve the problems of unstable electret performance and low filtration efficiency of fine particles, and achieve low production costs, good air permeability, The effect of improving interception efficiency

Active Publication Date: 2022-06-14
XIAMEN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency electret nanofiber filter material and its preparation method to solve the problem of unstable electret performance of the electret nanofiber filter material in the prior art, resulting in low filtration efficiency of fine particles in the air. technical problem

Method used

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  • Electret nanofiber high-efficiency filter material and preparation method thereof

Examples

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Embodiment 1

[0034] Example 1 of the present embodiment provides an electret nanofiber high efficiency filter material in a preferred embodiment, which is prepared by a spinning liquid loaded on a PP meltblown nonwoven support material by electrospinning method. Wherein, the spinning liquid in this embodiment comprises the following components by weight:

[0035] 8 parts polyacrylonitrile (PAN);

[0036] 8 parts linear polarizable polybenzoate containing azo side groups; and

[0037] 84 parts N, N-dimethylformamide solvent.

[0038] The present embodiment 1 also provides a method for preparing the above material, as follows:

[0039] (1) Weigh 8 parts of polyacrylonitrile (PAN) and 8 parts of linear polarizable polybenzoate containing azo side groups added to a container containing 84 parts of N, N-dimethylformamide solvent, placed in a 60 ° C water bath heated and stirred until dissolved, configured into a uniform transparent solution (i.e., spinning liquid).

[0040](2) Set the electrospinni...

Embodiment 2

[0053] Example 2 of the present embodiment provides another preferred embodiment of a station pole nanofiber efficient filter material, which is prepared by a spinning liquid loaded on a PP spunbond nonwoven support material. The embodiment of the spinning liquid comprises the following components by weight:

[0054] 15 parts polystyrene (PS);

[0055] 15 parts linearly polarizable polystyrene containing azobenzene side groups; and

[0056] 70 parts N, N-dimethylacetamide solvent.

[0057] The present embodiment also provides a method for preparing the above material, as follows:

[0058] (1) Weigh 15 parts of polystyrene (PS) and 15 parts of linear polarizable polystyrene containing azobenzene side group added to a container containing 70 parts of N, N- dimethylacetamide solvent, placed in a 60 ° C water bath heating and stirring until dissolved, configured into a uniform and transparent spinning liquid.

[0059] (2) Set the electrospinning process parameters: the flow rate is 2m...

Embodiment 3

[0070]The present embodiment provides another preferred embodiment of the electret nanofiber efficient filter material, which is prepared by the spinning liquid load on the PP meltblown non-woven fabric support material, the spinning liquid comprises the following components by weight:

[0071] 10 parts polymethyl methacrylate (PMMA);

[0072] 15 parts linearly polarizable polymethyl methacrylate containing azobenzene lateral group; and

[0073] 75 parts N,N-dimethylformamide solvent.

[0074] The present embodiment also provides a method for preparing the above material, as follows:

[0075] (1) Weigh 10 parts of polymethyl methacrylate (PMMA) and 15 parts of linearly polarizable polymethyl methacrylate containing azo benzene side group added to a container containing 75 parts of N, N- dimethylformamide solvent, placed in a 60 ° C water bath heating and stirring until dissolved, configured into a uniform transparent solution (i.e., spinning liquid).

[0076] (2) Set the electrosp...

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Abstract

The invention provides an electret nanofiber high-efficiency filter material and a preparation method thereof, which belong to the technical field of new materials, and solve the problem that the electret performance of the electret nanofiber filter material in the prior art is not stable, which leads to fine particles in the air. The technical problem of low particle filtration efficiency. The filter material is prepared by electrospinning a spinning solution, wherein the spinning solution includes the following components by weight: 0-30 parts of a polymer; 1-30 parts of a linear polarizable polymer; and 40-99 parts of solvent; wherein, the linear polarizable polymer is a linear polarizable polymer having a dipole structure side group of an electron donor-π conjugated system-electron acceptor. In the present invention, the linear polarizable polymer is dissolved together with the polymer, and the electrospinning technique is used to prepare a 2.5 The air filter material with filtering performance, low resistance pressure drop and maintaining ideal performance stability has the advantages of simple preparation method and low production cost.

Description

Technical field [0001] The present invention relates to the field of new material technology, in particular to a station nanofiber efficient filter material and a preparation method thereof. Background [0002] Fine particulate matter in the air refers to particulate matter with an aerodynamic equivalent diameter of less than or equal to 2.5 microns in the environment, also known as fine particles, fine particles or PM 2.5 Its particle size is small, the residence time in the atmosphere is long, the transport distance is long, it can cause great harm to human health, and it is easy to cause pneumonia, lung function decline and other diseases. Air filter materials prepared from meltblown, glass and spunbond fibers are an effective measure to protect fine particles in the air. [0003] At present, the filtration mechanism of traditional air filtration materials for fine particles in the air mainly has the following five types: interception effect, sieve effect, inertia effect, Brow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/08B01D46/30B03C3/017D01F8/08D01F8/10D04H1/728D01D5/00
CPCB01D39/086B01D46/30B01D46/0032D01F8/08D01F8/10D04H1/728D01D5/003D01D5/0076B01D2239/025B01D2239/0407B01D2239/0435B01D2239/0631
Inventor 谢建达邢家思吴晓舜
Owner XIAMEN UNIV OF TECH
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