CN112067607A - Carbon monoxide indicating device - Google Patents
Carbon monoxide indicating device Download PDFInfo
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- CN112067607A CN112067607A CN202010939889.5A CN202010939889A CN112067607A CN 112067607 A CN112067607 A CN 112067607A CN 202010939889 A CN202010939889 A CN 202010939889A CN 112067607 A CN112067607 A CN 112067607A
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- cerium dioxide
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910002091 carbon monoxide Inorganic materials 0.000 title claims abstract description 94
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims abstract description 105
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims abstract description 102
- 239000000758 substrate Substances 0.000 claims abstract description 38
- 229910021645 metal ion Inorganic materials 0.000 claims abstract description 20
- 239000011230 binding agent Substances 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 148
- 239000000463 material Substances 0.000 claims description 32
- 239000002245 particle Substances 0.000 claims description 21
- 229920001577 copolymer Polymers 0.000 claims description 16
- 239000012790 adhesive layer Substances 0.000 claims description 15
- -1 titanium ions Chemical class 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910001453 nickel ion Inorganic materials 0.000 claims description 7
- 229910052726 zirconium Inorganic materials 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 5
- VEQPNABPJHWNSG-UHFFFAOYSA-N Nickel(2+) Chemical compound [Ni+2] VEQPNABPJHWNSG-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 229910001431 copper ion Inorganic materials 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052725 zinc Inorganic materials 0.000 claims description 4
- 239000011701 zinc Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 67
- 230000001681 protective effect Effects 0.000 abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 41
- 229910052760 oxygen Inorganic materials 0.000 description 41
- 239000001301 oxygen Substances 0.000 description 41
- 239000007789 gas Substances 0.000 description 37
- 125000004430 oxygen atom Chemical group O* 0.000 description 27
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 26
- 229910000420 cerium oxide Inorganic materials 0.000 description 18
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 18
- 239000013078 crystal Substances 0.000 description 17
- 238000006479 redox reaction Methods 0.000 description 15
- 229910002092 carbon dioxide Inorganic materials 0.000 description 13
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 12
- 239000001569 carbon dioxide Substances 0.000 description 12
- 230000007547 defect Effects 0.000 description 12
- 238000009413 insulation Methods 0.000 description 12
- 239000002073 nanorod Substances 0.000 description 11
- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000003197 catalytic effect Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000002070 nanowire Substances 0.000 description 6
- 239000004005 microsphere Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 4
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- AMQJEAYHLZJPGS-UHFFFAOYSA-N N-Pentanol Chemical compound CCCCCO AMQJEAYHLZJPGS-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229940044927 ceric oxide Drugs 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000033116 oxidation-reduction process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 208000001408 Carbon monoxide poisoning Diseases 0.000 description 1
- LCKIEQZJEYYRIY-UHFFFAOYSA-N Titanium ion Chemical compound [Ti+4] LCKIEQZJEYYRIY-UHFFFAOYSA-N 0.000 description 1
- 239000004964 aerogel Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229910000421 cerium(III) oxide Inorganic materials 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000012966 redox initiator Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- GBNDTYKAOXLLID-UHFFFAOYSA-N zirconium(4+) ion Chemical compound [Zr+4] GBNDTYKAOXLLID-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/775—Indicator and selective membrane
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Catalysts (AREA)
Abstract
The invention relates to a carbon monoxide indicating device, which comprises a substrate layer and an indicating layer arranged on the substrate layer, wherein the indicating layer comprises the following raw materials in parts by mass: 20-50 parts of nano cerium dioxide and 30-60 parts of a binder, wherein the nano cerium dioxide is doped with metal ion impurities. According to the carbon monoxide indicating device, the reaction temperature is reduced to 100 ℃ due to the fact that the indicating layer is doped with metal ions, when the indicating layer is arranged near the fire source, whether the fire source generates carbon monoxide gas or not can be detected at the first time, people can judge whether the room contains the carbon monoxide gas or not through the color of the indicating layer, and therefore whether protective measures are taken or not is determined. The carbon monoxide indicating device has the advantages of simple structure and low cost, greatly reduces the initial reaction temperature, and can repeatedly indicate carbon monoxide gas.
