CN215751240U - Nano zinc oxide composite antibacterial filter element - Google Patents
Nano zinc oxide composite antibacterial filter element Download PDFInfo
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- CN215751240U CN215751240U CN202120632495.5U CN202120632495U CN215751240U CN 215751240 U CN215751240 U CN 215751240U CN 202120632495 U CN202120632495 U CN 202120632495U CN 215751240 U CN215751240 U CN 215751240U
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Abstract
The utility model relates to a nano-zinc oxide composite antibacterial filter element, which comprises a first polylactic acid non-woven fabric, a nano-zinc oxide antibacterial filter membrane, a nano-copper oxide antibacterial filter membrane and a second polylactic acid non-woven fabric which are sequentially stacked; the nano zinc oxide antibacterial filter membrane comprises a filter membrane layer and a nano zinc oxide antibacterial layer arranged on the surface of the filter membrane layer; the nano copper oxide antibacterial filter membrane comprises a filter membrane layer and a nano copper oxide antibacterial layer arranged on the surface of the filter membrane layer.
Description
Technical Field
The utility model belongs to the technical field of antibacterial materials, particularly relates to a nano zinc oxide composite antibacterial filter element, and particularly relates to a high heat-resistant nano zinc oxide composite antibacterial filter element with a wide antibacterial range.
Background
With the great improvement of the living standard of people, the pursuit of healthy living quality becomes a necessary trend, and researches show that the proportion of healthy energy conservation is over 50 percent in the selection direction of future air conditioners, and the healthy and high-efficiency energy conservation becomes the primary factor selected by consumers and reaches 80.3 percent. The development history of the health air conditioner has been developed from the first generation of photocatalyst and cold catalyst, the second generation of dust removal and descaling, to the third generation of health air conditioning technology taking sterilization and degerming as the leading factor, so as to replace the original technology, become the mainstream of the market, and also enable a plurality of health technologies on the market to emerge on the water, but the technical level is different.
In the existing sterilization and degerming technology, multi-stage filtration is generally used, and microorganisms, dust and other disease treatment factors in air flow are isolated at an air outlet section; or an ozone generator or ultraviolet sterilization is added in the air outlet pipeline. The former mainly utilizes a physical method, adopts the obstruction of multiple filter screens to generate resistance and increase energy consumption, and the filter screens need to be replaced periodically along with the increase of dust and particles, so that the filter screens cannot be recycled and the environmental burden is increased; the latter also has many problems, for example, when using the ozone generator, people can not stay in the room, and after ventilation is needed, people can enter, otherwise, the people can be harmful to the human body, and the ozone generator is not generally used in public places where people easily gather. With the progress of society, the demand of people on how to correctly use air conditioners is also increasing, and therefore, the demand of sterilization and degerming technologies which are low in cost, free of pollution, environment-friendly and convenient to use is increasing.
CN111437660A discloses a nano-silver disinfection and antibiosis air filter element, which adopts a four-layer structure mode of hydrophobic layer nano-silver disinfection and antibiosis non-woven fabric-active carbon-HEPA high-efficiency filter screen-hydrophilic layer nano-silver disinfection and antibiosis non-woven fabric, can effectively filter out bacteria, viruses, toxic gases and the like in particles, ash layers and liquid, improves the filtering efficiency and prolongs the service life of a machine; in addition, the nano silver particles are a material with a long-acting disinfection and antibiosis effect, the combination of the nano silver and the silver ions can achieve the effects of rapid sterilization and long-acting disinfection and antibiosis, the nano silver and the silver ions have good safety and long-acting performance, the spherical nano silver and the silver ions are loaded on the reticular fiber material of the air filter element, bacteria on the air filter element can be effectively killed, and the long-acting disinfection and antibiosis are realized, so that the air filter element is not easy to mildew and breed bacteria after being used for a long time.
However, the types of air filter cartridges disclosed in the prior art that can achieve high and long-lasting antibacterial effects are still very limited, and therefore, it is of great interest to develop another composite antibacterial filter cartridge for air conditioning systems that can achieve high and long-lasting antibacterial effects.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to provide a nano zinc oxide composite antibacterial filter element, in particular to a nano zinc oxide composite antibacterial filter element which is wide in bacteriostatic range and high in heat resistance.
In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:
in a first aspect, the utility model provides a nano zinc oxide composite antibacterial filter element, which comprises a first polylactic acid non-woven fabric, a nano zinc oxide antibacterial filter membrane, a nano copper oxide antibacterial filter membrane and a second polylactic acid non-woven fabric which are sequentially stacked; the nano zinc oxide antibacterial filter membrane comprises a filter membrane layer and a nano zinc oxide antibacterial layer arranged on the surface of the filter membrane layer; the nano copper oxide antibacterial filter membrane comprises a filter membrane layer and a nano copper oxide antibacterial layer arranged on the surface of the filter membrane layer.
