CN204522055U - There is the filter core of graphene oxide layer - Google Patents
There is the filter core of graphene oxide layer Download PDFInfo
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- CN204522055U CN204522055U CN201520046407.8U CN201520046407U CN204522055U CN 204522055 U CN204522055 U CN 204522055U CN 201520046407 U CN201520046407 U CN 201520046407U CN 204522055 U CN204522055 U CN 204522055U
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Abstract
The utility model discloses a kind of filter core with graphene oxide layer, comprise transpirant support, at least one of described transpirant support is provided with graphene oxide layer on the surface.For the particle of micron level, graphene oxide layer not only can very effectively be filtered out, and graphene oxide layer be combined with transpirant support after very firm.This has benefited from graphene oxide and has a large amount of oxygen-containing functional groups as carboxyl, hydroxyl etc., these functional groups have very large use: first, these functional groups can provide effective adsorption site or intercept point, namely these functional groups can be used for adsorbing microparticle, can also tackle these microparticles simultaneously; The second, these functional groups can with the functional groups on transpirant support, thus make graphene oxide layer firmly be combined on transpirant support, prevent from coming off, pollute; 3rd, graphene oxide lamella can effectively strut by these functional groups, while playing a role in filtering, can increase the smooth degree of breathing.These advantages above-mentioned are all that Graphene does not have.
Description
Technical field
The utility model relates to the filtration of particle in gas, is specifically related to a kind of filter core and its preparation method and application.
Background technology
Along with expanding economy, the environment of people's existence receives serious pollution.Particularly there is haze weather on a large scale in domestic beginning in recent years.Pollutant component in haze weather air is very complicated.The particulate that the mainly diameter particle be harmful to health is less than 10 μm, the recently especially diameter particle that is less than 2.5 μm, i.e. PM2.5.For these PM2.5, large especially to harm because load can there be a large amount of harmful carcinogens on the surface of these particles, and due to these particles very little, can be easy to enter alveolar, and then enter in blood, therefore very harmful.Traditional preventing dust haze mouth mask, pore diameter is excessive, cannot effectively stop micron-sized particle at all.Although market has also occurred many novel anti-haze mouth masks, these mouth masks have not been by increasing thickness, increase the number of plies exactly or mix other material to realize corresponding function.But the non-constant of practical effect, has many experts to test market mouth mask, and current also do not have very effective mouth mask.
Find that patent publication No. is " CN203152561U " through retrieval, disclose the utility model patent of " a kind of degerming anti-dust respirator " by name, this degerming anti-dust respirator is mainly coated with nano-graphite ene coatings or nanometer titanium dioxide coating or nano titanium oxide and nano-graphene composite coating on non-woven fabrics or gauze, the grapheme material of Nano grade has larger specific area, can adsorb the inorganic molecules particles such as some dusts in surrounding air.The technique that applicant discloses according to this patent, through experimental making and above-mentioned degerming anti-dust respirator on probation, finds that mouth mask exists following problem:
The first, above-mentioned mouth mask in use for some time, finds that the Graphene coating be attached in nonwoven surface easily drops, forms pollutant.Initial demand people does not take notice of that Graphene coating drops, and after the mouth mask more renewed, there is same problem yet, shows the poor adhesion between Graphene coating and non-woven fabrics;
The second, in use, user there will be the phenomenon of unsmooth breath to above-mentioned mouth mask;
For above two point defects, applicant has carried out long research and analysis using the preparation technology of mouth mask as starting point, does not but find that technique itself produces above-mentioned impact to Graphene coating.After technique does not find problem, continue to search defect Producing reason, final finally discovery is because the factor of grapheme material itself result in the existence of defect, be specially: bidimensional (2D) the cycle honeycomb lattice structure be made up of carbon hexatomic ring due to Graphene, result in Graphene, to ethanol solution, there is repulsive interaction, cause Graphene dispersed poor in ethanol solution, such situation makes to be difficult on the one hand to be coated on non-woven fabrics by graphene uniform, even if because poor adhesiveness is also easy to make Graphene coating drop after enclosing on the other hand.In addition, find through x-ray diffraction spectra Graphene coating, because the interlamellar spacing of Graphene is little, and in use for some time, particle to the blocking of Graphene coating formation, thus causes the unsmooth breath of user.
