EP3411466A1 - Procede de nettoyage d'un substrat contamine par des particules - Google Patents
Procede de nettoyage d'un substrat contamine par des particulesInfo
- Publication number
- EP3411466A1 EP3411466A1 EP17713716.3A EP17713716A EP3411466A1 EP 3411466 A1 EP3411466 A1 EP 3411466A1 EP 17713716 A EP17713716 A EP 17713716A EP 3411466 A1 EP3411466 A1 EP 3411466A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cleaning
- particles
- polymer
- polymer matrix
- substrate according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/3769—(Co)polymerised monomers containing nitrogen, e.g. carbonamides, nitriles or amines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0014—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by incorporation in a layer which is removed with the contaminants
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/3757—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
- C11D3/3765—(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions in liquid compositions
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/10—Objects to be cleaned
- C11D2111/12—Soft surfaces, e.g. textile
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/10—Objects to be cleaned
- C11D2111/14—Hard surfaces
Definitions
- the present invention relates to a method of cleaning a surface having been contaminated with particles, for example metal oxide nanoparticles.
- the field of use of the present invention relates in particular to the decontamination of metal, glass, plastic or ceramic surfaces.
- nanoparticles in fields as varied as health, microelectronics, energy, or cosmetics requires studying the possible health or environmental impact that these nanoparticles are likely to generate.
- nanoparticles whose quantity marketed each year is estimated at about 11.5 million tonnes, include carbon black (9.6.10 6 1), synthetic amorphous silica (1.5.10 6 t), aluminum oxide (200,000 t), barium titanate (15,000 t), titanium dioxide (10,000 t), cerium oxide (10,000 t), and zinc oxide (8,000 t).
- wipe cleaning wet and the use of a peelable film are the most interesting.
- the use of acidic or basic solutions, surfactants, powders or abrasive creams is particularly suitable for cleaning hard surfaces such as ceramics, metals, plastics or glass. This is particularly the case when the surfaces are not flat.
- peelable materials are of interest for cleaning large areas. Indeed, the solid residue containing the particles contaminating the surface can be easily handled and removed, in particular by peeling a single large film or brushing followed by suction.
- the peeling of a single large film is particularly suitable for smooth and flat surfaces while brushing followed by suction is applicable to any type of surface.
- US 2002/0160224 discloses a treatment for cleaning and treating surfaces such as ceramic, steel, plastic, glass or external surfaces of a vehicle. This treatment also comprises the deposition of a hydrophilic polymer remaining on the cleaned surface so as to avoid the formation of traces during drying.
- US 2010/0313907 discloses a method for removing contaminants using magnetic nanoparticles.
- the application of a magnetic field thus makes it possible to simultaneously remove the magnetic nanoparticles and the contaminants to which they are linked.
- the document US 1982/4341687 describes the use of a peelable film to protect surfaces and this, prior to possible contamination. The film is removed only in case of contamination. The contaminants thus removed are based on the peelable film, they are in no case prisoners of it.
- the prior art includes many methods for cleaning various types of surfaces by wet wiping and peelable film deposition.
- the Applicant has developed an inexpensive alternative, thanks to a polymer matrix for trapping particles contaminating a substrate.
- the present invention makes it possible to clean a substrate whose surface is polluted by particles by virtue of the action of a polymer matrix which may be a microgel which, after drying, forms a varnish trapping the particles in the polymer matrix. . Particles present or adsorbed on solid surfaces are impregnated into the polymer matrix. The varnish can then be peeled off the surface of the substrate.
- a polymer matrix which may be a microgel which, after drying, forms a varnish trapping the particles in the polymer matrix.
- the present invention relates to a method for cleaning a substrate contaminated with particles, comprising the following steps:
- R 1 H or CH 3
- R 2 NH 2 ; NHR 3 ; NR 3 2 ; or OR 3
- R 3 H or group comprising 1 to 22 carbon atoms (Ci-C 22 ) impregnation of the particles in the polymer matrix;
- Ci-C 22 denotes a hydrocarbon group comprising 1 to 22 carbon atoms, preferably 1 to 8 carbon atoms.
- Ci-C 22 may comprise heteroatoms (O, N, S for example) and / or at least one aromatic group.
- C 1 -C 22 is advantageously a linear or branched alkyl group.
- the group C 1 -C 22 may in particular be a methyl, ethyl, isopropyl, butyl, hexyl, 2-ethylhexyl, lauryl or strearyl alkyl.
