CN110627457A - Luminous mortar and preparation method thereof - Google Patents
Luminous mortar and preparation method thereof Download PDFInfo
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- CN110627457A CN110627457A CN201911073906.5A CN201911073906A CN110627457A CN 110627457 A CN110627457 A CN 110627457A CN 201911073906 A CN201911073906 A CN 201911073906A CN 110627457 A CN110627457 A CN 110627457A
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- Prior art keywords
- mortar
- luminescent
- solution
- powder
- luminous
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- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 95
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 111
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000004568 cement Substances 0.000 claims abstract description 26
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 14
- 239000000243 solution Substances 0.000 claims description 60
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 46
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 39
- 239000002243 precursor Substances 0.000 claims description 30
- 238000001354 calcination Methods 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 16
- 239000000377 silicon dioxide Substances 0.000 claims description 16
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 15
- 239000006004 Quartz sand Substances 0.000 claims description 14
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 14
- 239000002270 dispersing agent Substances 0.000 claims description 13
- 229910052916 barium silicate Inorganic materials 0.000 claims description 12
- HMOQPOVBDRFNIU-UHFFFAOYSA-N barium(2+);dioxido(oxo)silane Chemical compound [Ba+2].[O-][Si]([O-])=O HMOQPOVBDRFNIU-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 235000012239 silicon dioxide Nutrition 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000012298 atmosphere Substances 0.000 claims description 4
- 229920005646 polycarboxylate Polymers 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000008030 superplasticizer Substances 0.000 claims description 3
- 230000002688 persistence Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 18
- 238000005286 illumination Methods 0.000 abstract description 7
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 11
- 239000000463 material Substances 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 7
- 231100000719 pollutant Toxicity 0.000 description 7
- 229910001632 barium fluoride Inorganic materials 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 3
- 238000004020 luminiscence type Methods 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 2
- 241000700605 Viruses Species 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000001699 photocatalysis Effects 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000001291 vacuum drying Methods 0.000 description 2
- 238000003828 vacuum filtration Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 244000007853 Sarothamnus scoparius Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229910003440 dysprosium oxide Inorganic materials 0.000 description 1
- GEZAXHSNIQTPMM-UHFFFAOYSA-N dysprosium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Dy+3].[Dy+3] GEZAXHSNIQTPMM-UHFFFAOYSA-N 0.000 description 1
- NLQFUUYNQFMIJW-UHFFFAOYSA-N dysprosium(III) oxide Inorganic materials O=[Dy]O[Dy]=O NLQFUUYNQFMIJW-UHFFFAOYSA-N 0.000 description 1
- JKGITWJSGDFJKO-UHFFFAOYSA-N ethoxy(trihydroxy)silane Chemical compound CCO[Si](O)(O)O JKGITWJSGDFJKO-UHFFFAOYSA-N 0.000 description 1
- 229910001940 europium oxide Inorganic materials 0.000 description 1
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 description 1
- RSEIMSPAXMNYFJ-UHFFFAOYSA-N europium(III) oxide Inorganic materials O=[Eu]O[Eu]=O RSEIMSPAXMNYFJ-UHFFFAOYSA-N 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011146 organic particle Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/043—Alkaline-earth metal silicates, e.g. wollastonite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1055—Coating or impregnating with inorganic materials
- C04B20/1066—Oxides, Hydroxides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7792—Aluminates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2061—Materials containing photocatalysts, e.g. TiO2, for avoiding staining by air pollutants or the like
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
- C04B2111/807—Luminescent or fluorescent materials
Abstract
The invention discloses a luminescent mortar and a preparation method thereof, wherein the luminescent mortar comprises cement-based powder, long-afterglow luminescent powder, titanium dioxide and water. The luminous mortar has the advantages that the long-afterglow luminous powder is introduced, so that the luminous mortar realizes the night luminous effect, provides the illumination effect for the stair channel, saves energy, and provides safety guarantee for the construction or walking of construction workers.
Description
Technical Field
The invention relates to the technical field of mortar, in particular to luminous mortar and a preparation method thereof.
Background
In the construction stage, the construction site environment is generally severe, the lighting condition is often lacked at night, and related luminous warning facilities are not provided. Therefore, when a building worker is in construction or walking on a stair channel, a lot of inconvenience and potential safety hazards often exist.
Disclosure of Invention
The invention mainly aims to provide luminous mortar, aims to realize night illumination of a stair channel, saves energy and provides safety guarantee for construction workers in the stair channel or walking.
