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Air filtering material with temperature and humidity response performance and preparation and application thereof

An air filter material, humidity response technology, applied in textiles and papermaking, chemical instruments and methods, fire alarms that rely on radiation, etc. Affect the filtration performance and other problems, to achieve the effect of suppressing the further spread of the flame, fast warning time, and high air filtration efficiency

Active Publication Date: 2022-06-21
CHINA TEXTILE ACAD JIANGNAN BRANCH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common fiber-based humidity-responsive materials are mostly composed of graphene or silver nanoparticles combined with fibers, but due to the combination of these materials and the matrix, their stability in use is not good, and their manufacturing costs are also high
[0003] At present, there are few studies on the fire response performance of air filter materials. If the above-mentioned materials with variable heating resistance are processed into the current air filter materials, from the perspective of the factors affecting the filter performance, these additives will affect the fiber. The pore size and porosity of the aggregates affect the filtration performance

Method used

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  • Air filtering material with temperature and humidity response performance and preparation and application thereof
  • Air filtering material with temperature and humidity response performance and preparation and application thereof
  • Air filtering material with temperature and humidity response performance and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A preparation method of an air filter material with temperature and humidity response performance, the steps are as follows:

[0052] (1) phytic acid is dissolved in solvent N-N dimethylformamide (DMF) to obtain solution A; the concentration of phytic acid in solution A is 10wt%;

[0053] (2) adding polyacrylonitrile to the solution A obtained in step (1), and stirring for 5h at a temperature of 60° C. to form a uniform solution B; in solution B, the mass ratio of polyacrylonitrile to phytic acid is 1.2: 1;

[0054] (3) If figure 1 As shown, the solution B obtained in step (2) was transported to the nozzle with a syringe pump at a flow rate of 1 ml / h. Under the high pressure condition of 20kV, the solution B was drawn by the electric force at the end of the nozzle to form nanofibers. After receiving on the receiving device (roller) for a period of time, a fiber aggregate with random arrangement is formed; wherein, the spinning temperature is 20° C., and the relative h...

Embodiment 2

[0058] A preparation method of an air filter material with temperature and humidity response performance, the steps are as follows:

[0059] (1) phosphoric acid is dissolved in solvent acetone to obtain solution A; the concentration of phosphoric acid in solution A is 7wt%;

[0060] (2) adding polyurethane to the solution A obtained in step (1), and stirring at 20° C. for 5 hours to form a uniform solution B; in solution B, the mass ratio of polyurethane to phytic acid is 2.2:1;

[0061] (3) The solution B obtained in step (2) was transported to the nozzle at a flow rate of 1.5ml / h with a syringe pump, and under the high pressure condition of 15kV, the solution B was drawn by the electric force at the end of the nozzle to form nanofibers, and After receiving on the receiving device (roller) for a period of time, a fiber aggregate with random arrangement is formed; wherein, the spinning temperature is 20° C., and the relative humidity of spinning is 60%;

[0062] (4) take out ...

Embodiment 3

[0065] A preparation method of an air filter material with temperature and humidity response performance, the steps are as follows:

[0066] (1) phytic acid and phosphoric acid are dissolved in solvent formic acid to obtain solution A; In solution A, the mass ratio of phytic acid and phosphoric acid is 1:1, and the sum of the concentrations of phytic acid and phosphoric acid is 8wt%;

[0067] (2) Add PA6 (25038-54-4, Ron's reagent, monomer molecular weight 111.14) to the solution A obtained in step (1), and stir for 8 hours at a temperature of 20°C to form a uniform solution B; solution B , the ratio of polyamide to the sum of the mass of phytic acid and phosphoric acid is 2.5:1;

[0068] (3) The solution B obtained in step (2) was transported to the nozzle at a flow rate of 1.5ml / h with a syringe pump, and under the high pressure condition of 28kV, the solution B was drawn by the electric force at the end of the nozzle to form nanofibers, and After receiving on the receiving...

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Abstract

The invention relates to an air filtering material with temperature and humidity response performance as well as preparation and application of the air filtering material. The air filtering material consists of a polymer (more than one of polyamide, polyurethane, polyacrylonitrile, polyoxyethylene and polyvinylpyrrolidone) and protonic acid (phytic acid and / or phosphoric acid) which is uniformly dispersed and dissolved in the polymer; the preparation method comprises the following steps: adding protonic acid and a polymer into a solvent to prepare a spinning solution, and carrying out electrostatic spinning to prepare the air filtering material, according to the application, the air filtering material and an alarm device are connected in series to form a fire alarm circuit; the thickness of the air filtering material is 20-30 [mu] m, and the breaking strength is 2-5 MPa. The air filtering material has better temperature and humidity response performance and better filtering performance, and compared with a coating mode in the prior art, the method disclosed by the invention can still ensure stable and excellent response performance under the condition of mechanical external force or long-time use.

Description

technical field [0001] The invention belongs to the technical field of filter materials, and relates to an air filter material with temperature and humidity response performance and its preparation and application. Background technique [0002] With the increasingly prominent air pollution and residents' health problems, people's demand for multi-functional air filter materials is increasing. Especially under some extreme working conditions, such as fire fighting or high humidity conditions, it will cause certain potential hazards to equipment operation and human health. Common temperature-responsive materials are usually coated on the surface of fabrics or aerogel materials with materials with variable thermal resistance, such as graphene oxide (GO), aminated carbon nanotubes and other heat-sensitive materials (such as CN111019187 A). Using such conductive materials under high temperature conditions, some functional groups are easily reduced by heat to form a low resistanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/02B01D67/00B01D71/42B01D71/44B01D71/52B01D71/56B01D71/76D01D5/00D04H1/728G08B17/12
CPCB01D69/02B01D71/42B01D71/56B01D71/76B01D71/44B01D71/52B01D67/0002D04H1/728D01D5/0015G08B17/12B01D2325/26
Inventor 赵铁男崔桂新张小云胡容霞李俊玲吕水君许增慧杨国荣方虹天曾泳春
Owner CHINA TEXTILE ACAD JIANGNAN BRANCH
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