CN110115886A - A kind of New Hydrogen fuel battery air filter core - Google Patents
A kind of New Hydrogen fuel battery air filter core Download PDFInfo
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- CN110115886A CN110115886A CN201910360520.6A CN201910360520A CN110115886A CN 110115886 A CN110115886 A CN 110115886A CN 201910360520 A CN201910360520 A CN 201910360520A CN 110115886 A CN110115886 A CN 110115886A
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- hydrogen fuel
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- fuel battery
- filter core
- air filter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2411—Filter cartridges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Filtering Materials (AREA)
- Nonwoven Fabrics (AREA)
Abstract
The invention discloses a kind of New Hydrogen fuel battery air filter cores, with particulate matter filter layer, adsorption cleaning layer and anti-charcoal ash filter layer, particulate matter filter layer is made of nanofiber, and adsorption cleaning layer is made of carbon nano-fiber aeroge, and anti-charcoal ash filter layer is made of nanofiber.Carbon nano-fiber aeroge has the characteristics that ultralight amount, superhigh specific surface area, has superelevation adsorption rate for harmful substances such as sulfur dioxide, ammonias；Presoma is prepared using the method for graphene doping polyacrylonitrile, carbon nano-fiber aeroge is prepared after being carbonized, the mechanical strength of aeroge is improved, meets application request；Using multilayer purification techniques, particulate matter filter layer is made of nano fibrous membrane, can effectively cross solid and oiliness particulate matter in air filtering, to 0.3 micron of partial size or more of particulate matter, filter efficiency reaches 99.5%, while the air drag of nano fibrous membrane is low, it is ensured that air quickly through.
Description
Technical field
The present invention relates to hydrogen fuel cell technical fields, and in particular to a kind of New Hydrogen fuel battery air filter core.
Background technique
Hydrogen fuel cell is a kind of clean energy resource, it constantly sucks the oxygen in atmosphere, and oxygen react producing electricl energy with hydrogen.
Important component of the Hydrogen Fuel-cell Vehicles as new-energy automobile receives give more sustained attention and achieve breakthrough grind in recent years
Hair progress.Different from traditional energy automobile, hydrogen fuel cell is higher to the degree of purity requirement of sucking air, is present in atmosphere
All kinds of acid, alkaline gas, such as NOX、NH3、SOX, sulfide, hydrocarbon, volatile organic matter etc., can be to hydrogen fuel
The electrode of battery has a negative impact, and while causing cell output to reduce, can also shorten the service life of battery.Cause
This, the air filter system for filtering these pernicious gases is indispensable component part in hydrogen fuel cell system.
China has a vast territory, and north and south environmental difference is larger, and Hydrogen Fuel-cell Vehicles, which will be popularized just, must adapt to various environment.This
The air cleaning system of hydrogen fuel cell is required to allow for the effectively harmful substances such as filtering and sulfur dioxide absorption, ammonia,
To guarantee that hydrogen fuel cell normal table works.It therefore is most for hydrogen fuel cell to the tolerance degree of bad air quality
Basic requirement.This requires must develop a kind of efficient hydrogen fuel cell air purifying filter core.Hydrogen Fuel-cell Vehicles
The core of air filter system is air purifying filter core.Filter core not only need to allow air can inflow and outflow in the case where lower resistance, but also
It needs in the very short time that air flows through simultaneously, the pernicious gas in adsorption gas flow, development difficulty is very big.Hydrogen fuel cell is empty
Filter core technology worldwide also belongs to the field compared with forward position, and external minority product was attempted to remove using chemical reaction harmful
The filter type of gas.But the chemical pretreatment of filter material, long-term preservation；Deacidification is gone to have with what the properties such as alkali completely dispensed with simultaneously
Evil gas, has resulted in the at high cost of air filter core, removal efficiency is low, and effect is poor, it is difficult to it is universal to obtain market.In addition, there is use
Absorbent charcoal material adsorbs the harmful substances such as sulfur dioxide, ammonia as adsorbent, but active Carbon Materials are easy absorption and satisfy
With adsorption efficiency is low.
Summary of the invention
It is an object of the present invention to provide a kind of New Hydrogen fuel battery air filter cores, for the deficiency of the above method, invention one
Kind is not easy the New Hydrogen fuel battery air filter core of adsorption saturation, lower resistance.