The utility model creatively compounds the nano zinc oxide antibacterial filter membrane and the nano copper oxide antibacterial filter membrane with the polylactic acid non-woven fabric for the antibacterial filtration of air, has more efficient and long-acting antibacterial effect compared with other types of antibacterial filter elements in the prior art, and has more specific bacteria and fungi.
The first polylactic acid non-woven fabric and the second polylactic acid non-woven fabric are used as support layers of the antibacterial filter membranes on one hand and play a role in supporting and protecting the two middle antibacterial filter membranes; on the other hand, the antibacterial filter membrane can be used as an air pre-filtering layer, so that large-particle impurities in air can be effectively blocked, and liquid is not easy to attach to the non-woven fabric due to the hydrophobic property of the non-woven fabric, so that most of bacteria can be blocked outside, the antibacterial effect of the antibacterial filter membrane is protected, the service life of the antibacterial filter membrane is prolonged, and the impact damage of the large-particle impurities on nano zinc oxide or nano copper oxide is prevented; on the other hand, compared with the common fiber film layer, the polylactic acid non-woven fabric has stronger heat resistance and cold resistance and longer service life in high-temperature and low-temperature environments.
The nano zinc oxide and the nano copper oxide are both materials with long-acting disinfection and antibacterial effects, and have remarkable synergistic antibacterial action on bacterial fungi adsorbed and trapped on the filter membrane, and the antibacterial effect is stronger than that of a single nano zinc oxide antibacterial filter membrane or a single nano copper oxide antibacterial filter membrane.
The nano zinc oxide antibacterial filter membrane or the nano copper oxide antibacterial filter membrane can be obtained by loading nano zinc oxide or nano copper oxide on the surface of one side or both sides of the filter membrane, and can be obtained by coating, soaking, spraying and drying a nano zinc oxide solution or a nano copper oxide solution on the surface of one side or both sides of the filter membrane. It is not particularly limited herein.
Preferably, the nano zinc oxide antibacterial filter membrane comprises a filter membrane layer and nano zinc oxide antibacterial layers arranged on the surfaces of the two sides of the filter membrane layer.
Preferably, the nano copper oxide antibacterial filter membrane comprises a filter membrane layer and nano copper oxide antibacterial layers arranged on the surfaces of the two sides of the filter membrane layer.
The nano zinc oxide antibacterial layer or the nano copper oxide antibacterial layer can be arranged on one side or two sides of the filter membrane layer, and preferably two sides are arranged on the filter membrane layer.
Preferably, the thicknesses of the nano zinc oxide antibacterial filter membrane and the nano copper oxide antibacterial filter membrane are independently 0.1-0.5mm, such as 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm or 0.5mm, and other specific values in the numerical range can be selected, and thus, the detailed description is omitted here.
The nano zinc oxide antibacterial filter membrane and the nano copper oxide antibacterial filter membrane in the antibacterial filter element can obtain good degerming and bacteriostasis effects under the condition of being very thin, so that the cost of industrial manufacturing is greatly reduced, and contribution is made to further realizing lightness and thinness of an air conditioner.
Further preferably, the thickness of the nano zinc oxide antibacterial filter membrane and the thickness of the nano copper oxide antibacterial filter membrane are independently 0.1-0.3mm, such as 0.1mm, 0.12mm, 0.14mm, 0.15mm, 0.16mm, 0.17 mm, 0.18mm, 0.2mm, 0.3mm and the like; other specific point values within the above numerical range can be selected, and are not described in detail herein.
When the nano zinc oxide antibacterial filter membrane and the nano copper oxide antibacterial filter membrane are matched according to the specific thickness proportion, the synergistic effect on bacteriostasis is more remarkable.
Preferably, the thickness of the first polylactic acid non-woven fabric and the second polylactic acid non-woven fabric is independently 0.1-1mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8 mm, 0.9mm or 1mm, and other specific values in the numerical range can be selected, and thus detailed description is omitted here.
Further preferably, the thickness of the first polylactic acid non-woven fabric and the second polylactic acid non-woven fabric is independently 0.3-0.5mm, for example, 0.3mm, 0.35mm, 0.4mm, 0.45mm, or 0.5mm, and other specific values within the numerical range can be selected, and are not described in detail herein.
In the utility model, the filter membrane layer comprises any one of or the combination of at least two of a polypropylene filter membrane layer, a polyester filter membrane layer, a nylon filter membrane layer, a polyvinyl chloride filter membrane layer, a polytetrafluoroethylene filter membrane layer and a glass fiber filter membrane layer.
