CN102127348B - Preparation method of nanometer titanium dioxide photo catalytic air purifying coating - Google Patents
Preparation method of nanometer titanium dioxide photo catalytic air purifying coating Download PDFInfo
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- CN102127348B CN102127348B CN 201010624630 CN201010624630A CN102127348B CN 102127348 B CN102127348 B CN 102127348B CN 201010624630 CN201010624630 CN 201010624630 CN 201010624630 A CN201010624630 A CN 201010624630A CN 102127348 B CN102127348 B CN 102127348B
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Abstract
The invention discloses a preparation method of a nanometer titanium dioxide photo catalytic air purifying coating. The method comprises the following steps of: (1) mixing 30-70 percent by weight of organic solvent and the balance of purified water in a stainless steel or plastic container and fully stirring to obtain a uniformly mixed liquor; (2) slowly adding film forming resin in an amount of 1-50 percent by weight of the weight of a mixed solvent and fully stirring to obtain a uniformly mixed liquor; (3) adding a curing agent into the uniformly mixed liquor in an amount of 0.1-1.0 percentby weight of the weight of the mixed liquor and a nonionic surfactant in an amount of 0.1-1.0 percent by weight of the weight of the mixed liquor, and fully stirring to obtain a uniformly mixed liquor; and (4) adding anatase nanometer titanium dioxide lyosol with the volume being less than 10 nanometers, high photo catalytic activity and the nanometer titanium dioxide solid content of 10 percent in amount of 1-50 percent by weight of the weight of the mixed liquor prepared in the step (3), and fully stirring to obtain a uniformly mixed liquor, wherein all the steps are performed at normal temperature. The air purifying nanometer coating can be widely applied to the fields of sterilization, self-cleaning, air purification and the like.
Description
Technical field
The present invention relates to coating, be specifically related to a kind of nanometer titanium dioxide photo catalytic air purifying coating.
Background technology
Mostly existing air purifying coating is to reach the effect that purifies air by add anatase-type nanometer titanium dioxide in coating.Can produce OH-free radical and negative oxygen ion behind the anatase-type nanometer titanium dioxide absorb light energy.OH-free radical and negative oxygen ion have very strong redox ability, can decompose the pollutent in the oxidation air, thereby reach the purpose that purifies air.
But prior art can't solve the following anatase-type nanometer titanium dioxide lyosol of 10 nanometers and intermiscibility problem and the dispersion problem of nano-titania particle in coating system of coating system.I.e. flocculation was large particle diameter after the nano titanium oxide lyosol added in the coating system, and can precipitate, so existing nanometer titania coating often adds dispersion agent to make the nano-titania particle dispersion suspension.The following nano titanium oxide side of 10 nanometers has good photocatalysis performance, and after the nano-titania particle flocculation, the photocatalysis performance of nanometer titania coating just greatly reduces, even has not had.
Because can't resolve nano-titania particle at the dispersion problem of coating system, so be that directly to add aggregate particle size be tens in the existing production technology, even the nano titanium oxide of hundreds of nanometer, reach the dispersion of nano titanium oxide by strong stirring and the mode of adding dispersion agent, this coating system is suspension, poor stability.
Therefore, the photocatalysis performance of the nanometer titanium dioxide photo catalytic air purifying coating that prior art is produced is all very poor, and the effect that purifies air simultaneously is also very poor.
Summary of the invention
The object of the invention is to, a kind of preparation method of nanometer titanium dioxide photo catalytic air purifying coating is provided, the invention solves the intermiscibility problem of the following anatase-type nanometer titanium dioxide lyosol of insurmountable 10 nanometers in the past and coating system and nano-titania particle at the dispersion problem of coating system.
A kind of method for preparing nanometer titanium dioxide photo catalytic air purifying coating is provided, comprises the steps, the institute in steps all at normal temperatures, following per-cent all is weight percentage:
1), in stainless steel or plastic bottle organic solvent and water are mixed in proportion and are stirred well to even mixing, wherein organic solvent is 30-70%, adds pure water to 100%;
2), slowly add film-forming resin, press the 1-50% of mixed solvent, and be stirred well to even mixing;
3), in even mixed solution, add solidifying agent (such as mahogany acid etc., ratio is the 0.1-1.0% of mixed solution), nonionic surface active agent (such as sucrose ester, ratio is the 0.1-1.0% of mixed solution) is stirred to even mixing simultaneously;
4) (solid content of nano titanium oxide is 10% in the lyosol, to add the following anatase-type nanometer titanium dioxide lyosol with good light catalytic activity of 10 nanometers, the adding proportion of lyosol is step 3) in the 1-50% of the mixing liquid produced, and be stirred well to even mixing.
