WO2016144157A2 - Method for creating a sterile space - Google Patents

Method for creating a sterile space Download PDF

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Publication number
WO2016144157A2
WO2016144157A2 PCT/NL2016/050116 NL2016050116W WO2016144157A2 WO 2016144157 A2 WO2016144157 A2 WO 2016144157A2 NL 2016050116 W NL2016050116 W NL 2016050116W WO 2016144157 A2 WO2016144157 A2 WO 2016144157A2
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WO
WIPO (PCT)
Prior art keywords
nano
space
daylight
radiation
lighting devices
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Application number
PCT/NL2016/050116
Other languages
French (fr)
Other versions
WO2016144157A3 (en
Inventor
Raymond Marcel TROMP
Aad VAN DER STARRE
drs. ing. Klaas HEIJS
Original Assignee
Bio Medical Services & Solutions B.V.
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Publication date
Application filed by Bio Medical Services & Solutions B.V. filed Critical Bio Medical Services & Solutions B.V.
Priority to EP16729393.5A priority Critical patent/EP3268055A2/en
Publication of WO2016144157A2 publication Critical patent/WO2016144157A2/en
Publication of WO2016144157A3 publication Critical patent/WO2016144157A3/en

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Classifications

    • 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
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • A61L2/084—Visible light
    • 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
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • A61L2/088—Radiation using a photocatalyst or photosensitiser
    • 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
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultraviolet radiation
    • A61L9/205—Ultraviolet radiation using a photocatalyst or photosensitiser
    • 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
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/48—Silver or gold
    • B01J23/50—Silver
    • 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
    • B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
    • 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39—Photocatalytic properties
    • 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0215—Coating
    • 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
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/20—Targets to be treated
    • A61L2202/25—Rooms in buildings, passenger compartments