The combination of at least two of the above-mentioned materials, such as the combination of a polypropylene filter membrane layer and a polyester filter membrane layer, the combination of a polytetrafluoroethylene filter membrane layer and a glass fiber filter membrane layer, the combination of a nylon filter membrane layer and a glass fiber filter membrane layer, etc., can be selected in any combination manner, and will not be described in detail herein.
In a second aspect, the present invention provides an air conditioning system, which comprises the nano zinc oxide composite antibacterial filter element according to the first aspect.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model creatively compounds the nano zinc oxide antibacterial filter membrane and the nano copper oxide antibacterial filter membrane with the polylactic acid non-woven fabric for the antibacterial filtration of air, has more efficient and long-acting antibacterial effect compared with other types of antibacterial filter elements in the prior art, and has more specific bacteria and fungi.
The first polylactic acid non-woven fabric and the second polylactic acid non-woven fabric are used as support layers of the antibacterial filter membranes on one hand and play a role in supporting and protecting the two middle antibacterial filter membranes; on the other hand, the antibacterial filter membrane can be used as an air pre-filtering layer, so that large-particle impurities in air can be effectively blocked, and liquid is not easy to attach to the non-woven fabric due to the hydrophobic property of the non-woven fabric, so that most of bacteria can be blocked outside, the antibacterial effect of the antibacterial filter membrane is protected, the service life of the antibacterial filter membrane is prolonged, and the impact damage of the large-particle impurities on nano zinc oxide or nano copper oxide is prevented; on the other hand, compared with the common fiber film layer, the polylactic acid non-woven fabric has stronger heat resistance and cold resistance and longer service life in high-temperature and low-temperature environments.
The nano zinc oxide and the nano copper oxide are both materials with long-acting disinfection and antibacterial effects, and have remarkable synergistic antibacterial action on bacterial fungi adsorbed and trapped on the filter membrane, and the antibacterial effect is stronger than that of a single nano zinc oxide antibacterial filter membrane or a single nano copper oxide antibacterial filter membrane.
Drawings
Fig. 1 is a schematic view of a nano zinc oxide composite antibacterial filter element according to the present invention, as shown in fig. 1, wherein 1 is a first polylactic acid non-woven fabric, 2 is a second polylactic acid non-woven fabric, 3 is a nano zinc oxide antibacterial filter membrane, and 4 is a nano copper oxide antibacterial filter membrane.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Fig. 1 is a schematic view of a nano zinc oxide composite antibacterial filter element according to the present invention, as shown in fig. 1, wherein 1 is a first polylactic acid non-woven fabric, 2 is a second polylactic acid non-woven fabric, 3 is a nano zinc oxide antibacterial filter membrane, and 4 is a nano copper oxide antibacterial filter membrane.
Example 1
The embodiment provides a compound antibiotic filter core of nanometer zinc oxide, including range upon range of setting gradually: the first polylactic acid non-woven fabric with the thickness of 0.5mm, the nano zinc oxide antibacterial filter membrane with the thickness of 0.3mm, the nano copper oxide antibacterial filter membrane with the thickness of 0.3mm and the second polylactic acid non-woven fabric with the thickness of 0.5 mm.
Wherein, the nano zinc oxide antibacterial filter membrane comprises a glass fiber filter membrane (with the aperture of 0.03 mu m and the thickness of about 0.25mm, Wawa) and nano zinc oxide antibacterial layers (30 +/-10 nm, Mecline) arranged on the surfaces of the two sides of the glass fiber filter membrane; the nano-copper oxide antibacterial filter membrane comprises a glass fiber filter membrane (with the aperture of 0.03 mu m and the thickness of about 0.25mm, Wawk) and nano-copper oxide antibacterial layers (40nm, Meclin) arranged on the surfaces of the two sides of the glass fiber filter membrane.
Example 2
The embodiment provides a compound antibiotic filter core of nanometer zinc oxide, including range upon range of setting gradually: the first polylactic acid non-woven fabric with the thickness of 0.3mm, the nano zinc oxide antibacterial filter membrane with the thickness of 0.28mm, the nano copper oxide antibacterial filter membrane with the thickness of 0.28mm and the second polylactic acid non-woven fabric with the thickness of 0.3 mm.
Wherein, the nano zinc oxide antibacterial filter membrane is a product prepared by the preparation method of the nano zinc oxide antibacterial filter membrane disclosed in the patent CN107082444B example 1; the nano-copper oxide antibacterial filter membrane comprises a glass fiber filter membrane (with the aperture of 0.03 mu m and the thickness of about 0.25mm, Wawk) and nano-copper oxide antibacterial layers (40nm, Meclin) arranged on the surfaces of the two sides of the glass fiber filter membrane.
