CN1289612C - Method for preparing ultra hydrophilic coat of titanium dioxide by using titanium trichloride as precursor - Google Patents
Method for preparing ultra hydrophilic coat of titanium dioxide by using titanium trichloride as precursor Download PDFInfo
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- CN1289612C CN1289612C CN 200510024941 CN200510024941A CN1289612C CN 1289612 C CN1289612 C CN 1289612C CN 200510024941 CN200510024941 CN 200510024941 CN 200510024941 A CN200510024941 A CN 200510024941A CN 1289612 C CN1289612 C CN 1289612C
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Abstract
The present invention relates to a preparation method for a titanium dioxide ultra hydrophilic coating layer using titanium trichloride as a precursor. Firstly, the titanium trichloride is used as the precursor to prepare titanium dioxide hydrocolloid with certain concentration; metallic copper, stainless steel or a glass surface is used as a carrier; an immersion method or a brushing method is used for coating the titanium dioxide hydrocolloid at the surface of the carrier; the titanium dioxide hydrocolloid is dried by appropriate temperature and irradiated by ultraviolet light, and a powder colloid plating layer with an ultra hydrophilic characteristic is formed at the surface of the carrier. The method of the present invention has the advantages of short processing time and high photocatalytic activity; the titanium dioxide coating layer generated by the present invention has the advantages of large capacity and firm combination; after the surface of the carrier is processed, the surface of the coating layer can generate a strong and stable ultra hydrophilic characteristic by being configured with an appropriate ultraviolet light source.
Description
Technical field
The present invention relates to a kind of preparation method of ultra hydrophilic coat of titanium dioxide, by preparing a kind of is the super hydrophilic colloid of titanium dioxide of presoma with the titanous chloride, and it is coated in carrier surface and carries out subsequent disposal, make carrier surface have stable super water-wet behavior with coating of titanium dioxide.Belong to chemical field.
Background technology
Titanium dioxide is as a kind of photocatalyst, in recent years because its unique characteristic begins to cause people's attention.Titanium dioxide can utilize different materials such as its strong oxidation capacity resolving harmful gas molecule, bacterium and virus under the UV-irradiation condition, they are transformed into innoxious substances such as water and carbonic acid gas, does not have secondary pollution.This characteristic of titanium dioxide has been applied to aspects such as environmental purification, antibiotic, antipollution and deodorizing.
The another one key property of titanium dioxide is exactly super water-wet behavior.Under the condition of the surface with coating of titanium dioxide at ultraviolet radiation, the contact angle of coatingsurface water can reduce along with the prolongation of time, at last near zero degree.So when the glass with coating of titanium dioxide contacted with current, the water droplet of coatingsurface can form very thin liquid film, make glass become very transparent.In addition, coating of titanium dioxide is more much bigger with the avidity of oil than it with the avidity of water, so it can remove oily matter automatically, and the automatically cleaning effect of Here it is coating of titanium dioxide.Because this characteristic, coating of titanium dioxide has great practical value in fields such as antifog glass and automatically cleaning materials.Coating of titanium dioxide is applied to aspects such as vehicle glass, material of construction, just can reaches the function that realizes self-cleaning by rainwater.
In the energy source and power field, if be that all kinds of interchanger of heat exchange working medium adopt coating of titanium dioxide with water, the super water-wet behavior that utilizes coating of titanium dioxide is enhanced heat exchange device performance effectively, save energy.
In recent years, utilize the technology of super water-wet behavior of coating of titanium dioxide very fast in practical application area development, the preparation method of carrier surface coating of titanium dioxide has also had greatly and has improved.But the traditional preparation process method major part of coating of titanium dioxide all is to form titanium deoxid film by chemical reaction on carrier, and technology is very complicated, and the coating of titanium dioxide charge capacity of carrier surface is little, thereby causes photocatalytic activity not high.In addition, the volume of carrier and surface-area are all smaller.
Summary of the invention
The object of the invention is the above-mentioned deficiency at prior art, providing a kind of is the method for preparing ultra hydrophilic coat of titanium dioxide of presoma with the titanous chloride, simple and effective, can make carrier surface have super water-wet behavior directly with containing the hydro-colloid dipping of titanium dioxide powder or brushing at carrier surface with coating of titanium dioxide.
For realizing such purpose, the present invention at first is presoma with the titanous chloride, prepare certain density titanium dioxide hydro-colloid, and be carrier with the surface of metallic copper, stainless steel and glass, adopt pickling process or squeegee process that the titanium dioxide hydro-colloid is coated in carrier surface, through suitable temperature oven dry and UV-irradiation, form powder colloid coating at carrier surface again with super water-wet behavior.