Description
Technical Field
The invention relates to the technical field of indicating equipment, in particular to a carbon monoxide indicating device.
Background
It is known that highly toxic carbon monoxide gas is easily generated when the combustion of a substance is insufficient, and since carbon monoxide gas is colorless and odorless, people cannot distinguish it by visual and olfactory methods. Thus, especially in winter, tragedy events of carbon monoxide poisoning and even death due to fire in a closed room still occur occasionally.
Most of the existing carbon monoxide indicating devices are electronic products, and on one hand, the carbon monoxide indicating devices are not popularized and used in a large area due to high price; on the other hand, since the electronic carbon monoxide indicator is generally installed above a wall far from a fire source by utilizing the characteristic that carbon monoxide is lighter than air, when the indicator gives an alarm, the carbon monoxide concentration in a room is often at a high level, and the danger is self-evident to people near a stove, so that the practicability of the electronic carbon monoxide indicator is not high. Although ceria is commonly used as a catalyst for the catalytic reaction of carbon monoxide, the reaction temperature is as high as 500 ℃, and the excessively high reaction temperature limits the application of the ceria in the field of carbon monoxide indication.
Disclosure of Invention
In view of this, there is a need for a carbon monoxide indicating device that is inexpensive and suitable for placement in the vicinity of a fire source.
A carbon monoxide indicating device comprising:
a base layer;
the indication layer is arranged on the basal layer and comprises the following raw materials in parts by mass: 20-50 parts of nano cerium dioxide and 30-60 parts of a binder, wherein the nano cerium dioxide is doped with metal ion impurities.
In one embodiment, the molar ratio of the metal ion to the cerium dioxide is 10 mol% to 20 mol%: 40-60 mol%.
In one embodiment, the metal ions are selected from at least one of nickel ions, copper ions, titanium ions, and zirconium ions.
In one embodiment, the nano ceria has a particle size of 10nm to 200 nm.
In one embodiment, the binder is selected from at least one of a methyl methacrylate-styrene-acrylic acid copolymer or a butyl acrylate-styrene-hydroxyethyl acrylate copolymer.
In one embodiment, the base layer material is a material having a thermal conductivity greater than 30.
In one embodiment, the base layer material is selected from any one of aluminum, zinc, copper, iron.
In one embodiment, the side of the substrate layer remote from the indicator layer is provided with a thermally insulating layer.
In one embodiment, the adhesive layer is disposed on a side of the substrate layer away from the indicator layer.
In one embodiment, the adhesive layer further comprises a release layer, and the release layer is arranged on one side of the adhesive layer away from the substrate layer.
According to the carbon monoxide indicating device, the initial reaction temperature of the indicating layer material is reduced to 100 ℃, a large number of micropores are formed between the indicating layer material molecules, carbon monoxide molecules can enter the indicating layer through the micropores to be in contact with nano cerium dioxide, after the temperature of the indicating layer reaches 100 ℃, active oxygen atoms on the surface of the cerium dioxide and the carbon monoxide undergo redox reaction, the carbon monoxide obtains oxygen atoms and is oxidized into carbon dioxide, and meanwhile, the oxygen atoms lost by the cerium dioxide are reduced into cerium oxide with oxygen cavities, and in the process, the color of the cerium oxide is changed from white to golden yellow. At the same time, the cerium oxide crystal produced by the reaction has oxygen holes which can absorb oxygen in the air, and when the oxygen holes absorb oxygen atoms, the cerium oxide is oxidized into cerium dioxide again. The nano-ceria has good oxygen storage and release capacity on the surface, and can be used as a catalytic indicator in the indicating layer. When the carbon monoxide indicating device is arranged near the fire source, the color change reaction can be promoted by using the heat of the fire source, and after the reaction is started, the indicating layer is changed from white to golden yellow, so that whether carbon monoxide gas exists in a room or not is indicated through visible color change, and whether protective measures are taken or not is determined.
Drawings
FIG. 1 is a schematic structural diagram of a carbon monoxide indicating device according to an embodiment;
FIG. 2 is a schematic structural diagram of another embodiment of a carbon monoxide indicating device;
FIG. 3 is a schematic structural diagram of another embodiment of a carbon monoxide indicating device;
fig. 4 is a schematic structural diagram of another embodiment of a carbon monoxide indicating device.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In this document, parts of each raw material refer to parts by weight unless otherwise specified.