Summary of the invention
Technical problem: for above-mentioned technical problem, the purpose of this utility model is to provide a kind of filter core with graphene oxide layer, and filter core of the present utility model has good filtration effect and structure of filtering layer is stablized, and can not come off.
Technical scheme: a kind of filter core with graphene oxide layer of the present utility model, comprises transpirant support, and at least one of described transpirant support is provided with graphene oxide layer on the surface.
The thickness of described graphene oxide layer is 1nm-500 μm.
Described filter core also comprises air-permeable layer, and after this air-permeable layer is connected with transpirant support, graphene oxide layer is between air-permeable layer and transpirant support.
Described air-permeable layer becomes to be integrated by ultrasonic compressing with transpirant support.
Beneficial effect: graphene oxide layer and transpirant support make by the utility model becomes filter core, and for the particle of micron level, graphene oxide layer not only can very effectively be filtered out, and graphene oxide layer be combined with transpirant support after very firm.This has benefited from graphene oxide and has a large amount of oxygen-containing functional groups as carboxyl, hydroxyl etc., these functional groups have very large use: first, these functional groups can provide effective adsorption site or intercept point, namely these functional groups can be used for adsorbing microparticle, can also tackle these microparticles simultaneously; The second, these functional groups can with the functional groups on transpirant support, thus make graphene oxide layer firmly be combined on transpirant support, prevent from coming off, pollute; 3rd, graphene oxide lamella can effectively strut by these functional groups, while playing a role in filtering, can increase the smooth degree of breathing.These advantages above-mentioned are all that Graphene does not have.
Graphene oxide layer thickness in the utility model can accomplish 1nm-500 μm, and therefore, total is simply ultra-thin, easy to use, and aeration is good, breathes smooth and easy;
Filter core of the present utility model is after adding air-permeable layer, and air-permeable layer is responsible for filtering the larger particle of particle diameter, increases dust containing capacity, alleviates the filtration burden of graphene oxide layer, gives mouth mask filter core soft solid profile style attractive in appearance simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of the filter core in the utility model;
Fig. 2 is the structure comparison schematic diagram of graphene oxide and graphene film,
Fig. 3 is the infrared spectrum schematic diagram of graphene oxide and Graphene;
Fig. 4 is the schematic diagram of the x-ray diffraction spectra of graphene oxide and Graphene;
Fig. 5 is the schematic diagram of the mouth mask adopting filter core of the present utility model to make;
Fig. 6 is the anti-haze effectiveness comparison figure of the mouth mask of each mouth mask of the present utility model and other kinds;
Fig. 7 is the structural representation of air conditioner filter;
Fig. 8 is the structural representation of air purifier.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, technology of the present utility model and performance are described further.Obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.
As shown in Figure 1, filter core A of the present utility model, comprises transpirant support 1, and transpirant support 1 can be non-woven fabrics, gauze, filter paper etc., and at least one of described transpirant support 1 is provided with graphene oxide layer 2 on the surface.The process that graphene oxide layer 2 is attached on transpirant support 1 surface is: first disperseed in a solvent by graphite oxide, obtains graphene oxide solution or graphene oxide gel that mass fraction is 0.01%-5%; Secondly graphene oxide solution or graphene oxide gel are attached to the surface of transpirant support by the mode of spraying, dipping, blade coating, serigraphy, brushing, form graphene oxide layer on the surface of transpirant support; Subsequently the transpirant support being attached with graphene oxide layer is carried out drying.Wherein, when the mass fraction of above-mentioned graphene oxide is: when 0.01%-0.9%, the method for spraying or dipping is adopted to form graphene oxide layer on the surface of transpirant support.When graphene oxide mass fraction is: when 0.9%-5%, blade coating or the method such as serigraphy or brushing is adopted to form graphene oxide layer 2 on the surface of transpirant support.By the way, the thickness of the graphene oxide layer that the surface of transpirant support 1 is formed is 1nm-500 μm, the thickness of this graphene oxide layer can be 1nm, 10nm, 20nm, 50nm, 100nm, 1 μm, 10 μm, 20 μm, 50 μm, 100 μm, 200 μm, 300 μm, 400 μm, 500 μm.Also comprise air-permeable layer 3, air-permeable layer 3 adopts the material identical with transpirant support 1, such as, be the material that non-woven fabrics, gauze or filter paper etc. can make gas pass through.In the present embodiment, be only provided with above-mentioned graphene oxide layer 2 on a surface of transpirant support 1, therefore, after air-permeable layer 3 is connected 1 with transpirant support, graphene oxide layer 2 is between air-permeable layer 3 and transpirant support 1.Preferably, described air-permeable layer 3 becomes to be integrated by ultrasonic compressing with transpirant support 1.Can also adopt between air-permeable layer 3 with transpirant support 1 sew up, the mode such as bonding is connected.
