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High-efficiency protective mask based on full-fiber electret generator and preparation method thereof

An electret and generator technology, which is used in life-saving equipment, respiratory protection devices, respiratory protection containers, etc., can solve the problems affecting the filtration stability and service life of mask materials, poor wear resistance and poor flexibility of friction materials, etc. , to achieve good flexibility, ensure stability, and good air permeability

Active Publication Date: 2020-06-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The disadvantages of the above technology are: the flexibility of metal electrode materials such as copper mesh is poor, and cracks and fractures are prone to occur in the process of continuous bending; and the friction material obtained by surface nano-modification has poor wear resistance, which directly affects Filtration stability and service life of mask materials

Method used

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  • High-efficiency protective mask based on full-fiber electret generator and preparation method thereof
  • High-efficiency protective mask based on full-fiber electret generator and preparation method thereof
  • High-efficiency protective mask based on full-fiber electret generator and preparation method thereof

Examples

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Effect test

Embodiment 1

[0042] A high-efficiency protective mask based on an all-fiber electret generator of the present embodiment and a preparation method thereof, the specific steps are:

[0043](1) Accurately weigh 16.2 g of N-N dimethylformamide and 10.8 g of acetone in a 50 mL beaker with an electronic balance, then weigh 0.05 g of nano-silicon dioxide (purity 99.5%, average particle size 20 nm) in In the above mixed solvent, then use an electronic balance to accurately weigh 3.0 g of polyvinylidene fluoride and place it in the above beaker, add a stirrer, and stir for 8 h with a magnetic stirrer at 60 °C, with a stirring power of 200 W, and configure it to be uniform and stable. spinning solution.

[0044] (2) Draw polyvinylidene fluoride spinning solution with a syringe, use figure 1 The electrospinning equipment shown (composed of voltage protection system 1, drum receiving control system 2, spinning solution injection system 3 and high-voltage electrostatic system 4, the same below) perfor...

Embodiment 2

[0051] A high-efficiency protective mask based on an all-fiber electret generator of the present embodiment and a preparation method thereof, the specific steps are:

[0052] (1) Accurately weigh 16.2 g of N-N dimethylformamide and 10.8 g of acetone in a 50 mL beaker with an electronic balance, then weigh 0.03 g of nano-silicon nitride (purity 99.5%, average particle size 30 nm) in In the above mixed solvent, then use an electronic balance to accurately weigh 3.6 g of polyvinylidene fluoride and place it in the above beaker, add a stirrer, and stir for 8 h at 80°C with a magnetic stirrer, with a stirring power of 300 W, and configure it to be uniform and stable. spinning solution.

[0053] (2) Draw polyvinylidene fluoride spinning solution with a syringe, use figure 1 The electrospinning equipment shown is used for electrospinning, and the non-woven fabric is used as the receiving substrate, and the electrospinning parameters are adjusted: the electrostatic high voltage is 20...

Embodiment 3

[0060] A high-efficiency protective mask based on an all-fiber electret generator of the present embodiment and a preparation method thereof, the specific steps are:

[0061] (1) Accurately weigh 30 g of dichloromethane with an electronic balance and place it in a 50 mL beaker, then weigh 0.03 g of nano-zinc oxide (average particle size 30 nm) and place it in the above solvent, and then accurately weigh 2.4 g of dichloromethane with an electronic balance. g polycarbonate was placed in the above-mentioned beaker, and ultrasonically vibrated at 60°C for 6 h with an ultrasonic power of 200 W to form a uniform and stable spinning solution.

[0062] (2) Draw the polycarbonate spinning solution with a syringe, use figure 1 The electrospinning equipment shown is used for electrospinning, and the non-woven fabric is used as the receiving substrate, and the electrospinning parameters are adjusted: the electrostatic high voltage is 25 KV, the receiving distance is 12 cm, the injection s...

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Abstract

The invention discloses a high-efficiency protective mask based on a full-fiber electret generator and a preparation method thereof. The high-efficiency protective mask based on the full-fiber electret generator comprises a tightening belt, a silicone mold, a full-fiber electret generator arranged in the silicone mold and a breathing valve. The full-fiber electret generator comprises a filtering layer and a sliding fixed pillar arranged on the filtering layer; the filtering layer comprises a silicone film, a conductive fabric, an electret fiber film and a non-woven fabric which are stacked insequence; and the conductive fabric and the electret fiber film have different electronegativities and are driven by spontaneous breathing so as to produce 200- 1000V of electrostatic pressure. According to the invention, the protective mask based on the full-fiber electret generator has a filtering efficiency greater than or equal to 98% for PM2.5, a filtering efficiency greater than or equal to1.0% for PM1.0, and the filtering pressure drop is 20- 50 Pa, and with good flexibility and breathability, simple preparation process, the protective mask has wide application prospect in the field ofpersonal protection.

Description

technical field [0001] The invention belongs to the technical field of personal protection and air purification, and in particular relates to a high-efficiency protective mask based on an all-fiber electret generator and a preparation method thereof. Background technique [0002] With the continuous deepening of the industrialization process, fine particulate matter has become one of the important air pollutants, causing serious harm to human health. Therefore, personal protection based on anti-smog is becoming more and more important. [0003] Traditional high-efficiency protective mask materials mainly rely on mechanical effects such as physical interception, inertial collision, and Brownian diffusion to capture fine particles. While achieving high-efficiency filtration of fine particle pollutants, the pressure resistance is also large, and the air permeability and comfort are poor. [0004] Melt-blown electret material is another widely used mask material. It introduces e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62B7/10A62B9/02A62B23/02
CPCA62B7/10A62B9/022A62B23/02
Inventor 蔡容容雷杨张立志张昊晴
Owner SOUTH CHINA UNIV OF TECH
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