One embodiment of a carbon monoxide indicating device 10, please refer to fig. 1, which includes: a base layer 100 and an indicator layer 200.
The substrate layer 100 is used to support the indicating layer 200, and since the initial reaction temperature of the indicating layer 200 is 100 ℃, the substrate layer 100 is required to have good heat resistance and thermal conductivity.
Specifically, the substrate layer 100 can resist a high temperature of more than 300 ℃, and the thermal conductivity coefficient thereof is greater than 30, so that on one hand, the substrate layer 100 can not be melted or burnt by heating near a fire source due to good high temperature resistance, and on the other hand, the substrate layer can rapidly obtain the heat of the fire source due to good thermal conductivity, so as to activate the color change reaction of the indication layer 200, and thus the substrate layer is in an activated state within a short time after the fire source is started.
Preferably, the substrate layer 100 can resist high temperature of more than 500 ℃, and has a thermal conductivity greater than 50, the optional material of the substrate layer 100 includes any one of aluminum, zinc, copper, and iron, and the substrate layer material has greatly enhanced weather resistance at high temperature, so that the stability of the indicating device 10 is greatly improved.
And an indicating layer 200 disposed on the substrate layer 100, wherein when the temperature of the indicating layer 200 is higher than the initial reaction temperature, the indicating layer 200 can undergo an oxidation-reduction color change reaction with carbon monoxide, thereby indicating whether carbon monoxide gas exists in the air near the fire source. In this embodiment, the initial reaction temperature is 100 ℃.
Specifically, the indicating layer 200 comprises the following raw materials in parts by mass: 20-50 parts of nano cerium dioxide and 30-60 parts of a binder, wherein the nano cerium dioxide is doped with metal ion impurities.
The nano ceria plays a catalytic indicating role in the indicating layer 200, and can perform oxidation-reduction reaction with carbon monoxide gas at high temperature, and the color of the reaction process changes, and the reaction chemical formula is as follows:
2CeO2+CO=Ce2O3+CO2
2Ce2O3+O2=4CeO2
the cerium dioxide has a crystal structure of a face-centered cubic, and the isotropic structural characteristics of the cerium dioxide make the cerium dioxide not easy to form a one-dimensional or two-dimensional structure and easy to form spherical nanoparticles. At a high temperature higher than 600 ℃, active oxygen atoms on the surface of the cerium dioxide are easy to generate oxidation-reduction reaction with carbon monoxide, and in the oxidation-reduction process, oxygen atoms of the cerium dioxide are lost to be reduced into cerium oxide with oxygen holes, so that carbon monoxide obtains oxygen atoms and is oxidized into carbon dioxide, and in the process, the color of the cerium dioxide is changed from white to golden yellow. Since the ceria crystal has oxygen holes, it can adsorb oxygen in the air, and when the oxygen holes adsorb oxygen atoms, the ceria is oxidized again to ceria. The nano cerium dioxide has good oxygen storage and release capacity on the surface, and can be used as a catalytic indicator in the indicating ink.
Specifically, nano-ceria particles are selected as the catalytic indicator material, and since the smaller the particle size of the particles, the larger the total or sub-surface area of the particles, the greater the discoloration reaction occurs at the surface or sub-surface of the nano-ceria, and thus, the rate of reaction thereof can be accelerated by selecting nano-materials as the catalytic indicator material.
Further, the shapes of particles such as nano microspheres, nano wires and nano rods are selected as catalytic indicator materials, and experiments prove that the shapes of the particles such as the nano microspheres, the nano wires and the nano rods are adopted as the catalytic indicator materials at the same temperature, so that the color change interval of the indicating layer 200 is obviously enlarged in the color change reaction process, the indicating effect is more obvious, and in addition, the cerium dioxide particles with the microstructure are beneficial to reducing the initial reaction temperature of the indicating layer 200.
Preferably, the nano ceria particles are nanowires formed by connecting nano microspheres in series, and the ceria particles with a nano structure can greatly reduce the redox initiation reaction temperature of the indicating layer 200 due to the special microstructure thereof.