In order to achieve the purpose, the luminous mortar provided by the invention comprises cement-based powder, long-afterglow luminous powder, titanium dioxide and water.
Optionally, the long afterglow luminescent powder is silicate luminescent powder coated on the surface of silicon dioxide, and the silicate luminescent powder is Eu2+And Dy3+Co-doped barium silicate.
Optionally, in the silicate luminescent powder, Eu2+The molar concentration of the active component is 0.003 to 0.008 percent, and Dy3+The molar concentration of the organic acid is 0.005 to 0.01 percent.
Optionally, the Eu2+And Dy3+The preparation process of the co-doped barium silicate comprises the following steps:
using tetraethoxysilane and Eu (NO)3)3Solution, Dy (NO)3)3Solution, Ba (NO)3)2Preparing precursor gel by using the solution and the fluxing agent;
drying the precursor gel to obtain a precursor xerogel;
calcining the precursor xerogel in a reducing atmosphere to obtain Eu2+And Dy3+Co-doped barium silicate.
Alternatively, the "uses ethyl orthosilicate, Eu (NO)3)3Solution, Dy (NO)3)3Solution, Ba (NO)3)2Solution and fluxing agent, and the step of preparing precursor gel comprises the following steps:
preparation of Dy (NO) separately3)3Solution, Ba (NO)3)2Solution, Eu (NO)3)3A solution;
mixing tetraethoxysilane and Ba (NO)3)2Solution, said Eu (NO)3)3Solution of Dy (NO)3)3And a fluxing agent to obtain a mixed solution;
and heating the mixed solution in a water bath and stirring to hydrolyze the tetraethoxysilane to obtain precursor gel.
Alternatively, in the step of "calcining the precursor xerogel", the calcination temperature of the precursor xerogel is 1200 ℃ to 1400 ℃ and the calcination time is 4 hours to 5 hours.
Optionally, the silica surface coating process of the silicate luminescent powder is as follows:
dispersing silica sol in water to obtain a dispersion solution;
under the heating condition, adding silicate luminescent powder into the dispersion solution and stirring to obtain a precipitation solution;
and carrying out solid-liquid separation on the precipitation solution, and drying to obtain the silicate luminescent powder coated on the surface of the silicon dioxide.
Optionally, the mass ratio of the silicate luminescent powder to the silica sol is (8-12): 1.
Optionally, the cement-based powder includes white cement, quartz sand, a dispersant, and a polycarboxylic acid water reducer.
The invention also provides a preparation method of the luminescent mortar, which comprises the following steps:
mixing titanium dioxide, long-afterglow luminescent powder, a polycarboxylate superplasticizer and a dispersant to obtain a mixture, and adding white cement and quartz sand into the mixture to obtain mortar powder; and adding water into the mortar powder and uniformly mixing to obtain the luminous mortar.
In the technical scheme of the invention, the luminous mortar comprises cement-based powder, long-afterglow luminous powder, titanium dioxide and water. The invention introduces long-afterglow luminescent powder, which is also called light-storing luminescent material and is a photoluminescent material essentially, and the long-afterglow luminescent powder can continuously emit light at night after being irradiated by light sources such as natural light, fluorescent lamps, incandescent lamps and the like. Therefore, the luminous mortar added with the long afterglow luminous powder can emit light at night, and when the luminous mortar is applied to a stair channel, the night illumination of the stair channel is realized, so that the energy is saved, and meanwhile, construction or walking of construction workers in the stair channel is facilitated. The luminous mortar has the advantages that the long-afterglow luminous powder is introduced, so that the luminous mortar realizes the night luminous effect, provides the illumination effect for the stair channel, saves energy, and provides safety guarantee for the construction or walking of construction workers.
Meanwhile, in the technical scheme of the invention, titanium dioxide is introduced, has good photocatalysis effect, and can effectively decompose organic matters under the excitation of light (natural light, fluorescent lamp, incandescent lamp and the like). Therefore, the long-afterglow luminescent powder and the titanium dioxide are introduced into the luminescent mortar at the same time, and under the luminescence excitation of the long-afterglow luminescent powder, the titanium dioxide can decompose pollutants on the surface of the luminescent mortar coating at night and purify pollutants such as nitric oxide, volatile compounds, bacteria, viruses and the like in the air, so that the self-cleaning effect of the surface of the luminescent mortar coating is achieved, and the health of construction workers is guaranteed.
