CN101418151A - Nano meso-porous titanium dioxide coating having high efficiency antibacterial and air purification function - Google Patents
Nano meso-porous titanium dioxide coating having high efficiency antibacterial and air purification function Download PDFInfo
- Publication number
- CN101418151A CN101418151A CN200810243724.3A CN200810243724A CN101418151A CN 101418151 A CN101418151 A CN 101418151A CN 200810243724 A CN200810243724 A CN 200810243724A CN 101418151 A CN101418151 A CN 101418151A
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- Prior art keywords
- titanium dioxide
- porous titanium
- nano meso
- nano
- meso
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- 238000004887 air purification Methods 0.000 title abstract 3
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- -1 bipyridyl ruthenium Chemical compound 0.000 claims description 38
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- 238000002360 preparation method Methods 0.000 abstract description 21
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- 239000010452 phosphate Substances 0.000 description 1
- PTMHPRAIXMAOOB-UHFFFAOYSA-N phosphoramidic acid Chemical class NP(O)(O)=O PTMHPRAIXMAOOB-UHFFFAOYSA-N 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 238000001782 photodegradation Methods 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009790 rate-determining step (RDS) Methods 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
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- 229950011008 tetrachloroethylene Drugs 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
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Abstract
The invention discloses a mesoporous nano titania coating with the functions of high-efficiency antibacterium and air purification. The compositions of the coating in percentage by weight are 1 to 10 percent of mesoporous nano titania, 20 to 60 percent of solvent, 20 to 55 percent of film-forming resin, 0.02 to 10 percent of dispersant and other auxiliary agent, and 10 to 30 percent of inorganic pigment filler. The coating takes the mesoporous nano titania or a modifier of the mesoporous nano titania as an active ingredient, has the functions of high-efficiency antibacterium and air purification after curing and film forming, can be widely applied to an internal wall and an external wall of a building. The mesoporous nano titania coating has simple preparation method and wide pollutant purification scope, has an eradicative rate of more than 85 percent on Escherichia coli, Staphylococcus aureus and Candida albicans within 1 hour, has a degradation rate of more than 90 percent on formaldehyde, benzene and toluene, can be excited to generate photocatalysis by faint ultraviolet light in sunlight or illumination light, and still has obvious effect on degradation of low-concentration pollutant.
Description
Technical field
The present invention relates to coating technology, be specifically related to a kind of nano meso-porous titanium dioxide coating with high-efficiency antimicrobial and air-cleaning function.
Background technology
Microorganisms such as bacterium are present in the various occasions around us.Along with the fast development of modern industry, environmental problem is on the rise.People's environmental consciousness improves gradually, and is urgent further to the demand of functional environment-friendly coating.Traditional fungicidal paint is to add sterilant in coating, as organism such as substituted arene class, heterogeneous ring compound, aminated compounds and organometallic compounds.But such material has toxicity in various degree, and self causes certain pollution to environment, and its security is worth discussion.Chinese patent CN1454944A adopts a kind of nano titanium dioxide photocatalyst of special preparation to replace traditional sterilant.This coating can not only play the effect of sterilization and disinfection under UV-irradiation, volatile organic compoundses such as formaldehyde, acetaldehyde, thiomethyl alcohol can also be decomposed to eliminate.In gas-phase photocatalysis, the lower concentration volatile organic content is the rate determining step of overall optical catalytic oxidation process in the absorption of catalyst surface, and a little less than the adsorption of this coating to volatile organic content, limited the efficient of its photocatalytic degradation volatile organic content.
Summary of the invention
The purpose of this invention is to provide a kind of nano meso-porous titanium dioxide coating with high-efficiency antimicrobial and air-cleaning function.
