Gas-phase filter material and filter unit

A technology of filter unit and filter material, applied in filtration separation, dispersed particle filtration, separation method, etc., can solve the problems of large specific surface area, great harm to human body, small particle size of PM2.5, etc., to achieve large specific surface area, excellent Mechanical properties, good effect

Pending Publication Date: 2019-12-27
宋恩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, due to the small particle size and large specific surface area of ​​PM2.5, it is easy to absorb toxic and harmful substances, such as heavy metals and microorganisms, so it is very harmful to the human body.

Method used

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  • Gas-phase filter material and filter unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The porous PLA micro-nano fiber membrane is prepared by the following steps:

[0041] 1) Ultrasonic dispersion of GO in N-methylpyrrolidone according to a solid-liquid ratio of 1:6, and then add L-lactic acid monomer, the weight ratio of GO to L-lactic acid monomer is 1:3, drain through nitrogen, The mixture is uniformly heated to 120°C within 45 minutes, and the polycondensation reaction occurs after stirring for 12 hours at a stirring speed of 500 rpm. After the reaction is completed, it is filtered and dried to obtain GO-g-PLLA nanoparticles;

[0042] 2) According to the solid-liquid ratio of 1:5, the GO-g-PLLA nanoparticles are ultrasonically dispersed in NH 2 In the OH·HCl solution (pH=7), drain with nitrogen, stir the reaction for 3 hours at a temperature of 65°C and a stirring speed of 500 rpm, filter and dry after the reaction, to obtain rGO-g-PLLA nanoparticles;

[0043] 3) Disperse rGO-g-PLLA nanoparticles in dichloromethane ultrasonically, then add PLA, stir well to...

Embodiment 2

[0046] The porous PLA micro-nano fiber membrane is prepared by the following steps:

[0047] 1) Ultrasonic dispersion of GO in N-methylpyrrolidone according to a solid-liquid ratio of 1:6, and then add L-lactic acid monomer, the weight ratio of GO to L-lactic acid monomer is 1:3, drain through nitrogen, The mixture is uniformly heated to 120°C within 45 minutes, and the polycondensation reaction occurs after stirring for 12 hours at a stirring speed of 500 rpm. After the reaction is completed, it is filtered and dried to obtain GO-g-PLLA nanoparticles;

[0048] 2) According to the solid-liquid ratio of 1:5, the GO-g-PLLA nanoparticles are ultrasonically dispersed in NH 2 In the OH·HCl solution (pH=7), drain with nitrogen, stir the reaction for 3 hours at a temperature of 65°C and a stirring speed of 500 rpm, filter and dry after the reaction, to obtain rGO-g-PLLA nanoparticles;

[0049] 3) Disperse rGO-g-PLLA nanoparticles in dichloromethane ultrasonically, then add PLA, polyvinylpyr...

Embodiment 3

[0052] Such as Figure 2-4 As shown, the gas-phase filter material 10 has an air-permeable cover layer 101, a pre-collection layer 102, a main capture layer 103, and a gas-permeable support layer 104 sequentially stacked from the upstream side of the airflow; the air-permeable cover layer 101 is selected by the average fiber diameter The spunbonded non-woven fabric composed of 15μm polycaprolactone fibers allows dust in the airflow to pass through, and prevents the surface of the filter material from deforming when pressed from the outside; the pre-collection layer 102 uses an average fiber diameter of 2μm A non-woven fabric composed of polycaprolactone, using a hot-melt adhesive to heat-laminate the air-permeable cover layer 101 and the pre-capturing layer 102 at 110°C to form a laminate I, which is used to trap dust in the airflow The main trapping layer 103 includes the porous PLA micro-nano fiber membrane obtained in Example 1, which traps dust after passing through the pre-...

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Abstract

The invention provides a gas-phase filter material and a filter unit, and belongs to the technical field of air filtration. According to the gas-phase filter material, a breathable covering layer, a pre-trapping layer, a main trapping layer and a breathable support layer are sequentially laminated from the upstream side of an air flow; the main trapping layer comprises a porous PLA micro-nano fiber membrane doped with rGO-g-PLLA nano particles. The filter unit comprises the gas-phase filtering material and a frame body. The filter material and the filter unit are simple and feasible to prepare, high in yield and capable of increasing the softness of the surfaces of the micro-particles, so that the micro-particles are easier to swell and modify. The porous PLA micro-nano fiber membrane forthe main trapping layer of the gas-phase filter material is small in fiber diameter, large in specific surface area and large in pore volume; the gas-phase filter material has excellent mechanical properties, antibacterial activity and high-temperature resistance, has strong trapping capability on particulate matters such as PM2.5, reduces the resistance pressure, and also has excellent air filtering performance when the thickness of the main trapping layer is relatively low.

Description

Technical field [0001] The invention belongs to the technical field of air filtration, and specifically relates to a gas phase filter material and a filter unit. Background technique [0002] With the advancement of industrialization and urbanization, the economic and social activities of the high-density population emit a large amount of particulate matter, which has led to increasingly serious environmental problems, especially the smog that has been covering the land of China for a long time in recent years, and people are concerned about air pollution. The degree of continuous improvement. Haze is a catastrophic weather phenomenon that occurs near the surface of the atmosphere under specific gas phase conditions. It is mainly composed of inhalable particulate matter (PM10) and lung particulate matter (PM2.5), and PM2.5 is considered It is the "culprit" that caused the smog. PM2.5 refers to particles with an aerodynamic diameter less than or equal to 2.5 microns in the air e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D46/52B01D46/54B01D71/48B01D69/02
CPCB01D39/14B01D46/0001B01D46/525B01D46/543B01D46/546B01D69/02B01D71/024B01D71/48B01D2325/24B01D2325/48
Inventor 宋恩
Owner 宋恩
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