- the counter-ion is advantageously a cation of an alkali metal or an ammonium, in particular a quaternary ammonium.
- the substrate that can be cleaned using the process according to the invention can be carried out a material selected from the group consisting of plastics, metals, metal oxides, textiles, glass, and ceramics.
- a substrate whose contaminated part has a smooth surface that is to say a surface whose roughness (average of the depths of the micro geometric defects of the surface) is advantageously less than 1 ⁇ , in particular in the case of a metal substrate.
- the substrate generally corresponds to a surface of a unit for producing or handling nanoparticle-type particles.
- the particles trapped according to the invention have a size advantageously between 1 and 1000 nanometers, more advantageously between 1 and 100 nanometers. Their aggregates and agglomerates may be larger.
- the particles are metal particles, metal oxide particles or carbon-based particles. It may especially be TiO 2 , SiO 2 , Al 2 O 3 , CeO 2 , or Ag particles.
- the carbon-based particles may be carbon nanotubes, graphene, carbon black, or nanocellulose.
- the first step of the process according to the invention consists in depositing a polymer matrix on the substrate to be cleaned, and more particularly on a surface of the substrate being contaminated by the presence of particles.
- the deposition of the polymer matrix may in particular be carried out by manual deposition of drops, by spraying, or by coating, for example with a brush.
- the polymer matrix used is advantageously in the form of a microgel.
- a microgel corresponds to gel particles whose size is between 0.1 and 100 micrometers, the size corresponding to the largest dimension of the gel, that is to say the diameter for spherical particles.
- the polymer matrix has, before the formation of the varnish, a weight ratio polymer / water advantageously between 1 and 75%, more preferably between 5 and 50%.
- the acrylic monomer is acrylamide or methacrylamide.
- the radical polymerization is carried out conventionally in the presence of a radical polymerization initiator consisting of an initiator preferably chosen from the family of azo initiators and peroxides.
- a radical polymerization initiator consisting of an initiator preferably chosen from the family of azo initiators and peroxides.
- preferred initiators include azobisisobutyronitrile (AIBN) and potassium persulfate (KPS).
- AIBN azobisisobutyronitrile
- KPS potassium persulfate
- the polymer for forming the polymer matrix is crosslinked with at least one crosslinking agent.
- the crosslinking of the polymer is generally carried out in the presence of a crosslinking agent during the polymerization of the acrylic monomer or monomers.
- the crosslinking agent is advantageously a compound having at least two vinyl functional groups such as N, N'-methylenebisacrylamide, ⁇ , ⁇ '-ethylenebisacrylamide, dihydroxyethylene bisacrylamide, ⁇ , ⁇ '-bisacryloylpiperazine, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, glycerin triacrylate, divinylbenzene, vinylsulfone or carbodiimidesglycol dimethacrylate, advantageously N, N'-methylene-bis-acrylamide.
- vinyl functional groups such as N, N'-methylenebisacrylamide, ⁇ , ⁇ '-ethylenebisacrylamide, dihydroxyethylene bisacrylamide, ⁇ , ⁇ '-bisacryloylpiperazine, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, glycerin triacrylate, divinylbenzene, vinylsulfone or carbod
- the crosslinking agent represents 0.01 to 20 mol%, relative to the acrylic monomer (s), more advantageously 0.5 to 5 mol%.
- the polymer matrix can also comprise chelating functions that can promote the cleaning of certain (nano) particles.
- the polymer matrix may comprise catechol or thiol functions, especially for the removal of (nano) metal particles such as (nano) particles of silver or gold.
- the polymer matrix may be obtained in the presence of at least one surfactant. It may especially be one or more anionic, cationic, zwitterionic and / or nonionic surfactants. These surfactants can be used alone or in a mixture of two or more.
- the surfactant may be chosen from the following groups: alkylbenzene sodium sulphonates, sodium alkyl sulphonates, polyoxyethylene sodium alkyl ether sulphonates, polyoxyethylene alkyl ether, polyoxyethylene glycol and polyoxypropylene glycol.
- the surfactant is preferably 1,4-bis (2-ethylhexoxy) -1,4-dioxobutane-2-sulfonate sodium (AOT; CAS 577-11-7); sodium dodecyl sulfate (SDS, CAS 151-21-3) or the nonionic surfactant corresponding to CAS No. 9003-11- 6.
