CN105266238B - A kind of antibacterial green haze-proof mask based on graphene oxide and preparation method thereof - Google Patents
A kind of antibacterial green haze-proof mask based on graphene oxide and preparation method thereof Download PDFInfo
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- CN105266238B CN105266238B CN201510831553.6A CN201510831553A CN105266238B CN 105266238 B CN105266238 B CN 105266238B CN 201510831553 A CN201510831553 A CN 201510831553A CN 105266238 B CN105266238 B CN 105266238B
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Abstract
The invention discloses a kind of antibacterial green haze-proof mask based on graphene oxide for belonging to health care and medical protection field and preparation method thereof.The protective mask of the present invention is made up of multi-layer nonwoven fabrics, wherein contain antibacterial green composite materials graphene oxide tannic acid Nano Silver comprising layer of non-woven fabric, this material not only acts as filtering and antimicrobial double action, and it also has powerful suppression killing action to microorganisms such as bacterial fungus.Protective mask of the present invention has effects that antibacterial, dispelling abnormal flavor, and composite antibiotic layer Nonpoisonous, non-environmental-pollution, and preparation technology is simple, while having good permeability.The preparation method of anti-bacterium haze-proof mask of the present invention is simple, had not only reduced the respiratory resistance of efficient anti-influenza mask but also can avoid the cross-infection caused by mouth mask itself, with preferable market potential.
Description
Technical field
The present invention relates to antibacterial mask technical field, the anti-haze of more particularly to a kind of antibacterial green based on graphene oxide
Mouth mask and preparation method thereof.
Background technology
In recent years due to the quickening of process of industrialization, the aggravation of various pollutions makes the environment of human survival constantly deteriorate, and passes
Poison, the potential intrusion chance of germ of catching an illness increase, and respiratory infectious disease has spread speed easy soon by the spittle and air borne
The characteristics of touching wide incidence of disease of group is high causes very big threat to public health and social stability；China has many cities all to go out simultaneously
Showed a certain degree of haze weather, PM2.5 is medically referred to as pellet, be Atmospheric Grains diameter be less than or
Pollutant equal to 2.5 microns, general mouth mask filtering PM2.5 effects are poor on the market at present, it is impossible to effective to stop
PM2.5.PM2.5 particulate matters can effectively be filtered by wearing protective mask, block pathogenic microorganism intrusion human body, be prevention respiratory tract
The prevalence of infectious disease, the effective means for protecting personnel health.Related researcher studies discovery and adheres to wearing mouth mask by inquiry
Can reduce the infection of influenza, and many countries are in flu outbreak, using deposit protective mask as Non-medicine intervention means
To control the propagation of pathogenic microorganism.Anti-bacterium haze-proof mask increasingly table in terms of disease, reply burst biological pollution event is reduced
Reveal irreplaceable important function.
From 2004, since two scientists of University of Manchester are successfully separated out graphene, graphene, which already turns into, to be ground
The focus and focus studied carefully, in recent years, scientist find that graphene can not only be cut by the insertion to bacterial cell membrane,
Can also be by directly being extracted to the extensive of phospholipid molecule on cell membrane, to destroy cell membrane so as to killing bacterium, except this it
Outer its can reach 2620m because of its theoretical specific surface area2/ g, is a kind of potential sorbing material, can be at the dust-proof aspect of anti-haze
Play a role.
Nano silver particles can adhere to cell membrane surface and penetrate into bacterium, with containing in bacterial membrane in cell
The protein interaction of sulphur, when Nano silver grain enter bacterial cell formation one small-molecular-weight region bacterium center,
The bacterium group cluster.Particle attacks respiratory chain, cell division so as to ultimately result in cell death.The nanometer in bacterial cell
Particle discharges silver ion, so as to improve its bactericidal activity.Due to the larger specific surface area of nanoparticulate carriers and high table
Face activity, antiseptic can be contacted fully with bacterium, and the usage amount of antiseptic can be reduced, so silver system nano antibacterial agent is in antibacterial
Persistently, broad spectrum activity, high temperature resistant, without resistance, be not easily decomposed, many aspects such as safety and sanitation and efficiency height have great improvement,
Its anti-microbial property is better than classical antibacterial agents, can be widely applied to the antimicrobial treatment of textile, plastics, coating, water process, ceramics etc.
In.
