CN212818617U - Gas filtration structure and gas filtration article having a coating - Google Patents
Gas filtration structure and gas filtration article having a coating Download PDFInfo
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- CN212818617U CN212818617U CN202020978135.6U CN202020978135U CN212818617U CN 212818617 U CN212818617 U CN 212818617U CN 202020978135 U CN202020978135 U CN 202020978135U CN 212818617 U CN212818617 U CN 212818617U
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Abstract
The utility model relates to a gas filtration with coating, its characterized in that filtration includes: a filter element structure, wherein the filter element structure comprises a plurality of filter wires which are interlaced and woven with each other, and the diameter of the filter wires ranges from 0.05 μm to 500 μm; and a coating structure, wherein the coating structure is positioned outside the filter wire in a uniformly distributed or non-uniformly distributed manner, the thickness of the coating structure is 0.001-500 μm, and the coating layerThe average coating weight of the structure is at least 300mg/m2. The present invention also relates to gas filtration articles comprising one or more gas filtration structures having a coating. The gas filtering structure with the coating of the utility model can play a quick, high-efficiency and lasting killing effect on microorganisms in the gas.
Description
Technical Field
The utility model relates to a gas filtration structure with coating and the gas filtration goods that contain this gas filtration structure, concretely relates to compound filter wire gas filtration structure with copper coating and contain this compound filter wire gas filtration structure's with copper coating gas filtration goods.
Background
With the increasing emphasis on the quality of air and indoor air in modern times, the demand for technical improvement of air filter materials is increasing. Fiberglass air material received us patent in 1940. With the development of the nonwoven industry, air filter materials made of various chemical fiber materials, such as Polyester (PET), polyamide, polypropylene (PP), Polyphenylene Sulfide (PPs), Polytetrafluoroethylene (PTFE), etc., inorganic fibers such as glass fibers, ceramic fibers, etc., have appeared.
The requirements for the air filtering material are higher and more diversified at present. The air filtering material not only needs to have high filtering efficiency, but also has long service life; meanwhile, aiming at the filtration of the breathing air, the filtering material is required to be non-toxic and free of health risks, and more importantly, the filtering material has good capabilities of sterilizing and killing viruses and microorganisms within the service life. With the emergence of these requirements, composite filter materials are becoming a trend. Early composite filter materials were simply laminated and compounded, such as by thermally bonding different nonwoven fabrics at a certain temperature and pressure.
However, as the demand for quality of breathing air is becoming higher, the demand for air filtration materials is now inadequate for particulate interception and harmful gas removal. More importantly, the method can remove harmful microorganisms such as bacteria and viruses and block the spread of diseases. Thus producing a variety of forms of composite filters.
Patent US20150258480a1 describes a composite filter in which an antimicrobial compound containing zinc is superimposed in an air filter. Patent US20080302713a1 also describes an air filter structure with an antimicrobial layer superimposed. There is also literature on TiO2The photocatalyst film is superposed and compounded on the air filter material, or the nano silver particles are added on the surface of the filter material to achieve the function of killing microorganismsAnd (5) effect.
However, the existing air filtering structure has the defects of long time for killing microorganisms, insufficient microorganism killing effect and the like. Therefore, there is still a need to develop a novel filter structure in order to achieve rapid, efficient and durable killing of microorganisms, as well as broad antimicrobial spectrum.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model discloses a can realize fast, high-efficient, lasting and the extensive gas filtration structure with coating of antimicrobial spectrum and contain this gas filtration structure's gas filtration goods.
In one aspect, the utility model provides a gas filtration structure with coating, its characterized in that filtration structure includes:
a filter element structure, wherein the filter element structure comprises a plurality of filter wires which are interlaced and woven with each other, and the diameter of the filter wires ranges from 0.05 μm to 500 μm; and
a coating structure, wherein the coating structure is located on the outside of the filter wire in a uniformly or non-uniformly distributed manner, the thickness of the coating structure is 0.001-500 μm, and the average coating amount of the coating structure is at least 300mg/m2。
In one embodiment, the diameter of the filter filaments ranges from 0.05 μm to 300 μm, preferably from 0.05 μm to 100 μm, preferably from 0.05 μm to 50 μm, preferably from 0.01 μm to 30 μm, preferably from 0.01 μm to 10 μm, preferably from 0.1 μm to 1 μm.