After adding nano titanium oxide in the conventional art, system can't become colloidal sol, but therefore suspension must add dispersion agent simultaneously, suspends to help nano-titania particle.The formed system of the present invention still is lyosol, can not add any wetting agent or dispersion agent, and system can be steady in a long-term, without precipitation.But also can add suitable wetting agent in order to increase the present invention to the wettability of ground.
Film the often easily efflorescence of nanometer titania coating after spraying, this is because nano titanium oxide has decomposed paint film, the system that the present invention selects has good stability, decomposition that can anti-nano titanium oxide, thus guaranteed the weather resistance of filming.
Long-acting: nano titanium oxide is a kind of photocatalyst, itself is not loss.Therefore the effectiveness that purifies air of the present invention is long-term.
The purification object is extensive: the nano titanium oxide that the present invention adds is below 10 nanometers, has very strong photocatalytic activity, the free radical (OH-) that its transition of electron produces is all very strong with the oxidation capacity of negative oxygen ion (O2-), most organic pollutant and part inorganic pollutants in the energy oxygenolysis air is such as formaldehyde, benzene, toluene, ammonia etc.
Tasteless, odorless: titanium dioxide is a kind of stable metal oxide, does not have smell, also can not discharge to be decomposed into gas or other materials, therefore can not cause human body uncomfortable.
Nontoxic: titanium dioxide is nontoxic, without harm, also can not cause other pollutions to human body.
Effect of the present invention:
The present invention has very strong air purification function, can degrade and organic pollutant and the part inorganic pollutant of eliminating the overwhelming majority in the air.And this effect is long-term.
The main component of this product is anatase-type nanometer titanium dioxide, solvent (water, Virahol or other organic solvents), film-forming resin (such as acrylic resin, Resins, epoxy etc.) and auxiliary agent (such as sulfuric acid acetate, polysorbate).
Embodiment
A kind of method for preparing nanometer titanium dioxide photo catalytic air purifying coating is provided, comprises the steps, the institute in steps all at normal temperatures, following per-cent all is weight percentage:
1) in stainless steel or plastic bottle organic solvent and water are mixed in proportion and are stirred well to even mixing, wherein organic solvent is 30-70%, adds pure water to 100%;
2) slowly add film-forming resin, by the 1-50% of mixed solvent and be stirred well to even mixing;
3) evenly adding solidifying agent in the mixed solution, such as mahogany acid etc., ratio is 0.1-1.0%, the nonionic surface active agent of mixed solution, and such as sucrose ester, ratio is that the 0.1-1.0% of mixed solution is stirred to even mixing simultaneously;
4) add the following anatase-type nanometer titanium dioxide lyosol with good light catalytic activity of 10 nanometers, the solid content of nano titanium oxide is 10% in the lyosol, and the adding proportion of lyosol is the 1-50% of the mixing liquid produced in the step 3 and is stirred well to even mixing.
In the above-mentioned method for preparing nanometer titanium dioxide photo catalytic air purifying coating, described organic solvent is Virahol.
In the above-mentioned method for preparing nanometer titanium dioxide photo catalytic air purifying coating, described film-forming resin is acrylic resin or Resins, epoxy.