Anti-bacterium haze-proof mask that current market is used or Patents report is in order to reach antibacterial, the purpose of anti-haze, mouth
Cover is generally made up of, and many more manipulations prepare anti-biotic material, mouth prepared by such mode clothes such as the gauzes or cotton of multilayer
Cover adds that respiratory resistance, complex procedures, cost are higher, and antiseptic due to the plyability with substrate it is not good enough, it is easily de-
Fall.Therefore, in the urgent need to a kind of preparation method is simple, dust better performances are adsorbed, antibacterial, deodorization are excellent, and for easy
It can also play the gauze mask of good isolation effect to expire in the infectiousness germ by media transmissions such as air and virus
Sufficient market needs.
The content of the invention
The technical problem to be solved in the present invention is for existing mouth mask cost at present is high, preparation section is complicated, Er Qiekang
Microbial inoculum is not good enough due to the plyability with substrate, easily comes off, it is impossible to play a part of due absorption dust, antibacterial, deodorization,
There is provided a kind of preparation method simple, adsorb dust better performances, antibacterial, deodorization are excellent, and for being easy to by air etc.
The infectiousness germ of media transmission and virus can also play the gauze mask of good isolation effect.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of green haze-proof mask based on graphene oxide, the mouth mask is made up of mouth mask filter layer, respirator belt and nose clip,
Mouth mask filter layer is the nonwoven cloth material of rectangle or square, including antibiotic layer and colloidal sol filter layer are to select medium density
And the multi-layer nonwoven fabrics with certain hydrophobic performance make, wherein there is layer of non-woven fabric to coat finite concentration certain volume
There is antibacterial green material oxidation graphene-tannic acid-Nano silver solution.
The preparation method of above-mentioned antibacterial green haze-proof mask is followed the steps below：
(1) 3 square or rectangulars for being same as size are cut out with non-woven fabrics, while cutting out one identical big
The small colloidal sol non-woven fabrics as colloidal sol filter layer, and one will be sprayed on the wherein a piece of non-woven fabrics of cut three non-woven fabrics
That determines concentration certain volume has antibacterial green material oxidation graphene-tannic acid-Nano silver solution；
(2) 3 layers of non-woven fabrics and one layer of colloidal sol non-woven fabrics are stacked according to certain order, nose clip is located in filter layer top
Heart position, is placed between several layers of nonwoven layers, and by respirator belt, two pass through mouth mask both sides duct, are stitched by certain technique
System, bonding is fixed to can obtain described antibacterial green haze-proof mask.
As limitation of the invention, the antibacterial green material used in the present invention is prepared by following technology：Oxidation
Graphene-tannic acid-Nano silver solution is according to mass ratio 1 by graphene oxide, tannic acid, silver nitrate:10~30:0.2 mixes
Together in 0.2~0.5M sodium hydroxide solution, then react 1~5h in 80~100 DEG C of lucifuges and be prepared.
Wherein preferably, antibacterial green material oxidation graphene-tannic acid-Nano Silver of the present invention is by graphite oxide
Alkene, tannic acid, silver nitrate are according to mass ratio 1:10~20:0.2 is mixed in 0.3~0.5M sodium hydroxide solution, Ran Houyu
90 DEG C of lucifuge reaction 2h centrifuge washings are prepared.
It is preferred that, nose clip is located at filter layer central upper portion position, is placed between several layers of nonwoven layers, material be metal or
The complex of metal and plastics, its existing plasticity, there is some strength again, nasal seal when being easy to wear.
It is preferred that, respirator belt is two long bands through mouth mask both sides duct.
It is preferred that, this antibacterial green haze-proof mask has 4 layers of cloth composition.
It is preferred that, the nonwoven layer for coating green antibacterial agent is the 2nd or 3 layer since close to that layer of oral cavity.
It is used as the restriction again to the present invention, antibacterial green material oxidation graphene-tannic acid-nanometer of the present invention
Silver-colored solution is mixed obtained from anti-biotic material graphene oxide-tannic acid-Nano Silver is dissolved in ethanol, water or ethanol and water
Close solution.
Antibacterial green material oxidation graphene-tannic acid-Nano silver solution used in the present invention is that concentration is 50~500 μ
G/mL water mixed liquid.