In one embodiment, the thickness of the coating structure is in the range of 0.001 μm to 500. mu.m, preferably 0.001 μm to 300. mu.m, preferably 0.001 to 100. mu.m, preferably 0.1 to 1 μm.
In one embodiment, the average coating weight of the coating structure is 300mg/m2-1000 mg/m2Preferably 300mg/m2-700mg/m2Preferably 300mg/m2-500mg/m2Preferably 300mg/m2-400mg/m2Preferably 300mg/m2-350mg/m2Preferably 300mg/m2-320 mg/m2Preferably 300mg/m2。
In one embodiment, the plurality of interwoven filter filaments form a mesh structure.
In one embodiment, the material of the coating structure is one or more selected from the group consisting of: copper, silver, zinc, gold and alloys of one or more of these, preferably copper.
In one embodiment, the coating structure is chemically or coordinately bonded to the filter element structure, or the coating structure is deposited onto an outer layer of the filter element structure by vapor phase evaporation.
In another aspect, the present invention provides a gas filtration article characterized in that said gas filtration article comprises one or more layers of a coated gas filtration structure as described in any one of the preceding claims.
In one embodiment, the gas filtration article is a personal protective product or an air filtration device.
In one embodiment, the gas filtration article is selected from the group consisting of: mask, medical protective clothing, first aid respirator, vehicle air conditioner filter core, train air conditioner filter core, aircraft air conditioner filter core, domestic air conditioner filter core, building air conditioner filter core, vent filter core, new trend system, car air filter core, wrap up in corpse cloth and the used air evolution system of hospital's laminar flow room.
The gas filtering structure with the coating of the utility model can realize the quick killing effect of 5 minutes for the microorganism and can keep more than ten hours. Moreover, the utility model discloses a gas filtration structure with coating can reach more than 99% to the destruction efficiency of microorganism, and has still to have more than 90% effect of killing the microorganism after using 3 months. In addition, the coated gas filter structures of the present invention are suitable for use with a wide variety of microorganisms, including bacteria and viruses, and have a broad antimicrobial spectrum.
Drawings
FIG. 1: the utility model discloses a gas filtration's with coating structure schematic diagram.
Reference numerals: the number (i) represents the filter structure and the number (ii) represents the coating structure.
FIG. 2A: the cross-sectional view of the filter wire in the filter element structure of the utility model is that the coating structure is evenly distributed on the outer layer of the filter wire; and FIG. 2B: the utility model discloses the cross-sectional view of filter element among the filter core structure, wherein coating structure non-uniform distribution is at the skin of filter element.
Reference numerals: the number (i) represents the filter structure and the number (ii) represents the coating structure.
FIG. 3: the utility model discloses a 300mg/m2Microscopic examination of the copper coated gas filtration structure. As shown in the figure, the copper coating of the utility model is coated on the outer layer of the filter wire evenly and continuously.
Detailed Description
In one aspect, the present invention provides a gas filtration structure having a coating. Fig. 1 is a schematic structural view of a gas filter structure having a coating according to the present invention.
As shown in fig. 1, the gas filtering structure with a coating of the present invention includes a filter element structure and a coating structure (2). The filter element structure comprises a plurality of filter wires (1) which are interlaced and woven. In one embodiment, the plurality of interlaced filter filaments of the present invention form a mesh structure. The utility model discloses a gas filtering structure with coating can combine together filter core structure and the function that has the coating structure of killing the microorganism effect very well. The filter element structure can efficiently and quickly kill intercepted microorganisms while generating an interception function, effectively prevents the microorganisms from breeding and propagating in the air filter, and prevents diseases from spreading due to the fact that the microorganisms enter clean air along with air flow.
In one embodiment, the diameter of the filter filaments of the present invention is in the range of 0.05 μm to 500 μm, preferably 0.05 μm to 300 μm, preferably 0.05 μm to 100 μm, preferably 0.05 μm to 50 μm, preferably 0.01 μm to 30 μm, preferably 0.01 μm to 10 μm, preferably 0.1 μm to 1 μm.