A kind of technical solution of the invention is:
A kind of New Hydrogen fuel battery air filter core has particulate matter filter layer, adsorption cleaning layer and anti-charcoal ash filter layer,
The particulate matter filter layer, adsorption cleaning layer, anti-charcoal ash filter layer are by being outside to inside arranged successively and mutually pasting between adjacent layer
Attached, the particulate matter filter layer is made of nanofiber, and the adsorption cleaning layer is made of carbon nano-fiber aeroge, described anti-
Charcoal ash filter layer is made of nanofiber.
Further, the nanofiber is polyurethane, polyamide, polyester, polypropylene, any one in polyacrylonitrile
Or it is a variety of.
Further, the nanofiber is prepared by electrospinning process, and electrostatic potential is 12-20kV, and spinning distance is
12-18cm。
Further, the diameter of the nanofiber is 100-300nm, porosity 30-60%.
Further, the carbon nano-fiber aeroge is by polyacrylonitrile and graphene composite nano-fiber material through being carbonized
After be made.
Further, the carbon nano-fiber aeroge is prepared by electrostatic spinning and freeze-drying method: using Static Spinning
Silk method prepares carbon nano-fiber presoma, first configures the polyacrylonitrile solution of 10-15% concentration, the graphene of 0.1-1% is added,
Solvent is n,N-Dimethylformamide, receives polyacrylonitrile/graphene nano fiber using water-bath, receives what is obtained after spinning 3h
Rice fibre migration is freeze-dried 48h into cylindrical plastic culture dish mold, obtains having the poly- of three-dimensional structure after drying
Acrylonitrile/graphene composite nano fiber aeroge is risen to then again in high temperature process furnances with the heating rate of 1 DEG C/min
300 DEG C, and keep 1h to carry out pre-oxidation treatment at this temperature, then under nitrogen atmosphere protection, with the heating rate of 5 DEG C/min
900 DEG C are risen to, keeps 1h to carry out carbonization treatment at this temperature, carbon nano-fiber aeroge is made.
Further, the density of the carbon nano-fiber aeroge is 20-40mg/cm3, specific surface area 500-
1000m2g-1。
Further, the New Hydrogen fuel battery air filter core further includes two blocks of support protective layers, two pieces of support protections
Layer is separately positioned on the outside of the particulate matter filter layer and anti-charcoal ash filter layer.
Further, the support protective layer uses non-woven fabrics sealing material.
Further, the non-woven fabrics sealing material is polypropylene.
The present invention provides a kind of New Hydrogen fuel battery air filter cores, its advantage is that:
1. the present invention has the carbon nano-fiber aeroge of three-dimensional structure, the airsetting glue material by electrostatic spinning technique preparation
Material has ultralight amount (20-40mg/cm3), superhigh specific surface area (500-1000m2g-1) the characteristics of, for sulfur dioxide, ammonia
Etc. harmful substances have superelevation adsorption rate, solve the problems, such as that active Carbon Materials are easy adsorption saturation.
2. the present invention prepares presoma using the method for graphene doping polyacrylonitrile (PAN), carbon is prepared after being carbonized and is received
Rice fiber aeroge, improves the mechanical strength of aeroge, meets application request.
3. the present invention uses multilayer purification techniques, particulate matter filter layer is made of nano fibrous membrane, can effectively cross air filtering
In solid and oiliness particulate matter, to 0.3 micron of partial size or more of particulate matter, filter efficiency reaches 99.5%, while Nanowire
Tie up film air drag it is low, it is ensured that air quickly through.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other
Attached drawing.Wherein,
Fig. 1 is a kind of structural schematic diagram of New Hydrogen fuel battery air filter core of the present invention, in which: 1 is support
Protective layer, 2 be particulate matter filter layer, 3 be adsorption cleaning layer, 4 be anti-charcoal ash filter layer；
Fig. 2 is the scanning electron microscope (SEM) photograph of polyurethane (PU) nano fibrous membrane；
Fig. 3 is the cross-sectional scans electron microscope of carbon nano-fiber aeroge.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, With reference to embodiment
The present invention is described in further detail with attached drawing.
