WO2022258686A1 - Composition et dispositif pour la désinfection de l'air - Google Patents
Composition et dispositif pour la désinfection de l'air Download PDFInfo
- Publication number
- WO2022258686A1 WO2022258686A1 PCT/EP2022/065548 EP2022065548W WO2022258686A1 WO 2022258686 A1 WO2022258686 A1 WO 2022258686A1 EP 2022065548 W EP2022065548 W EP 2022065548W WO 2022258686 A1 WO2022258686 A1 WO 2022258686A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- composition
- biocide
- biochar
- disinfection
- Prior art date
Links
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims description 13
- 230000003115 biocidal effect Effects 0.000 claims abstract description 85
- 239000003139 biocide Substances 0.000 claims abstract description 85
- 239000000203 mixture Substances 0.000 claims abstract description 53
- 244000000010 microbial pathogen Species 0.000 claims abstract description 25
- 230000009471 action Effects 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 13
- 241001678559 COVID-19 virus Species 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 230000000249 desinfective effect Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- WSFMFXQNYPNYGG-UHFFFAOYSA-M dimethyl-octadecyl-(3-trimethoxysilylpropyl)azanium;chloride Chemical compound [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CCC[Si](OC)(OC)OC WSFMFXQNYPNYGG-UHFFFAOYSA-M 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 238000011282 treatment Methods 0.000 abstract description 19
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- 239000011148 porous material Substances 0.000 description 12
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- 239000010410 layer Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000000645 desinfectant Substances 0.000 description 7
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- 235000011437 Amygdalus communis Nutrition 0.000 description 2
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- 241000196324 Embryophyta Species 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 241000220304 Prunus dulcis Species 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000012190 activator Substances 0.000 description 2
- 235000020224 almond Nutrition 0.000 description 2
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- 238000010297 mechanical methods and process Methods 0.000 description 2
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- 239000002086 nanomaterial Substances 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
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- 235000021317 phosphate Nutrition 0.000 description 2
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 125000001453 quaternary ammonium group Chemical group 0.000 description 2
- PUAQLLVFLMYYJJ-UHFFFAOYSA-N 2-aminopropiophenone Chemical compound CC(N)C(=O)C1=CC=CC=C1 PUAQLLVFLMYYJJ-UHFFFAOYSA-N 0.000 description 1
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
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- 229910021641 deionized water Inorganic materials 0.000 description 1
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- 210000003608 fece Anatomy 0.000 description 1
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- 239000003517 fume Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 230000005182 global health Effects 0.000 description 1
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- 230000002209 hydrophobic effect Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
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- 238000005399 mechanical ventilation Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
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- 230000035755 proliferation Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- -1 quaternary ammonium organosilanes Chemical class 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000002364 soil amendment Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
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- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- QLNOVKKVHFRGMA-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical group [CH2]CC[Si](OC)(OC)OC QLNOVKKVHFRGMA-UHFFFAOYSA-N 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/12—Powders or granules
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
- A01P1/00—Disinfectants; Antimicrobial compounds or mixtures thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/01—Deodorant compositions
- A61L9/014—Deodorant compositions containing sorbent material, e.g. activated carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/26—Synthetic macromolecular compounds
- B01J20/262—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon to carbon unsaturated bonds, e.g. obtained by polycondensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
- B01J20/28007—Sorbent size or size distribution, e.g. particle size with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2101/00—Chemical composition of materials used in disinfecting, sterilising or deodorising
- A61L2101/02—Inorganic materials
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2101/00—Chemical composition of materials used in disinfecting, sterilising or deodorising
- A61L2101/32—Organic compounds
- A61L2101/46—Macromolecular compounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/10—Apparatus features
- A61L2209/14—Filtering means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/20—Method-related aspects
- A61L2209/22—Treatment by sorption, e.g. absorption, adsorption, chemisorption, scrubbing, wet cleaning
Definitions
- the present invention relates to the field of air disinfection. It will more particularly find its application for the treatment of the air with a view to the suppression of pathogenic micro-organisms such as viruses, bacteria, fungi.