The objective of the invention is to be achieved through the following technical solutions: a kind of nano meso-porous titanium dioxide coating (each composition weight sum of nano meso-porous titanium dioxide coating of the present invention is 100%) with high-efficiency antimicrobial and air-cleaning function, its essentially consist comprises following component by weight percentage:
Nano meso-porous titanium dioxide 1~10%
Solvent 20~60%
Film-forming resin 20~55%
Dispersion agent and other auxiliary agent 0.02~10%
Inorganic color stuffing 10~30%
Optimum ratio consists of:
Nano meso-porous titanium dioxide 5~10%
Solvent 40~50%
Film-forming resin 30~40%
Dispersion agent and other auxiliary agent 1~5%
Inorganic color stuffing 14~20%
In the technique scheme, the preparation method of nano meso-porous titanium dioxide is according to Chinese patent CN 101139109, with the alkali metal titanate is raw material, in temperature is after 20~250 ℃, humidity are to react 0.5~72h in 2~100% the moisture atmosphere, water or acid solution clean, last air roasting or solvent heat treatment, obtaining particle diameter is 0.11~10 μ m, specific surface area〉30m
2/ g.Mesoporous pore size distribution range is 1~500nm, the nano meso-porous titanium dioxide of particulate state that its most probable aperture is 1~20nm or whisker shape or both mixtures.
Described nano meso-porous titanium dioxide can be the modified Nano mesoporous TiO 2.Described modified Nano mesoporous TiO 2 can be Erbium-doped the mixed nano meso-porous titanium dioxide of transition metal ion, the nano meso-porous titanium dioxide that has supported precious metal, compound nano meso-porous titanium dioxide after semi-conductive nano meso-porous titanium dioxide, the photosensitization.
Described nano meso-porous titanium dioxide is particulate state, whisker shape or is both mixture that its crystal formation is sharp titanium structure, rutile structure or their mixture.
The mixed nano meso-porous titanium dioxide of transition metal ion of described Erbium-doped, its transition metal ion is one or more in V, Fe, Cu, Co, Ni, Cr, Mo, Ru, W, the Re ion, the preparation method is: nano meso-porous titanium dioxide is immersed in 0.1h~10h in the transition metal ion solution of 0.01mol/l~1mol/l, add q.s 0.01mol/l~1mol/lNaOH aqueous solution and make metal ion change metal hydroxides into, filter the back at 80~500 ℃ of following roasting 0.5~10h;
The described nano meso-porous titanium dioxide that supports precious metal, its precious metal is one or more among Pt, Ag, Ir, Au, Pd, the Rh, the preparation method is: the sodium hydroxide ethylene glycol solution of 0.01mol/l~1mol/l is added drop-wise in the alcoholic solution of precious metal salt of a certain amount of intensively stirred 0.001~1mol/l, be heated to 100~300 ℃ under the nitrogen protection, constant temperature 0.5~5h, add nano meso-porous titanium dioxide after cooling and stir 4h, the ethylene glycol solution that adds hydrochloric acid, between adjust pH to 2~4, stir the above after-filtration washing of 5h, dry more than 100 ℃;
Described compound semi-conductive nano meso-porous titanium dioxide, its semi-conductor is WO
3, SnO
2, V
2O
5, ZnS, CdS, Cd
3P
2, MoO
3, SiO
2In one or more, its preparation method is as follows: a certain amount of Nano semiconductor is joined in the aqueous suspension solution of nano meso-porous titanium dioxide and stir 0.5h~10h, filter back dry 3h more than 80 ℃, 100~500 ℃ of roasting 1~5h;
Nano meso-porous titanium dioxide after the described photosensitization, its photosensitizer is the muriate of Ru, Pd, Pt, Rh, Au or CHLOROPHYLLINE, bipyridyl ruthenium, eosin, phthalocyanine, tetrazaporphin, in rose-red one or more, the preparation method is as follows: nano meso-porous titanium dioxide is added in the sensitizing agent ethanolic soln that concentration is 0.001~1mol/l, stir 0.5~10h, filter back 80 ℃ of dry 5h;
