WO2018006745A1 - Dispositif de filtration d'air utilisant un revêtement de graphène, et système - Google Patents

Dispositif de filtration d'air utilisant un revêtement de graphène, et système Download PDF

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Publication number
WO2018006745A1
WO2018006745A1 PCT/CN2017/090724 CN2017090724W WO2018006745A1 WO 2018006745 A1 WO2018006745 A1 WO 2018006745A1 CN 2017090724 W CN2017090724 W CN 2017090724W WO 2018006745 A1 WO2018006745 A1 WO 2018006745A1
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WIPO (PCT)
Prior art keywords
graphene
filter
layer
polypropylene
filter cloth
Prior art date
Application number
PCT/CN2017/090724
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English (en)
Chinese (zh)
Inventor
张麟德
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张麟德
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Filing date
Publication date
Application filed by 张麟德 filed Critical 张麟德
Publication of WO2018006745A1 publication Critical patent/WO2018006745A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • 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

Definitions

  • the utility model relates to the technical field of air filtration, in particular to an air filtering device and system based on a coating of graphene materials.
  • Air pollutants can often be divided into two categories: aerosol atmospheric pollutants and gaseous atmospheric pollutants.
  • the chemical composition of aerosol air pollutants often includes various salts (cations: ammonium, potassium, sodium, magnesium, calcium, etc.; anions: sulfate, nitrate, chloride, organic acid, etc.), metal Particles, dust, inorganic carbon particles (such as black carbon, high molecular carbon particles, etc.), various organic substances (VOCs droplets, PAHs, pollen, polymer particles, etc.), sulfuric acid vapor, etc.; VOCs such as nitrogen oxides, sulfur oxides, carbon monoxide, lower alkanes, hydrogen halides, hydrogen sulfide, ammonia, organic amines, and the like are included.
  • the air filter device widely used in the market has a general effect. The main reason is that the air filter device cannot achieve complete dead adsorption of pollutants, and often causes secondary pollution and loses its effectiveness.
  • the technical problem to be solved by the present invention is to propose an air filtering device and system based on a graphene material coating.
  • the technical means provided by the present invention is to provide an air filtering device, comprising a support layer and an outer cladding layer, and further comprising a filter layer disposed inside the outer cladding layer; the outer surface of the filter layer is provided with graphene The material coating, the filter layer, the graphene material coating and the support layer are all disposed inside the outer cladding.
  • the support layer comprises at least two layers disposed on opposite sides of the filter layer in the thickness direction.
  • the graphene material coating has a thickness of 3-200 um.
  • the graphene material coating is composed of graphene and/or functionalized graphene; the graphene comprises one or more of a single layer, a plurality of layers, and an oligo graphene; the functionalized graphene Including aminated graphene, carboxylated graphene, cyano graphene, nitro graphene, borate-based graphene, phosphate-based graphene, Hydroxylated graphene, fluorenated graphene, methylated graphene, allylated graphene, trifluoromethylated graphene, dodecylated graphene, octadecylated graphene, graphene oxide One or more of fluorinated graphene, graphene bromide, graphene chloride and graphene iodide.
  • the support layer is made of a polypropylene needle punched/spunlace nonwoven fabric, a polypropylene staple fiber filter cloth, a polypropylene long fiber filter cloth, a polyphthalate type needle punched/spunlace nonwoven fabric, and a polyester fiber.
  • the outer layer is made of pure cotton gauze, pure cotton crepe cloth, pure cotton long fiber filter cloth, pure cotton staple fiber filter cloth, polypropylene long fiber filter cloth, polypropylene staple fiber filter cloth, polypropylene frame and polyethylene frame. One or several.
  • the present invention also provides an air filtering system provided with any of the above air filtering devices.
  • the utility model provides an air filtering device based on a graphene material coating, which comprises a filter layer with a coating of a graphene material on an outer surface, a support layer and an outer cladding layer. On the one hand, it enhances the filtration of pollutants in the atmosphere, on the other hand, it effectively avoids secondary pollution. Specifically:
  • Graphene material is a two-dimensional material with large specific surface area and good affinity for free radicals. Therefore, it has good adsorption and can effectively adsorb gas pollutants in atmospheric pollutants.
  • the graphene material provides a Pz orbital for each carbon and the electrons participate in the formation of a large ⁇ bond on the surface of the graphene
  • the surface of the entire graphene can be considered to be covered by a large ⁇ bond
  • the surface of the PAHs is also With a large ⁇ bond system, when the PAHs are in contact with the graphene, the ⁇ bonds of the two systems overlap, thereby forming a strong ⁇ - ⁇ interaction force between the graphene and the PAHs, and thus the graphene material for the PAHs
  • the adsorption is firm and it is not easy to break off.
  • the support layer and the outer cladding in the air filtering device based on the graphene material coating are all ventilating structural layers with certain supporting ability, which can ensure the smooth circulation of air and at the same time filter aerosol pollutants for large-sized particles. Intercepting effect; for smaller size particles, the particles enter the structure of the air filter device, and are disturbed by different air flows when flowing therein, and finally lose kinetic energy to stay in the filter layer provided with the graphene material coating; Smaller size particles, which are adsorbed by a coating of graphene material.