- the invention can be applied in any air treatment device for treating enclosed spaces such as an entire structure or specific spaces in a building or in any transport vehicle, including in air suction systems.
- Air treatment is an old problem that aims to purify the air, especially inside a building.
- air treatment is carried out by various technological processes known to purify the air of chemical fumes, volatile particles or odors.
- COVID-19 coronavirus disease 2019
- SARS-CoV-2 Severe Acute Respiratory Syndrome Coronavirus 2
- the propagation of the virus being done in particular by the air, the treatment of the air for eliminating pathogens circulating in the air and in particular the SARS-CoV-2 virus has become a global health problem.
- the aim of the present invention is to provide a solution which makes it possible to disinfect the air from pathogenic microorganisms.
- the invention provides a composition for air disinfection comprising a biochar combined with a biocide.
- the association biochar and biocide allows both to have a disinfectant treatment while optimizing the treatment surface of the biocide thanks to the biochar.
- the invention allows air volume treatment of pathogenic microorganisms contained in the air.
- the biocide is configured to act by a mechanical action, that is to say it destroys, prevents the pathogenic microorganism from acting by the mechanical action and preferably without a chemical action .
- the biochar is coated, or impregnated or soaked with biocide.
- the biochar makes it possible to considerably increase the surface on which the biocide is applied and therefore makes it possible to increase the surface of treatment available for a given surface in a considerable way.
- the biocide applied according to the invention destroys pathogenic microorganisms by means of a mechanical process: a coating comprising nanometric points also designated peaks.
- the peaks have a quasi-pointed, preferably pointed, distal end.
- Another aspect relates to an air disinfection device comprising the composition and a support on which the composition is deposited.
- the device makes it possible to reduce or even eliminate the number of pathogenic microorganisms contained in the air, preferably circulating air.
- Another aspect relates to the use of the composition for disinfecting the air according to the invention or of a disinfection device according to the invention to reduce the quantity of pathogenic microorganisms in an air flow.
- Another aspect relates to a process for manufacturing the device according to the invention comprising a step of impregnating or coating the biochar with the biocide in the liquid state.
- Another aspect relates to a method for disinfecting an air flow using a composition or a disinfection device according to the invention comprising the formation of an air flow by circulating the air and bringing the air flow into contact with the biocide.
- FIG. 1 represents the air disinfection composition according to a first embodiment: the biochar being combined with the biocide.
- FIG. 2 represents a device according to one embodiment of the invention comprising the composition according to FIG. 1 in an air circulation pipe.
- FIG. 3 represents a device according to one embodiment of the invention comprising the composition according to FIG. 1 in an air filter.
- FIG. 4 represents a device according to one embodiment of the invention comprising the composition according to FIG. 1 attached to a support.
- FIG. 5 represents a detail view of the surface of the biocide applied to the biochar.
- the biocide has a mechanical action.
- the biochar is impregnated, soaked or coated with the biocide.
- the biocide forms a solid nanometric layer, advantageously applied to the biochar.
- the solid nanometric layer has a thickness comprised between 50 and 300 nm, preferably between 150 and 300 nm.
- the solid nanometric layer comprises on its surface peaks configured to destroy pathogenic microorganisms when the peaks come into contact with the pathogenic microorganisms.
- the biocide comprises a silsesquioxane quat.
- the biocide comprises silicon dioxide.
- the biocide is the product Liquid Guard®.
- the biocide is the product Zoono®.
- the biochar is hydrophilic, wherein the biochar can have positive, negative or neutral electrical conductivity.
- the support is an air filter provided with at least one surface able to be traversed by a flow of air, the composition being fixed and/or placed on at least one face of said surface.
- the support comprises an air filter defining an interior volume capable of being traversed by the flow of air, the composition being placed in said interior volume.
- the air disinfection device is a mask intended for air filtration.
- the use of the device or of the composition is intended for the disinfection of the SARS-CoV-2 virus (Severe Acute Respiratory Syndrome Coronavirus 2).
- the manufacturing method comprises a step of fixing the biochar on a support before or after the impregnation step.