Described solvent is a molecular weight less than at least a or multiple mixture in 300 alcohols, ester class, ketone, aromatic hydrocarbon, aliphatic hydrocarbon, the replacement varsol, wherein said molecular weight is in methyl alcohol, ethanol, ethylene glycol, Virahol, propyl carbinol, the trimethyl carbinol one or more less than 300 alcohols, and esters solvent is vinyl acetic monomer, n-butyl acetate, isobutyl acetate, capryl acetate, acetic acid heptyl ester or n-Butyl lactate; Ketones solvent is acetone, methylethylketone, mibk, pimelinketone, dipropyl ketone ester, metacetone or methyl propyl ketone; Aromatic hydrocarbon solvent is benzene,toluene,xylene, Three methyl Benzene, solvent naphtha, ethylbenzene or isopropyl benzene; Fat hydrocarbon solvent is No. 200 solvent oils, sherwood oil, butane, Skellysolve A, iso-pentane, isohexane, normal hexane, normal heptane, isoheptane, octane or octane-iso; The replacement varsol is trichloroethane, Ethylene Dichloride, trieline, tetrachloroethylene or 2-nitropropane;
Described film-forming resin is that alkyd cumulative resin, acrylic resin, chlorinated rubber resin, phenolic aldehyde aminoresin, Resins, epoxy, polychlorostyrene are joined one or more mixing in Vinylite, cellulosic resin, the natural and synthetic rubber.
Described dispersion agent is one or more in anionic, cationic, non-ionic type, amphoteric, electric neutrality type, the polymer; Wherein anionic dispersing agent is preferably sodium oleate, carboxylate salt, sulfuric acid, sulfonate; Cationic dispersing agent is preferably the polyamino amidophosphoric acid salt of oleyl amine acetate, alkyl quaternary ammonium salts, amino propylamine dioleate, quaternary amine, special modification; Non-ionic dispersing agent is preferably the affixture C of lipid acid oxyethane
17H
33COO (CH
2CH
2O) nH, polyethylene glycol type polyvalent alcohol and polyethylenimine derivates; The amphoteric dispersion agent is preferably the high molecular polymer of phosphate ester salt type; Electric neutrality type dispersion agent is preferably oily amino oleic acid ester; High-molecular type dispersing agent is preferably polyolefins, polyolefine salt, polycarboxylic acid, polycarboxylic acid salt, polyacrylic, polyacrylate, polyester, polyester salt, polyamide-based, polymeric amide salt, polyurethanes, urethane salt, polyethers, polysiloxane-based, polyoxyethylene, Malaysia acids, maleic anhydride class.
Described inorganic color stuffing is one or more mixtures in talcum powder, silicon-dioxide, lime carbonate, the titanium dioxide.
Nano meso-porous titanium dioxide coating of the present invention is fat-soluble coating, experimental results demonstrate the strong adhesion of fat-soluble coating to matrix, the strength of coating height, and this is that water soluble paint is incomparable.
The preparation method of coating of the present invention is:
In proportion nano meso-porous titanium dioxide and inorganic color stuffing being put into high speed dispersor disperseed 30~80 minutes with the rotating speed of 1000~2000rpm, taking out the back adds in the stirrer, under the stirring velocity of 100~500rpm, slowly add solvent, film-forming resin, dispersion agent and other auxiliary agent, continue to stir 60~100min, promptly obtain having the nano meso-porous titanium dioxide coating of high-efficiency antimicrobial and air-cleaning function.Each components contents is in this coating: nano meso-porous titanium dioxide 1~10%, solvent 20~60%, film-forming resin 20~55%, dispersion agent and other auxiliary agent 0.02~10%, inorganic color stuffing 10~30%.
Other auxiliary agent of the present invention can add film coalescence aid: phenylcarbinol, 12 carbon alcohol esters, glycol butyl ether, propylene glycol phenylate etc.; Defoamer: silicone emulsion, the fatty acid ester compounded thing of higher alcohols etc.; Thickening material: Natvosol, polyacrylic ester etc.; Or flow agent: other conventional auxiliary agents such as phenylbenzene polysiloxane, methyl phenyl silicone.
