CN1687249A - Method for preparing ultra hydrophilic coat of titanium dioxide by using tetrabutyl titanatc as precursor - Google Patents
Method for preparing ultra hydrophilic coat of titanium dioxide by using tetrabutyl titanatc as precursor Download PDFInfo
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- CN1687249A CN1687249A CN 200510024943 CN200510024943A CN1687249A CN 1687249 A CN1687249 A CN 1687249A CN 200510024943 CN200510024943 CN 200510024943 CN 200510024943 A CN200510024943 A CN 200510024943A CN 1687249 A CN1687249 A CN 1687249A
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Abstract
The preparation method of tetanium dioxide super-hydrophilic coating using tetrabutyl titanate as precursor body includes the following steps: firstly, adding tetrabutyl titanate as precursor to ethyl alcohol solution, and adding diethanolamine, fully stirring them, adding water to regulate sol concentration to obtain tetrabutyl titanate sol; then preparing titanium dioxide aqueous solution, and adding it to the tetrabutyl titanate sol, fully stirring them to obtain titanium dioxide aqueous colloid; using surface of metal copper to stainless steel or glass as carrier, adopting impregnation method or brush coating method to apply the titanium dioxide aqueous colloid onto the surface of carrier, drying at proper temperature and irradiating by UV-light so as to form powder colloid coating layer with super-hydrophilic characteristics on the carrier surface.
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 tetrabutyl titanate, 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 tetrabutyl titanate, 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 tetrabutyl titanate, and preparation tetrabutyl titanate colloidal sol prepares the titanium dioxide aqueous solution then, and it is added fully stirring in the tetrabutyl titanate colloidal sol, obtains certain density titanium dioxide hydro-colloid; Surface with metallic copper, stainless steel or glass is a carrier, adopts pickling process or squeegee process that the titanium dioxide hydro-colloid is coated in carrier surface, through suitable temperature oven dry and UV-irradiation, forms the powder colloid coating with super water-wet behavior at carrier surface again.
Method of the present invention comprises following concrete steps:
1, preparation tetrabutyl titanate colloidal sol: with the tetrabutyl titanate is presoma, a certain amount of tetrabutyl titanate is added in the ethanol solution, dropwise add diethanolamine while stirring, the mol ratio of tetrabutyl titanate and diethanolamine is 0.5～1: 1, after fully stirring, dropwise add a certain amount of water more while stirring and adjust the concentration of colloidal sol, the volumetric molar concentration that obtains tetrabutyl titanate is the tetrabutyl titanate colloidal sol of 0.2～1mol/L.
2, preparation titanium dioxide hydro-colloid: titania powder is added in the distilled water, utilize ultrasonic wave to stir, make mass percent concentration and be 20% the titanium dioxide aqueous solution.Then this titanium dioxide aqueous solution is slowly added in the tetrabutyl titanate colloidal sol, fully stir, obtain containing the titanium dioxide hydro-colloid.Leave standstill its ageing of (sealing and standing) angel with hydro-colloid is airtight, stand-by.
3, 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.
4, 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.
5, 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 inventive method treatment time 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 tetrabutyl titanate is presoma, and the volumetric molar concentration of tetrabutyl titanate is 0.2mol/L in the precursor solution.The preparation process of colloidal sol is: the 34ml tetrabutyl titanate is joined in the ethanol solution of 55ml, dropwise add the 10ml diethanolamine while stirring, after fully stirring, dropwise add 2ml water more while stirring and make colloidal sol.
2 gram titania powders are joined in the distilled water of 66ml, utilize ultrasonic wave to stir, making mass percent concentration is the 20% titanium dioxide aqueous solution.Then this aqueous solution is slowly added in the above-mentioned colloidal sol, fully stir, obtain containing the hydro-colloid of titanium dioxide.With its ageing of this hydro-colloid sealing and standing one angel, 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.
The carrier for preparing the hydro-colloid coating is placed preservation in the dark.