As shown in fig. 1, the coating structure (2) is located on the outside of the filter wire. In one embodiment, the thickness of the coating structure is from 0.001 μm to 500. mu.m, preferably from 0.001 μm to 300. mu.m, preferably from 0.001 to 100. mu.m, preferably from 0.1 to 1 μm. In one implementationIn this way, the average coating weight of the coating structure is at least 300mg/m2. In one embodiment, the average coating weight of the coating structure is 300mg/m2-500 mg/m2Preferably 300mg/m2-400mg/m2Preferably 300mg/m2-350mg/m2Preferably 300mg/m2-320mg/m2。
The filter element structure of the gas filter structure with the coating of the present invention can be made of a filter material commonly used in the art. In one embodiment, the material of the filter element arrangement is selected from one or more of the group consisting of: polyester, polyamide, polypropylene, polyphenylene sulfide, polytetrafluoroethylene, Polyethersulfone (PES), Cellulose Acetate (CA), Mixed Cellulose Ester (MCE), cellulose Nitrate (NC), polyvinylidene fluoride (PVDF), Nylon (NV), Expanded Polytetrafluoroethylene (EPTEF), glass fibers, and ceramic fibers. The material of the coating structure may be a metal layer, in particular a metal with a biocidal effect as known in the art. In one embodiment, the material of the coating structure is selected from one or more of the following: copper, silver, zinc, gold, and alloys of one or more of these. In one embodiment, the material of the coating structure is copper. By using elemental copper as the material of the coating structure, the gas filtration structure of the present invention can achieve the killing of microorganisms. Experiments prove that when the copper content of the coating structure is more than 300mg/m2When in use, the gas filtering structure of the utility model can realize the quick killing effect of the microorganism for 5 minutes, and can keep more than ten hours, and the killing efficiency is up to more than 99%.
Fig. 2A is a cross-sectional view of a filter element in a filter element structure according to the present invention, wherein the coating structure is uniformly distributed on the outer layer of the filter element. Fig. 2B is a cross-sectional view of the filter element structure of the present invention, wherein the coating structure is non-uniformly distributed on the outer layer of the filter element. In one embodiment, the coating structure is uniformly distributed or non-uniformly distributed on the outer layer of the filter wire. In one embodiment, the coating structure is attached to the outer layer of the filter element by a chemical bond. In one embodiment, the coating structure is attached to the outer layer of the filter element by a coordination bond.
The cross-section of the filter wire may be any shape including, but not limited to, circular, oval, rectangular, diamond, trapezoidal, and the like. In one embodiment, the filter wire is a filter wire having a circular cross-section.
By adopting the coating structure coupled to the filter wires, instead of mixing or soaking the filter wires with a material having a microorganism-killing effect, such as metal, the coating structure can be firmly fixed to the surfaces of the filter wires and can be brought into sufficient contact with target microorganisms, thereby greatly improving the microorganism-killing effect.
In another aspect, the present invention provides a gas filtration article characterized in that said gas filtration article comprises one or more layers of a coated gas filtration structure as described in any one of the preceding claims. Take the gauze mask as an example, include the utility model discloses gas filtration's gauze mask includes following structure: non-woven fabrics layer, melt and spout the cloth layer, the utility model discloses gas filtration and the cloth layer of weaving.
In one embodiment, the gas filtration article is a personal protective product or an air filtration device. In one embodiment, the personal protective product is a mask and the air filtration device is an air conditioning filter, such as an automotive air conditioning filter, a train air conditioning filter, an aircraft air conditioning filter, a household air conditioning filter, a building air conditioning filter, a vent filter.
In one embodiment, the gas filtration article is selected from the group consisting of: mask, medical protective clothing, first aid respirator, vehicle air conditioner filter core, train air conditioner filter core, aircraft air conditioner filter core, domestic air conditioner filter core, building air conditioner filter core, vent filter core, new trend system, car air filter core, wrap up in corpse cloth and the used air evolution system of hospital's laminar flow room.