  • Functionalized graphene in graphene materials provides stronger adsorption for specific compounds This is because the functional groups on the functionalized graphene are directional and can form chemical bonds (ion bonds, covalent bonds or secondary bonds) with chemical species of specific structures, thereby making the chemical species formation chemistry of such specific structures. Adsorption, compared to traditional physical adsorption, chemical adsorption has higher adsorption strength and is also more targeted.
  • the air filtering device of the present invention can simultaneously adsorb gas-based pollutants and aerosol-like pollutants in atmospheric pollutants, and has a strong adsorption effect and is not easy to fall off.
  • the combination of various graphene materials can be targeted according to the different components of atmospheric pollutants, so that the filtration effect is further enhanced. Therefore, the gas filtering device of the present invention enhances the filtering effect on pollutants in the atmosphere on the one hand, and effectively adsorbs semi-volatile compounds such as PAHs and VOCs on the aerosol-like pollutants on the other hand, and further Avoid secondary pollution.
  • the utility model also provides an air filtering system, which is provided with any of the above air filtering devices. Since the system is provided with the above air filtering device, the production system also has corresponding technical effects.
  • FIG. 1 is a schematic cross-sectional view of an air filtering device of the present invention.
  • the utility model discloses an air filtering device and a system based on a graphene material coating, and those skilled in the art can learn from the contents of the paper and appropriately improve the process parameters. It is to be understood that all such alternatives and modifications are obvious to those skilled in the art and are considered to be included in the present invention.
  • the structure and application of the present invention have been described in the preferred embodiments, and it is obvious that the methods and applications described herein may be modified or appropriately modified and combined without departing from the spirit, scope and scope of the present invention. The invention is implemented and applied.
  • FIG. 1 is a schematic cross-sectional view showing a specific embodiment of an air filtering device according to the present invention.
  • an air filtering device comprising a support layer 3 and an outer cladding 4, further comprising a filter layer 1 disposed inside the outer cladding layer, the outer surface of the filter layer being provided with graphene a material coating 2, the filter layer 1, the graphene material coating 2 and the support layer 3 are both disposed in the outsourcing Inside the layer 4, the support layer includes at least two, and is disposed on both sides of the filter layer in the thickness direction.
  • Graphene material is a two-dimensional material with large specific surface area and good affinity for free radicals. Therefore, it has good adsorption property and can effectively adsorb gas pollutants in atmospheric pollutants, especially PAHs. Semi-volatile compounds and VOCs, etc., to avoid secondary pollution.
  • the support layer 3 and the outer cladding 4 in the air filtering device based on the graphene material coating 2 are both ventilating structural layers having a certain supporting ability, which can ensure the smooth circulation of air and at the same time filter aerosol-like pollutants, for large
  • the size of the particles produces an intercepting effect, which functions as a filter aid layer and enhances the filtering effect on pollutants in the atmosphere. For smaller size particles, the particles enter the structure of the air filter device and are subjected to different air flows when flowing therein. The interference eventually loses kinetic energy in the filter layer 1; for smaller sized particles, the graphene material coating 2 adsorbs it.
  • the graphene material coating may be located on one side of the filter layer or on both sides.
  • Functionalized graphene in graphene materials can have a stronger adsorption effect on specific compounds because functional groups on functionalized graphene have directivity and can form chemical bonds with chemical species of specific structures (ion bonds, The covalent bond or the secondary bond), so that the chemical species of the specific structure form chemisorption, and the chemical adsorption has higher adsorption intensity and is more targeted than the conventional physical adsorption.
  • the air filtration effect is best when the thickness of the graphene material coating is 3-200 um.
  • the thick coating of the graphene material will cause the graphene material to fall off during use of the air filter device, which is too thin to achieve the best effect of filtering the pollutants in the air.
  • the support layer is preferably composed of a material having good gas permeability, filterability, and supportability, such as a polypropylene needle punch/spunlace nonwoven fabric, a polypropylene staple fiber filter cloth, and the like.
  • the outer cladding layer serves as the outermost layer covering structure, and has the effect of stably forming the filter layer and the support layer.
  • the material is mainly made of a gas permeable and structurally strong material, which can stabilize the filter layer and the support layer and maintain the filtering effect. Therefore, the outer layer is composed of a kind of pure cotton gauze, pure cotton crepe cloth, pure cotton long fiber filter cloth and the like with good gas permeability and structural strength.
  • an air filtration system comprising the air filtration device described above.
  • the air filtering device described above has the aforementioned advantageous effects, so that the air filtering system including the above air filtering device also has corresponding advantageous effects.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Filtering Materials (AREA)