Definitions

  • the invention relates to a method for creating a sterile environment in a space.
  • nano-oxide coating it is common knowledge to create a sterile environment in an internal space by provided the walls (if applicable, including the floor and the ceiling) of the internal space or room with an anti-bacterial, nano-oxide particles-containing coating, for example, a Ti0 2 nano coating, hereinafter referred to as nano-oxide coating,
  • This type of coating provides for a surface that is self-cleaning and self-disinfecting, by creating a high electrostatic potential on the wall, which promotes the formation of radicals. As a result the space is self-sterilizing.
  • the coating is activated under the influence of daylight. Due to the light energy (photons) hitting the nano-oxide coating, water molecules from the air are dissociated and split into radicals.
  • These free oxygen radicals include, but are not limited to, hydroxyl radicals (0 ⁇ ), and oxygen radicals (0 2 " »).
  • By (radical) oxidation the formed free oxygen radicals break down organic compounds, which are present in the space, inter alia as unwanted impurities. Radicals that do not react with the undesirable impurities will react with each other into water again.
  • a prerequisite for the effective operation (functioning) of the coating is receiving sufficient light of the proper wavelength within the space.
  • Each coating requires simultaneous multiple specific wavelengths in order to form the radicals.
  • these requirements often form a problem in internal spaces; in particular in spaces in hospitals and in spaces where food is produced, processed and/or consumed etc.
  • These spaces are often provided with daylight filtering windows and/or sunblinds etc. to limit heat and light reception.
  • This object of the invention is achieved by providing a method for creating a sterile environment in an space having no or limited reception of natural light, comprising the steps of:
  • one or more lighting devices which are configured to emit artificially produced full-spectrum daylight into the space, so that the required wavelengths are provided to a sufficient extent.
  • the method further comprises the step of: applying an ionising (electrically charging) system (also referred to as an electrostatic precipitator or ionizer, hereinafter referred to as ioniser https://nl.wikipedia.org/wiki/Ionisator en https://en.wikipedia.org/wiki/Air_ioniser) optionally combined with the lighting devices and/or lights including LEDs, whereby, among other things, but not exclusively, dust, dirt particles and micro-organisms are charged and thereby attracted to the surfaces of the walls and the objects in the space, in order to come into contact with the nano-oxide coating.
  • an ionising (electrically charging) system also referred to as an electrostatic precipitator or ionizer, hereinafter referred to as ioniser https://nl.wikipedia.org/wiki/Ionisator en https://en.wikipedia.org/wiki/Air_ioniser
  • this deficiency is overcome by providing one or more lighting devices, which are arranged for delivering and emitting artificially produced full-spectrum daylight into the (internal) space by means of lighting devices that are equipped with full-spectrum daylight lamps, preferably full- spectrum daylight LEDs, often referred to as "Full Spectrum Daylight” (FSD) LEDs, since these LEDs are highly energy efficient.
  • lighting devices which are arranged for delivering and emitting artificially produced full-spectrum daylight into the (internal) space by means of lighting devices that are equipped with full-spectrum daylight lamps, preferably full- spectrum daylight LEDs, often referred to as "Full Spectrum Daylight” (FSD) LEDs, since these LEDs are highly energy efficient.
  • full-spectrum daylight lamps preferably full- spectrum daylight LEDs, often referred to as "Full Spectrum Daylight” (FSD) LEDs, since these LEDs are highly energy efficient.
  • FSD Full Spectrum Daylight
  • ionisers can be applied in the space in order to enhance the deposition of particles, including bacteria and other pathogens, onto the surfaces of the coating.
  • the self-cleaning and self-disinfecting power and ability within the space is substantially increased according to the invention, when the antibacterial nano-oxide coating is applied both on the surfaces of the walls of the internal space, which walls form the space and delimit it, as well as on articles located within the space including furniture. Consequently the transfer and transport of pathogen and/or bacterial material is greatly reduced by means of the surfaces of objects, because these particles and (micro) organisms are now also oxidised by the radicals formed on the coated surfaces of the objects.