It is preferred that, antibacterial green material oxidation graphene-tannic acid-Nano silver solution is that concentration is 150~300 μ g/mL
Water mixed liquid.
Antibacterial green material oxidation graphene-tannic acid-Nano silver solution spray volume 0.03 used in the present invention~
1mL/cm2.It is preferred that, graphene oxide-tannic acid-Nano silver solution spray volume 0.05mL/cm2。
Antibacterial green mouth mask antibiotic layer of the present invention is the spraying method spraying graphene oxide-mono- compressed by air
Peaceful acid-Nano silver solution is prepared.
The beneficial effects of the invention are as follows：
(1) antibacterial green material oxidation graphite is prepared with tannic acid reduction by substrate of graphene oxide used in the present invention
The preparation method of alkene-tannic acid-Nano Silver is simple and easy to apply；
(2) antibacterial green haze-proof mask prepared by the present invention has effects that antibacterial, dispelling abnormal flavor, and nano coating is nontoxic
Nuisanceless, preparation technology is simple, while having good permeability.
(3) that a kind of simple, inexpensive, environmentally friendly antibacterial is prepared for by substrate of graphene oxide is compound by the present invention
Material oxidation graphene-tannic acid-Nano Silver is as the anti-biotic material of antibacterial mask, and wherein tannic acid not only acts as reduced nano
Silver and the effect for stabilizing it presence, can act on the effect for being conjugated with graphene and reaching dispersed graphite alkene by π-π again.We
Using this antibacterial green material prepare antibacterial mask, not only absorption dust better performances, antibacterial, deodorization is excellent, exhale
Suction drag is smaller, and isolation effect well can be also played for the infectiousness germ and virus being easy to by media transmissions such as air
Really.
(4) anti-bacterium haze-proof mask of the present invention has and cut by insertion of the graphene to bacterial cell membrane,
The effect of bacterium can also be killed by the extensive direct extraction to phospholipid molecule on cell membrane, can be connect again by silver ion
Tactile reaction causes microorganism to have composition and is destroyed or produces dysfunction, destroys the activity of cell synzyme, causes cell to lose
Lose splitting ability and it is dead.
Brief description of the drawings
Fig. 1 is the mouth mask schematic diagram of the present invention, wherein：1 is nonwoven layer；2 be to coat antibacterial green composite materials
Nonwoven layer；3 be colloidal sol nonwoven layer；4 be nonwoven layer；5 be nose clip；6 be respirator belt.
Fig. 2 is antibacterial green mouth mask oxygen antibacterial (the large intestine bar based on graphene oxide prepared in the embodiment of the present invention 3
Bacterium) experimental result：2-a is blank mouth mask group；2-b is graphene oxide-tannic acid-Nano Silver mouth mask group.
Embodiment
In order to facilitate the understanding of the purposes, features and advantages of the present invention, with reference to the specific of the present invention
Embodiment is described in detail.Many details are elaborated in the following description to fully understand the present invention.But
It is that the invention can be embodied in many other ways as described herein, those skilled in the art can be without prejudice to originally
Similar improvement is done in the case of invention intension, therefore the present invention is not limited to the specific embodiments disclosed below.
It is specific embodiment part below.
Antibacterial green haze-proof mask of the present invention is prepared according to following basic skills：
(1) 3 square or rectangulars for being same as size are cut out with non-woven fabrics, while cutting out one identical big
The small colloidal sol non-woven fabrics as colloidal sol filter layer, and one will be sprayed on the wherein a piece of non-woven fabrics of cut three non-woven fabrics
That determines concentration certain volume has antibacterial green material oxidation graphene-tannic acid-Nano silver solution；
(2) 3 layers of non-woven fabrics and one layer of colloidal sol non-woven fabrics are stacked according to certain order, nose clip is located in filter layer top
Heart position, is placed between several layers of nonwoven layers, and by respirator belt, two pass through mouth mask both sides duct, are stitched by certain technique
System, bonding is fixed to can obtain described antibacterial green haze-proof mask.
Following embodiments are built upon on the basis of above-mentioned basic skills, and antibacterial green material coating is prepared
's.
Embodiment 1
By graphene oxide, tannic acid, silver nitrate according to mass ratio 1:10:0.2 is mixed in 0.2M sodium hydroxide solution
In, then prepare antibacterial green material oxidation graphene-tannic acid-Nano Silver in 80 DEG C of lucifuge reaction 1h.