Principle:
Added the following anatase-type nanometer titanium dioxide lyosol of 10 nanometers in the product of the present invention, after this nano titanium oxide absorb light energy, electronics in the valence band will be excited to conduction band, forms electronegative high reactivity electronics e-, produces simultaneously the hole h+ of positively charged in valence band.Under the effect of electric field, electronics separates with the hole, moves to the different positions of particle surface.Thermodynamic argument shows, the h+ that is distributed in the surface can change into (.OH) free radical with being adsorbed on TiO2 surface OH-and H2O molecular oxygen, and the oxidation capacity of .OH free radical is the strongest in the oxygenant that exists in the water body, the energy oxidation is also decomposed various organic pollutants (formaldehyde, benzene, TVOC etc.) and bacterium and part inorganic pollutant (ammonia, NOX etc.), and will finally be degraded to the innoxious substances such as CO2, H2O.Because .OH radical pair reactant is non-selectivity almost, thereby plays conclusive effect in photochemical catalysis.During simultaneously transition of electron also can with oxygen molecule (O
2) in conjunction with producing negative oxygen ion, negative oxygen ion also has very strong redox ability.In addition, many organic oxidizing potentials are more negative than the valence band current potential of TiO2, can directly be the oxidation of h+ institute.And the highly active e-side in TiO2 surface has very strong reducing power, can reduce and remove metal ion in the water body.Use above principle nano paint and be widely used in the fields such as sterilization, self-cleaning, purifying air.
Claims (1)
1. the preparation method of a nanometer titanium dioxide photo catalytic air purifying coating is characterized in that: comprise the steps, institute in steps all at normal temperatures, following per-cent all is weight percentage:
1), in stainless steel or plastic bottle the isopropyl alcohol and water is mixed in proportion and is stirred well to even mixing, wherein Virahol is 30-70%, adds pure water to 100%;
2), slowly add acrylic resin or Resins, epoxy, ratio is the 1-50% of mixed solvent, and is stirred well to even mixing;
3), evenly adding mahogany acid in the mixed solution, ratio is being the 0.1-1.0% of mixed solution, sucrose ester, and ratio is the 0.1-1.0% of mixed solution, is stirred to simultaneously even mixing;
4), add the following anatase-type nanometer titanium dioxide lyosol with good light catalytic activity of 10 nanometers, the solid content of nano titanium oxide is 10% in the lyosol, and the adding proportion of lyosol is step 3) in the mixing liquid produced 1-50% and be stirred well to even mixing.
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| CN 201010624630 CN102127348B (en) | 2010-12-31 | 2010-12-31 | Preparation method of nanometer titanium dioxide photo catalytic air purifying coating |
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| CN102127348B true CN102127348B (en) | 2013-04-24 |
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| CN102915815A (en) * | 2012-10-02 | 2013-02-06 | 张耀辰 | Porcelain insulator with super-hydrophilic antifouling self-cleaning function |
| KR101729884B1 (en) * | 2013-06-04 | 2017-04-24 | 파나소닉 아이피 매니지먼트 가부시키가이샤 | Cold-curing photocatalytic coating material, cold-curing coating composition and interior material |
| CN106010019A (en) * | 2016-08-01 | 2016-10-12 | 安庆瑞泰化工有限公司 | Air purifying water-based coating and preparation method thereof |
| CN110496649A (en) * | 2019-07-30 | 2019-11-26 | 久保清新材料科技(上海)有限公司 | A kind of preparation method of emulsion paint metope photoactivation coating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445312A (en) * | 2002-03-20 | 2003-10-01 | 中国科学技术大学 | Aqueous functional coatings possessing effects of self-cleaning, anti mold, sterilization and purifying air |
| CN101781506A (en) * | 2010-02-04 | 2010-07-21 | 复旦大学 | self-cleaning epoxy resin anti-fog coating |
| CN101781510A (en) * | 2010-02-03 | 2010-07-21 | 海洋王照明科技股份有限公司 | Bicomponent epoxy resin coating and preparation method thereof |
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| KR100989370B1 (en) * | 2010-08-06 | 2010-10-25 | (주)유원건축사사무소 | Method made of coated film type paint for on road and it's have fuction of air cleaning |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1445312A (en) * | 2002-03-20 | 2003-10-01 | 中国科学技术大学 | Aqueous functional coatings possessing effects of self-cleaning, anti mold, sterilization and purifying air |
| CN101781510A (en) * | 2010-02-03 | 2010-07-21 | 海洋王照明科技股份有限公司 | Bicomponent epoxy resin coating and preparation method thereof |
| CN101781506A (en) * | 2010-02-04 | 2010-07-21 | 复旦大学 | self-cleaning epoxy resin anti-fog coating |
Non-Patent Citations (1)
| Title |
|---|
| 夏宇正等.具有混晶结构纳米TiO2水溶胶的低温制备及光催化性能研究.《涂料工业》.2007,第37卷(第8期),第38-42页. * |
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