- the surfactant used may have unsaturations thus making it polymerizable.
- agent (s) surfactant (s) represent (s) advantageously between 0.1 and 10% by weight of the polymer matrix (water + polymer + crosslinking agent if appropriate), more preferably less than 0.1 to 5 %% by weight of the polymer matrix.
- the nature of the surfactant also makes it possible to modify the polymer matrix.
- the polymer matrices, and more particularly in the form of microgels, containing the surfactants having the following CAS numbers CAS 9003-116, CAS 151 -21 -3 and CAS 577-117 have a decreasing size .
- the impregnation, or even the migration, of the particles within the polymer matrix takes place between the polymer matrix deposition and the varnish formation stages, that is to say during the drying of the polymer matrix, by evaporation. some water.
- the polymer matrix is in the aqueous phase devoid of an organic solvent, drying has the advantage of not producing volatile organic compounds.
- the removed particles can be treated in conventional nanoscale solid waste management channels while limiting the volume of effluent to be treated.
- the drying of the polymer matrix may in particular be carried out at atmospheric pressure and at a relative humidity which may be between 20 and 70%.
- the formation of the varnish is advantageously obtained after 1 to 72 hours at this temperature, more advantageously between 2 and 24 hours.
- the drying step can be accelerated, for example by increasing the temperature and / or lowering the pressure.
- the particles are then trapped in the varnish formed by drying the polymer matrix.
- the varnish is in the form of a polymer film on the surface of the substrate. It is advantageously removed by tearing.
- the formation of the varnish by drying the polymer matrix may be accompanied by cracking.
- the removal of the varnish can be facilitated by manual mechanical action, by using a brush, a vacuum or compressed air. This optional means makes it possible to eliminate any residues of varnish.
- the polymer matrix used in the present invention does not require or little rinsing solvent.
- the removal of the varnish is generally carried out without water.
- the process according to the invention makes it possible to eliminate the majority of the particles by using a single deposit of polymer matrix.
- the various process steps can be repeated, especially in the face of large quantities of particles to be removed.
- a process comprising two consecutive sequences (polymer matrix / varnish / elimination) each making it possible to eliminate 90% of particles, could correspond to a total decontamination efficiency of 99%.
- the present invention may in particular be implemented for cleaning instruments, equipment, vehicles, or surfaces in industry and research. It may also concern the restoration of monuments, works of art or an intervention after a disaster, for example after a fire resulting in the deposition of smoke particles or soot.
- MG1-MG4 polymeric matrices according to the invention (MG1-MG4) of polymethacrylamide were prepared from the polymers P1-P4 obtained according to the following procedure and according to the conditions of Table 1.
- the methacrylamide is polymerized by radical radical polymerization in the presence of a radical initiator and optionally a crosslinking agent and a surfactant.
- a radical initiator for this purpose, an aqueous solution containing methacrylamide (CAS 79-39-0), ⁇ , ⁇ '-methylene-bis-acrylamide and a surfactant is prepared and degassed for several hours with argon.
- an aqueous solution containing the radical initiator is prepared and degassed for several hours with argon.
- microgel thus produced is dried at 70 ° C under vacuum and can be stored dry at room temperature for several years.
- microgel Before each use, the microgel is suspended in heated water (5 to 50% by weight of microgel) until the optimum viscosity for easy application.
- heated water 5 to 50% by weight of microgel
- the nature of the surfactant used makes it possible to vary the size of the microgel with MG3>MG2> MG1.
- Table 1 Polymers used to form the MG1-MG4 microgels.
- AOT sodium 1,4-bis (2-ethylhexoxy) -1,4-dioxobutane-2-sulfonate (CAS 577-1 1-7)
- SDS sodium dodecyl sulfate (CAS 151-21-3)
- Pluronic® F-127 nonionic surfactant with CAS number 9003-1 1-6
- MBA ⁇ , ⁇ '-methylene-bis-acrylamide with CAS number 1 10-26-9
- the molar percentages (mol%) are expressed relative to the amount of methacrylamide monomer.
- the suspension of TiO 2 used has a concentration of 1 g / l in water.
- a deposit of 10 ⁇ is made on the substrate which is then dried on a hot plate at 50 ° C.
- the microgel (MG1 to MG4) is solubilized in hot deionized water (approximately 50 ° C), then a few drops are pipetted onto the substrate to cover an area of approximately 1 cm 2 in the center of which the Ti0 2 deposition was performed.