- Biochar is charcoal of plant origin.
- Biochar is a charcoal obtained by pyrolysis of biomass of organic plant matter, for example fruit shells.
- 'biochar' is the abbreviation of 'bio-charcoal' from the prefix "bio” which means biological origin and the English word “charcoal” which means charcoal.
- Pyrolysis is the thermal decomposition of organic matter in an oxygen-poor environment, it leads to the production of three constituents: a gaseous mixture consisting of non-condensable gas, bio-oil and a solid residue with a high carbon content called biochar.
- the pyrolysis preferably takes place above 180°C, for example above 200°C, preferably between 180° and 1000°C.
- Biochar is a charcoal that can be produced in an artisanal or industrial way.
- Biochar is known for its application as a soil amendment.
- biochar refers to any organic material that is carbonized for the benefit of applying it to soil or sequestering carbon.
- the biochar is advantageously a solid rich in stable carbon and recalcitrant to mineralization by soil microorganisms, due to its composition rich in aromatic structures. It thus plays the role of carbon fixation in the soil and therefore of carbon sink, which explains its interest in the context of concerns about global warming.
- Biochar can be produced from organic matter of various origins (agricultural residues, manure, forestry exploitation residues, etc.).
- the biochar comprises particles of sizes between one millimeter and several centimeters in diameter. For example from 1 mm to 15 cm. Particle size is understood as the largest dimension of a particle.
- the biochar is porous.
- Biochar particles include pores.
- the pores are advantageously open.
- the open pores are connected to the outside, either directly or via other pores and/or a network of channels or fissures. Fluids can diffuse into the open pores, which thus participate in the actual surface.
- the real surface thus advantageously corresponds to the surface in contact with the outside.
- the biochar has a porosity, more specifically pores, the dimensions of which allow the penetration of a virus.
- the pores have a dimension greater than or equal to 18 nm, optionally 25 nm, optionally more than 100 nm.
- biochar from almond shells exhibits a pore size range of 40-60 ⁇ m which is advantageous for the present invention.
- a contaminated air flow can enter the pores of the biochar treated with the biocide according to the invention or most of the existing pathogens in this air flow will be captured and killed.
- the biochar has an apparent surface defined by the periphery of the particle which defines an interior volume.
- the porosity defines an internal surface, that is to say the surface of biochar exposed to the air in the internal volume.
- the real surface of the biochar exposed to the air is therefore the sum of the apparent surface and the internal surface, advantageously accessible by nanometric pathogens contained in the air flow.
- the porosity of the biochar is configured to define a real surface of the order of 250 mm 2 per mm 3 of biochar.
- the biochar has a real surface which is significantly larger than the apparent surface, due to its internal lattice structure, channels and/or pores.
- the dimensions of the biochar particles and the porosity are configured to respect a ratio between the real surface, on the apparent surface which is greater than or equal to 1.5, this ratio is advantageously at least 3 or even preferably 10.
- the ratio may be greater for large air filtration system applications.
- the biochar comprises a specific surface greater than or equal to 100m 2 /g and according to one possibility less than or equal or even less than strictly 500m 2 /g.
- the specific surface also called Massic Area corresponds to the ratio of the real surface to the quantity of matter.
- the specific area is determined for example by gas adsorption according to the method of Brunauer, Emmett and Teller or BET.
- the biochar advantageously has a carbon content greater than 70%. Usually, coal has a lower carbon content.
- the biochar is obtained by pyrolysis with or without a subsequent activation step. The activation step may be intended to remove tars,
- the biochar is chosen to be hydrophilic. This arrangement allows optimized adhesion of the biocide to the biochar; Advantageously, this limits the need to use a fixing primer to improve the adhesion of the biocide.
- Biochar can be exfoliated or not.
- the exfoliated biochar optimizes adhesion on surfaces exposed to the air and more precisely exposed to an air flow, facilitating the adhesion of the biocide.