Compound concentration is the water mixed liquid of 50 μ g/mL antibacterial green material oxidation graphene-tannic acid-Nano Silver.So
Afterwards by the way of compressed air on non-woven fabrics spray antimicrobial mixed liquor, average spray amount be 0.03mL/cm2。
The nonwoven sprayed is arranged in mouth mask, the 2nd layer since close to oral cavity that layer is placed in, wherein colloidal sol without
It is the 3rd layer since close to that layer of oral cavity to spin layer of cloth, and close oral cavity is high-quality protection non-woven fabrics with outermost layer.
Embodiment 2
By graphene oxide, tannic acid, silver nitrate according to mass ratio 1:30:0.2 is mixed in 0.5M sodium hydroxide solution
In, then prepare antibacterial green material oxidation graphene-tannic acid-Nano Silver in 100 DEG C of lucifuge reaction 5h.
Compound concentration is the water mixed liquid of 500 μ g/mL antibacterial green material oxidation graphene-tannic acid-Nano Silver.So
Afterwards by the way of compressed air on non-woven fabrics spray antimicrobial mixed liquor, average spray amount be 1mL/cm2。
The nonwoven sprayed is arranged in mouth mask, the 3rd layer since close to oral cavity that layer is placed in, wherein colloidal sol without
It is the 2nd layer since close to that layer of oral cavity to spin layer of cloth, and close oral cavity is high-quality protection non-woven fabrics with outermost layer.
Embodiment 3
By graphene oxide, tannic acid, silver nitrate according to mass ratio 1:20:0.2 is mixed in 0.3M sodium hydroxide solution
In, then prepare antibacterial green material oxidation graphene-tannic acid-Nano Silver in 90 DEG C of lucifuge reaction 2h.
Compound concentration is the water mixed liquid of 150 μ g/mL antibacterial green material oxidation graphene-tannic acid-Nano Silver.So
Afterwards by the way of compressed air on non-woven fabrics spray antimicrobial mixed liquor, average spray amount be 0.5mL/cm2。
The nonwoven sprayed is arranged in mouth mask, the 2nd layer since close to oral cavity that layer is placed in, wherein colloidal sol without
It is the 3rd layer since close to that layer of oral cavity to spin layer of cloth, and close oral cavity is high-quality protection non-woven fabrics with outermost layer.
Embodiment 4
By graphene oxide, tannic acid, silver nitrate according to mass ratio 1:10:0.2 is mixed in 0.5M sodium hydroxide solution
In, then prepare antibacterial green material oxidation graphene-tannic acid-Nano Silver in 90 DEG C of lucifuge reaction 1h.
Compound concentration is the water mixed liquid of 300 μ g/mL antibacterial green material oxidation graphene-tannic acid-Nano Silver.So
Afterwards by the way of compressed air on non-woven fabrics spray antimicrobial mixed liquor, average spray amount be 0.5mL/cm2。
The nonwoven sprayed is arranged in mouth mask, the 3rd layer since close to oral cavity that layer is placed in, wherein colloidal sol without
It is the 2nd layer since close to that layer of oral cavity to spin layer of cloth, and close oral cavity is high-quality protection non-woven fabrics with outermost layer.
Embodiment 5
By graphene oxide, tannic acid, silver nitrate according to mass ratio 1:15:0.2 is mixed in 0.4M sodium hydroxide solution
In, then prepare antibacterial green material oxidation graphene-tannic acid-Nano Silver in 85 DEG C of lucifuge reaction 4h.
Compound concentration is the water mixed liquid of 200 μ g/mL antibacterial green material oxidation graphene-tannic acid-Nano Silver.So
Afterwards by the way of compressed air on non-woven fabrics spray antimicrobial mixed liquor, average spray amount be 0.6mL/cm2。
The nonwoven sprayed is arranged in mouth mask, the 2nd layer since close to oral cavity that layer is placed in, wherein colloidal sol without
It is the 3rd layer since close to that layer of oral cavity to spin layer of cloth, and close oral cavity is high-quality protection non-woven fabrics with outermost layer.
Embodiment 6
By graphene oxide, tannic acid, silver nitrate according to mass ratio 1:20:0.2 is mixed in 0.3M sodium hydroxide solution
In, then prepare antibacterial green material oxidation graphene-tannic acid-Nano Silver in 90 DEG C of lucifuge reaction 1h.