- the substrate is protected from dust at ambient temperature / pressure / humidity for 48 hours. At the end of these 48 hours, the microgel looks like a shell that comes off almost alone in one piece.
- Table 2 cleaning protocols for the glass substrate.
- the glass slide has not undergone treatment.
- Example CE-2 a drop of deionized water was deposited on the glass slide. This drop of water, of the same volume as the microgels of Examples INV-1 to INV-3, was then dried before being subjected to a mechanical action simulating the detachment of the varnish as in Examples INV-1 to INV-3. 3.
- examples INV-1 to INV-3 according to the invention a drop of a saturated aqueous solution of microgel was deposited on the glass slide. After drying, a slight mechanical action was applied to the blade so as to finish the peeling of the varnish formed by the dried microgel.
- the polystyrene plate has not undergone treatment.
- Example CE-4 a drop of deionized water was deposited on the polystyrene plate. This drop of water, of the same volume as the microgel of Example INV-4, was then dried before being subjected to a mechanical action simulating the detachment of the varnish as in Example INV-4.
- the deposition of a drop of water followed by a mechanical action makes it possible to remove up to 40% of TiO 2 nanoparticles. The nanoparticles are likely displaced on the surface of the substrate and partially collected during the mechanical action (CE-4) consistent with the observations of the first experiment.
- the use of the MG4 microgel makes it possible to eliminate more than 95% of the nanoparticles.
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1652435A FR3049202B1 (fr) | 2016-03-22 | 2016-03-22 | Procede de nettoyage d'un substrat contamine par des particules |
| PCT/FR2017/050437 WO2017162945A1 (fr) | 2016-03-22 | 2017-02-28 | Procede de nettoyage d'un substrat contamine par des particules |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3411466A1 true EP3411466A1 (fr) | 2018-12-12 |
| EP3411466B1 EP3411466B1 (fr) | 2019-09-04 |
Family
ID=55863085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17713716.3A Active EP3411466B1 (fr) | 2016-03-22 | 2017-02-28 | Procede de nettoyage d'un substrat contamine par des particules |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3411466B1 (fr) |
| FR (1) | FR3049202B1 (fr) |
| WO (1) | WO2017162945A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12534686B2 (en) | 2023-08-25 | 2026-01-27 | Reckitt & Colman (Overseas) Hygiene Home Limited | Cooktop cleaning formulations |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4341687A (en) | 1979-09-25 | 1982-07-27 | Tokyo Shibaura Denki Kabushiki Kaisha | Peelable film-forming urethane/isocyanate paints |
| JP3046918B2 (ja) * | 1994-10-17 | 2000-05-29 | クレオール株式会社 | 塗装面の洗浄方法 |
| US7267728B2 (en) | 2001-01-30 | 2007-09-11 | The Procter & Gamble Company | System and method for cleaning and/or treating vehicles and the surfaces of other objects |
| GB0404326D0 (en) * | 2004-02-27 | 2004-03-31 | Reckitt Benckiser Uk Ltd | Method and apparatus |
| GB0517471D0 (en) * | 2005-08-26 | 2005-10-05 | Reckitt Benckiser Uk Ltd | Surface treatment process and applicator |
| FR2891470B1 (fr) | 2005-10-05 | 2007-11-23 | Commissariat Energie Atomique | Gel aspirable pour la decontamination de surfaces et utilisation |
| US8845812B2 (en) | 2009-06-12 | 2014-09-30 | Micron Technology, Inc. | Method for contamination removal using magnetic particles |
| DE102014104238A1 (de) * | 2014-03-26 | 2015-10-01 | Washtec Holding Gmbh | Fahrzeugwaschanlage und Verfahren zur Reinigung von Fahrzeugen und Reinigungsmittel |
-
2016
- 2016-03-22 FR FR1652435A patent/FR3049202B1/fr active Active
-
2017
- 2017-02-28 WO PCT/FR2017/050437 patent/WO2017162945A1/fr not_active Ceased
- 2017-02-28 EP EP17713716.3A patent/EP3411466B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| FR3049202A1 (fr) | 2017-09-29 |
| WO2017162945A1 (fr) | 2017-09-28 |
| FR3049202B1 (fr) | 2022-03-04 |
| EP3411466B1 (fr) | 2019-09-04 |
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