In one embodiment, the particle size of the nano cerium dioxide particles is 10 nm-200 nm, so that the carbon monoxide indication ink meets the printability requirements of different printing modes, and in addition, the reduction of the particle size of the cerium dioxide particles is beneficial to enlarging the surface or the sub-surface of the cerium dioxide, thereby promoting the progress of the color change reaction.
Preferably, the particle size of the nano ceria is 10nm to 30nm, and by limiting the particle size of the nano ceria, the printability of the ink can be improved, and the initial reaction temperature of the indicating layer 200 can be reduced.
By doping metal ions, the lattice morphology of cerium dioxide can be changed, and the initial reaction temperature can be further effectively reduced. Different metal ions have different ionic radiuses or different valence states, different coordination conditions are formed in crystal lattices, lattice distortion defects are caused by generating lattice stress, the distortion defects are favorable for forming oxygen cavities, energy required by redox reaction is greatly reduced, and therefore the reaction temperature and the complete conversion temperature are reduced. Experiments prove that compared with pure cerium dioxide particles, the doped nano cerium dioxide particles can reduce the reaction temperature to 100 ℃ and the complete conversion temperature to 300 ℃ by doping metal ions.
Specifically, the molar ratio of the metal ions to the cerium dioxide is 10-20 mol%: 40-60 mol%, in the proportion range, the doping amount of the metal ions is positively correlated with the reaction activity, namely the higher the doping amount is, the lower the initial reaction temperature is, and conversely, the lower the doping amount is, the higher the initial reaction temperature is.
Further, the metal ion is selected from at least one of nickel ion, copper ion, titanium ion, and zirconium ion.
The binder functions as a film in the indicator layer 200, is resistant to high-temperature baking, and does not undergo a combustion or carbonization reaction at a high temperature of 500 ℃. The indicating layer 200 of the carbon monoxide indicating device 10 is firmly attached to the surface of the substrate layer 100 after being cured.
Specifically, the binder is soluble in the solvent, and after the binder is solidified, a large number of micropores are formed between molecules of the binder along with the volatilization of the solvent, so that carbon monoxide gas can enter the indicating layer 200 through the micropores to participate in the color change reaction. The solvent is at least one selected from ethanol, ethylene glycol, isopropanol, butanol, pentanol, cyclohexanol, acetone, cyclohexanone and water.
Further, the binder is selected from at least one of methyl methacrylate-styrene-acrylic acid copolymer or butyl acrylate-styrene-hydroxyethyl acrylate copolymer. The methyl methacrylate-styrene-acrylic acid copolymer and the butyl acrylate-styrene-hydroxyethyl acrylate copolymer have good high temperature resistance, and can not burn or carbonize at the high temperature of 500 ℃.
In one embodiment, the binder is a methyl methacrylate-styrene-acrylic acid copolymer having a molar ratio of methyl methacrylate to styrene to acrylic acid of 1:2: 2.
In one embodiment, the binder is a butyl acrylate-styrene-hydroxyethyl acrylate copolymer having a molar ratio of butyl acrylate to styrene, hydroxyethyl acrylate of 2:1: 2.
It is to be understood that other film-forming materials that are soluble in the solvent and resistant to high temperatures may also be used as binders in the present invention.
In some embodiments, referring to fig. 2, a thermal insulation layer 300 is disposed on a side of the substrate layer 100 away from the indicator layer 200, so as to prevent the substrate layer 100 from burning the human body at high temperature. The material of optional insulation layer 300 includes any one of clay, aerogel, cement, ceramic, and asbestos.
In some embodiments, referring to FIG. 3, the side of insulating layer 300 remote from substrate layer 100 is provided with an adhesive layer 400, such that indicator 10 may be attached to a surface of an object, and the optional adhesive layer may comprise any one of acrylic, polyurethane, and pressure sensitive adhesive.
In some embodiments, referring to fig. 4, a release layer 500 is disposed on a side of the adhesive layer 400 away from the thermal insulation layer 300, the release layer 500 is used to protect the adhesive layer 400 and prevent the adhesive layer 400 from being adhered to other objects before use, and optional materials of the release layer 500 include: silicone paper, laminating paper, it should be understood that other materials coated with silicone oil or paraffin can be used as the release layer material of the present invention.