Prepare the method for described filter core, comprise the following steps: step 1, graphite oxide is disperseed in a solvent, obtain graphene oxide solution or graphene oxide gel that mass fraction is 0.01%-5%;
Step 2, is attached to the surface of transpirant support by the graphene oxide solution of step 1 or graphene oxide gel by the mode of spraying, dipping, blade coating, serigraphy, brushing, forms graphene oxide layer on the surface of transpirant support; When the mass fraction of graphene oxide is: time 0.01%-0.9% (i.e. the mass fraction < 0.9% of 0.01%≤graphene oxide), the method for spraying or dipping is adopted to form graphene oxide layer on the surface of transpirant support.When graphene oxide mass fraction is: time 0.9%-5% (i.e. mass fraction≤5% of 0.9%≤graphene oxide), blade coating or the method such as serigraphy or brushing is adopted to form graphene oxide layer on the surface of transpirant support.
Step 3, carries out drying by the transpirant support of graphene oxide layer that has of the gained of step 2.
For the preparation method of above-mentioned filter core A, be described below by way of specific embodiment:
Embodiment 1
Step 1, takes 2mg graphite oxide, and is dispersed in 98mg water, and it is the graphene oxide gel of 2% that ultrasonic disperse forms mass fraction;
Step 2, cleans up non-woven fabrics with ethanol, water successively and dries.On transpirant support (transpirant support in the present embodiment is non-woven fabrics) 1, by the method for blade coating, graphene oxide gel is coated on transpirant support 1.
Step 3, dries and can obtain the graphene oxide layer 2 that thickness is 100nm;
Step 4, by air-permeable layer 3 (air-permeable layer in the present embodiment is non-woven fabrics), is fitted on graphene oxide layer 2, and by the method for ultrasonic compressing by transpirant support 1, graphene oxide layer 2 and air-permeable layer 3, carry out sideline pressing, one-tenth is integrated.
Embodiment 2
Preparation method is substantially with embodiment 1, difference is: the mass fraction of graphene oxide is 0.9%, adopt the method for serigraphy, transpirant support (transpirant support in the present embodiment is gauze) 1 forms the graphene oxide membrane that thickness is 1nm.
Embodiment 3
Preparation method is substantially with embodiment 1, and difference is: the mass fraction of graphene oxide is 5%, adopts the method for brushing, obtains at transpirant support (transpirant support in the present embodiment is non-woven fabrics) 1 graphene oxide membrane that thickness is 500 μm.
Embodiment 4
Preparation method is substantially with embodiment 1, difference is: the mass fraction of graphene oxide is 0.1%, adopt the method for dipping, transpirant support (transpirant support in the present embodiment is non-woven fabrics) 1 obtains the graphene oxide membrane that thickness is 20nm.
Embodiment 5
Preparation method is substantially with embodiment 4, and difference is: the mass fraction of graphene oxide is 0.5%, and transpirant support (transpirant support in the present embodiment is gauze) 1 obtains the graphene oxide membrane that thickness is 300nm.
Embodiment 6
Preparation method is substantially with embodiment 4, and difference is: the method adopting spraying, transpirant support (transpirant support in the present embodiment is filter paper) 1 obtains the graphene oxide membrane that thickness is 2nm.
Embodiment 7
Preparation method is substantially with embodiment 6, and difference is: the mass fraction of graphene oxide is 0.01%, obtains the graphene oxide membrane that thickness is 1nm.