- the electrical polarity of biochar can be selected based on target pathogens to optimize pathogen capture. Once the polarity of a primary pathogen is determined, the polarity of the biochar can be adjusted accordingly to be attractive rather than repellant. For example, according to an exemplary embodiment, almond shell biochar exhibits low electronegative polarity.
- the biochar is chosen with low electronegativity to ensure better association with the biocide.
- the biochar is hydrophobic and for example with a slightly negative polarity which retains the adhesion capacity for the biocide.
- the composition comprises a fixing primer, advantageously forming a layer to improve the fixing of the biocide on the biochar can be provided.
- the fixing primer is, for example, an adhesion activator or promoter.
- the fixing primer is applied in a liquid state on the biochar, once the fixing primer is dry, the biocide is applied.
- the fixing primer comprises for example phosphates to facilitate the attachment of the biocide to the biochar.
- the composition according to the invention also comprises a biocide.
- Biocide means a product intended to destroy, repel or render harmless harmful organisms, to prevent their action or to combat them.
- a biocide acts by chemical or biological or even preferentially mechanical action.
- the biocide is chosen to act by mechanical action, preferably only.
- the biocide is a disinfecting agent with mechanical action.
- the biocide acts by the action of the kinetic energy of the pathogenic microorganism carried away by a flow of air which is applied to the biocide.
- the disinfectant is nanometric.
- the disinfectant acts at the nanometric level by destroying and/or inhibiting pathogenic microorganisms
- the biocide is also understood as an inhibitor, advantageously nanometric, preferentially mechanical, of pathogenic microorganisms.
- the biocide is associated with the biochar in that the biochar forms a base or support for applying the biocide.
- the biocide is in direct or indirect contact, in particular via a fixing primer described later, with the biochar.
- the biocide forms at least one coating layer of the biochar.
- the biocide forms a solid layer of nanometric dimension on the surface of the biochar, for example ranging from 150 to 300 nm.
- the biocide advantageously forms a layer, for example monomolecular, which binds permanently to the biochar.
- the biocide is configured to infiltrate exposed areas of the biochar including all accessible pores, ducts and internal spaces.
- the biochar is coated or soaked or impregnated with biocide.
- the biocide coats at least the apparent surface of the biochar, but also at least partly the internal surface, that is to say the pores, in particular when the biocide has soaked or impregnated the biochar.
- the biocide at least partially covers the actual surface of the biochar.
- the biochar makes it possible to increase the surface of application of the biocide and therefore optimize the treatment.
- the actual surface on which the biocide can be applied is significantly greater than the apparent surface of the biochar.
- biocide 2 coats the visible surface of biochar 1 and partially the internal surface.
- the biocide applied according to the invention destroys pathogenic microorganisms by means of a mechanical process: a coating comprising nanometric points also designated peaks.
- the biocide advantageously forms a layer comprising molecules which covalently bind to the biochar forming a layer comprising positively charged peaks. Positively charged spikes attract and pierce negatively charged microorganisms. Spikes rupture cell walls. This causes the decomposition of microorganisms with a lethal effect.
- the molecules are chosen from silane-based polymers.
- the biocide comprises a nanometric structure forming peaks.
- the spikes perforate the pathogenic microorganisms when they come into contact with the spikes.
- the peaks each extending along a main direction.
- Dmax is preferably of the order of 0.5 nm. If the section of the peak is circular, Dmax corresponds to the diameter of the peak.
- the peaks are of nanometric diameters, for example of the order of 0.5 nm. The peaks are said to be microscopic or even nanometric.
- the nanostructure thus constituted is composed of small points or peaks which go by a mechanical phenomenon by the energy force of the movement of air helped, or not, by an electromagnetic effect, in particular by charged nitrogen atoms positively, to stand on arrival of a microorganism, for example naturally negatively charged to advantageously add an electromotive force to pierce the pathogen resulting in its instantaneous and immediate bursting on contact with it. Disinfection is therefore mechanical and not chemical. It is also instantaneous. Nanotechnologies can be used for the constitution of the nanostructure, but in no case for the constitution of nanoparticles of which the product is completely free.
