CN102127348A - 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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- CN102127348A CN102127348A CN 201010624630 CN201010624630A CN102127348A CN 102127348 A CN102127348 A CN 102127348A CN 201010624630 CN201010624630 CN 201010624630 CN 201010624630 A CN201010624630 A CN 201010624630A CN 102127348 A CN102127348 A CN 102127348A
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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 percent by 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 nano titanium dioxide photocatalysis 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, the airborne pollutent of energy decomposing oxidation, thus reach the purpose that purifies air.
But prior art can't solve the following anatase-type nanometer titanium dioxide lyosol of 10 nanometers and the intermiscibility problem and the dispersion problem of nano-titania particle in coating system of coating system.I.e. flocculation was big 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 photocatalytic, 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 the dispersion problem of nano-titania particle at coating system, so existing production technology is that directly to add aggregate particle size be tens, even the nano titanium oxide of hundreds of nanometer, reach dispersing nanometer titanium dioxide by brute force stirring and the mode of adding dispersion agent, this coating system is a suspension, poor stability.
Therefore, the photocatalysis performance of the nano titanium dioxide photocatalysis 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 objective of the invention is to, a kind of preparation method of nano titanium dioxide photocatalysis air purifying coating is provided, the invention solves the intermiscibility problem of following anatase-type nanometer titanium dioxide lyosol of insurmountable in the past 10 nanometers and coating system and nano-titania particle dispersion problem at coating system.
A kind of method for preparing the nano titanium dioxide photocatalysis air purifying coating is provided, comprises the steps, institute all carries out in steps at normal temperatures, and following ratio is weight ratio:
1) in stainless steel or plastic bottle organic solvent and water are mixed in proportion and are stirred well to uniform 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 uniform mixing;
3) add solidifying agent in uniform mixing liquid, as mahogany acid etc., ratio is 0.1-1.0%, the nonionic surface active agent of mixed solution, and as sucrose ester, ratio is the 0.1-1.0% of mixed solution, is stirred to uniform mixing simultaneously;
4) add the following anatase-type nanometer titanium dioxide lyosol of 10 nanometers with good light catalytic activity, the solid content of nano titanium oxide is 10% in the lyosol, the adding proportion of lyosol is the 1-50% of the mixing liquid produced in the step 3), and is stirred well to uniform 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 a lyosol, can not add any wetting agent or dispersion agent, and system can be steady in a long-term, do not have precipitation.But also can add suitable wetting agent to the wettability of ground in order to increase the present invention.
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 secular.
The purification object is extensive: the nano titanium oxide that the present invention adds has very strong photocatalytic activity below 10 nanometers, free radical (OH-) that its transition of electron produces and negative oxygen ion (O
2-) oxidation capacity all very strong, can oxygenolysis most organic pollutant and part inorganic pollutants in the air, as formaldehyde, benzene, toluene, ammonia etc.
Tasteless, nothing is smelt: 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 the human body discomfort.
Nontoxic: titanium dioxide is nontoxic, and human body is not had harm, also can not cause other pollutions.
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 secular.
The main component of this product is anatase-type nanometer titanium dioxide, solvent, and water, Virahol or other organic solvents, film-forming resin are as acrylic resin, Resins, epoxy etc. and auxiliary agent, as sulfuric acid acetate, polysorbate.
Embodiment
A kind of method for preparing the nano titanium dioxide photocatalysis air purifying coating is provided, comprises the steps, institute is (following ratio is weight ratio) in steps all at normal temperatures;
1) in stainless steel or plastic bottle organic solvent and water are mixed in proportion and are stirred well to uniform 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 uniform mixing;
3) add solidifying agent in uniform mixing liquid, as mahogany acid etc., ratio is 0.1-1.0%, the nonionic surface active agent of mixed solution, and as sucrose ester, ratio is the 0.1-1.0% of mixed solution, is stirred to uniform mixing simultaneously;
4) add the following anatase-type nanometer titanium dioxide lyosol of 10 nanometers with good light catalytic activity, the solid content of nano titanium oxide is 10% in the lyosol, the adding proportion of lyosol is the 1-50% of the mixing liquid produced in the step 3), and is stirred well to uniform mixing.
