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High-strength flame-retardant air filtering material and preparation method thereof

An air filter material and filter material technology, which is applied in the field of high-strength flame-retardant air filter material and its preparation, can solve the problems of poor filter effect and short service life, etc., so as to prolong service life, improve durability and good thermal stability Effect

Inactive Publication Date: 2019-01-04
俞小峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a high-strength flame-retardant air filter material and its preparation method in view of the poor filtering effect and short service life of the current air filter material

Method used

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  • High-strength flame-retardant air filtering material and preparation method thereof

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preparation example Construction

[0028] The preparation method of filter material base material is:

[0029] (1) Take lithium chloride and add N,N-dimethylformamide according to the mass ratio of 1~4:8~10, keep the humidity at 40~50%, stir and mix at 25~30°C for 20~30min, and then Add polyacrylonitrile with 4 to 6 times the mass of lithium chloride, and magnetically stir for 10 to 12 hours to obtain a stirred mixture;

[0030] (2) Take carbon nanotubes and add N,N-dimethylformamide according to the mass ratio of 1~4: 8~10, and stir for 20~30min to obtain the mixture. Take nitric acid with a concentration of 3mol / L according to the mass ratio of 3~5: 1~3 Add sulfuric acid with a concentration of 1mol / L, stir and mix for 15~20min to obtain a mixed solution, take the mixture according to the mass ratio of 3~6:30~40, add the mixed solution, raise the temperature to 100~110°C, stir and mix for 18~24h, Suction filtration, take the suction filter residue, wash with deionized water, rotary evaporate, and dry to obta...

Embodiment 1

[0042] The preparation method of filter material base material is:

[0043] (1) Take lithium chloride and add N,N-dimethylformamide at a mass ratio of 1:8, keep the humidity at 40%, stir and mix at 25°C for 20 minutes, then add polypropylene with 4 times the mass of lithium chloride Nitrile, magnetically stirred for 10h to obtain a stirred mixture;

[0044] (2) Take carbon nanotubes and add N,N-dimethylformamide at a mass ratio of 1:8, and stir for 20 minutes to obtain a mixture. Take nitric acid with a concentration of 3 mol / L and add nitric acid with a concentration of 1 mol / L at a mass ratio of 3:1 Sulfuric acid, stirred and mixed for 15 minutes to obtain a mixed solution, took the mixture and added it to the mixed solution according to the mass ratio of 3:30, raised the temperature to 100°C and stirred and mixed for 18 hours, then suction filtered, took the suction filter residue, washed it with deionized water, rotary evaporated, and dried to obtain a dry product ;

[0...

Embodiment 2

[0056] The preparation method of filter material base material is:

[0057] (1) Take lithium chloride and add N,N-dimethylformamide in a mass ratio of 3:9, keep the humidity at 45%, stir and mix at 28°C for 25 minutes, then add polypropylene with 5 times the mass of lithium chloride Nitrile, magnetically stirred for 11h to obtain a stirred mixture;

[0058] (2) Take carbon nanotubes and add N,N-dimethylformamide at a mass ratio of 3:9, and stir for 25 minutes to obtain a mixture. Take nitric acid with a concentration of 3 mol / L and add nitric acid with a concentration of 1 mol / L at a mass ratio of 4:2. Sulfuric acid, stirred and mixed for 18 minutes to obtain a mixed solution, took the mixture and added it to the mixed solution at a mass ratio of 5:35, raised the temperature to 105°C, stirred and mixed for 20 hours, filtered with suction, took the suction filter residue, washed it with deionized water, rotated evaporated, and dried to obtain a dry product ;

[0059] (3) Take...

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Abstract

The invention discloses a high-strength flame-retardant air filtering material and a preparation method thereof, and belongs to the technical field of preparation of filtering materials. Lithium chloride and polyacrylonitrile are used as raw materials to obtain nano-fibers, a low-pressure-resistance filtering net-shaped structure is formed, and the service life of the filtering material is prolonged; hydroxyethyl methacrylate and phosphorus pentoxide are subjected to esterification reaction, guanidine sulfamate and guanidine phosphate are added to achieve nitrogen and phosphorus synergistic flame retardance, and meanwhile, a polymer emulsion is fixed in the filtering material to achieve long-acting flame retardance; cerous nitrate and a molecular sieve are added, deliquescence and damage of the filtering material are prevented, and harmful gas is catalytically oxidized via a celerium element, and thus, gas which is harmless to air is formed; and 2-methyl-2-propanol and ramie fibers areintroduced to carry out toughening treatment so as to form a high-strength network structure, and the efficient filtering effect of the filtering material can be maintained for a long time. The problems that the filtering effect of an existing air filtering material is poor and the service life is short are solved.

Description

technical field [0001] The invention belongs to the technical field of filter material preparation, and in particular relates to a high-strength flame-retardant air filter material and a preparation method thereof. Background technique [0002] In addition to oxygen and hydrogen, the air also contains dust, sand, bacteria and other harmful substances. In some special environments, it is necessary to filter the air, such as automobile engines, precision instrument production workshops, laboratories, operating rooms, etc. In addition, , Small particles in the air can deposit in the human lungs and even the blood circulation system, causing respiratory diseases or thrombus; and because of the large specific surface area of ​​small particles, they can absorb a large amount of toxic substances such as organic gases, viruses, bacteria, etc. With the development of society and the popularization of health knowledge, people pay more and more attention to the harm of fine particle po...

Claims

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Application Information

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IPC IPC(8): B01D39/14
CPCB01D39/14B01D2239/0407B01D2239/0457B01D2239/10
Inventor 俞小峰路芸庞成荣
Owner 俞小峰
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