As shown in Figure 1, a kind of New Hydrogen fuel battery air filter core includes three layers: purifying filter element includes particulate matter filter layer
2, adsorption cleaning layer 3 and anti-charcoal ash filter layer 4.Particulate matter filter layer 2 by diameter 100-300nm, porosity 30-60% nanometer
Tunica fibrosa is constituted, and nanofiber membrane porosity is high, aperture is small, can effectively cross solid and oiliness particulate matter in air filtering；Absorption
Purifying layer 3 is by density 20-40mg/cm3, specific surface area 500-1000m2g-1Carbon nano-fiber aerogel material constitute, airsetting
Glue has higher mechanical strength, and large specific surface area, unit mass large amount of adsorption, porosity is high, is conducive to air flowing；Anti- charcoal ash
Filter layer 4 is equally made of the nano fibrous membrane of diameter 100-300nm, porosity 30-60%, and nano fibrous membrane can effective mistake
Carbon nano-fiber aeroge breakage bring ashes is filtered, the secondary pollution of filtered air is prevented；Particulate matter filter layer 2, absorption
Purifying layer 3 and anti-charcoal ash filter layer 4 are by being outside to inside arranged successively and adjacent layer mutually attaches.
New Hydrogen fuel battery air filter core further includes two layers of support protective layer 1, and support protective layer 1 is sealed using non-woven fabrics
Material is respectively placed in the outermost layer of purification composite layer two sides, plays support and prevents the intracorporal active carbon particle escape product of chamber.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawings and examples
Further illustrate technical solution of the present invention.But the present invention is not limited to listed embodiments, should also be included in institute of the present invention
It is required that interest field in other any well known change.
Firstly, " one embodiment " or " embodiment " referred to herein, which refers to, may be included at least one realization side of the invention
A particular feature, structure, or characteristic in formula." in one embodiment " that different places occur in the present specification not refers both to
The same embodiment, nor the individual or selective embodiment mutually exclusive with other embodiments.
Secondly, the present invention is described in detail using structural schematic diagram etc., when describing the embodiments of the present invention, for convenient for saying
Bright, schematic diagram can disobey general proportion and make partial enlargement, and the schematic diagram is example, should not limit the present invention herein
The range of protection.In addition, the three-dimensional space of length, width and depth should be included in actual fabrication.
Embodiment 1
The implementation case shows a kind of New Hydrogen fuel battery air filter core, and basic constitute is particulate matter filter layer 2, absorption
Purifying layer 3 and anti-charcoal ash filter layer 4 composition.In order to enhance the support and protection to filter core, it is equipped in the outermost layer of purifying filter element
Supporting layer 1, the specific constructive form of purifying filter element are the plank frame folded.As shown in Figure 1, purifying filter element is multilayered structure,
Specifically by support protective layer 1, particulate matter filter layer 2, adsorption cleaning layer 3, is arranged successively group at anti-charcoal ash filter layer 4 from outside to inside
At, purify air when air pass sequentially through support protective layer 1, particulate matter filter layer 2, adsorption cleaning layer 3, anti-charcoal ash filter layer 4,
Protective layer 1 is supported, finally flows out, achievees the purpose that air cleaning from the other side of filter core.
Support protective layer 1 is arranged in one layer of outermost of purifying filter element, using polypropylene (PP) non-woven fabrics as support and
Protective materials.
Particulate matter filter layer 2 is made of next to support protective layer 1, the layer polyurethane (PU) nano fibrous membrane, specifically
Preparation method and technique are as follows: prepared using method of electrostatic spinning, the concentration of polyurethane spinning solution is 13%, and electrostatic potential is
12kV, spinning distance are 12cm, and the diameter distribution of nanofiber obtained is 210nm or so under this process condition, are put down
Equal aperture is 1.2 μm, porosity 42%.As shown in Fig. 2, obtained with a thickness of 0.3g/m2Nano fibrous membrane 30L/min's
99.5% can reach to the interception rate of the sodium chloride particle of 0.3 μ m diameter under flow.The nanofiber of particulate matter filter layer 2 is straight
Diameter, aperture, porosity and film thickness can be selected according to the actual conditions of air quality.