Drawings
FIG. 1 is a schematic view of a reserved groove made by a batten in the construction process of the stair passageway;
FIG. 2 is a schematic view of the filling of the luminous mortar during the construction of the stairway passage according to the invention;
FIG. 3 is a schematic view of a staircase channel after completion of the construction of the luminous mortar of the present invention;
FIG. 4 is a schematic view of the staircase tunnel of the present invention showing nighttime illumination;
the reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Stair step | 300 | Luminescent mortar coating |
| 200 | Wood block |
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The invention provides a luminous mortar.
In an embodiment of the invention, the luminescent mortar comprises cement-based powder, long-afterglow luminescent powder, titanium dioxide and water.
In the technical scheme of the invention, the luminous mortar comprises cement-based powder, long-afterglow luminous powder, titanium dioxide and water. The invention introduces long-afterglow luminescent powder, which is also called light-storing luminescent material and is a photoluminescent material essentially, and the long-afterglow luminescent powder can continuously emit light at night after being irradiated by light sources such as natural light, fluorescent lamps, incandescent lamps and the like. Therefore, the luminous mortar added with the long afterglow luminous powder can emit light at night, and when the luminous mortar is applied to a stair channel, the stair channel can illuminate at night, so that construction workers can construct or walk on stairs conveniently. The luminous mortar has the advantages that the long-afterglow luminous powder is introduced, so that the luminous mortar realizes the night luminous effect, provides the illumination effect for the stair channel, saves energy, and provides safety guarantee for the construction or walking of construction workers.
The invention is characterized in that the long afterglow luminescent powder is directly mixed to prepare the luminescent mortar, the preparation process is simple, the overall cost of the luminescent mortar can be reduced, and the luminescent mortar has good mechanical properties. Because the light-emitting intensity of the light-emitting material is reduced due to the fact that cement, sand and other non-transparent materials are combined, the light-emitting mortar avoids excessive loss of the light-emitting intensity of the light-emitting material by adopting cement-based powder with reasonable components, and meets the requirement of the light-emitting intensity while meeting the requirement of mechanical properties.
The stair channel generally has more pollutants, organic pollutants are attached to the coating and can influence the luminous effect of the luminous mortar, meanwhile, the stair channel is poor in ventilation and has more pollutants in the air, the health of workers is seriously influenced, and titanium dioxide is doped in the luminous mortar. Preferably, the titanium dioxide is 10 nm-40 nm anatase type nano titanium dioxide powder, which has good photocatalysis effect, and can decompose or convert pollutants in organic particles and air under the excitation of the luminescence of the long-afterglow luminescent powder, decompose pollutants on the surface of a coating, purify pollutants such as nitric oxide, volatile compounds, bacteria, viruses and the like in the air and enable the luminescent mortar to have self-cleaning function. The nano titanium dioxide powder loses the catalytic action under the condition of no light source at night, but the night luminescence of the luminescent mortar can be continuously used as an excitation light source of the nano titanium dioxide photocatalyst, so that the luminescent mortar has a self-cleaning function at night. Meanwhile, the refractive index of the nano titanium dioxide powder reaches 2.7, the whiteness reaches more than 98, the nano titanium dioxide powder is a high-reflection material, the brightness of the luminous mortar can be obviously increased, and the nano titanium dioxide powder and the long-afterglow luminous powder have good mutual promotion and synergistic effects.
In an embodiment of the present invention, the cement-based powder includes white cement, quartz sand, a dispersant and a polycarboxylic acid water reducer. Preferably, the white cement is white Portland cement with the grade of 42.5-52.5 and the whiteness of more than 95. The white portland cement serving as a main cementing material of the luminescent mortar can ensure the strength of the luminescent mortar on one hand, and adopts high-whiteness cement on the other hand, so that the counter-emitting effect of the luminescent mortar is fully enhanced, and the brightness of the luminescent mortar is improved. Preferably, the quartz sand has a particle size of 0.5mm to 1mm and a whiteness of 95 or more. On one hand, the quartz sand with larger grain size is adopted, so that the gaps among the aggregates can be improved, the long afterglow luminescent powder is more fully filled, and the luminescent effect is better shown; on the other hand, the high-whiteness quartz sand is adopted, so that the counter-emitting effect of the luminous mortar is enhanced again, and the brightness of the luminous mortar is improved. Preferably, the dispersant is a polycarboxylate dispersant. The long afterglow luminescent powder can reduce the workability of the mortar to a certain extent, and the invention improves the workability of the mortar, reduces the water-cement ratio and ensures the strength of the mortar by adding a proper amount of polycarboxylic acid water reducing agent.