Example 3
The embodiment provides a compound antibiotic filter core of nanometer zinc oxide, including range upon range of setting gradually: the first polylactic acid non-woven fabric with the thickness of 0.7mm, the nano zinc oxide antibacterial filter membrane with the thickness of 0.28mm, the nano copper oxide antibacterial filter membrane with the thickness of 0.28mm and the second polylactic acid non-woven fabric with the thickness of 0.7 mm.
Wherein, the nano zinc oxide antibacterial filter membrane is a product prepared by the preparation method of the nano zinc oxide antibacterial filter membrane disclosed in the patent CN107082444B example 2; the nano-copper oxide antibacterial filter membrane comprises a glass fiber filter membrane (with the aperture of 0.03 mu m and the thickness of about 0.25mm, Wawk) and nano-copper oxide antibacterial layers (40nm, Meclin) arranged on the surfaces of the two sides of the glass fiber filter membrane.
Comparative example 1
The comparative example provides a nano zinc oxide composite antibacterial filter element, and the structure of the nano zinc oxide composite antibacterial filter element is different from that of the filter element in example 1 only in that a first polylactic acid non-woven fabric and a second polylactic acid non-woven fabric are replaced by melt-blown polypropylene non-woven fabrics (BFE 95-99% and Kepeng cables) with the same thick bottom, and other conditions are kept unchanged.
Comparative example 2
The comparative example provides a nano zinc oxide composite antibacterial filter element, the structure of which is different from that of the filter element in the example 1 only in that the nano copper oxide antibacterial filter membrane is replaced by the nano zinc oxide antibacterial filter membrane in the example 1, and other conditions are kept unchanged.
Comparative example 3
The comparative example provides a nano zinc oxide composite antibacterial filter element, the structure of which is different from that of the filter element in the example 1 only in that the nano zinc oxide antibacterial filter membrane is replaced by the nano copper oxide antibacterial filter membrane in the example 1, and other conditions are kept unchanged.
Antibacterial evaluation test:
(1) the composite antibacterial filter element prepared in the examples 1-3 and the comparative examples 1-3 is cut into 45mm diameter circular sheets (5 circular sheets with a diameter of 45mm in different areas are selected for each sample, and the average value is calculated), sterilized, placed in a sterilized Buchner funnel, and 600mL of bacteria-containing water containing 4000 CFU/mL of bacteria is filtered by a vacuum filtration device to pass through the filter element. The plates were then removed from the solidified TSB medium and the medium was incubated in an incubator inverted for 48h at 37 ℃. The number of colonies on the medium was then observed and counted, with fewer colonies representing better antimicrobial performance. The test bacteria include Staphylococcus aureus ATCC25923, Escherichia coli ATCC25922, Candida albicans ATCC14053, Mycobacterium tuberculosis ATCC25177 and Pseudomonas aeruginosa ATCC 27853. The results are shown in table 1 (data are presented as the average of 5 parallel runs).
TABLE 1
| Group of | ATCC25923 | ATCC25922 | ATCC14053 | ATCC25177 | ATCC27853 |
| Example 1 | 0.2 | 1.0 | 1.0 | 0.8 | 1.2 |
| Example 2 | 0.2 | 1.2 | 1.2 | 1.0 | 1.0 |
| Example 3 | 0.6 | 1.2 | 1.0 | 1.0 | 1.2 |
| Comparative example 1 | 0.2 | 1.2 | 0.8 | 1.0 | 1.2 |
| Comparative example 2 | 3.0 | 3.4 | 2.4 | 4.2 | 4.0 |
| Comparative example 3 | 3.4 | 5.0 | 4.0 | 5.2 | 5.0 |
As can be seen from the data in Table 1: as can be seen from the comparison of example 1 and comparative examples 2-3, the nano zinc oxide antibacterial filter membrane and the nano copper oxide antibacterial filter membrane in the composite antibacterial filter element have obvious synergistic effect on the inhibition of various bacteria and fungi.
(2) Evaluation of Heat resistance:
the antibacterial filter cartridges obtained in examples 1 to 3 and comparative examples 1 to 3 were allowed to stand at a constant temperature of 55 ℃ and a humidity of 95% for 90 days, and then the antibacterial ratio was evaluated by the method in (1), and the results are shown in table 2 (data are expressed as the average value of 5 parallel tests).