  • Full-spectrum daylight is necessary for the following reasons : it improves the contrast display and the light image display, so that the space can still be used for the intended purpose for which it is configured, while simultaneously the wavelengths are provided with sufficient energy to activate the coating. When only wavelengths are chosen needed for providing radical formation, then the space can no longer be used for its normal purpose and use-function, or additional lighting points must be installed to fix this problem.
  • the full-spectrum daylight LEDs are part of the group of pseudo or LED fluorescent tubes, which are arranged and designed as replacements for conventional fluorescent lamps, which as a result may simply (or after some modification) be installed in conventional fluorescent fittings (fixtures) .
  • the light produced by the lighting devices comprising the full-spectrum daylight has preferably a colour temperature of at least 5500 K, more preferably at least 6000 K, and most preferably about 6450 K at a colour rendering index (CRI) of at least 80, preferably at least 90 and most preferably about 98.
  • CRI colour rendering index
  • the lighting devices are arranged for additionally emitting (a substantial quantity) of ultraviolet (UV) radiation (ca . 10 to 420 nanometre or SI symbol : nm) into the internal space, complementary to the full-spectrum daylight.
  • UV radiation includes UV-A radiation (320-420 nm) and/or UV-B radiation (280-320 nm), for certain special applications also UV-C radiation ( 10-280 nm) is included .
  • UV radiation in the wavelength range 270-300 nm moreover results in the formation of vitamin D, which can have a positive effect on the "live stock" when it is located within the space (stable) concerned .
  • See for UV radiation https ://nl.wikipedia .org/wiki/ultraviolet and https://en.wikipedia .org/wiki/Ultraviolet.
  • a better "match” can be achieved with the sensitivity of the nano-oxide coating activated (for radical formation) by the lighting devices. Consequently, the efficiency of the radical generation is increased, and more radicals will be formed, at a constant FSD radiation level.
  • This effect can be further optimized by adding Ti(0H) 4 into the nano-oxide coating, so that radical formation occurs at a broader light spectrum.
  • the application of ionisers in the space has the effect that, among others, but not exclusively, dust, dirt particles and micro-organisms are provided with an electric charge, so that these particles are attracted to the coated surfaces within the space and to the coated surfaces configuring the space, including floors, walls and objects, so that these particles come into contact with the deposited nano-oxide coating, where they are oxidized by the (oxygen) radicals.
  • These ionisers can be applied within the space as separate systems, but may also be provided as combined systems together with the lighting devices and/or lights including LEDs.
  • the invention also comprises any space that is configured according to said method.
  • the invention also comprises any lighting device, which is arranged for emitting UV-A and / or UV-B and / or UV-C radiation in such a space, supplementary to full-spectrum daylight.
  • this coating is applied by means of misting and/or foaming a solution in order to be able to guarantee a layer thickness of ⁇ 50 micron, wherein the optimal layer thickness is considered to be about 30 micron.
  • the preferred average grain size of the nano-oxide particles of the nano-oxide coating is 50 - 75 nm, preferably 60 - 70 nm; preferably a size of approximately 62 nm is chosen as optimal average grain size.
  • the nano-oxide coating comprises an addition of silver (including Ag + ions) to the solution, thereby substantially enhancing the activity (for radical generation) of the coating.
  • a percentage of Ti(0H) 4 is added to the nano-oxide coating in order to broaden the active spectrum of the light (up to about 350 - 650 nm) as an active working oxidation range.
  • a phosphate mineral is added for the purpose of improving the bonding between the nano-oxide particles and the internal surfaces configuring the space and/or the surfaces within said space.
  • a phosphate mineral from the apatite group is used, for example, hydroxyapatite, fluorapatite and/or chlorapatite (see https://nl.wikipedia.org/wiki/Apatiet and https://en.wikipedia.org/wiki/Apatite).
  • the nano-particles are advanced and promoted to the surface, so that they can better "react" there with the air.
  • the nano-particles thereby act as a catalyst in the formation of radicals and provide a substantial contribution to the sterilization of the air.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Epidemiology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Catalysts (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

