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Electrostatic spinning anti-haze compound fiber filter disc and preparation method thereof

A composite fiber, anti-fog technology, applied in fiber processing, separation methods, chemical instruments and methods, etc., to achieve the effects of low cost, strong optimizability, and simple process

Inactive Publication Date: 2019-04-09
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The strong resource advantages and special functions of natural materials and their polymers have prompted researchers to devote themselves to the research and development of food-grade air filter materials, but compared with synthetic polymers, the use of natural polymer biomaterials to prepare purification filter membranes through electrospinning technology Therefore, the development of a pure natural, safe, non-toxic, economical and practical high-efficiency filter membrane will be of great significance to the development of the anti-fog mask market.

Method used

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  • Electrostatic spinning anti-haze compound fiber filter disc and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: An electrospun anti-smog composite fiber filter and its preparation method

[0028] Cellulose acetate microlayer preparation:

[0029] Spinning solution preparation: use cellulose acetate as raw material, dissolve it in formic acid and stir to prepare cellulose acetate sol with a mass fraction of 10%. After mixing, the solution was homogenized for 5 minutes and filtered with an organic filter membrane with a pore size of 0.45 µm to obtain a uniform spinning solution.

[0030] The basic device of electrospinning consists of five parts: high-voltage electrostatic generator, micropump (syringe pump), syringe, needle and collection device. The basic principle is that in the high-voltage electrostatic field, the charged polymer solution or melt is stretched by the electric field force. With the increase of the electric field strength, when the electric field force on the polymer solution or melt is greater than its surface tension, A fine jet will form. During ...

Embodiment 2

[0041] Example 2: An electrospun anti-smog composite fiber filter and its preparation method

[0042] The invention uses natural protein, polysaccharide, etc. as raw materials, and adopts electrospinning technology to manufacture a composite filter sheet of an anti-smog mask that integrates filtration, interception and adsorption.

[0043] Due to the small pore size and high filtration resistance of the nano-scale natural polymer filter membrane, but the membrane made of pure protein has the defect of insufficient strength, in order to maintain a high filtration efficiency on the basis of reducing the filtration resistance, a kind of Composite fiber filter membrane combining thick and thin fibers.

[0044] The invention is a composite filter made of three layers of natural materials. The sequence of "micron layer-nano layer-micron layer" is used to prepare the composite membrane. At the same time, polysaccharides can be added to the protein to improve the strength and viscosit...

Embodiment 3

[0067] Example 3: An electrospun anti-smog composite fiber filter and its preparation method

[0068] (1) Preparation of cellulose acetate micron layer:

[0069] Spinning solution preparation: use cellulose acetate as raw material, dissolve it in anhydrous acetic acid to prepare cellulose acetate sol with a mass fraction of 8%. Stir continuously and homogenize the solution for 5 minutes, and obtain a uniform spinning solution after filtering through an organic filter with a pore size of 0.45 µm.

[0070] Parameters: flow rate 0.5mL / h, voltage 20kV, needle distance from receiving device 25cm, control spinning temperature at 20±5℃, humidity at 40±10%.

[0071] (2) Preparation of wheat protein-sodium alginate nanolayer:

[0072] Preparation of spinning solution: Wheat protein and sodium alginate are used as raw materials, and the two are dissolved in 70% ethanol solution at a ratio of 4:1, and the total concentration of the prepared solute is 10%. The above solution was stirre...

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Abstract

The invention discloses an electrostatic spinning anti-haze compound fiber filter disc and a preparation method thereof, and in particular relates to a method of preparing an anti-haze mask compound filter disc. The electrostatic spinning anti-haze compound fiber filter disc comprises a first micron layer, a nano layer and a second micron layer laminated successively. The preparation method comprises the following steps: electrostatically spinning the nano layer to prepare first high molecular fibers from a nano raw material; then forming a nanoscale fiber film of a porous structure by staggering the first high molecular fibers; electrostatically spinning the first and second micron layers to prepare second high molecular fibers from a micron raw material; and then forming the micron-orderfiber film of the porous structure by staggering the second high molecular fibers. By selecting natural proteins and polysaccharide as primary raw materials, the micron layer-nano layer-micron layercompound filter disc is prepared by means of the electrostatic spinning technology. The product can filter and intercept inhalable particles in haze effectively.

Description

technical field [0001] The invention relates to the preparation of a natural polymer biological filter membrane, in particular to an electrospun anti-smog composite fiber filter and a preparation method thereof. Background technique [0002] Haze is a general term for fog and haze. Among them, fog is formed by fine water droplets suspended in the air formed by the condensation of water vapor. It is a normal weather phenomenon, while haze is essentially a kind of dust particles caused by the air There is a problem of air pollution caused by the suspension of a large number of solid particles. Studies have shown that high concentrations of fine particulate matter (referring to particulate matter with an aerodynamic equivalent diameter of less than or equal to 2.5 µm in ambient air, referred to as PM2.5) or aerosol pollution are the root causes of smog. Because PM 2.5 is easy to carry all kinds of harmful bacteria, it will deposit a relatively large amount in the respiratory s...

Claims

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Application Information

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IPC IPC(8): B01D39/16D01D5/00
CPCB01D39/1615B01D2239/0266D01D5/0069
Inventor 何述栋杨豫斐孙先保孙汉巨操小栋叶永康封杏岚徐瀹澄沈继云黄程青
Owner HEFEI UNIV OF TECH