In the above-mentioned method for preparing the nano titanium dioxide photocatalysis air purifying coating, described organic solvent is a Virahol.
In the above-mentioned method for preparing the nano titanium dioxide photocatalysis 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, the electronics of valence band will be excited to conduction band, forms electronegative high reactivity electronics e-, produces the hole h+ of positively charged simultaneously on valence band.Under 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, can oxidation also decompose various organic pollutants (formaldehyde, benzene, TVOC etc.) and bacterium and part inorganic pollutant (ammonia, NOX etc.), and be innoxious substances such as CO2, H2O eventual degradation.Because .OH radical pair reactant non-selectivity almost, thus in photochemical catalysis decisive role.During transition of electron simultaneously 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 fields such as sterilization, self-cleaning, purifying air.
Claims (3)
1. a method for preparing the nano titanium dioxide photocatalysis air purifying coating is characterized in that, comprises the steps, institute all carries out in steps at normal temperatures, and following ratio is weight ratio:
1) in stainless steel or plastic bottle organic solvent and water are mixed in proportion and are stirred well to uniform mixing, wherein organic solvent is 30-70%, adds pure water to 100%;
2) slowly add film-forming resin, ratio is the 1-50% of mixed solvent, and is stirred well to uniform mixing;
3) add solidifying agent in uniform mixing liquid, ratio is 0.1-1.0%, the nonionic surface active agent of mixed solution, and ratio is the 0.1-1.0% of mixed solution, is stirred to uniform mixing simultaneously;
4) add the following anatase-type nanometer titanium dioxide lyosol of 10 nanometers with good light catalytic activity, the solid content of nano titanium oxide is 10% in the lyosol, the adding proportion of lyosol is the 1-50% of the mixing liquid produced in the step 3), and is stirred well to uniform mixing.
2. the method for preparing the nano titanium dioxide photocatalysis air purifying coating according to claim 1 is characterized in that described organic solvent is a Virahol.
3. the method for preparing the nano titanium dioxide photocatalysis air purifying coating according to claim 1 is characterized in that, described film-forming resin is acrylic resin or Resins, epoxy.
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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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| 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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| CN102127348A true CN102127348A (en) | 2011-07-20 |
| CN102127348B CN102127348B (en) | 2013-04-24 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915815A (en) * | 2012-10-02 | 2013-02-06 | 张耀辰 | Porcelain insulator with super-hydrophilic antifouling self-cleaning function |
| CN105229093A (en) * | 2013-06-04 | 2016-01-06 | 松下知识产权经营株式会社 | Normal temperature cured type light catalyzed coating, a ir-drying coatings 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 (4)
| 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 |
| 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 |
-
2010
- 2010-12-31 CN CN 201010624630 patent/CN102127348B/en active Active
Patent Citations (4)
| 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 |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 《涂料工业》 20070801 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 第38-42页 1-3 第37卷, 第8期 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102915815A (en) * | 2012-10-02 | 2013-02-06 | 张耀辰 | Porcelain insulator with super-hydrophilic antifouling self-cleaning function |
| CN105229093A (en) * | 2013-06-04 | 2016-01-06 | 松下知识产权经营株式会社 | Normal temperature cured type light catalyzed coating, a ir-drying coatings 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 |
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| Publication number | Publication date |
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| CN102127348B (en) | 2013-04-24 |
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Address after: 523000 No. 29 Dazhou Industrial North Road, Shangjia Community, Wanjiang Street, Dongguan City, Guangdong Province Patentee after: Guangdong Modern Coatings Technology Co., Ltd. Address before: 523000 Shangjia Community Industrial Zone, Wanjiang District, Dongguan City, Guangdong Province Patentee before: Dongguan Tomorrow Nano Science and Technology Co., Ltd. |