Applying a Ti02 nano coating comprising sterilizing properties when illuminated by daylight. Since hospitals etc. are often equipped with daylight filtering windows and/or shading etc., the invention provides for lighting devices with "full-spectrum daylight" (FSD) LED lighting within sterile rooms of hospitals etc., to remedy the lack of natural FSD. The nano-oxide coating has a layer thickness of <50 micron whereas the grain size of the nano-oxide particles is 50 - 75 nm. By adding silver (Ag+) ions, Ti(OH)4 and/or a phosphate mineral from the group Apatite to the nano-oxide coating, the efficiency of the Ti02 nano-coating irradiated by FSD is substantially improved for the sterilization of air. Additional to the full-spectrum daylight, the lighting devices are configured to emit ultra-violet radiation into the space, in particular UV-A and/or UV-B radiation, thereby obtaining a better "match".

Description

Title: Method for creating a sterile space DESCRIPTION The invention relates to a method for creating a sterile environment in a space.
It is common knowledge to create a sterile environment in an internal space by provided the walls (if applicable, including the floor and the ceiling) of the internal space or room with an anti-bacterial, nano-oxide particles-containing coating, for example, a Ti02 nano coating, hereinafter referred to as nano-oxide coating,
(see for example:
www.nanoservices.nl/include/Antibacteriele_nano_RIVM_-_KIRnano. pdf).
This type of coating provides for a surface that is self-cleaning and self-disinfecting, by creating a high electrostatic potential on the wall, which promotes the formation of radicals. As a result the space is self-sterilizing. The coating is activated under the influence of daylight. Due to the light energy (photons) hitting the nano-oxide coating, water molecules from the air are dissociated and split into radicals. These free oxygen radicals include, but are not limited to, hydroxyl radicals (0Η·), and oxygen radicals (02 "»). By (radical) oxidation the formed free oxygen radicals break down organic compounds, which are present in the space, inter alia as unwanted impurities. Radicals that do not react with the undesirable impurities will react with each other into water again. A prerequisite for the effective operation (functioning) of the coating is receiving sufficient light of the proper wavelength within the space. Each coating requires simultaneous multiple specific wavelengths in order to form the radicals. However, these requirements often form a problem in internal spaces; in particular in spaces in hospitals and in spaces where food is produced, processed and/or consumed etc. These spaces are often provided with daylight filtering windows and/or sunblinds etc. to limit heat and light reception. As a result, there is insufficient supply in J/m2 of light in the wavelengths required in order to activate the process.
When only the walls of a room, and optionally the floor and the ceiling, are provided with a coating, the objects including the furniture in that internal space will not be disinfected, and, for example, pathogens including bacteria are easily transferred via (human) contact with the surfaces of these objects. It is an object of the present invention to provide a solution for these problems.
This object of the invention is achieved by providing a method for creating a sterile environment in an space having no or limited reception of natural light, comprising the steps of:
applying a nano-oxide coating on internal surfaces of the space and/or surfaces within said space;
applying one or more lighting devices, which are configured to emit artificially produced full-spectrum daylight into the space, so that the required wavelengths are provided to a sufficient extent.
The method further comprises the step of: applying an ionising (electrically charging) system (also referred to as an electrostatic precipitator or ionizer, hereinafter referred to as ioniser https://nl.wikipedia.org/wiki/Ionisator en https://en.wikipedia.org/wiki/Air_ioniser) optionally combined with the lighting devices and/or lights including LEDs, whereby, among other things, but not exclusively, dust, dirt particles and micro-organisms are charged and thereby attracted to the surfaces of the walls and the objects in the space, in order to come into contact with the nano-oxide coating.
When due to a lack of a sufficient amount of daylight, the desired and required sterilizing, self-cleaning and/or self-disinfecting effect by applying the nano-oxide coating cannot be achieved, according to the invention this deficiency is overcome by providing one or more lighting devices, which are arranged for delivering and emitting artificially produced full-spectrum daylight into the (internal) space by means of lighting devices that are equipped with full-spectrum daylight lamps, preferably full- spectrum daylight LEDs, often referred to as "Full Spectrum Daylight" (FSD) LEDs, since these LEDs are highly energy efficient.
Additionally, ionisers can be applied in the space in order to enhance the deposition of particles, including bacteria and other pathogens, onto the surfaces of the coating.
The self-cleaning and self-disinfecting power and ability within the space is substantially increased according to the invention, when the antibacterial nano-oxide coating is applied both on the surfaces of the walls of the internal space, which walls form the space and delimit it, as well as on articles located within the space including furniture. Consequently the transfer and transport of pathogen and/or bacterial material is greatly reduced by means of the surfaces of objects, because these particles and (micro) organisms are now also oxidised by the radicals formed on the coated surfaces of the objects.