In the carbon monoxide indicating device, the initial reaction temperature of the material of the indicating layer 200 is reduced to 100 ℃, a large number of micropores are formed between the connecting material molecules of the indicating layer 200, carbon monoxide molecules can enter the indicating layer 200 through the micropores to be contacted with nano cerium dioxide, after the temperature of the indicating layer 200 reaches 100 ℃, active oxygen atoms on the surface of the cerium dioxide and the carbon monoxide undergo redox reaction, the carbon monoxide obtains oxygen atoms and is oxidized into carbon dioxide, and meanwhile, the oxygen atoms lost by the cerium dioxide are reduced into cerium oxide with oxygen cavities, and in the process, the color of the cerium oxide is changed from white to golden yellow. At the same time, the cerium oxide crystal produced by the reaction has oxygen holes which can absorb oxygen in the air, and when the oxygen holes absorb oxygen atoms, the cerium oxide is oxidized into cerium dioxide again. The nano-ceria functions as a catalytic indicator in the indicator layer 200 due to its surface having good oxygen storage and release capabilities. When the carbon monoxide indicating device is arranged near the fire source, the color change reaction can be promoted by using the heat of the fire source, and after the reaction starts, the indicating layer 200 is changed from white to golden yellow, so that whether carbon monoxide gas exists in a room or not is indicated through visual color change, and whether protective measures are taken or not is determined.
The carbon monoxide indicating device provided by the invention has the advantages of simple structure and low cost, greatly reduces the initial reaction temperature, and can repeatedly indicate carbon monoxide gas.
Specific examples are as follows.
Example 1
Referring to fig. 1, the present embodiment provides a carbon monoxide indicating device 10, in which the carbon monoxide indicating device 10 includes a substrate layer 100 and an indicating layer 200.
The base layer 100 is made of an iron sheet, the indication layer 200 is arranged on the base layer 100, and the raw material composition of the indication layer comprises 20 parts of nano cerium dioxide and 30 parts of a connecting material, wherein the nano cerium dioxide is in the shape of nano microspheres, has a particle size of 10nm, and is doped with nickel ions, and the molar ratio of the nickel ions to the cerium dioxide is 10 mol%: 40 mol percent. The binder is a methyl methacrylate-styrene-acrylic acid copolymer, and the molar ratio of methyl methacrylate to styrene to acrylic acid is 1:2: 2.
Above-mentioned carbon monoxide indicating device, because ceric oxide dopes with nickel ion in the instruction layer 200, because between different metal ions, its ionic radius is different, or the valence state is different, form different coordination situation in the crystal lattice, and then cause crystal lattice distortion defect through producing crystal lattice stress, this distortion defect is favorable to forming oxygen cavity, make the required energy of redox reaction reduce by a wide margin, thereby reduce and play reaction temperature and complete conversion temperature, simultaneously, adopt nanometer microballon ceric oxide as the instruction catalyst, be favorable to reducing the initial reaction temperature. In this embodiment, the initial reaction temperature is reduced to 100 ℃, when the indicator layer 200 is placed near the fire source, the temperature of the indicator layer 200 rapidly reaches the initial reaction temperature or higher by the heat conduction of the substrate layer 100, when the fire source generates carbon monoxide gas due to incomplete combustion, the carbon monoxide gas enters the indicator layer 200 through the pores between the binder molecules and contacts the surface of the cerium oxide, the carbon oxide gas and the cerium oxide gas undergo redox reaction, the oxygen atoms of the cerium oxide are lost and reduced to form cerium oxide with oxygen vacancies, and at the same time, the carbon monoxide obtains oxygen atoms and is oxidized to carbon dioxide, and the color of the cerium oxide changes from white to golden yellow in the process. Because the ceria crystal has oxygen holes, it can absorb oxygen in the air, and when the oxygen holes absorb oxygen atoms, the ceria is oxidized into ceria again, so that the reaction continues. Since the indicating device is arranged near the fire source, whether the fire source generates carbon monoxide gas or not can be detected at the first time, and people near the fire source can judge whether the room contains the carbon monoxide gas or not through the color of the indicating layer 200, so as to decide whether to take protective measures or not.