In the technique scheme, owing to contain nano meso-porous titanium dioxide in its component, after component absorbs UV-light, have the characteristic of common anatase titanium dioxide: electronics generation transition forms activating group---electron-hole pair at titanium dioxide surface.Electronics has reductibility, the hole has strong oxidizing property, can make airborne oxygen reduction make the water oxidation respectively, generate the high-energy hydroxyl radical free radical in titania surface, make harmful organisms such as various organism that coating surface is sticky with and bacterium be decomposed into carbonic acid gas and water, reach antibiotic and purpose that purify air.The more important thing is, because nano meso-porous titanium dioxide has unique meso-hole structure, make titanium oxide have bigger specific surface area, the duct of aperture and rule distributes uniformly.Bigger specific surface area can make more organism be adsorbed on the mesoporous TiO 2 surface, add the existence of mesopore orbit structure, the surface of the easier arrival nano meso-porous titanium dioxide in electronics and hole participates in surface chemical reaction, makes it embody superior performance in organic photochemical catalytic oxidation and antibiosis.
Nano meso-porous titanium dioxide coating coat-thickness evaluation method: coat-thickness is measured with the JSM-6300 type sem observation of Japanese JEOL company, gets 5 mean values, and measuring error is at ± 1 μ m.
Provided by the invention have antibiotic and coating air-cleaning function and have the following advantages: one, purifying contaminated thing scope is wide, and the various organism in the indoor-outdoor air and bacterium, mould etc. are had stronger elimination effect; Two, implementation condition is simple, and the wavelength that all contains in sunlight or the houselights just can make nano meso-porous titanium dioxide excite less than the micro-UV-light of 380nm, produces the photochemical catalysis effect; Three, degraded low concentration pollutant effect is still remarkable.Nano meso-porous titanium dioxide has unique meso-hole structure, makes its ability with stronger adsorb organic compound, makes the organism of lower concentration can be adsorbed onto its surface participation light-catalyzed reaction fast, has the incomparable advantage of common nano titanium oxide.
Beneficial effect of the present invention:
This coating is active ingredient with nano meso-porous titanium dioxide or its modifier, has high-efficiency antimicrobial and air-cleaning function behind the film-forming, can be widely used in the inner, external wall of buildings.Preparation method for coating of the present invention is simple, purifying contaminated thing scope is wide, intestinal bacteria, streptococcus aureus and the Candida albicans eradicative rate in 1 hour is reached more than 85%, the degradation rate of PARA FORMALDEHYDE PRILLS(91,95), benzene and toluene reaches more than 90%, and can be by the faint ultraviolet excitation in sunlight or the houselights, produce photocatalysis, still remarkable to the degradation effect of low concentration pollutant.
Embodiment
Embodiment 1
Is that 100 ℃, humidity are in 50% the moisture atmosphere behind the reaction 1h with sodium titanate in temperature, and water cleans, last air roasting, and obtaining particle diameter is 1 μ m, specific surface area is 100m
2/ g, mesoporous aperture is the particulate state nano meso-porous titanium dioxide of 5nm.Get nano meso-porous titanium dioxide and inorganic color stuffing titanium dioxide in proportion and put into the rotating speed dispersion 50min of high speed dispersor with 1500rpm, taking out the back adds in the stirrer, under the stirring velocity of 300rpm, slowly add ethylene glycol, acrylic resin, sodium polyacrylate, phenylcarbinol, silicone emulsion, Natvosol, phenylbenzene polysiloxane, continue to stir 80min, promptly obtain the novel nano meso-porous titanium dioxide coating that the present invention has high-efficiency antimicrobial and air-cleaning function.