Specific embodiments of the present invention will now be described by way of the following non-limiting examples.
Examples
2EXAMPLE 1250 mg/m copper coating amount of Filter construction preparation(sample 1)
The polypropylene PP material with the diameter of 10 microns of the filter wire is used as a filter structure base material, the coating material is copper, and the copper is coated on the filter structure base material in a magnetron sputtering mode.
First, the filter structure substrate was placed in a vacuum chamber with a transmission speed of 5 m/min. In this step, the transmission speed can be adjusted according to the target material loss. Subsequently, a copper target is positioned into the chamber. The vacuum chamber is evacuated to 10-4After Pa, 1Pa of inert gas Ar is charged as a carrier for the gas discharge.
And setting the parameters of a film thickness instrument of the magnetron sputtering instrument. The film thickness gauge parameters were set to correspond to a copper equivalent of 250mg/m2Copper coating thickness. The instrument was turned on and copper was coated on the polypropylene PP substrate so that the copper was chemically bonded to the substrate. Microscopic observation was performed to ensure uniform coating. The final coating obtained was 250mg/m2Copper coated polypropylene PP substrate (sample 1).
2EXAMPLE 2300 mg/m copper coating amount of filter structure preparation(sample 2-3)
The polypropylene PP material with the diameter of 10 microns of the filter wire is used as a filter structure base material, the coating material is copper, and the copper is coated on the filter structure base material in a magnetron sputtering mode.
The process steps are as described above, except that the film thickness gauge parameters are set to correspond to a copper equivalent of 300mg/m2Copper coating thickness. The instrument was turned on and copper coating on the polypropylene PP substrate was performed. Microscopy was performed to ensure uniform coating (shown in figure 3). To obtain a coating of 300mg/m2Copper coated polypropylene PP substrate (sample 2).
In another approach, copper is applied to the surface of a polypropylene PP material using a chemical coordination process such that the copper is coordinately bound to the substrate. The amount of copper added to the coating material was controlled to ensure that a coating of 300mg/m was obtained2Copper coated polypropylene PP substrate (sample 3).
EXAMPLE 3 detection of the antibacterial Effect of the Filter Structure
Samples 1-3 were tested for their antimicrobial effect. The test unit is the antibacterial material detection center of the research institute of physical and chemical technology of the Chinese academy of sciences.
The test microorganisms used were Escherichia coli (Escherichia coli; ATCC 25922) and Staphylococcus aureus (Staphylococcus aureus; ATCC 6538).
The antibacterial effect test method comprises the following steps:
the samples for examination were cut to 18mm x 18mm size.
1 neutralizer identification test
According to the standard GB15979-2002 of the Ministry of public health of the people's republic of China, the sterilization performance test must pass the following neutralizer identification test.
1.1 test grouping
1) Strain-staining sample plus 5mL PBS
2) Bacterial sample plus 5mL neutralizer (physiological saline)
3) Photo of infected bacteria +5mL neutralizing agent
4) Sample +5mL neutralizer + staining contrast
5) Photograph of infected bacteria +5mL PBS
6) The same batch of PBS.
7) Same batch neutralizer
8) Same batch culture medium
1.2 evaluation provisions
1) Group 1 was either sterile or had only a few colonies of test bacteria.
2) Group 2 had more test colonies than group 1, but fewer colonies than groups 3, 4, and 5, and met the requirements.
3) Groups 3, 4, and 5 had similar amounts of test bacteria and grew at 1X104-9x104The colony error rate between cfu/plate groups should not exceed 15%.
4) Groups 6-8 were grown aseptically.
5) The qualification evaluation was obtained in 3 consecutive tests.
3.2 Sterilization test
3.2.1 working step
The slant culture of the test bacteria was washed with PBS to prepare a bacterial suspension (the desired concentration: 100. mu.L of the bacterial suspension was dropped on a control sample, and the number of recovered bacteria was 1X104-9x104cfu/patch).
The test piece 2.0cm x 3.0cm) and the control piece (the same material as the test piece, the same size, but containing no antibacterial material, and sterilized) were taken for 4 pieces each, and divided into 4 groups and placed in 4 sterilized plates.