Compound concentration is the water mixed liquid of 200 μ g/mL antibacterial green material oxidation graphene-tannic acid-Nano Silver.So
Afterwards by the way of compressed air on non-woven fabrics spray antimicrobial mixed liquor, average spray amount be 0.5mL/cm2。
The nonwoven sprayed is arranged in mouth mask, the 3rd layer since close to oral cavity that layer is placed in, wherein colloidal sol without
It is the 2nd layer since close to that layer of oral cavity to spin layer of cloth, and close oral cavity is high-quality protection non-woven fabrics with outermost layer.
Embodiment 7
By graphene oxide, tannic acid, silver nitrate according to mass ratio 1:15:0.2 is mixed in 0.4M sodium hydroxide solution
In, then prepare antibacterial green material oxidation graphene-tannic acid-Nano Silver in 100 DEG C of lucifuge reaction 3h.
Compound concentration is the water mixed liquid of 250 μ g/mL antibacterial green material oxidation graphene-tannic acid-Nano Silver.So
Afterwards by the way of compressed air on non-woven fabrics spray antimicrobial mixed liquor, average spray amount be 0.5mL/cm2。
The nonwoven sprayed is arranged in mouth mask, the 3rd layer since close to oral cavity that layer is placed in, wherein colloidal sol without
It is the 2nd layer since close to that layer of oral cavity to spin layer of cloth, and close oral cavity is high-quality protection non-woven fabrics with outermost layer.
Embodiment described above only expresses the several embodiments of the present invention, and it describes more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (13)
1. a kind of antibacterial green haze-proof mask based on graphene oxide, the mouth mask is by mouth mask filter layer, respirator belt and nose clip structure
It is suitable from density into the nonwoven cloth material that, mouth mask filter layer is rectangle or square, including antibiotic layer and colloidal sol filter layer
In and with certain hydrophobic performance multi-layer nonwoven fabrics make, it is characterized in that：It is to coat concentration to be wherein to have layer of non-woven fabric
50~500 μ g/mL, volume is 0.03~1mL/cm2Antibacterial green material oxidation graphene-tannic acid-Nano silver solution.
2. the antibacterial green haze-proof mask according to claim 1 based on graphene oxide, it is characterized in that：Described mouth mask
Band is two long bands through mouth mask both sides duct.
3. the antibacterial green haze-proof mask according to claim 1 based on graphene oxide, it is characterized in that：The nose clip is set
In filter layer central upper portion position, it is placed between several layers of nonwoven layers, material is the complex of metal or metal and plastics, its
Existing plasticity, there is some strength again, nasal seal when being easy to wear.
4. the antibacterial green haze-proof mask according to claim 1 based on graphene oxide, it is characterized in that：The green is anti-
Bacterium haze-proof mask has 4 layers of cloth composition.
5. the antibacterial green haze-proof mask according to claim 1 based on graphene oxide, it is characterized in that：Spraying green is anti-
The nonwoven layer of microbial inoculum is the 2nd or 3 layer since close to that layer of oral cavity.
6. the antibacterial green haze-proof mask according to claim 1 based on graphene oxide, it is characterized in that：Antibacterial green material
Expect that graphene oxide-tannic acid-Nano Silver is according to mass ratio 1 by graphene oxide, tannic acid, silver nitrate:10~30:0.2
It is mixed in 0.2~0.5mol/L sodium hydroxide solution, then reacting 1~5h centrifuge washings in 80~100 DEG C of lucifuges prepares
And obtain.
7. the antibacterial green haze-proof mask according to claim 6 based on graphene oxide, it is characterized in that：Antibacterial green material
Expect that graphene oxide-tannic acid-Nano Silver is according to mass ratio 1 by graphene oxide, tannic acid, silver nitrate:10~20:0.2
It is mixed in 0.3~0.5mol/L sodium hydroxide solution, is then prepared in 90 DEG C of lucifuge reaction 2h centrifuge washings.
8. the antibacterial green haze-proof mask based on graphene oxide according to claim 1, it is characterized in that：Described green resists
Bacterium material oxidation graphene-tannic acid-Nano silver solution is to be dissolved in anti-biotic material graphene oxide-tannic acid-Nano Silver
Mixed solution obtained from ethanol, water or ethanol and water.