Each components contents is in this coating: (particle diameter 1 μ m, specific surface area is 100m to nano meso-porous titanium dioxide
2/ g, mesoporous aperture is 5nm) 1%, ethylene glycol 50%, acrylic resin 35%, sodium polyacrylate 0.1%, phenylcarbinol 1%, silicone emulsion 0.6%, Natvosol 1%, phenylbenzene polysiloxane 0.4%, titanium dioxide 10.9%.
Embodiment 2
Is that 100 ℃, humidity are in 95% the moisture atmosphere behind the reaction 5h with sodium titanate in temperature, and water cleans, and last air roasting obtains particle diameter 5 μ m, aperture 15nm, specific surface area 80m
2The whisker shape nano meso-porous titanium dioxide of/g.Nano meso-porous titanium dioxide 1g is immersed in the iron nitrate solution of 5ml0.1mol/l behind the 5h, add 20ml 0.1mol/l NaOH aqueous solution dipping 1h again and make metal ion change metal hydroxides into, filter the back at 300 ℃ of following roasting 2h obtained mixing nano meso-porous titanium dioxide of transition metal ion Fe.
The nano meso-porous titanium dioxide of the transition metal ion Fe that mixed and inorganic color stuffing talcum powder are put into high speed dispersor to be disperseed 80 minutes with the rotating speed of 2000rpm, taking out the back adds in the stirrer, under the stirring velocity of 300rpm, slowly add solvent vinyl acetic monomer, Resins, epoxy, sodium oleate, 12 carbon alcohol esters, the fatty acid ester compounded thing of higher alcohols, polyacrylic ester, methyl phenyl silicone, continue to stir 100min, promptly obtain the nano meso-porous titanium dioxide coating that the present invention has high-efficiency antimicrobial and air-cleaning function.
Each components contents is: the nano meso-porous titanium dioxide 5% of the transition metal ion Fe that mixed (particle diameter 6 μ m, aperture 15nm, specific surface area 80m
2/ g), vinyl acetic monomer 29%, Resins, epoxy 52%, sodium oleate 0.1%, ten two carbon alcohol ester 1%, the fatty acid ester compounded thing 0.6% of higher alcohols, polyacrylic ester 1%, methyl phenyl silicone 0.4%, talcum powder 10.9%.
Embodiment 3
The preparation process of coating is described according to embodiment 1 method.Each components contents is: Pt supports nano meso-porous titanium dioxide 10% (particle diameter 6 μ m, aperture 6nm, specific surface area 90m
2/ g), acetone 40%, acrylic resin 31.3%, oleyl amine acetate 0.1%, glycol butyl ether 1%, silicone emulsion 0.6%, Natvosol 1%, phenylbenzene polysiloxane 4%, silica 1 2%.
The preparation method that Pt supports nano meso-porous titanium dioxide is: the sodium hydroxide ethylene glycol solution of 10ml 0.1mol/l is added drop-wise in the ethylene glycol solution of Platinic chloride of intensively stirred 0.01mol/l of 5ml; be heated to 160 ℃ under the nitrogen protection; constant temperature 3h; add the nano meso-porous titanium dioxide 2g for preparing by embodiment 2 methods after cooling and stir 4h; the ethylene glycol solution that adds hydrochloric acid; between adjust pH to 2~4, stir the above after-filtration washing of 5h, 100 ℃ of dryings.
Embodiment 4
The preparation process of coating is described according to embodiment 1 method.Each components contents is: the nano meso-porous titanium dioxide 10% after the photosensitizer sensitization (particle diameter 6 μ m, aperture 12nm, specific surface area 120m
2/ g), toluene 42%, N-BUTYL ACETATE Mierocrystalline cellulose 34%, the affixture C of lipid acid oxyethane
17H
33COO (CH
2CH
2O) nH 0.1%, phenylcarbinol 1%, silicone emulsion 0.6%, Natvosol 1%, phenylbenzene polysiloxane 0.4%, talcum powder 10.9%.