Taking the bacterial suspension, respectively dropping 100 mu L of the bacterial suspension on each sample to be tested and each control sample, uniformly coating, starting timing, acting for 5min, respectively putting the samples into test tubes containing 5mL of corresponding neutralizers by using sterile forceps, fully and uniformly mixing, diluting properly, then taking 2-3 dilutions, respectively sucking 0.5mL, placing the dilutions in two plates, pouring 15mL of nutrient agar culture medium cooled to 40-45 ℃, rotating the plates to fully and uniformly, turning the plates after agar solidification, culturing for 48h at 35 +/-2 ℃, and counting viable bacteria colonies. The test was repeated 3 times and the bactericidal rate was calculated as follows:
X3＝(A-B)/A x 100％
x3-bactericidal rate; a is the average colony number of the control sample; b is the average colony number of the test sample.
The detection data are as follows:
TABLE 1
TABLE 2
Based on the above results, 300mg/m2The filtering structure of the copper coating amount can be realized>99 percent of antibacterial/bactericidal effect, which is far beyond the requirement of more than or equal to 90 percent of bactericidal rate specified in GB15979-2002 standard. Furthermore, 300mg/m2The copper coated filter structure can achieve this high antibacterial/bactericidal rate quickly, requiring as little as 5 minutes.
EXAMPLE 4 the anti-viral effect of the filter structure of the present invention
1. test article
1) Strain: enterovirus EV71 and Coxsackie virus CA16
2) Cell: vero cell
2. Test conditions
1) Temperature: 23-25 deg.C
2) Relative humidity of 50-60%
3) Test time: 18 hours
3. Test procedure
Cytotoxicity test
The test samples were cut out for use and evaluated for toxicity to cells, respectively, with reference to the standards ISO18184-2014 and Disinfection specifications 2002.
Virus killing experiment
Referring to the ISO18184-2014 standard and 2002 edition of disinfection technical Specification, a test sample is reacted with a virus suspension for 18 hours, the sample is recovered to detect the degree of illness, and a blank control is set in the experiment.
The test results are as follows:
1. the test sample has no toxic effect on Vero cells and the cells grow well.
2. Under the experimental conditions set in the test, the test sample acts on the suspension of the enterovirus EV71 and the coxsackievirus CA16 for 18 hours, and the test sample has certain killing effect on the enterovirus EV71 and the coxsackievirus CA16 (Table 3).
TABLE 3
Based on the above results, the filtering structure of the present invention has a good virus killing effect, and the virus killing rate in 18 hours reaches more than 99%.
The above experiment did not end after 18 hours. Sample 2 was transferred to be attached to the air outlet of the air filter of the office building, and kept for 3 months, and then the sterilization effect was measured. The parallel contrast uses the ordinary PP material that does not contain the copper coating of the utility model as the filter media. The measurement method was as in example 4.
TABLE 4
| Sterilizing rate of Escherichia coli | |
| Time of treatment | After 3 months |
| Sample 3 | 90.04％ |
| Ordinary PP material | The large amount of bacteria grows and basically fails |
In this way, it can be seen that,the utility model discloses a filtration can realize that long-term nature disinfects, and bactericidal effect can keep 3 months at least, and 3 months's bactericidal effect is still more than 90%, accords with the requirement that is greater than or equal to 90% in the national GB15979-2002 standard.
Claims (24)
1. A gas filter structure having a coating, said filter structure comprising:
a filter element structure, wherein the filter element structure comprises a plurality of filter wires which are interlaced and woven with each other, and the diameter of the filter wires ranges from 0.05 μm to 500 μm; and
a coating structure, wherein the coating structure is located outside the filter wire in a uniformly distributed or non-uniformly distributed manner, the thickness of the coating structure is 0.001-500 μm,and the average coating weight of the coating structure is at least 300mg/m2。
2. The coated gas filter structure according to claim 1, wherein said filter filaments have a diameter in the range of 0.05 μm to 300 μm.
3. The coated gas filter structure of claim 1, wherein the diameter of said filter filaments is in the range of 0.05 μ ι η to 100 μ ι η.
