Unlock instant, AI-driven research and patent intelligence for your innovation.

PM2.5 filter membrane, preparation method and PM2.5 filter screen window

A filter membrane and screen window technology, applied in the environmental field, can solve the problems that the filter membrane of PM2.5 needs to be improved

Active Publication Date: 2020-01-21
TSINGHUA UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the filter membranes currently available for filtering PM2.5 still need to be improved

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • PM2.5 filter membrane, preparation method and PM2.5 filter screen window
  • PM2.5 filter membrane, preparation method and PM2.5 filter screen window
  • PM2.5 filter membrane, preparation method and PM2.5 filter screen window

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1 prepares PM2.5 filter membrane

[0053] Weigh 5 g of N-N dimethylformamide solvent and 0.5 g of polyacrylonitrile (PAN) powder, respectively pour them into glass bottles and stir to form a slightly yellow homogeneous solution. Take a 1ml syringe to draw part of the solution, and after installing the needle, insert it into the connecting device between the needle and the airflow, and adjust the pressure of the airflow and the advancing speed of the syringe. Copper mesh is used as the substrate. After adjustment, make the spinning device 20cm away from the substrate, and move the device slowly to form a PM2.5 filter film on the entire upper surface of the substrate. The time is 10 minutes, and the transparency of the obtained PM2.5 filter membrane is 80%.

[0054] By extending the spraying time, PM2.5 filter membranes with transparency of 72%, 54%, 47% and 20% can be obtained respectively. Reference to the physical picture of the filter membrane with diffe...

Embodiment 2

[0056] The preparation process is the same as in Example 1, except that 0.5 g of polyvinylpyrrolidone (PVP) is used instead of polyacrylonitrile (PAN) powder.

[0057] By extending the spraying time, PM2.5 filter membranes with transparency of 86%, 78%, 67%, 47%, and 36% can be obtained respectively.

Embodiment 3

[0059] The preparation process is the same as in Example 1, except that 0.5 g of polymethyl methacrylate (PMMA) is used instead of polyacrylonitrile (PAN) powder.

[0060] By extending the spraying time, PM2.5 filter membranes with transparency of 90%, 79%, 57%, 39%, and 20% can be obtained respectively.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a PM 2.5 filtering membrane, a preparation method of the PM 2.5 filtering membrane and a PM 2.5 filtering screen window. The PM 2.5 filtering membrane is formed from polymer fibers, and the transmittance of the PM 2.5 filtering membrane is 10-90%, wherein the polymer fibers are formed from at least one of polyacrylonitrile, polyvinylpyrrolidone, polyimide, polymethyl methacrylate, nylon, polyvinyl alcohol, polypropylene, polyethylene, polycarbonate, polyacrylic acid, polystyrene, polyvinyl chloride, polyacrylic acid, polyvinyl butyral and polyethylene glycol terephthalate; and the diameter of the polymer fibers is 50nm-20 microns. The PM 2.5 filtering membrane has at least one of the advantages such as controllable transparency, excellent PM 2.5 filtering effect, capacity of realizing large-scale volume production and the like.

Description

technical field [0001] The invention relates to the field of environment, in particular, the invention relates to a PM2.5 filter membrane, a preparation method and a PM2.5 filter screen window. Background technique [0002] Smog is composed of sulfur dioxide, nitrogen oxides and inhalable particulate matter. The former two are gaseous pollutants. They combine with the fog in the air to seriously affect people's health and make outdoor visibility low. , the ecosystem is destroyed. PM2.5, also known as fine particulate matter, refers to particles with an aerodynamic equivalent diameter of 2.5 microns or less, and PM10 refers to particles with an aerodynamic equivalent diameter of 10 microns or less. These ultrafine particles diffuse in the atmosphere, and their diffusion area in the air is large, making it difficult to handle. Especially PM2.5, because of its fine particle size, can be directly inhaled by the human body, and general masks, filters, etc. cannot effectively re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D46/54B01D69/12B01D67/00B01D71/42B01D71/38B01D71/64B01D71/52B01D71/26B01D71/30
CPCB01D46/543B01D67/0002B01D69/12B01D71/26B01D71/30B01D71/38B01D71/42B01D71/52B01D71/64
Inventor 伍晖柏效鹏魏呵呵黄雅
Owner TSINGHUA UNIV