Nano meso-porous titanium dioxide preparation method after the photosensitizer sensitization is as follows: is in the CHLOROPHYLLINE ethanolic soln of 0.1mol/l with 10g by the nano meso-porous titanium dioxide adding 30ml concentration that embodiment 2 methods prepare, and stirs 3h, filters back 80 ℃ of dry 5h.
Embodiment 5
The preparation process of coating is described according to embodiment 1 method.Each components contents is: compound semi-conductive nano meso-porous titanium dioxide (particle diameter 10 μ m, aperture 15nm, specific surface area 130m
2/ g) 6%, No. 200 solvent oil 40%, the mixture of natural rubber and acrylic resin (weight ratio 1:1) 35%; Ployphosphonate ester sodium 0.1%; Propylene glycol phenylate 1%; Silicone emulsion 0.6%; Natvosol 1%; Phenylbenzene polysiloxane 0.4%; Titanium dioxide and talcous mixture (weight ratio 1:1) 15.9%.
The preparation method of compound semi-conductive nano meso-porous titanium dioxide is as follows: the 1g nanometer ZnS is joined 100ml contain in the nano meso-porous titanium dioxide aqueous suspension solution that 20g prepares by embodiment 2 methods and stir 3h, after the filtration, 80 ℃ of dry 3h, 500 ℃ of roasting 1h.
Embodiment 6
Is that 200 ℃, humidity are in 80% the moisture atmosphere behind the reaction 2h with sodium trititanate in temperature, and water cleans, last air roasting, and obtaining particle diameter is 0.5 μ m, specific surface area is 120m
2/ g, mesoporous aperture is the nano meso-porous titanium dioxide of 6nm.
Nano meso-porous titanium dioxide 1g is immersed in 5h in the iron nitrate of 5ml 0.1mol/l and cupric nitrate (weight ratio 1:1) solution, after adding 20ml 0.1mol/l NaOH aqueous solution 1h, metal ion changes metal hydroxides into, filters the back at 300 ℃ of following roasting 2h obtained mixing nano meso-porous titanium dioxide of transition metal ion Fe and Cu.
The preparation process of coating is described according to embodiment 1 method.Each components contents is: the nano meso-porous titanium dioxide of mixed transition metal ion Fe and Cu (particle diameter 0.5 μ m, aperture 5nm, specific surface area 120m
2/ g) 8%; The mixture of capryl acetate and sherwood oil (weight ratio 1:1) 42%; Polychlorostyrene is joined Vinylite 36%; Amino oleic acid ester of oil and sodium oleate 0.1%; 12 carbon alcohol esters 1%; The fatty acid ester compounded thing 0.6% of higher alcohols; Polyacrylic ester 1%; Methyl phenyl silicone 0.4%; Lime carbonate 10.9%.
Embodiment 7
The preparation process of nano meso-porous titanium dioxide and coating is described according to embodiment 6 methods.Each components contents is: Pt and Au support nano meso-porous titanium dioxide (particle diameter 0.8 μ m, aperture 5nm, specific surface area 120m
2/ g) 8%; The mixture of trichloroethane and benzene (weight ratio 1:1) 27%; The mixture of phenolic aldehyde aminoresin and Resins, epoxy (weight ratio 1:1) 36%; The amino oleic acid ester 0.1% of oil; 12 carbon alcohol esters 1%; The fatty acid ester compounded thing 0.6% of higher alcohols; Polyacrylic ester 1%; Methyl phenyl silicone 0.4%; Silicon-dioxide 25.9%.
Pt and Au precious metal mix the preparation method who supports nano meso-porous titanium dioxide: the sodium hydroxide ethylene glycol solution of 10ml 0.1mol/l is added drop-wise in the ethylene glycol solution of the Platinic chloride of intensively stirred 0.01mol/l of 5ml and hydrochloro-auric acid; be heated to 160 ℃ under the nitrogen protection; constant temperature 3h; add the nano meso-porous titanium dioxide for preparing by embodiment 6 methods after cooling and stir 4h; the ethylene glycol solution that adds hydrochloric acid; adjust pH to 3 stirs the above after-filtration washing of 5h, 100 ℃ of dryings.