Adsorption cleaning layer 3 is located next to particulate matter filter layer 2, which is made of carbon nano-fiber aeroge, is purification air
Middle harmful substance (NOX、NH3、SOX, sulfide, hydrocarbon, volatile organic matter etc.) most important structure sheaf.Specifically
Preparation method and technique are as follows: carbon nano-fiber presoma is prepared using method of electrostatic spinning, configures the polypropylene of 10% concentration first
0.5% graphene (Graphene) is added in nitrile (PAN) solution, and solvent is n,N-Dimethylformamide (DMF), utilizes water-bath
PAN/ graphene nano fiber is received, it is (straight that the nanofiber obtained after spinning 3h is transferred to cylindrical plastic culture dish mold
Diameter 3.5cm, high 1.8cm) in, it is freeze-dried 48h, obtains the PAN/ graphene composite Nano with three-dimensional structure after drying
Fiber aeroge rises to 300 DEG C then in high temperature process furnances with the heating rate of 1 DEG C/min, and keep at this temperature
1h carries out pre-oxidation treatment, then under nitrogen atmosphere protection, rises to 900 DEG C with the heating rate of 5 DEG C/min, protect at this temperature
It holds 1h and carries out carbonization treatment, as shown in figure 3, carbon nano-fiber aeroge, density 24.48mg/cm is made3, specific surface area
953m2g-1.The density and specific surface area of carbon nano-fiber aeroge can be according to the actual conditions of air quality, required absorption
Amount and adsorption efficiency are selected.
Closely adsorption cleaning layer 3, the layer are also to be made of polyurethane (PU) nano fibrous membrane to anti-charcoal ash filter layer 4, at this
In example, selection and identical nanofiber in particulate matter filter layer are also structure shown in Fig. 3.
Above-mentioned support protective layer 1, particulate matter filter layer 2, adsorption cleaning layer 3, anti-charcoal ash filter layer 4 and another support protection
Layer 1, mutually closely, do not interspace between adjacent layer.
It should be noted that the Novel air filter element of hydrogen fuel cell can be according to actual air quality, flow and right
The requirement of various pernicious gas adsorbances and adsorption efficiency selects the particulate matter filter layer 2 and adsorption cleaning layer 3 of different performance,
To be optimal most economical product development purpose.
In conclusion being prepared the invention discloses a kind of New Hydrogen fuel battery air filter core by electrostatic spinning technique
Carbon nano-fiber aeroge with three-dimensional structure, the aerogel material have ultralight amount (20-40mg/cm3), superelevation specific surface
Product (500-1000m2g-1) the characteristics of, there is superelevation adsorption rate for harmful substances such as sulfur dioxide, ammonias, solve common work
Property Carbon Materials be easy adsorption saturation the problem of；Presoma is prepared using the method for graphene doping polyacrylonitrile (PAN), through being carbonized
After prepare carbon nano-fiber aeroge, improve the mechanical strength of aeroge, meet application request；Skill is purified using multilayer
Art, filter layer are made of nano fibrous membrane, can effectively cross solid and oiliness particulate matter in air filtering, to 0.3 micron of partial size with
On particulate matter, filter efficiency reaches 99.5%.Simultaneously nano fibrous membrane air drag it is low, it is ensured that air quickly through.
It should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to preferable
Embodiment describes the invention in detail, those skilled in the art should understand that, it can be to technology of the invention
Scheme is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered in this hair
In bright scope of the claims.
Claims (10)
1. a kind of New Hydrogen fuel battery air filter core, it is characterised in that: have particulate matter filter layer, adsorption cleaning layer and anti-charcoal
Grey filter layer, the particulate matter filter layer, adsorption cleaning layer, anti-charcoal ash filter layer by be outside to inside arranged successively and adjacent layer it
Between mutually attach, the particulate matter filter layer is made of nanofiber, and the adsorption cleaning layer is by carbon nano-fiber aeroge structure
At the anti-charcoal ash filter layer is made of nanofiber.
2. a kind of New Hydrogen fuel battery air filter core according to claim 1, it is characterised in that: the nanofiber is
Polyurethane, polyamide, polyester, polypropylene, any one or more in polyacrylonitrile.
3. a kind of New Hydrogen fuel battery air filter core according to claim 2, it is characterised in that: the nanofiber by
Electrospinning process preparation, electrostatic potential is 12-20kV, and spinning distance is 10-18m.
4. a kind of New Hydrogen fuel battery air filter core according to claim 3, it is characterised in that: the nanofiber
Diameter is 100-300nm, porosity 30-60%.
5. a kind of New Hydrogen fuel battery air filter core according to claim 1, it is characterised in that: the carbon nano-fiber
Aeroge is made after being carbonized by polyacrylonitrile and graphene composite nano-fiber material.