Method of the present invention comprises following concrete steps:
1, preparation titanium dioxide hydro-colloid: with the titanous chloride is presoma, and ammonia soln is joined in the Titanium Trichloride Solution, generates black precipitate, with sedimentation and filtration, is placed under the room temperature dry after the washing.Get above-mentioned black precipitate, ratio according to corresponding 14～16 milliliters of 1g precipitation adds superoxol, add distilled water in the reaction process, and constantly stir, when reaction finished, solution was transparent brown-red solution, added the concentration that suitable water is adjusted colloidal sol again, the concentration of final titanium dioxide hydro-colloid is 0.1～0.5mol/L, displays stand-by.
2, carrier surface pre-treatment: before coating, carrier surface must clean earlier and drying treatment.With abrasive paper for metallograph carrier surface being polished earlier, is that 5% hydrochloric acid, acetone and pure water clean with concentration then successively, is placed in the air then and dries.
Carrier surface can be copper metallic face, stainless steel surface and glass surface.
3, carry out coating at carrier surface: carry out adopting pickling process or squeegee process in the coating procedure at carrier surface, adopt pickling process for small-sized carrier surface, large-scale carrier surface adopts squeegee process.The above-mentioned titanium dioxide hydro-colloid that makes is brushed to above-mentioned drying support surface, perhaps carrier is soaked in the titanium dioxide hydro-colloid and slowly take out then, allow the carrier coating Surface Vertical place, be placed in the air and dry naturally.
4, after the carrier with hydro-colloid coating after will drying heated 1 hour under 150 ℃ infrared lamp, hydro-colloid formed the coating of translucent thickness about 1 μ m, is placed on wavelength then less than carrying out radiation under the UV-light of 380nm about 2 hours.At this time the copper metallic face with coating of titanium dioxide just has super water-wet behavior.
The carrier for preparing the hydro-colloid coating is placed preservation in the dark.
Compare with in the past preparation method, the present invention has outstanding feature and substantive progressive.The coating of titanium dioxide charge capacity that generates through the present invention is big, combination is firm.Carrier surface is through after handling, and by disposing suitable ultraviolet source, coatingsurface can produce strong and stable super water-wet behavior, and contact angle can be lower than 5 ° from being reduced to 40 ° to 70 ° of original general surface.In addition, the method treatment time of the present invention is short, the photocatalytic activity height.
Embodiment
Below in conjunction with embodiment technical scheme of the present invention is further described.
Embodiment 1:
With the titanous chloride is the preparation of the colloidal sol of presoma: add the ammoniacal liquor of 10ml in the 20ml Titanium Trichloride Solution, generate black precipitate, with sedimentation and filtration, be placed under the room temperature dry after the washing.Get above-mentioned black precipitate 1.25g, add the 20ml superoxol, add 70ml distilled water in the reaction process, and constantly stir, when reaction finished, solution was transparent brown-red solution, and titanium dioxide concentration is 0.15mol/L in the final hydro-colloid, displays stand-by.
For small-sized copper metallic face, the surface is polished earlier with abrasive paper for metallograph, be that 5% hydrochloric acid, acetone and pure water clean with concentration successively then, be placed in the air again and dry.After the surface drying, soak among the hydro-colloid that makes in the aforesaid method, slowly take out then, when taking out, allow coatingsurface, in air, dry naturally then perpendicular to liquid level.
After the copper metal with hydro-colloid coating after will drying heated 1 hour under 150 ℃ infrared lamp, hydro-colloid formed the coating of translucent thickness about 1 μ m, was placed on wavelength then less than carrying out radiation under the UV-light of 380nm about 2 hours.At this time the copper metallic face with coating of titanium dioxide just has super water-wet behavior, and surface contact angle is lower than 5 °.
The carrier for preparing the hydro-colloid coating is placed preservation in the dark.
Embodiment 2:
With the titanous chloride is the preparation of the colloidal sol of presoma: add the ammoniacal liquor of 45ml in the 20ml Titanium Trichloride Solution, generate black precipitate, with sedimentation and filtration, be placed under the room temperature dry after the washing.Get above-mentioned black precipitate 4.2g, add the 60ml superoxol, add 50ml distilled water in the reaction process, and constantly stir, when reaction finished, solution was transparent brown-red solution, and titanium dioxide concentration is 0.5mol/L in the final hydro-colloid, displays stand-by.
For the large-size stainless steel surface, the surface is polished earlier with abrasive paper for metallograph, be that 5% hydrochloric acid, acetone and pure water clean with concentration successively then, be placed in the air again and dry.After the surface drying, be coated with and brush the hydro-colloid that makes in the aforesaid method, allow coatingsurface vertically place, in air, dry naturally then.