Full-spectrum daylight is necessary for the following reasons : it improves the contrast display and the light image display, so that the space can still be used for the intended purpose for which it is configured, while simultaneously the wavelengths are provided with sufficient energy to activate the coating. When only wavelengths are chosen needed for providing radical formation, then the space can no longer be used for its normal purpose and use-function, or additional lighting points must be installed to fix this problem.
For example, the full-spectrum daylight LEDs are part of the group of pseudo or LED fluorescent tubes, which are arranged and designed as replacements for conventional fluorescent lamps, which as a result may simply (or after some modification) be installed in conventional fluorescent fittings (fixtures) .
The light produced by the lighting devices comprising the full-spectrum daylight has preferably a colour temperature of at least 5500 K, more preferably at least 6000 K, and most preferably about 6450 K at a colour rendering index (CRI) of at least 80, preferably at least 90 and most preferably about 98. See for the concepts of colour temperature and colour rendering index https ://nl.wikipedia .org/wiki/Kleurtemperatuur a nd https ://en .wikipedia.org/wiki/Color_temperature respectively https ://nl.wikipedia .org/wiki/Kleurweergave-index a nd https ://en .wikipedia.org/wiki/Color_rendering_index.
Preferably, the lighting devices are arranged for additionally emitting (a substantial quantity) of ultraviolet (UV) radiation (ca . 10 to 420 nanometre or SI symbol : nm) into the internal space, complementary to the full-spectrum daylight. As a result, a better "match" is obtained with the sensitivity (for radical formation) of the nano-oxide coating to be activated by the lighting devices. Preferably, the ultraviolet radiation includes UV-A radiation (320-420 nm) and/or UV-B radiation (280-320 nm), for certain special applications also UV-C radiation ( 10-280 nm) is included . Application of UV radiation in the wavelength range 270-300 nm moreover results in the formation of vitamin D, which can have a positive effect on the "live stock" when it is located within the space (stable) concerned . See for UV radiation https ://nl.wikipedia .org/wiki/ultraviolet and https://en.wikipedia .org/wiki/Ultraviolet. As a result of the UV radiation being added to the (FSD) radiation emitted into the space, a better "match" can be achieved with the sensitivity of the nano-oxide coating activated (for radical formation) by the lighting devices. Consequently, the efficiency of the radical generation is increased, and more radicals will be formed, at a constant FSD radiation level.
This effect can be further optimized by adding Ti(0H)4 into the nano-oxide coating, so that radical formation occurs at a broader light spectrum. The application of ionisers in the space has the effect that, among others, but not exclusively, dust, dirt particles and micro-organisms are provided with an electric charge, so that these particles are attracted to the coated surfaces within the space and to the coated surfaces configuring the space, including floors, walls and objects, so that these particles come into contact with the deposited nano-oxide coating, where they are oxidized by the (oxygen) radicals. These ionisers can be applied within the space as separate systems, but may also be provided as combined systems together with the lighting devices and/or lights including LEDs.
In addition to the method discussed above, the invention also comprises any space that is configured according to said method. The invention also comprises any lighting device, which is arranged for emitting UV-A and / or UV-B and / or UV-C radiation in such a space, supplementary to full-spectrum daylight.
With respect to the nano-oxide coating, preferably this coating is applied by means of misting and/or foaming a solution in order to be able to guarantee a layer thickness of <50 micron, wherein the optimal layer thickness is considered to be about 30 micron.
The preferred average grain size of the nano-oxide particles of the nano-oxide coating is 50 - 75 nm, preferably 60 - 70 nm; preferably a size of approximately 62 nm is chosen as optimal average grain size.
Variations herein are dependent on the specific circumstances and/or application.
Preferably the nano-oxide coating comprises an addition of silver (including Ag+ ions) to the solution, thereby substantially enhancing the activity (for radical generation) of the coating. Preferably, a percentage of Ti(0H)4 is added to the nano-oxide coating in order to broaden the active spectrum of the light (up to about 350 - 650 nm) as an active working oxidation range. Preferably, a phosphate mineral is added for the purpose of improving the bonding between the nano-oxide particles and the internal surfaces configuring the space and/or the surfaces within said space. Preferably for this purpose, a phosphate mineral from the apatite group is used, for example, hydroxyapatite, fluorapatite and/or chlorapatite (see https://nl.wikipedia.org/wiki/Apatiet and https://en.wikipedia.org/wiki/Apatite). By this preferred measure, the nano-particles are advanced and promoted to the surface, so that they can better "react" there with the air. The nano-particles thereby act as a catalyst in the formation of radicals and provide a substantial contribution to the sterilization of the air.