TABLE 2
Comparing the data in tables 1 and 2, it can be seen that the composite antibacterial filter element of the present invention has excellent heat resistance and high stability in antibacterial aspect; the data of comparative example 1 shows that the polylactic acid nonwoven fabric has stronger heat resistance, longer service life in high-temperature and high-humidity environment and more stable antibacterial performance compared with the common fiber film layer.
(3) Evaluation of Cold resistance:
the antibacterial filter cartridges obtained in examples 1 to 3 and comparative examples 1 to 3 were allowed to stand at a constant temperature of 4 ℃ and a humidity of 75% for 90 days, and then the antibacterial ratio was evaluated by the method in (1), and the results are shown in table 3 (data are expressed as the average value of 5 parallel tests).
TABLE 3
| Group of | ATCC25923 | ATCC25922 | ATCC14053 | ATCC25177 | ATCC27853 |
| Example 1 | 0.2 | 1.2 | 1.6 | 1.2 | 1.8 |
| Example 2 | 0.6 | 1.2 | 1.4 | 1.0 | 1.4 |
| Example 3 | 0.4 | 1.4 | 1.6 | 1.4 | 1.8 |
| Comparative example 1 | 3.8 | 3.6 | 4.0 | 4.8 | 5.6 |
| Comparative example 2 | 3.2 | 3.4 | 3.0 | 4.0 | 4.6 |
| Comparative example 3 | 3.6 | 5.2 | 4.0 | 5.2 | 5.2 |
Comparing the data in table 1 and table 3, it can be seen that the composite antibacterial filter element of the present invention has excellent cold resistance and high stability in antibacterial aspect; the data of comparative example 1 shows that the polylactic acid nonwoven fabric has stronger cold resistance, longer life in a low temperature environment and more stable antibacterial performance compared with a common fiber film layer.
The applicant states that the present invention is illustrated by the above embodiments, but the present invention is not limited to the above embodiments, that is, the present invention is not limited to the above embodiments. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the utility model is not described in any way for the possible combinations in order to avoid unnecessary repetition.
Claims (8)
1. A nano zinc oxide composite antibacterial filter element is characterized by comprising a first polylactic acid non-woven fabric, a nano zinc oxide antibacterial filter membrane, a nano copper oxide antibacterial filter membrane and a second polylactic acid non-woven fabric which are sequentially stacked; the nano zinc oxide antibacterial filter membrane comprises a filter membrane layer and a nano zinc oxide antibacterial layer arranged on the surface of the filter membrane layer; the nano copper oxide antibacterial filter membrane comprises a filter membrane layer and a nano copper oxide antibacterial layer arranged on the surface of the filter membrane layer.
2. The nano-zinc oxide composite antibacterial filter element as claimed in claim 1, wherein the nano-zinc oxide antibacterial filter membrane comprises a filter membrane layer and nano-zinc oxide antibacterial layers arranged on the surfaces of both sides of the filter membrane layer.
3. The nano-zinc oxide composite antibacterial filter element as claimed in claim 1, wherein the nano-copper oxide antibacterial filter membrane comprises a filter membrane layer and nano-copper oxide antibacterial layers arranged on the surfaces of both sides of the filter membrane layer.
4. The nano-zinc oxide composite antibacterial filter element of claim 1, wherein the thickness of the nano-zinc oxide antibacterial filter membrane and the thickness of the nano-copper oxide antibacterial filter membrane are independently 0.1-0.5 mm.
5. The nano-zinc oxide composite antibacterial filter element of claim 4, wherein the thickness of the nano-zinc oxide antibacterial filter membrane and the thickness of the nano-copper oxide antibacterial filter membrane are independently 0.1-0.3 mm.
6. The nano-zinc oxide composite antibacterial filter element of claim 1, wherein the first polylactic acid non-woven fabric and the second polylactic acid non-woven fabric have a thickness of 0.1 to 1mm independently.
7. The nano-zinc oxide composite antibacterial filter element of claim 1, wherein the first polylactic acid non-woven fabric and the second polylactic acid non-woven fabric have a thickness of 0.3 to 0.5mm independently.
8. The nano-zinc oxide composite antibacterial filter element according to claim 1, wherein the filter membrane layer comprises any one of or a combination of at least two of a polypropylene filter membrane layer, a polyester filter membrane layer, a nylon filter membrane layer, a polyvinyl chloride filter membrane layer, a polytetrafluoroethylene filter membrane layer and a glass fiber filter membrane layer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11866545B1 (en) | 2023-03-23 | 2024-01-09 | United Arab Emirates University | Anti-microbial bi-metallic polymeric composite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11866545B1 (en) | 2023-03-23 | 2024-01-09 | United Arab Emirates University | Anti-microbial bi-metallic polymeric composite |
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