Abstract

L'invention concerne un dispositif de filtration d'air utilisant un revêtement de graphène. Le dispositif de filtration d'air comprend : des couches de support (3), des revêtements extérieurs (4) et une couche de filtration (1) disposée sur les côtés intérieurs des revêtements extérieurs (4). Des revêtements de graphène (2) sont disposés sur une surface extérieure de la couche de filtration. La couche de filtration (1), les revêtements de graphène (2) et les couches de support (3) sont tous disposés sur les côtés intérieurs des revêtements extérieurs (4). Le dispositif de filtration d'air peut adsorber efficacement les polluants gazeux des polluants atmosphériques et, spécifiquement, adsorber totalement des composés partiellement volatils tels que PAHs et d'autres polluants tels que les COV, empêchant la pollution secondaire.
PCT/CN2017/090724 2016-07-08 2017-06-29 Dispositif de filtration d'air utilisant un revêtement de graphène, et système WO2018006745A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201620715763 2016-07-08
CN201620715763.9 2016-07-08

Publications (1)

Publication Number Publication Date
WO2018006745A1 true WO2018006745A1 (fr) 2018-01-11

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109772146A (zh) * 2019-03-11 2019-05-21 广东顺德佑力电气科技有限公司 空气净化材料及其制备方法和应用
CN111203033A (zh) * 2020-03-17 2020-05-29 广州康滤净化科技有限公司 一种石墨烯阻垢抗菌复合纤维滤芯及其制备方法
CN111672203A (zh) * 2020-07-13 2020-09-18 山东中恒景新碳纤维科技发展有限公司 一种过滤材料及其制备方法和应用

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014088556A1 (fr) * 2012-12-04 2014-06-12 Empire Technology Development, Llc Faisceau de nanotubes de graphène pour filtration de gaz
WO2014171599A1 (fr) * 2013-04-17 2014-10-23 한양대학교 산학협력단 Membrane de séparation composite contenant une couche de revêtement d'oxyde de graphène/acide de bile ou un sel de ceux-ci et procédé de fabrication associé
CN204307452U (zh) * 2014-03-05 2015-05-06 江苏创云环保科技有限公司 一种用于空气净化机的新型过滤材料
CN205216513U (zh) * 2015-12-17 2016-05-11 唐山艾米电子科技有限公司 一种石墨烯复合过滤网
CN205340344U (zh) * 2016-02-03 2016-06-29 山东巴锐汽车零部件股份有限公司 一种含石墨烯材料和纳米材料的空气过滤布

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014088556A1 (fr) * 2012-12-04 2014-06-12 Empire Technology Development, Llc Faisceau de nanotubes de graphène pour filtration de gaz
WO2014171599A1 (fr) * 2013-04-17 2014-10-23 한양대학교 산학협력단 Membrane de séparation composite contenant une couche de revêtement d'oxyde de graphène/acide de bile ou un sel de ceux-ci et procédé de fabrication associé
CN204307452U (zh) * 2014-03-05 2015-05-06 江苏创云环保科技有限公司 一种用于空气净化机的新型过滤材料
CN205216513U (zh) * 2015-12-17 2016-05-11 唐山艾米电子科技有限公司 一种石墨烯复合过滤网
CN205340344U (zh) * 2016-02-03 2016-06-29 山东巴锐汽车零部件股份有限公司 一种含石墨烯材料和纳米材料的空气过滤布

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109772146A (zh) * 2019-03-11 2019-05-21 广东顺德佑力电气科技有限公司 空气净化材料及其制备方法和应用
CN109772146B (zh) * 2019-03-11 2021-09-03 广东顺德佑力电气科技有限公司 空气净化材料及其制备方法和应用
CN111203033A (zh) * 2020-03-17 2020-05-29 广州康滤净化科技有限公司 一种石墨烯阻垢抗菌复合纤维滤芯及其制备方法
CN111672203A (zh) * 2020-07-13 2020-09-18 山东中恒景新碳纤维科技发展有限公司 一种过滤材料及其制备方法和应用

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