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Multi-combination functional electrostatic spinning sub-micron fiber air filtering material and preparation thereof

An air filter material and sub-micron technology, applied in electrospinning, filtration separation, fiber treatment, etc., can solve the problems of cumbersome preparation process, single structure, and low production output, and achieve uniform thickness, improved precision, and large porosity Effect

Active Publication Date: 2021-05-07
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a multi-combination functional electrospun submicron fiber air filter material and its preparation method, to overcome the single structure and preparation method of the submicron fiber layer of the electrospun submicron fiber filter material in the prior art The defects of cumbersome process and low production yield

Method used

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  • Multi-combination functional electrostatic spinning sub-micron fiber air filtering material and preparation thereof
  • Multi-combination functional electrostatic spinning sub-micron fiber air filtering material and preparation thereof

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Effect test

Embodiment 1

[0038] This embodiment provides a multi-combination functional electrospun submicron fiber air filter material, which is a "sandwich" structure in which spunbond nonwovens, submicron fiber composite membranes, and spunbond nonwovens are arranged in sequence, and the submicron The fiber membrane is a composite membrane of gradient structure electrospun submicron fiber membrane and electrostatic spraying micron balls. / Fine electrospun submicron fiber layer is used as the upper and lower layers; the electrostatic spray microsphere layer is a small ball with a diameter of micron as the middle layer, forming a three-dimensional structure. Among them, the fiber diameters of the electrospun submicron fiber thick / fine layers are 100-200nm (fine fiber layer), 300-400nm (coarse fiber layer), the ball diameter of the microsphere layer is 0.7-1.2 μm, and the gram of the gradient composite membrane Weight ~2g m -2 . The spunbonded nonwoven fabric used has a fiber diameter of 15 μm and a...

Embodiment 2

[0048] This embodiment provides a multi-combination functional electrospun submicron fiber air filter material, according to embodiment 1, the fiber diameter of each layer of electrospun submicron fiber thick / fine is 150-270nm (fine fiber layer), 350-480nm (coarse fiber layer), the ball diameter of the microsphere layer is 1.0-2.0μm, and the grammage of the gradient composite membrane is ~3g m -2 , all the other are identical with embodiment 1.

[0049] The batch preparation method of above-mentioned filter material, concrete steps are:

[0050] Step 1: Place the polyacrylonitrile powder in a vacuum drying oven and dry it under vacuum at 60°C for 6 hours;

[0051] Step 2: Dissolve the dried polyacrylonitrile powder in N,N-dimethylformamide solvent, heat and electric stir in a water bath for 4 hours, the temperature is 70°C, and the mass fractions are respectively 5wt%, 12wt%, and 16wt%. High and low concentration solutions of polyacrylonitrile.

[0052] The third step: add ...

Embodiment 3

[0057] The present embodiment provides a multi-combination functional electrospun submicron fiber air filter material, according to embodiment 1, the fiber diameter of each layer of electrospun submicron fiber thick / fine is 250-320nm (fine fiber layer), 380-550nm (coarse fiber layer), the ball diameter of the microsphere layer is 1.5-2.5 μm, and the gram weight of the gradient composite membrane is ~4g m -2 , all the other are identical with embodiment 1.

[0058] The batch preparation method of above-mentioned filter material, concrete steps are:

[0059] Step 1: Place the polyacrylonitrile powder in a vacuum drying oven, and dry it under vacuum at 60° C. for 6 hours.

[0060] Step 2: Dissolve the dried polyacrylonitrile powder in N,N-dimethylformamide solvent, heat and electric stir in a water bath for 4 hours, the temperature is 70°C, and the mass fractions are 7wt%, 14wt%, and 18wt% respectively High and low concentration solutions of polyacrylonitrile.

[0061] The thi...

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Abstract

The invention relates to a multi-combination functional electrostatic spinning sub-micron fiber air filtering material and preparation thereof. The material is of a sandwich structure formed by sequentially arranging a spun-bonded non-woven fabric, a sub-micron fiber / microsphere composite film and a spun-bonded non-woven fabric. The preparation method comprises the following steps: preparing a low-concentration electrostatic spinning solution with additional functionality, preparing a high-concentration electrostatic spinning solution with additional functionality, preparing an electrostatic spraying polymer solution with additional functionality, preparing a sub-micron fiber composite membrane / non-woven fabric composite material, and preparing the sub-micron fiber air filtering material. The preparation method has simple and controllable process parameters, and the prepared filter material has good structural controllability.

Description

technical field [0001] The invention belongs to the field of air filter materials and preparation thereof, in particular to a multi-combination functional electrostatic spinning submicron fiber air filter material and a preparation method thereof. Background technique [0002] With the gradual deepening of urbanization and industrialization and the rapid economic development, the global air pollution problem is becoming more and more serious, especially in developing countries in recent years, the continuous occurrence of haze weather, the main source of pollution PM 2.5 (Particles with a particle size less than 2.5 μm) can float in the air for a long time because of their small particle size, and carry bacteria, viruses, heavy metals and other substances into the lungs of the human body, increasing the incidence of respiratory diseases and heart diseases, and seriously endangering the human body healthy. Filtration as a protective measure can effectively resist the adverse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/08B01D39/14B01D39/16D01D5/00D04H1/4382D04H1/728
CPCB01D39/14B01D39/08B01D39/083B01D39/1623D04H1/4382D04H1/728D01D5/003D01D5/0061D01D5/0092B01D2239/0618B01D2239/065B01D2239/0631B01D2239/0442Y02A50/2351
Inventor 王荣武周梦娟张弘楠覃小红熊键
Owner DONGHUA UNIV
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