Example 2
Referring to fig. 2, the present embodiment provides a carbon monoxide indicating device 20, which includes a substrate layer 100, an indicating layer 200, and a thermal insulation layer 300.
The material of the substrate layer 100 is a zinc sheet, the indication layer 200 is arranged on the substrate layer 100, and the raw material composition of the indication layer comprises 35 parts of nano cerium dioxide and 45 parts of a connecting material, wherein the nano cerium dioxide is a nanowire formed by connecting nano microspheres in series, the particle size of the nano cerium dioxide is 10nm, the length of the nanowire is 200nm, the nano cerium dioxide is doped with copper ions, and the molar ratio of the copper ions to the cerium dioxide is 15 mol%: 50 mol%. The connecting material is a butyl acrylate-styrene-hydroxyethyl acrylate copolymer, and the molar ratio of butyl acrylate to styrene to hydroxyethyl acrylate is 2:1: 2. The insulation layer 300 is disposed on a side of the substrate layer 100 away from the indication layer 200, and is made of clay.
According to the carbon monoxide indicating device, the indicating layer 200 is doped with nickel ions, different coordination conditions are formed in crystal lattices due to different metal ions and different ion radiuses or different valence states, lattice distortion defects are caused by generating lattice stress, the distortion defects are beneficial to forming oxygen holes, the energy required by redox reaction is greatly reduced, and the reaction temperature and the complete conversion temperature are reduced. Meanwhile, the cerium dioxide with a nanowire structure is used as an indication catalyst, which is beneficial to reducing the initial reaction temperature, in the embodiment, the initial reaction temperature is reduced to 100 ℃, when the cerium dioxide is placed near a fire source, the temperature of the indication layer 200 is rapidly increased to be higher than the initial reaction temperature through the heat conduction effect of the substrate layer 100, when the fire source generates carbon monoxide gas due to incomplete combustion, the carbon monoxide gas enters the indication layer 200 through pores among connecting material molecules and contacts with the surface of the cerium dioxide, the carbon dioxide gas and the cerium dioxide undergo redox reaction, the cerium dioxide loses oxygen atoms and is reduced into cerium oxide with oxygen cavities, so that simultaneously, the carbon monoxide obtains oxygen atoms and is oxidized into carbon dioxide, and in the process, the color of the cerium dioxide is changed from white to golden yellow. Because the ceria crystal has oxygen holes, it can absorb oxygen in the air, and when the oxygen holes absorb oxygen atoms, the ceria is oxidized into ceria again, so that the reaction continues. Since the indicating device is arranged near the fire source, whether the fire source generates carbon monoxide gas or not can be detected at the first time, and people near the fire source can judge whether the room contains the carbon monoxide gas or not through the color of the indicating layer 200, so as to decide whether to take protective measures or not. In addition, by arranging the heat insulation layer 300, the user can be prevented from being scalded.
Example 3
The present embodiment provides a carbon monoxide indicating device 30, which has a structure shown in fig. 3, and includes a substrate layer 100, an indicating layer 200, a heat insulating layer 300, and an adhesive layer 400.
The base layer 100 is made of copper sheet, the indication layer 200 is disposed on the base layer 100, and the raw material composition of the indication layer includes 40 parts of nano ceria and 50 parts of binder, wherein the nano ceria is shaped as a nanorod, the width of the end of the nanorod is 20nm, the length of the nanorod is 150nm, the nano ceria is doped with titanium ions, and the molar ratio of the titanium ions to the ceria is 20 mol%: 60 mol%. The connecting material is a butyl acrylate-styrene-hydroxyethyl acrylate copolymer, and the molar ratio of butyl acrylate to styrene to hydroxyethyl acrylate is 2:1: 2. The thermal insulation layer 300 is disposed on a side of the substrate layer 100 away from the indication layer 200, and is made of ceramic. The adhesive layer 400 is disposed on a side of the thermal insulation layer 300 away from the substrate layer 100, and is made of a pressure sensitive adhesive.