Embodiment 8
Preparation method is substantially with embodiment 6, and difference is: the mass fraction of graphene oxide is 0.06%, obtains the graphene oxide membrane that thickness is 70nm.
Above-mentioned filter core A, for the particle of micron level, graphene oxide layer can very effectively be filtered out, and graphene oxide layer can be combined in securely on transpirant support and do not come off.Its reason is: as shown in Figure 2, for the structure comparison figure of graphene oxide and graphene film, clearly, graphene oxide sheet has a large amount of oxygen-containing functional groups as carboxyl (-COOH), hydroxyl (-OH) etc., and graphene film is only made up of carbon skeleton.Because graphene oxide has a large amount of oxygen-containing functional groups as carboxyl, hydroxyl etc. in the utility model, these functional groups have very large use: first, these functional groups can provide effective adsorption site or intercept point, namely these functional groups can be used for adsorbing microparticle, can also tackle these microparticles simultaneously; The second, these functional groups can combine firmly with the sense power on transpirant support, thus make graphene oxide layer firmly be combined on transpirant support, prevent from coming off, pollute; 3rd, graphene oxide lamella can effectively strut by these functional groups (about this point, can from being verified the explanation of Fig. 4 below), while playing a role in filtering, can increase the smooth degree of breathing.All these advantages are all that Graphene does not have.About functional group's problem of the Graphene of graphene oxide, also can be verified from both infrared spectrograms, as shown in Figure 3, as can be seen from Figure 3: graphene oxide INFRARED SPECTRUM has a lot of peak valley, and these peak valleys correspond to different functional groups as 3440 corresponding hydroxyls, 1725,1625 these carboxyls corresponding, etc.And in Graphene INFRARED SPECTRUM, only have carbon skeleton to shake the peak produced, there is no the peak of other oxygen-containing functional groups.
In addition, application is studied (as shown in Figure 4) the x-ray diffraction spectra of graphene oxide and Graphene, clearly, the peak position of graphene oxide is at about 10.8 °, corresponding graphene oxide interlamellar spacing is at about 0.8nm, and the peak position of Graphene is at 25.6 °, and corresponding graphene layer spacing is at about 0.35nm, therefore, the film formed by graphene oxide has better gas permeability.A large amount of functional groups that graphene oxide has result in the increase of interfloor distance.The effect of absorption interception particulate can also be played by these functional groups simultaneously; Meanwhile, by the powerful combination of these functional groups and transpirant support, the strengthening fixation to graphene oxide membrane can also be played.In addition, have benefited from these functional groups, just make graphene oxide can film forming uniformly.And above-mentioned all these be that Graphene does not have.
As described in Figure 5, mouth mask B of the present utility model, comprises ear-hanger 4, also comprises the filter core obtained by any one mode of above-described embodiment 1-8, and the two ends of ear-hanger 4 are connected with the transpirant support of filter core A and/or air-permeable layer.Ear-hanger 4 can be ultrasonic compressing with the connected mode of transpirant support and/or air-permeable layer, stitching and bonding etc.
In order to compare the filter effect of this mouth mask B, applicant have purchased the anti-haze mouth mask of comparatively conventional brand, comprise DOCTOR MASK mouth mask, 3M mouth mask, her rattan genuine piece mouth mask, be also the standby nano-graphene mouth mask of the patent system of CN203152561U according to the patent No. simultaneously, respectively these mouth masks and mouth mask of the present utility model tested.Test environment is: surrounding equipment is the particle that in 2.8 litres of air, contained diameter is greater than more than 0.5 micron.Test result sees the following form:
| Mouth mask kind | Test result |
| Nothing | Granule number is 8830 |
| DOCTORMASK mouth mask | Granule number is 6009 |
| 3M mouth mask | Granule number is 7927 |
| Her cane shield mouth mask | Granule number is 6079 |
| Nano-graphene mouth mask | Granule number is 5045 |
| Mouth mask of the present utility model | Granule number is 3465 |
In above-mentioned test result, the quantity of particle is less, shows that the intercepting efficiency of mouth mask to particle is higher.Clearly, the utility model mouth mask has best filter effect, and this mainly has benefited from graphene oxide layer, and this layer can provide less pore diameter.Meanwhile, it is smooth and easy to put on rear breathing, and this will have benefited from the ultra-thin thickness of graphene oxide layer.Therefore, mouth mask of the present utility model not only efficiently solves traditional mouth mask and up-to-date anti-haze mouth mask out, hole footpath is excessive, thus effectively cannot stop the problem of micron particles, and based on ultra-thin graphene oxide layer and only three-decker, solve the problem of other mouth mask unsmooth breath.Up-to-date mouth mask is out all on traditional mouth mask basis, and by increasing thickness or increasing the number of plies or add the means such as other material, realize so-called anti-haze, in fact real effect is: anti-haze effect is undesirable also causes unsmooth breath simultaneously.The utility model is exactly for these problems, and the gauze mask filter core of invention.