Embodiment 8
The preparation process of nano meso-porous titanium dioxide and coating is described according to embodiment 6 methods.Each components contents is: compound semi-conductive nano meso-porous titanium dioxide (particle diameter 1 μ m, mesoporous aperture 5nm, specific surface area 100m
2/ g) 8%; The mixture of acetone and normal hexane (weight ratio 1:1) 37%; Phenolic aldehyde aminoresin 31%; The amino oleic acid ester 0.1% of oil; 12 carbon alcohol esters 1%; The fatty acid ester compounded thing 0.6% of higher alcohols; Polyacrylic ester 1%; Methyl phenyl silicone 0.4%; Silicon-dioxide 20.9%.
The preparation method of compound semi-conductive nano meso-porous titanium dioxide is as follows: with the 1g nano SnO
2With nanometer SiO
2(weight ratio 1:1) joins 100ml and contains in the aqueous suspension solution of the nano meso-porous titanium dioxide that 20g prepares by embodiment 1 method and stir 3h, filters back dry 3h more than 80 ℃, 500 ℃ of roasting 1h.
Comparative example 1
Replace nano meso-porous titanium dioxide with the commercial catalysts P-25 that generally acknowledges in the present photocatalysis field in the comparative example, its preparation process is according to described in the embodiment 1.Concrete prescription is by following weight ratio: P-25 titanium oxide (German Degussa company) 10%, No. 200 solvent oils 42%, acrylic resin 34%, sodium polyacrylate 0.1%, glycol butyl ether 1%, the fatty acid ester compounded thing 0.6% of higher alcohols, polyacrylic ester 1%, phenylbenzene polysiloxane 0.4%, titanium dioxide 10.9%.
Comparative example 2
Method according to embodiment 1 among the Chinese patent CN1454944A prepares latex outer wall paint.Concrete steps and each component concentration are seen this patent.
The anti-microbial property evaluation method: nano meso-porous titanium dioxide coating antibacterial ability detection method is with reference to country " sterilized product is identified and inspection specifications ", and experimental strain is intestinal bacteria, streptococcus aureus and Candida albicans.Coating is tested behind 100W houselights irradiation 1h.
Photocatalytic activity evaluation method: on the aluminium flake of 20cm * 20cm, apply sample, coat-thickness is controlled at about 12 μ m, put into the airtight photo catalysis reactor of one 40cm * 40cm * 40cm, and in reactor, inject a certain amount of organic pollutant, after treating all gasifications, with commercially available 20W ultraviolet lamp (predominant wavelength 365nm) irradiation 1h.The concentration of pollutent SP-6890 gas-chromatography (Shandong Lunan Ruihong Chemical Instrument Co., Ltd.) assay determination in the air.Pollutent is: formaldehyde, benzene, toluene, concentration is controlled at about 0.2mg/l before the reaction.Photocatalytic activity is weighed with the organic efficient of nano meso-porous titanium dioxide coating photodegradation.Photocatalysis efficiency (1) as follows calculates:
The concentration (1) of pollutent in the air before photocatalysis efficiency=(before the illumination in the air after the concentration-illumination of pollutent in the air concentration of pollutent)/illumination
The absorption property evaluation method: the aluminium flake that will scribble paint coatings is placed in the photo catalysis reactor, is injected with organic pollutants, and concentration is controlled at 0.2mg/l, and sampling detects behind the lucifuge 1h.Adsorption efficiency (2) as follows calculates:
The initial concentration (2) of pollutent in adsorption efficiency=(in the air initial concentration of pollutent-lucifuge after for some time in the air concentration of pollutent)/air
The photocatalysis performance test result of embodiment and comparative example is as follows:
The absorption property test result of embodiment and comparative example is as follows:
Claims (10)
1, a kind of nano meso-porous titanium dioxide coating with high-efficiency antimicrobial and air-cleaning function, it is characterized in that this coating is by weight percentage by nano meso-porous titanium dioxide 1~10%, solvent 20~60%, film-forming resin 20~55%, dispersion agent and other auxiliary agent 0.02~10%, inorganic color stuffing 10~30% is formed; Wherein, described nano meso-porous titanium dioxide particle diameter is 0.11~10 μ m, specific surface area〉30m
2/ g, mesoporous pore size distribution range is 1~500nm, its most probable aperture is 1~20nm.