According to the carbon monoxide indicating device, the titanium ions are doped in the indicating layer 200, different coordination conditions are formed in crystal lattices due to different ion radiuses or different valence states among different metal ions, lattice distortion defects are caused by generating lattice stress, the distortion defects are beneficial to forming oxygen holes, energy required by redox reaction is greatly reduced, and therefore the reaction temperature and the complete conversion temperature are reduced. Meanwhile, the cerium dioxide with a nanorod structure is used as an indicating catalyst, which is beneficial to reducing the initial reaction temperature, in the embodiment, the initial reaction temperature is reduced to 100 ℃, when the cerium dioxide is placed near a fire source, the temperature of the indicating layer 200 is rapidly increased to be higher than the initial reaction temperature through the heat conduction effect of the substrate layer 100, when the fire source generates carbon monoxide gas due to incomplete combustion, the carbon monoxide gas enters the indicating layer 200 through pores among connecting material molecules and contacts with the surface of the cerium dioxide, the carbon dioxide gas and the cerium dioxide gas undergo redox reaction, the oxygen atoms of the cerium dioxide are reduced into cerium oxide with oxygen holes, so that the carbon monoxide obtains the oxygen atoms and is oxidized into carbon dioxide, and in the process, the color of the cerium dioxide is changed from white to golden yellow. Because the ceria crystal has oxygen holes, it can absorb oxygen in the air, and when the oxygen holes absorb oxygen atoms, the ceria is oxidized into ceria again, so that the reaction continues. Since the indicating device is arranged near the fire source, whether the fire source generates carbon monoxide gas or not can be detected at the first time, and people near the fire source can judge whether the room contains the carbon monoxide gas or not through the color of the indicating layer 200, so as to decide whether to take protective measures or not.
Example 4
Referring to fig. 4, the present embodiment provides a carbon monoxide indicating device 40, which includes a substrate layer 100, an indicating layer 200, a thermal insulation layer 300, an adhesive layer 400, and a release layer 500.
The base layer 100 is made of copper sheet, the indication layer 200 is arranged on the base layer 100, and the raw material composition of the indication layer comprises 50 parts of nano cerium dioxide and 60 parts of connecting material, wherein the nano cerium dioxide is shaped as a nanorod, the width of the end of the nanorod is 15nm, the length of the nanorod is 200nm, the nano cerium dioxide is doped with zirconium ions, and the molar ratio of the zirconium ions to the cerium dioxide is 16 mol%: 50 mol%. The connecting material is a butyl acrylate-styrene-hydroxyethyl acrylate copolymer, and the molar ratio of butyl acrylate to styrene to hydroxyethyl acrylate is 2:1: 2. The thermal insulation layer 300 is disposed on a side of the substrate layer 100 away from the indication layer 200, and is made of ceramic. The adhesive layer 400 is disposed on a side of the heat insulation layer 300 away from the substrate layer 100, and is made of a pressure sensitive adhesive, and the release layer 500 is disposed on a side of the adhesive layer 400 away from the heat insulation layer 300. When the indicating device is used, the release layer 500 is removed, and the indicating device is attached to the fire source accessory.
According to the carbon monoxide indicating device, zirconium ions are doped in the indicating layer 200, different coordination conditions are formed in crystal lattices due to different ion radiuses or different valence states among different metal ions, lattice distortion defects are caused by generating lattice stress, the distortion defects are beneficial to forming oxygen holes, energy required by redox reaction is greatly reduced, and therefore the reaction temperature and the complete conversion temperature are reduced. Meanwhile, the cerium dioxide with a nanorod structure is used as an indicating catalyst, which is beneficial to reducing the initial reaction temperature, in the embodiment, the initial reaction temperature is reduced to 100 ℃, when the cerium dioxide is placed near a fire source, the temperature of the indicating layer 200 is rapidly increased to be higher than the initial reaction temperature through the heat conduction effect of the substrate layer 100, when the fire source generates carbon monoxide gas due to incomplete combustion, the carbon monoxide gas enters the indicating layer 200 through pores among connecting material molecules and contacts with the surface of the cerium dioxide, the carbon dioxide gas and the cerium dioxide gas undergo redox reaction, the oxygen atoms of the cerium dioxide are reduced into cerium oxide with oxygen holes, so that the carbon monoxide obtains the oxygen atoms and is oxidized into carbon dioxide, and in the process, the color of the cerium dioxide is changed from white to golden yellow. Because the ceria crystal has oxygen holes, it can absorb oxygen in the air, and when the oxygen holes absorb oxygen atoms, the ceria is oxidized into ceria again, so that the reaction continues. Since the indicating device is arranged near the fire source, whether the fire source generates carbon monoxide gas or not can be detected at the first time, and people near the fire source can judge whether the room contains the carbon monoxide gas or not through the color of the indicating layer 200, so as to decide whether to take protective measures or not.