In an embodiment of the present invention, the long afterglow luminescent powder is silicate luminescent powder coated on the surface of silicon dioxide. Sulfide type luminescent powder has various luminescent colors, but has unstable chemical properties, low afterglow brightness and short afterglow time. The aluminate type luminescent powder has high luminous intensity, long afterglow time and poor water resistance. The embodiment of the invention adopts silicate luminescent powder, and the silicate luminescent powder has higher luminescent intensity, longer afterglow time, good water resistance and low cost. However, the silicate luminescent powder is easy to self-aggregate and unevenly disperse in water, which affects the luminescent effect of the luminescent powder, and the surface of the silicate luminescent powder is coated with SiO by using silica sol through a liquid phase method2The silicate luminescent powder can be prevented from self-aggregation, the dispersity of the silicate luminescent powder is greatly improved, and the water resistance of the silicate luminescent powder is improved.
In one embodiment of the present invention, the silicateThe luminescent powder is Eu2+And Dy3+Co-doped barium silicate. The construction time at night is generally 6 to 10 o' clock at night, human eyes are most sensitive to green light of 555nm, and the green light has better illumination effect than red light, blue light and the like, therefore, the Eu is adopted by the invention2+And Dy3+Co-doped barium silicate. In the embodiment of the present invention, the Eu2+And Dy3+The co-doped barium silicate can emit light green light with the wavelength of 502nm, the afterglow time is longer than 6h, the cost is low, and the water resistance is good.
In an embodiment of the present invention, Eu is selected from the silicate phosphor2+The molar concentration of the active component is 0.003 to 0.008 percent, and Dy3+The molar concentration of the organic acid is 0.005 to 0.01 percent. Activator Eu2+The content can significantly affect the luminescent effect of the luminescent powder, and along with Eu2+The concentration is gradually increased, the luminescent centers of the luminescent powder are gradually increased, the luminous intensity is gradually improved, when Eu is used2+The content is increased to a certain degree, and Eu is continuously increased2+The concentration, Eu-Eu interaction, increases, causing quenching of a portion of the luminescent centers, resulting in a decrease in the luminescent intensity of the luminescent powder. When activating agent Eu2+When the molar concentration is 0.005 mol%, the luminescent powder has the best luminous intensity. Preferably, the Eu2+The molar concentration of (b) is 0.005 mol%. Dy (Dy)3+The addition of the silicate luminescent powder can obviously improve the luminescent intensity of the silicate luminescent powder and prolong the long afterglow time of the silicate luminescent powder. Preferably, the Dy3+The molar concentration of (c) was 0.008%. The embodiment of the invention adjusts Eu2+Molar concentration of Dy and Dy3+The silicate luminescent powder with high luminescent performance is prepared according to the molar concentration of the silicate.
In an embodiment of the present invention, the Eu2+And Dy3+The preparation process of the co-doped barium silicate comprises the following steps: using tetraethoxysilane and Eu (NO)3)3Solution, Dy (NO)3)3Solution, Ba (NO)3)2Preparing precursor gel by using the solution and the fluxing agent; drying the precursor gel to obtain a precursor xerogel; calcining the precursor xerogel in a reducing atmosphere to obtain Eu2+And Dy3+Co-doped barium silicate. The flux is BaF2Ethyl orthosilicate, Ba (NO)3)2Solution, Eu (NO)3)3Solution, Dy (NO)3)3Solution and BaF2The amount ratio of the substances (A) is 1:1:0.005:0.008: 0.003. In addition, the precursor gel can be put into a drying oven for drying, the drying temperature is 105 ℃, and the drying time is 20 hours, of course, the drying temperature and the drying time can also be properly adjusted, the invention is not limited to the drying temperature, and the above drying modes are all within the protection scope of the invention.