Claims

1. Method for creating a sterile environment in a space having no or limited reception of natural light, comprising the steps of:
applying a coating containing nano-oxide particles, hereinafter referred to as nano-oxide coating, such as, for example, a Ti02 nano coating, on surfaces of, and/or surfaces within, said space;
applying or adapting one or more lighting devices, which are configured to emit artificially produced full-spectrum daylight into the space.
2. Method according to claim 1, wherein the method comprises the step of: applying an ionising system (ioniser) optionally combined with the lighting devices and/or lights including LEDs.
3. Method according to claim 1 - 2, wherein the nano-oxide coating is applied by means of misting and/or foaming.
4. Method according to claim 1 - 3, wherein the layer thickness of the nano-oxide coating is <50 micron, and preferably is about 30 micron.
5. Method according to any one of the preceding claims, wherein the average grain size of the nano-oxide particles of the nano-oxide coating is 50 - 75 nanometre, preferably is 55 - 70 nanometre, more preferably is approximately 62 nanometre.
6. Method according to any one of the preceding claims, wherein the nano-oxide coating comprises an addition of silver (Ag).
7. Method according to any one of the preceding claims, wherein the nano-oxide coating comprises an addition of Ti(OH)4.
8. Method according to any one of the preceding claims, comprising the use of a phosphate mineral for, or in order to promote, the bonding between the surfaces configuring the space and/or the surfaces within the space, and the coating with the nano-oxide particles.
9. Method according to claim 8, wherein the phosphate mineral comprises apatite, for example hydroxyapatite, and/or fluoroapatite and/or chlorapatite.
10. Method according to any one of the preceding claims, wherein the lighting devices comprise full-spectrum daylight lamps.
11. Method according to any one of the preceding claims, wherein the lighting devices comprise full-spectrum daylight LEDs.
12. Method according to any one of the preceding claims, wherein the light produced by the lighting devices has a colour temperature of at least 5500 K, more preferably of at least 6000 K and most preferably of about 6450 K.
13. Method according to any one of the preceding claims, wherein the light produced by the lighting devices has a colour rendering index (CRI) of at least 80, more preferably of at least 90, and most preferably of about 98.
14. Method according to any one of the preceding claims, wherein the lighting devices are adapted to emit ultraviolet radiation into the space.
15. Method according to claim 14, wherein said ultra-violet radiation comprises UV-A radiation.
16. Method according to claim 14 - 15, wherein said ultra-violet radiation comprises UV-B radiation.
17. Method according to claim 14 - 16, wherein said ultra-violet radiation comprises UV-C radiation.
18. Space, arranged according to a method according to any one of the preceding claims and comprising one or more surfaces with a nano-oxide coating, as well as one or more lighting devices, which devices are adapted to emit into the space artificially produced daylight and/or pseudo-daylight, or full-spectrum daylight and/or UV-A and/or UV-B and/or UV-C radiation.
19. Lighting device, adapted for carrying out the method according to claim 1 - 17 in a space according to claim 18, wherein artificially produced full-spectrum daylight is emitted, or artificially produced full-spectrum daylight and/or artificially generated UV-A and/or UV-B and/or UV-C radiation is emitted.
20. Lighting device according to claim 19, wherein the lighting device also comprises an ioniser.
21. Pseudo-fluorescent tube or LED fluorescent tube for use in the method according to claim 1 - 17, and for use in the lightning device according to claim 19 - 20, the pseudo-fluorescent tube or the LED fluorescent tube is arranged and configured as a substitute for a conventional fluorescent tube and adapted to be installed in a standard fluorescent fitting, the pseudo-fluorescent tube or LED fluorescent tube comprises an elongate support having a number of full- spectrum daylight LEDs (FSD LEDs).
PCT/NL2016/050116 2015-03-11 2016-02-18 Method for creating a sterile space WO2016144157A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16729393.5A EP3268055A2 (en) 2015-03-11 2016-02-18 Method for creating a sterile space

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NL1041224 2015-03-11
NL1041224A NL1041224B1 (en) 2015-03-11 2015-03-11 Method for creating a sterile space.

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WO2016144157A2 true WO2016144157A2 (en) 2016-09-15
WO2016144157A3 WO2016144157A3 (en) 2016-12-22

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US10180248B2 (en) 2015-09-02 2019-01-15 ProPhotonix Limited LED lamp with sensing capabilities
WO2022084147A1 (en) * 2020-10-19 2022-04-28 Signify Holding B.V. Lighting system

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