As shown in Figure 7, a kind of air conditioner filter C of the present utility model, comprises support frame 5, also comprises the filter core A obtained by any one mode of above-described embodiment 1-8, and described filter core A is fixed in support frame C.When the transpirant support of filter core A and air-permeable layer employing filter paper, filter paper is folded, to increase the filter area of filter core.
As shown in Figure 8, a kind of air purifier D of the present utility model, comprise housing 6 and blower fan 7, this housing 6 is provided with gas passage, the port of one end of gas passage is air inlet 6a, and the other end port of gas passage is gas outlet 6b, and described blower fan 7 is arranged in gas passage, also comprise the filter core A obtained by any one mode of above-described embodiment 1-8, described filter core A is arranged on the inside of gas passage.Filter core A can be installed on a shaker, when after use a period of time, Vibration on Start-up device, drives filter core A to produce vibration, is shaken off down by the particle be collected in filter core A, thus can ensure the filter efficiency of filter core A.
The foregoing is only embodiment of the present utility model; not thereby protection domain of the present utility model is limited; every utilize the utility model description to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in protection domain of the present utility model.
Claims (4)
1. there is a filter core for graphene oxide layer, comprise transpirant support, it is characterized in that: at least one of described transpirant support is provided with graphene oxide layer on the surface.
2. the filter core with graphene oxide layer according to claim 1, is characterized in that: the thickness of graphene oxide layer is 1nm-500 μm.
3. the filter core with graphene oxide layer according to claim 1, is characterized in that: also comprise air-permeable layer, and after this air-permeable layer is connected with transpirant support, graphene oxide layer is between air-permeable layer and transpirant support.
4. the filter core with graphene oxide layer according to claim 3, is characterized in that: described air-permeable layer becomes to be integrated by ultrasonic compressing with transpirant support.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104606802A (en) * | 2015-01-22 | 2015-05-13 | 东南大学 | Filter element and preparation method and application thereof |
| CN105582751A (en) * | 2015-12-17 | 2016-05-18 | 常州碳星科技有限公司 | Filter element and preparing method and application thereof |
| CN105603718A (en) * | 2016-02-05 | 2016-05-25 | 济南圣泉集团股份有限公司 | Composite fiber as well as preparation method and application thereof |
| CN110747632A (en) * | 2019-10-16 | 2020-02-04 | 上海纳米技术及应用国家工程研究中心有限公司 | Graphene-based lung protective fabric and preparation method thereof |
-
2015
- 2015-01-22 CN CN201520046407.8U patent/CN204522055U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104606802A (en) * | 2015-01-22 | 2015-05-13 | 东南大学 | Filter element and preparation method and application thereof |
| CN105582751A (en) * | 2015-12-17 | 2016-05-18 | 常州碳星科技有限公司 | Filter element and preparing method and application thereof |
| CN105582751B (en) * | 2015-12-17 | 2018-05-22 | 常州碳星科技有限公司 | Filter core and its preparation method and application |
| CN105603718A (en) * | 2016-02-05 | 2016-05-25 | 济南圣泉集团股份有限公司 | Composite fiber as well as preparation method and application thereof |
| CN105603718B (en) * | 2016-02-05 | 2019-02-19 | 济南圣泉集团股份有限公司 | A kind of composite fibre, and its preparation method and application |
| CN110747632A (en) * | 2019-10-16 | 2020-02-04 | 上海纳米技术及应用国家工程研究中心有限公司 | Graphene-based lung protective fabric and preparation method thereof |
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