- the biocide comprises for example a density of peaks of greater than 1000 peaks/pm 2 , preferably greater than 10,0000 peaks/pm 2 , preferably greater than 500,000 peaks/pm 2 .
- the biocide comprises quat-silsesquioxanes or quaternary ammonium organosilanes.
- Quat Silsesquioxane is part of the group of quaternary ammoniums and is classified as a biocide in liquid state. Its chemical name is Octadecanaminium- N,N-dimethyl-N- ⁇ 3-(trimethoxysilyl)propyl ⁇ -chloride. Empirical formula C26H58CIN03SI.
- the biocide comprises amorphous silicon dioxide.
- the biocide is a mixture of quaternary ammonium chloride with a silane function on the alkyl group.
- the biocide is the product Liquid Guard® from the company Nano-Care marketed in France by the company Nano-Protection.
- Liquid Guard® optionally includes quat-silsesquioxane, polymers, amorphous silicon dioxide and deionized water.
- the biocide is the product Zoono® Z-71 from Zoono.
- This product comprises quaternary ammoniums and more specifically organosilane quaternary ammoniums allowing disinfection by mechanical action.
- the biocide is advantageously chosen to form peaks as described above which can be considered as non-flexible, semi-rigid or rigid.
- the biocide is advantageously chosen to form peaks as described above configured to ensure mechanical disinfection of the air flow, in particular by bursting the cell membrane of pathogenic microorganisms.
- the invention relates to an air treatment device comprising the composition according to the invention and a support, on which the composition is placed.
- the device according to the invention comprises a fixing primer to facilitate the attachment of the biocide to the support.
- the fixing primer possibly comprises an adhesion activator or promoter comprising for example phosphates.
- the fixing primer is advantageously placed on the support before the biocide.
- the fixing primer is applied in the liquid state then the biocide is applied once the fixing primer is dry.
- composition and/or the air disinfection device is intended for the disinfection of viruses and in particular of the severe acute respiratory syndrome Coronavirus 2 virus: SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2).
- the composition according to the invention is intended to be used with a protective mask of the type, for example a surgical air treatment mask.
- the disinfection device is an air filtration mask.
- the mask can be of different types and advantageously comprises a support for the composition according to the invention, for example a filter paper or a textile or a filtration valve.
- the invention relates to a method for disinfecting an air flow using the composition or the air disinfection device as described in the present application.
- the disinfection process comprises a step of disinfecting an air flow by mechanical action.
- the disinfection process includes the movement of an air flow, for example by a fan, by an air conditioning system, by controlled mechanical ventilation or by natural circulation, for example by opening a window.
- the disinfection method further comprises the disinfection of an air flow by contact of the pathogenic microorganism(s) included in the air flow with the biocide.
- the invention relates to a process for preparing the composition comprising a step of impregnating or coating the biochar with the biocide, advantageously in the liquid state.
- the biochar is brought into contact with the biocide in the liquid state.
- the biochar is immersed in the liquid biocide.
- the impregnated biochar is left to dry, the biocide solidifies on the visible surface and at least partially, preferentially on all, the internal surface of the biochar.
- the method uses at least 5ml of biocide per m 2 of biochar to be coated, preferably 10ml, more preferably 15ml, more preferably at least 25ml per m 2 .
- the method for manufacturing the disinfection device comprises fixing the composition on a support.
- this fixing step is carried out after obtaining the composition and therefore the step of impregnating and/or coating the biochar with the biocide.
- the biochar is fixed on the support before the impregnation step and the support and biochar assembly is covered and/or impregnated with the biocide.
- the air disinfection device comprises the composition and a support 6.
- the support 6 may be varied and the composition may or may not be attached to said support.
- the support 6 defines an interior volume in which the composition is simply placed, preferably without being fixed there.
- the interior volume advantageously comprises an air inlet 10 and an air outlet 11.
- the support 6 is an air pipe 7 into which the composition is simply introduced.
- the pipe 7 may have a particular shape to hold the composition in place and prevent it from being carried away with the air flow, such as for example a siphon.
- the air flow to be treated 3 enters the interior volume through an air inlet 10 and the treated air flow exits the interior volume through an air outlet 11.