In one embodiment of the present invention, the "adopts tetraethoxysilane and Eu (NO)3)3Solution, Dy (NO)3)3Solution, Ba (NO)3)2Solution and fluxing agent, and the step of preparing precursor gel comprises the following steps: preparation of Dy (NO) separately3)3Solution, Ba (NO)3)2Solution, Eu (NO)3)3A solution; mixing tetraethoxysilane and Ba (NO)3)2Solution, said Eu (NO)3)3Solution of Dy (NO)3)3And BaF2Obtaining a mixed solution; the mixture was heated in a water bath and stirred to hydrolyze the ethyl orthosilicate to obtain a precursor gel. The Eu (NO) is3)3Solution is prepared by mixing europium oxide (Eu)2O3) Dy (NO) prepared by dissolving in nitric acid3)3Dysprosium oxide (Dy) is dissolved in a solvent2O3) Prepared by dissolving in nitric acid, Ba (NO)3)2The solution was prepared by dissolving barium oxide (BaO) in nitric acid. In addition, BaF2Is taken as a cosolvent. In addition, the temperature of the water bath heating can be 50-80 ℃, the mixed solution is converted into a sol state along with the water bath heating, the heating is continued, the tetraethoxysilane is fully hydrolyzed, and the mixed solution is converted into a gel state from the sol state, so that the precursor gel is obtained.
In one embodiment of the present invention, in the step of calcining the precursor xerogel, the calcination temperature of the precursor xerogel is 1200 ℃ to 1400 ℃, and the calcination time is 4 hours to 5 hours. Book (I)The invention obtains Eu through calcination preparation by adjusting calcination temperature and calcination time2+And Dy3+Co-doped barium silicate. Preferably, the calcination temperature is 1350 ℃ and the calcination time is 4.5 hours, so that BaSiO is ensured3:Eu2+,Dy3+The light emission intensity of (1).
In an embodiment of the present invention, a silica surface coating process of the silicate luminescent powder is as follows: dispersing silica sol in water to obtain a dispersion solution; under the heating condition, adding silicate luminescent powder into the dispersion solution and stirring to obtain a precipitation solution; and carrying out solid-liquid separation on the precipitation solution, and drying to obtain the silicate luminescent powder coated on the surface of the silicon dioxide. It should be noted that the silica sol can be uniformly dispersed in the water by stirring, generally, the stirring time is 10min, but of course, the stirring time can also be properly adjusted, after the silica sol is uniformly dispersed by stirring, the silicate luminescent powder is added into the dispersion solution, the temperature is slowly raised to 60 ℃, and under the condition, the silica sol is rapidly stirred for 30min, so that the silica in the silica sol is uniformly adsorbed on the surface of the silicate luminescent powder. Thus, after settling for a period of time, the silicate luminescent powder coated on the surface of the silicon dioxide can be obtained through vacuum filtration and drying.
In one embodiment of the invention, the mass ratio of the silicate luminescent powder to the silica sol is (8-12): 1. The luminous effect of the silicate luminescent powder can be influenced by excessive consumption of the silica sol, preferably, the mass ratio of the silicate luminescent powder to the silica sol is 10:1, and the luminous intensity of the long-afterglow luminescent powder is ensured on the basis that the surface of the silicate luminescent powder is effectively coated with the silicon dioxide.
In an embodiment of the invention, the luminescent mortar comprises, by mass, 100 to 120 parts of white cement, 100 to 120 parts of quartz sand, 30 to 50 parts of long-afterglow luminescent powder, 0.5 to 1 part of nano titanium dioxide powder, 1 to 2 parts of polycarboxylic acid water reducing agent, 1 to 2 parts of dispersing agent and 60 to 100 parts of water. The intensity of the luminous mortar can be reduced and the cost of the luminous mortar can be increased due to excessive doping amount of the long afterglow luminous powder; the doping amount is too small, the luminous effect can not meet the requirement, and the doping amount of the long afterglow luminous powder is 30 to 50 percent of that of the white cement in comprehensive consideration.
The invention further provides a preparation method of the luminescent mortar, which comprises the luminescent mortar, the luminescent mortar refers to the above embodiment, and as the luminescent mortar adopts all technical schemes of the above embodiment, the luminescent mortar at least has all beneficial effects brought by the technical schemes of the above embodiment, and further description is omitted. The embodiment of the invention provides a preparation method of luminous mortar, which comprises the following steps: mixing titanium dioxide, long-afterglow luminescent powder, a polycarboxylate superplasticizer and a dispersant to obtain a mixture, and adding white cement and quartz sand into the mixture to obtain mortar powder; and adding water into the mortar powder and uniformly mixing to obtain the luminous mortar. The luminescent mortar provided by the embodiment of the invention has the advantages of simple manufacturing process, low cost, good mechanical property and high luminescent intensity.