9. the antibacterial green haze-proof mask according to claim 1 based on graphene oxide, it is characterized in that：Antibacterial green material
Material graphene oxide-tannic acid-Nano silver solution is the water mixed liquid that concentration is 50~500 μ g/mL.
10. the antibacterial green haze-proof mask according to claim 9 based on graphene oxide, it is characterized in that：The green
Anti-biotic material graphene oxide-tannic acid-Nano silver solution is the water mixed liquid that concentration is 150~300 μ g/mL.
11. the antibacterial green haze-proof mask according to claim 1 based on graphene oxide, it is characterized in that：The green
The spray volume of anti-biotic material graphene oxide-tannic acid-Nano silver solution is 0.03~1mL/cm2。
12. the antibacterial green haze-proof mask according to claim 1 based on graphene oxide, it is characterized in that：Described is green
Color anti-bacterium haze-proof mask antibiotic layer is that the spraying method compressed by air sprays graphene oxide-tannic acid-Nano silver solution system
It is standby and obtain.
13. the preparation side of the antibacterial green haze-proof mask based on graphene oxide according to any one of claim 1~12
Method, it is characterised in that this method is followed the steps below：
(1) 3 square or rectangulars for being same as size are cut out with non-woven fabrics, while cutting out formed objects
Colloidal sol non-woven fabrics as colloidal sol filter layer, and be by spraying concentration on the wherein a piece of non-woven fabrics of cut three non-woven fabrics
50~500 μ g/mL, volume is 0.03~1mL/cm2Antibacterial green material oxidation graphene-tannic acid-Nano silver solution；
(2) 3 layers of non-woven fabrics and one layer of colloidal sol non-woven fabrics are stacked according to certain order, nose clip is located at filter layer central upper portion position
Put, be placed between several layers of nonwoven layers, two pass through mouth mask both sides duct by respirator belt, are sewed by certain technique, glue
Close, it is fixed to can obtain described antibacterial green haze-proof mask.
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| WO2022197545A1 (en) * | 2021-03-15 | 2022-09-22 | Aviraban, LLC | Compositions and methods for decontamination of surfaces |
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| CN104831389B (en) | 2015-05-22 | 2017-04-19 | 济南圣泉集团股份有限公司 | Multifunctional viscose and preparation method thereof |
| CN105996229A (en) * | 2016-07-22 | 2016-10-12 | 苏州艾美医疗用品有限公司 | Sound amplifying medical antibacterial mask |
| CN106510049A (en) * | 2016-12-01 | 2017-03-22 | 北京中船经济技术开发有限公司 | Sterilization and dehumidification mask with high filter element replaceability |
| CN109353094B (en) * | 2018-10-12 | 2020-09-01 | 合肥中科卫云健康科技有限公司 | Antibacterial composite fabric and preparation method thereof |
| CN111227349A (en) * | 2020-02-26 | 2020-06-05 | 上海紫河生物科技有限公司 | Bactericidal and antiviral mask |
| CN111493722A (en) * | 2020-05-30 | 2020-08-07 | 青岛玉竹叶纸品科技有限责任公司 | Antibacterial wet tissue and preparation method thereof |
| CN112641147A (en) * | 2021-01-15 | 2021-04-13 | 四川大学 | Recyclable mask, preparation method and recycling method |
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| CN1175770C (en) * | 2003-05-08 | 2004-11-17 | 中国科学院武汉植物研究所 | Making process of active gauze mask capable of filtering out pathogenic microorganism |
| KR20150117014A (en) * | 2014-04-09 | 2015-10-19 | 조주환 | A functional mask and a manufacturing process thereof |
| CN104014194A (en) * | 2014-05-22 | 2014-09-03 | 秦翠梅 | Filter material composition used for anti-haze mouth mask |
| CN104525107A (en) * | 2014-12-03 | 2015-04-22 | 杜茂龙 | Graphene-based haze-resisting mask filtering material and preparation method thereof |
| CN104831389B (en) * | 2015-05-22 | 2017-04-19 | 济南圣泉集团股份有限公司 | Multifunctional viscose and preparation method thereof |
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| WO2022197545A1 (en) * | 2021-03-15 | 2022-09-22 | Aviraban, LLC | Compositions and methods for decontamination of surfaces |
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