4. The coated gas filter structure of claim 1, wherein the diameter of said filter filaments is in the range of 0.05 μm to 50 μm.
5. The coated gas filter structure of claim 1, wherein the diameter of said filter filaments is in the range of 0.01 μ ι η to 30 μ ι η.
6. The coated gas filter structure of claim 1, wherein the diameter of said filter filaments is in the range of 0.01 μ ι η to 10 μ ι η.
7. The coated gas filter structure of claim 1, wherein the diameter of said filter filaments is in the range of 0.1 μm to 1 μm.
8. A gas filter structure having a coating according to any one of claims 1 to 7, characterised in that the thickness of the coating structure is in the range 0.001 μm to 500 μm.
9. A gas filter structure having a coating according to any one of claims 1 to 7, characterised in that the thickness of the coating structure is in the range 0.001 μm to 300 μm.
10. A coated gas filter structure according to any of claims 1 to 7, characterised in that the thickness of the coating structure is 0.001-100 μm.
11. A coated gas filter structure according to any of claims 1 to 7, characterised in that the thickness of the coating structure is 0.1-1 μm.
12. Coated gas filter structure according to any of claims 1 to 7, characterised in that the average coating weight of the coating structure is 300mg/m2-1000mg/m2。
13. Coated gas filter structure according to any of claims 1 to 7, characterised in that the average coating weight of the coating structure is 300mg/m2-700mg/m2。
14. Coated gas filter structure according to any of claims 1 to 7, characterised in that the average coating weight of the coating structure is 300mg/m2-500mg/m2。
15. Coated gas filter structure according to any of claims 1 to 7, characterised in that the average coating weight of the coating structure is 300mg/m2-400mg/m2。
16. Coated gas filter structure according to any of claims 1 to 7, characterised in that the average coating weight of the coating structure is 300mg/m2-350mg/m2。
17. Coated gas filter structure according to any of claims 1 to 7, characterised in that the average coating weight of the coating structure is 300mg/m2-320mg/m2。
18. According to any one of claims 1-7The coated gas filter structure of claim wherein the average coating weight of said coating structure is 300mg/m2。
19. A coated gas filter structure according to any of claims 1 to 7, wherein said plurality of interlaced filter filaments form a mesh structure.
20. A coated gas filter structure according to any of claims 1 to 7, characterised in that the material of the coating structure is one of copper, silver, zinc, gold.
21. A coated gas filter structure according to any of claims 1 to 7, wherein the coating structure is attached to the filter element structure by chemical or coordinative bonding, or the coating structure is deposited onto the outer layer of the filter element structure by vapour phase evaporation.
22. A gas filtration article comprising one or more layers of the coated gas filtration structure of any one of claims 1-21.
23. The gas filtration article of claim 22 wherein said gas filtration article is a personal protective product or an air filtration device.
24. The gas filtration article of claim 22, wherein the gas filtration article is selected from the group consisting of: mask, medical protective clothing, first aid respirator, vehicle air conditioner filter core, train air conditioner filter core, aircraft air conditioner filter core, domestic air conditioner filter core, building air conditioner filter core, vent filter core, new trend system, car air filter core, wrap up in corpse cloth and the used air evolution system of hospital's laminar flow room.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021244477A1 (en) * | 2020-06-01 | 2021-12-09 | 南京鼎卫空气净化有限公司 | Copper-coated anti-microbial filter material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021244477A1 (en) * | 2020-06-01 | 2021-12-09 | 南京鼎卫空气净化有限公司 | Copper-coated anti-microbial filter material |
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Effective date of registration: 20230608 Address after: Room 1208, 12th Floor, Building 3, Yard 8, Dongqiao Road, Chaoyang District, Beijing, 100000 Patentee after: Dingwei Jingyan Chuangli (Beijing) Technology Service Co.,Ltd. Address before: 211100 second floor, unit B, 300 Zhihui Road, Qilin science and Technology Innovation Institute, Jiangning District, Nanjing City, Jiangsu Province Patentee before: Nanjing Dingwei air purification Co.,Ltd. |