Specifically, the preparation method of the luminescent mortar comprises the following steps:
preparing silicate luminescent powder: first, with HNO3Respectively dissolve Eu2O3、Dy2O3And BaO to obtain Eu (NO)3)3Solution, Dy (NO)3)3Solution and Ba (NO)3)2A solution; then, ethyl orthosilicate and Ba (NO) are added into a container in sequence3)2Solution, Eu (NO)3)3Solution, Dy (NO)3)3Solution and BaF2Obtaining a mixed solution, and stirring the mixed solution for 2 hours; then, heating the mixed solution in a water bath to a sol state, and continuing the water bath to fully hydrolyze ethyl orthosilicate to obtain precursor gel; then putting the precursor gel into a drying oven, and drying for 20 hours at 105 ℃ to obtain a precursor xerogel; finally, under the reducing atmosphere condition, the precursor xerogel is calcined for 4.5 hours at 1350 ℃ to prepare BaSiO3:Eu2+,Dy3+Luminescent powder.
BaSiO coated on silicon dioxide surface3:Eu2+,Dy3+Preparing luminescent powder: dispersing silica sol in deionized water, and stirring 1Dispersing for 0min, slowly heating to 60 deg.C, and adding BaSiO3:Eu2+,Dy3+The luminescent powder is quickly stirred for 30min to 40min at constant temperature to ensure that SiO in the silica sol2Is uniformly adsorbed to BaSiO3:Eu2+,Dy3+Precipitating the surface of the luminescent powder for a period of time, performing vacuum filtration, and drying at 80 ℃ to obtain the BaSiO coated on the surface of the silicon dioxide3:Eu2+,Dy3+Luminescent powder.
Preparing the luminous mortar: mixing nano titanium dioxide powder and silicon dioxide surface-coated BaSiO3:Eu2+,Dy3+The preparation method comprises the following steps of (1) obtaining a mixture by using luminescent powder, a polycarboxylic acid water reducing agent and a dispersing agent, and adding white cement and quartz sand into the mixture to obtain mortar powder; and adding water into the mortar powder and uniformly mixing to obtain the luminous mortar.
The construction process of the luminous mortar of the stair channel is as follows:
firstly, after concrete pouring and vibrating of the stair are finished, 20mm multiplied by 20mm battens which have the same length as the stair sections and are coated with release agents are transversely placed on the stair steps, the edges of the battens are 20mm away from the edges of the stair steps, and the battens are slightly knocked by a rubber hammer to be embedded into the surfaces of the stair steps by 10mm, as shown in fig. 1.
And secondly, when the stair template starts to be dismantled, the battens on the steps are dismantled together, the side faces of the battens are slightly knocked by an iron hammer, the battens can be dismantled after the battens are loosened, a reserved groove with the cross section of 20mm multiplied by 10mm is obtained, and the dismantled battens are cleaned for next use.
And thirdly, after the wood beam is dismantled, cleaning the dust in the reserved groove by using a broom, and then cleaning the release agent in the reserved groove by using 10% hot-alkali water.
And fourthly, weighing a certain amount of mortar powder in a barrel, adding water, and then fully and uniformly stirring by using a handheld electric stirrer to obtain the luminous mortar.
Fifthly, a certain amount of luminous mortar is taken by a small shovel and placed in the reserved groove, and the luminous mortar is compacted and flattened by a small trowel, wherein the height of the luminous mortar is 2mm lower than the upper edge of the reserved groove. After 2 hours, the luminous mortar was calendered with a small trowel, as shown in FIG. 2.
The technical solution of the present invention is further described below with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
Example 1
The luminescent mortar comprises, by mass, 100 parts of white cement, 100 parts of quartz sand, 50 parts of long-afterglow luminescent powder, 0.5 part of nano titanium dioxide powder, 2 parts of polycarboxylic acid water reducing agent, 1 part of dispersing agent and 80 parts of water.
Example 2
The luminescent mortar comprises, by mass, 100 parts of white cement, 100 parts of quartz sand, 40 parts of long-afterglow luminescent powder, 0.5 part of nano titanium dioxide powder, 2 parts of polycarboxylic acid water reducing agent, 1 part of dispersant and 75 parts of water.
Example 3
The luminescent mortar comprises, by mass, 100 parts of white cement, 100 parts of quartz sand, 30 parts of long-afterglow luminescent powder, 0.5 part of nano titanium dioxide powder, 2 parts of polycarboxylic acid water reducing agent, 1 part of dispersing agent and 70 parts of water.