Example 5
The carbon monoxide indicating device provided by the embodiment is similar to that of the embodiment 4, except that: (1) the binder of the indicating ink is a mixture of methyl methacrylate-styrene-acrylic acid copolymer and butyl acrylate-styrene-hydroxyethyl acrylate copolymer, the weight percentage is 1:1, and the content of (2) dispersant is 5 parts.
According to the carbon monoxide indicating device, zirconium ions are doped in the indicating layer 200, different coordination conditions are formed in crystal lattices due to different ion radiuses or different valence states among different metal ions, lattice distortion defects are caused by generating lattice stress, the distortion defects are beneficial to forming oxygen holes, energy required by redox reaction is greatly reduced, and therefore the reaction temperature and the complete conversion temperature are reduced. Meanwhile, the cerium dioxide with a nanorod structure is used as an indicating catalyst, which is beneficial to reducing the initial reaction temperature, in the embodiment, the initial reaction temperature is reduced to 100 ℃, when the cerium dioxide is placed near a fire source, the temperature of the indicating layer 200 is rapidly increased to be higher than the initial reaction temperature through the heat conduction effect of the substrate layer 100, when the fire source generates carbon monoxide gas due to incomplete combustion, the carbon monoxide gas enters the indicating layer 200 through pores among connecting material molecules and contacts with the surface of the cerium dioxide, the carbon dioxide gas and the cerium dioxide gas undergo redox reaction, the oxygen atoms of the cerium dioxide are reduced into cerium oxide with oxygen holes, so that the carbon monoxide obtains the oxygen atoms and is oxidized into carbon dioxide, and in the process, the color of the cerium dioxide is changed from white to golden yellow. Because the ceria crystal has oxygen holes, it can absorb oxygen in the air, and when the oxygen holes absorb oxygen atoms, the ceria is oxidized into ceria again, so that the reaction continues. Since the indicating device is arranged near the fire source, whether the fire source generates carbon monoxide gas or not can be detected at the first time, and people near the fire source can judge whether the room contains the carbon monoxide gas or not through the color of the indicating layer 200, so as to decide whether to take protective measures or not.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A carbon monoxide indicating device, comprising:
a base layer;
the indication layer is arranged on the basal layer and comprises the following raw materials in parts by mass: 20-50 parts of nano cerium dioxide and 30-60 parts of a binder, wherein the nano cerium dioxide is doped with metal ion impurities.
2. The carbon monoxide indicating device of claim 1, wherein the molar ratio of the metal ions to the cerium dioxide is 10 mol% to 20 mol%: 40-60 mol%.
3. The carbon monoxide indicating device of claim 2, wherein the metal ions are selected from at least one of nickel ions, copper ions, titanium ions, and zirconium ions.
4. The carbon monoxide indicating device of claim 3, wherein the nano ceria has a particle size of 10nm to 200 nm.
5. The carbon monoxide indicating device of claim 4, wherein the binder is selected from at least one of methyl methacrylate-styrene-acrylic acid copolymer or butyl acrylate-styrene-hydroxyethyl acrylate copolymer.
6. The carbon monoxide indicating device of claim 1, wherein the base layer material is a material having a thermal conductivity greater than 30.
7. The carbon monoxide indicating device of claim 6, wherein the base layer material is selected from any one of aluminum, zinc, copper and iron.
8. The carbon monoxide indicating device of claim 7, wherein the substrate layer is provided with a thermally insulating layer on a side thereof remote from the indicator layer.
9. The carbon monoxide indicating device of claim 1, further comprising an adhesive layer disposed on a side of the substrate layer remote from the indicator layer.
10. The carbon monoxide indicating device of claim 9, further comprising a release layer disposed on a side of the adhesive layer remote from the substrate layer.
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