6. a kind of New Hydrogen fuel battery air filter core according to claim 5, it is characterised in that: the carbon nano-fiber
Aeroge is prepared by electrostatic spinning and freeze-drying method: being prepared carbon nano-fiber presoma using method of electrostatic spinning, is first configured
The graphene of 0.1-1% is added in the polyacrylonitrile solution of 10-15% concentration, and solvent is n,N-Dimethylformamide, utilizes water-bath
Polyacrylonitrile/graphene nano fiber is received, the nanofiber obtained after spinning 3h is transferred to cylindrical plastic culture dish mould
In tool, it is freeze-dried 48h, obtains the polyacrylonitrile with three-dimensional structure/graphene composite nano fiber airsetting after drying
Glue rises to 300 DEG C then again in high temperature process furnances with the heating rate of 1 DEG C/min, and it is pre- to keep 1h to carry out at this temperature
Oxidation processes, then under nitrogen atmosphere protection, 900 DEG C are risen to the heating rate of 5 DEG C/min, keep 1h to carry out at this temperature
Carbon nano-fiber aeroge is made in carbonization treatment.
7. a kind of New Hydrogen fuel battery air filter core according to claim 6, it is characterised in that: the carbon nano-fiber
The density of aeroge is 20-40mg/cm3, specific surface area 500-1000m2g-1。
8. a kind of New Hydrogen fuel battery air filter core according to claim 1, it is characterised in that: the novel hydrogen fuel
Battery air filter core further includes two blocks of support protective layers, and two blocks of support protective layers are separately positioned on the particulate matter filter layer and prevent
The outside of charcoal ash filter layer.
9. New Hydrogen fuel battery air filter core according to claim 8, it is characterised in that: the support protective layer uses
Non-woven fabrics sealing material.
10. New Hydrogen fuel battery air filter core according to claim 9, it is characterised in that: the non-woven fabrics sealing material
Material is polypropylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910360520.6A CN110115886A (en) | 2019-04-30 | 2019-04-30 | A kind of New Hydrogen fuel battery air filter core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910360520.6A CN110115886A (en) | 2019-04-30 | 2019-04-30 | A kind of New Hydrogen fuel battery air filter core |
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| CN110115886A true CN110115886A (en) | 2019-08-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112477333A (en) * | 2020-11-30 | 2021-03-12 | 苏州市新桃纺织有限公司 | Gel type wave-absorbing fabric and preparation method thereof |
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| US8226752B2 (en) * | 2010-04-29 | 2012-07-24 | Hai Xu | Method and apparatus for air purification |
| CN105923622A (en) * | 2016-05-10 | 2016-09-07 | 复旦大学 | Polyacrylonitrile nanofiber/polyimide-based carbon aerogel adsorption material and preparation method thereof |
| CN206714154U (en) * | 2017-02-14 | 2017-12-08 | 苏州大学 | A kind of gas permeability mouth mask for intercepting particulate matter |
| CN108654247A (en) * | 2018-07-03 | 2018-10-16 | 合肥威尔燃油系统股份有限公司北京分公司 | A kind of air purifying filter core for hydrogen fuel cell |
-
2019
- 2019-04-30 CN CN201910360520.6A patent/CN110115886A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8226752B2 (en) * | 2010-04-29 | 2012-07-24 | Hai Xu | Method and apparatus for air purification |
| CN105923622A (en) * | 2016-05-10 | 2016-09-07 | 复旦大学 | Polyacrylonitrile nanofiber/polyimide-based carbon aerogel adsorption material and preparation method thereof |
| CN206714154U (en) * | 2017-02-14 | 2017-12-08 | 苏州大学 | A kind of gas permeability mouth mask for intercepting particulate matter |
| CN108654247A (en) * | 2018-07-03 | 2018-10-16 | 合肥威尔燃油系统股份有限公司北京分公司 | A kind of air purifying filter core for hydrogen fuel cell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112477333A (en) * | 2020-11-30 | 2021-03-12 | 苏州市新桃纺织有限公司 | Gel type wave-absorbing fabric and preparation method thereof |
| CN112477333B (en) * | 2020-11-30 | 2023-11-10 | 浙江鑫海纺织有限公司 | Gel type wave-absorbing fabric and preparation method thereof |
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Application publication date: 20190813 |