2, nano meso-porous titanium dioxide coating as claimed in claim 1, it is characterized in that this coating by weight percentage by nano meso-porous titanium dioxide 5~10%, solvent 40~50%, film-forming resin 30~40%, dispersion agent and other auxiliary agent 1~5%, inorganic color stuffing 14~20% is formed; Wherein, described nano meso-porous titanium dioxide particle diameter is 0.11~10 μ m, specific surface area〉30m
2/ g, mesoporous pore size distribution range is 1~500nm, its most probable aperture is 1~20nm.
3, nano meso-porous titanium dioxide coating as claimed in claim 1 or 2 is characterized in that described nano meso-porous titanium dioxide is the modified Nano mesoporous TiO 2.
4, as claim 1,2 or 3 described nano meso-porous titanium dioxide coatings, it is characterized in that described nano meso-porous titanium dioxide is particulate state, whisker shape or is both mixture, its crystal formation is sharp titanium structure, rutile structure or their mixture.
5, nano meso-porous titanium dioxide coating as claimed in claim 3 is characterized in that described modified Nano mesoporous TiO 2 is mixed a nano meso-porous titanium dioxide after the nano meso-porous titanium dioxide of transition metal ion, the nano meso-porous titanium dioxide that has supported precious metal, compound semi-conductive nano meso-porous titanium dioxide or the photosensitization of Erbium-doped.
6, nano meso-porous titanium dioxide coating as claimed in claim 5, it is characterized in that the mixed nano meso-porous titanium dioxide of transition metal ion of described Erbium-doped, its transition metal ion is one or more in V, Fe, Cu, Co, Ni, Cr, Mo, Ru, W, the Re ion; The described nano meso-porous titanium dioxide that supports precious metal, its precious metal are one or more among Pt, Ag, Ir, Au, Pd, the Rh; Described compound semi-conductive nano meso-porous titanium dioxide, its semi-conductor is WO
3, SnO
2, V
2O
5, ZnS, CdS, Cd
3P
2, MoO
3, SiO
2In one or more; Nano meso-porous titanium dioxide after the described photosensitization, its photosensitizer be the muriate of Ru, Pd, Pt, Rh, Au or CHLOROPHYLLINE, bipyridyl ruthenium, eosin, phthalocyanine, tetrazaporphin, in rose-red one or more.
7, nano meso-porous titanium dioxide coating as claimed in claim 1 or 2 is characterized in that described solvent is a molecular weight less than one or more mixtures in 300 alcohols, ester class, ketone, aromatic hydrocarbon, aliphatic hydrocarbon, the replacement varsol.
8, nano meso-porous titanium dioxide coating as claimed in claim 1 or 2 is characterized in that described film-forming resin is that alkyd cumulative resin, phenolic aldehyde aminoresin, Resins, epoxy, acrylic resin, polychlorostyrene are joined one or more mixing in Vinylite, cellulosic resin, the natural and synthetic rubber.
9, nano meso-porous titanium dioxide coating as claimed in claim 1 or 2 is characterized in that described dispersion agent is one or more mixing in anionic, cationic, non-ionic type, amphoteric, electric neutrality type, the high-molecular type dispersing agent.
10, nano meso-porous titanium dioxide coating as claimed in claim 1 or 2 is characterized in that described inorganic color stuffing is one or more mixtures in talcum powder, silicon-dioxide, lime carbonate, the titanium dioxide.
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