The light-emitting mortar prepared in the embodiments 1 to 3 is used for stair channel construction, the light-emitting brightness and the light-emitting time of the light-emitting mortar are tested at night, and the compressive strength and the flexural strength are simultaneously tested, and the results are shown in the following table 1:
TABLE 1
| Serial number | Test items | Example 1 | Example 2 | Example 3 |
| 1 | Initial light emission luminance (mcd/m)2) | 1430 | 1150 | 840 |
| 2 | Luminous brightness after 10min (mcd/m)2) | 160 | 130 | 95 |
| 3 | Luminous brightness after 60min (mcd/m)2) | 18 | 15 | 8 |
| 4 | Luminous brightness after 4h (mcd/m)2) | 5.5 | 4.5 | 3.2 |
| 5 | Luminous time (h) | 6.8 | 6.5 | 6.2 |
| 6 | 7 day compressive strength (MPa) | 12 | 15 | 20 |
| 7 | 7 days rupture strength (MPa) | 3.2 | 4 | 5.5 |
As can be seen from the above table, the luminescent mortar prepared by the embodiment of the invention has high luminescent brightness, and the luminescent brightness after 4 hours can reach 3mcd/m2～6mcd/m2And the luminous time is as long as 6 hours, and the light-emitting diode has good compressive strength and flexural strength, and meets the construction requirements of stair channels.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The luminous mortar is characterized by comprising cement-based powder, long-afterglow luminous powder, titanium dioxide and water.
2. The luminescent mortar of claim 1, wherein the long persistence phosphor is a silica surface-coated silicate phosphor, and the silicate phosphor is Eu2+And Dy3+Co-doped barium silicate.
3. The luminescent mortar of claim 2, wherein Eu is the silicate phosphor2+The molar concentration of the active component is 0.003 to 0.008 percent, and Dy3+The molar concentration of the organic acid is 0.005 to 0.01 percent.
4. The method of claim 2Luminescent mortar, characterized in that the Eu is2+And Dy3+The preparation process of the co-doped barium silicate comprises the following steps:
using tetraethoxysilane and Eu (NO)3)3Solution, Dy (NO)3)3Solution, Ba (NO)3)2Preparing precursor gel by using the solution and the fluxing agent;
drying the precursor gel to obtain a precursor xerogel;
calcining the precursor xerogel in a reducing atmosphere to obtain Eu2+And Dy3+Co-doped barium silicate.
5. The luminescent mortar of claim 4, wherein ethyl orthosilicate, Eu (NO) is used3)3Solution, Dy (NO)3)3Solution, Ba (NO)3)2Solution and fluxing agent, and the step of preparing precursor gel comprises the following steps:
preparation of Dy (NO) separately3)3Solution, Ba (NO)3)2Solution, Eu (NO)3)3A solution;
mixing tetraethoxysilane and Ba (NO)3)2Solution, said Eu (NO)3)3Solution of Dy (NO)3)3And a fluxing agent to obtain a mixed solution;
and heating the mixed solution in a water bath and stirring to hydrolyze the tetraethoxysilane to obtain precursor gel.
6. The luminescent mortar according to claim 4, wherein in the step of "calcining the precursor xerogel", the calcination temperature of the precursor xerogel is 1200 ℃ to 1400 ℃ and the calcination time is 4 hours to 5 hours.
7. The luminescent mortar of claim 2, wherein the silica surface coating process of the silicate luminescent powder is as follows:
dispersing silica sol in water to obtain a dispersion solution;
under the heating condition, adding silicate luminescent powder into the dispersion solution and stirring to obtain a precipitation solution;
and carrying out solid-liquid separation on the precipitation solution, and drying to obtain the silicate luminescent powder coated on the surface of the silicon dioxide.
8. The luminescent mortar of claim 7, wherein the mass ratio of the silicate luminescent powder to the silica sol is (8-12): 1.
9. The luminescent mortar of any one of claims 1 to 8, wherein the cement-based powder comprises white cement, quartz sand, a dispersant and a polycarboxylic acid water reducer.
10. The method for preparing the luminescent mortar of claim 9, comprising the steps of:
mixing titanium dioxide, long-afterglow luminescent powder, a polycarboxylate superplasticizer and a dispersant to obtain a mixture, and adding white cement and quartz sand into the mixture to obtain mortar powder; and adding water into the mortar powder and uniformly mixing to obtain the luminous mortar.
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