- the support 6 comprises two filter screens 8, 9 between which the composition is preferentially embedded without being attached thereto.
- the support 6 is a surface on which the composition is fixed, in particular by a fixing primer 5.
- the support 6 can advantageously be a filtering screen.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Dentistry (AREA)
- Agronomy & Crop Science (AREA)
- Materials Engineering (AREA)
- Toxicology (AREA)
- General Chemical & Material Sciences (AREA)
- Nanotechnology (AREA)
- Crystallography & Structural Chemistry (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
- Respiratory Apparatuses And Protective Means (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2022289440A AU2022289440A1 (en) | 2021-06-10 | 2022-06-08 | Air disinfection method and device |
CA3220072A CA3220072A1 (fr) | 2021-06-10 | 2022-06-08 | Composition et dispositif pour la desinfection de l'air |
EP22733354.9A EP4351336A1 (fr) | 2021-06-10 | 2022-06-08 | Composition et dispositif pour la désinfection de l'air |
IL309136A IL309136A (en) | 2021-06-10 | 2022-06-08 | The composition and device for air disinfection |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MC2711 | 2021-06-10 | ||
MC2711A MC200246B1 (fr) | 2021-06-10 | 2021-06-10 | Composition et dispositif pour la desinfection de l'air |
Publications (1)
Publication Number | Publication Date |
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WO2022258686A1 true WO2022258686A1 (fr) | 2022-12-15 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2022/065548 WO2022258686A1 (fr) | 2021-06-10 | 2022-06-08 | Composition et dispositif pour la désinfection de l'air |
Country Status (7)
Country | Link |
---|---|
US (1) | US20220394978A1 (fr) |
EP (1) | EP4351336A1 (fr) |
AU (1) | AU2022289440A1 (fr) |
CA (1) | CA3220072A1 (fr) |
IL (1) | IL309136A (fr) |
MC (1) | MC200246B1 (fr) |
WO (1) | WO2022258686A1 (fr) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106881073A (zh) * | 2016-05-20 | 2017-06-23 | 上海依瓦达环境技术有限公司 | 一种用于空气净化的光催化剂涂层结构及其制备方法 |
CN108212079A (zh) * | 2018-03-28 | 2018-06-29 | 桂林良物造日用品有限公司 | 一种利用沸石制备的空气净味剂 |
WO2020020890A1 (fr) * | 2018-07-24 | 2020-01-30 | Certis Europe Bv | Forme pharmaceutique à base de pesticide |
-
2021
- 2021-06-10 MC MC2711A patent/MC200246B1/fr unknown
-
2022
- 2022-06-08 CA CA3220072A patent/CA3220072A1/fr active Pending
- 2022-06-08 WO PCT/EP2022/065548 patent/WO2022258686A1/fr active Application Filing
- 2022-06-08 EP EP22733354.9A patent/EP4351336A1/fr active Pending
- 2022-06-08 IL IL309136A patent/IL309136A/en unknown
- 2022-06-08 AU AU2022289440A patent/AU2022289440A1/en active Pending
- 2022-06-09 US US17/836,053 patent/US20220394978A1/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106881073A (zh) * | 2016-05-20 | 2017-06-23 | 上海依瓦达环境技术有限公司 | 一种用于空气净化的光催化剂涂层结构及其制备方法 |
CN108212079A (zh) * | 2018-03-28 | 2018-06-29 | 桂林良物造日用品有限公司 | 一种利用沸石制备的空气净味剂 |
WO2020020890A1 (fr) * | 2018-07-24 | 2020-01-30 | Certis Europe Bv | Forme pharmaceutique à base de pesticide |
Also Published As
Publication number | Publication date |
---|---|
MC200246B1 (fr) | 2022-07-18 |
CA3220072A1 (fr) | 2022-12-15 |
AU2022289440A1 (en) | 2023-12-07 |
US20220394978A1 (en) | 2022-12-15 |
IL309136A (en) | 2024-02-01 |
EP4351336A1 (fr) | 2024-04-17 |
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