After heated 1 hour under 150 ℃ infrared lamp on the stainless steel metal surface with hydro-colloid coating after will drying, hydro-colloid forms the coating of translucent thickness about 1 μ m, is placed on wavelength then less than carrying out radiation under the UV-light of 380nm about 2 hours.At this time the stainless steel metal surface with coating of titanium dioxide just has super water-wet behavior.
The carrier for preparing the hydro-colloid coating is placed preservation in the dark.
Claims (3)
1, a kind of is the method for preparing ultra hydrophilic coat of titanium dioxide of presoma with the titanous chloride, it is characterized in that comprising the steps:
1) preparation titanium dioxide hydro-colloid: with the titanous chloride is presoma, ammonia soln is joined in the Titanium Trichloride Solution, generate black precipitate, with sedimentation and filtration, be placed under the room temperature dry after the washing, get above-mentioned black precipitate, ratio according to corresponding 14～16 milliliters of 1g precipitation adds superoxol, add distilled water in the reaction process, and constantly stir, after reaction finishes, in transparent brown-red solution, add the concentration that colloidal sol is adjusted in entry again, making the concentration of titanium dioxide hydro-colloid is 0.1～0.5mol/L, displays stand-by;
2) carrier surface pre-treatment: earlier carrier surface being polished, is that 5% hydrochloric acid, acetone and pure water clean with concentration then successively, is placed in the air then and dries;
3) carry out coating at carrier surface: the titanium dioxide hydro-colloid that makes is brushed to through pretreated drying support surface, perhaps will soak in the titanium dioxide hydro-colloid and slowly take out then through pretreated drying support, allow the carrier coating Surface Vertical place, be placed in the air and dry naturally;
4) carrier with titanium dioxide hydro-colloid coating after will drying heated 1 hour under 150 ℃ infrared lamp, was placed on wavelength then less than radiation under the UV-light of 380nm 2 hours, obtained having the coating of titanium dioxide of super water-wet behavior at carrier surface.
2, according to claim 1 be the method for preparing ultra hydrophilic coat of titanium dioxide of presoma with the titanous chloride, it is characterized in that described carrier surface is copper metallic face, stainless steel surface or glass surface.
3, according to claim 1 be the method for preparing ultra hydrophilic coat of titanium dioxide of presoma with the titanous chloride, it is characterized in that when carrier surface carries out coating adopt pickling process for small-sized carrier surface, large-scale carrier surface adopts squeegee process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510024941 CN1289612C (en) | 2005-04-07 | 2005-04-07 | Method for preparing ultra hydrophilic coat of titanium dioxide by using titanium trichloride as precursor |
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| CN 200510024941 CN1289612C (en) | 2005-04-07 | 2005-04-07 | Method for preparing ultra hydrophilic coat of titanium dioxide by using titanium trichloride as precursor |
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| CN1289612C true CN1289612C (en) | 2006-12-13 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100389879C (en) * | 2006-04-20 | 2008-05-28 | 复旦大学 | Synthesis method of nanometer crystal mesopore titanium dioxide photocatalyst |
| CN100999624B (en) * | 2007-01-05 | 2010-05-19 | 福州大学 | Compounding of inorganic anti-pollution coating for high pressure insulator surface and preparation process thereof |
| CN102600880B (en) * | 2012-01-29 | 2014-01-15 | 北京科技大学 | Preparation method of visible light-response titanium dioxide photocatalytic liquid |
| CN103643275B (en) * | 2013-12-16 | 2016-01-06 | 电子科技大学 | A kind of method preparing titanium oxide ceramics coating at lead alloy surface |
| CN104941885B (en) * | 2015-05-28 | 2017-08-08 | 北京天恒盛通科技发展有限公司 | A kind of technique for carrying out electrostatic spraying in non-conductor substrate |
| CN107694551B (en) * | 2017-11-10 | 2020-06-30 | 伦慧东 | Preparation process of inorganic microsphere particles with uniformly positioned titanium dioxide on surface |
| CN108455666A (en) * | 2018-05-08 | 2018-08-28 | 浙江大学台州研究院 | The hydrophilic TiO of black with photo-thermal effect2Preparation method |
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Application publication date: 20051026 Assignee: Guangdong Xinkeda Industrial Co., Ltd. Assignor: Shanghai Jiao Tong University Contract record no.: 2010440000298 Denomination of invention: Method for preparing ultra hydrophilic coat of titanium dioxide by using titanium trichloride as precursor Granted publication date: 20061213 License type: Exclusive License Record date: 20100330 |
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