Embodiment 2:
With the tetrabutyl titanate is presoma, and the volumetric molar concentration of tetrabutyl titanate is 0.6mol/L in the precursor solution.The preparation process of colloidal sol is: the 40ml tetrabutyl titanate is joined in the ethanol solution of 65ml, dropwise add the 12ml diethanolamine while stirring, after fully stirring, dropwise add 2.5ml water more while stirring and make colloidal sol.
2 gram titania powders are added in the distilled water of 66ml, utilize ultrasonic wave to stir, make mass percent concentration and be 20% the titanium dioxide aqueous solution.Then this aqueous solution is slowly added in the above-mentioned colloidal sol, fully stir, obtain containing the hydro-colloid of titanium dioxide.With its ageing of this hydro-colloid sealing and standing one angel, 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, the hydro-colloid that makes in the brushing aforesaid method allows coatingsurface vertically place, and dries naturally in air 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.
Embodiment 3:
With the tetrabutyl titanate is presoma, and the volumetric molar concentration of tetrabutyl titanate is 1mol/L in the precursor solution.The preparation process of colloidal sol is: the 30ml tetrabutyl titanate is joined in the ethanol solution of 48.5ml, dropwise add the 9ml diethanolamine while stirring, after fully stirring, dropwise add 2ml water more while stirring and make colloidal sol.
2 gram titania powders are added in the distilled water of 66ml, utilize ultrasonic wave to stir, make mass percent concentration and be 20% the titanium dioxide aqueous solution.Then this aqueous solution is slowly added in the colloidal sol, fully stir, obtain containing the hydro-colloid of titanium dioxide.With its ageing of this hydro-colloid sealing and standing one angel, stand-by.
For small-sized glass 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, soak among the hydro-colloid that aforesaid method makes, slowly take out then, when taking out, allow coatingsurface, in air, dry naturally then perpendicular to liquid level.
After the glass surface 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 glass 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 preparation method of the ultra hydrophilic coat of titanium dioxide of presoma with the tetrabutyl titanate, it is characterized in that comprising following concrete steps:
1) preparation tetrabutyl titanate colloidal sol: with the tetrabutyl titanate is presoma, tetrabutyl titanate is added in the ethanol solution, dropwise add diethanolamine while stirring, the mol ratio of tetrabutyl titanate and diethanolamine is 0.5～1: 1, after fully stirring, dropwise add entry more while stirring and adjust the concentration of colloidal sol, the volumetric molar concentration that obtains tetrabutyl titanate is the tetrabutyl titanate colloidal sol of 0.2～1mol/L;
2) preparation titanium dioxide hydro-colloid: titania powder is added in the distilled water, utilize ultrasonic wave to stir, make mass percent concentration and be 20% the titanium dioxide aqueous solution, then this titanium dioxide aqueous solution is slowly added in the tetrabutyl titanate colloidal sol, fully stir, obtain containing the titanium dioxide hydro-colloid, leave standstill its ageing of an angel with hydro-colloid is airtight, stand-by;
3) 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;
4) carry out coating at carrier surface: the titanium dioxide hydro-colloid that makes is brushed to through pretreated 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;
5) carrier with 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 tetrabutyl titanate, 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 tetrabutyl titanate, 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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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400606C (en) * | 2006-07-20 | 2008-07-09 | 厦门大学 | Method of preparing anatase type titanium dioxide dispersion at low temperature by hot-liquid method |
| RU2444550C2 (en) * | 2009-05-04 | 2012-03-10 | Государственное образовательное учреждение высшего профессионального образования "Челябинский государственный педагогический университет" ГОУ ВПО "ЧГПУ" | Method of producing titanium dioxide |
| CN102503163A (en) * | 2011-09-22 | 2012-06-20 | 中国航天科技集团公司第五研究院第五一0研究所 | Preparation method for titanium dioxide films with super-hydrophilic property under visible light |
| CN102114419B (en) * | 2009-12-30 | 2013-01-30 | 比亚迪股份有限公司 | Preparation method of photocatalysis and transmission increasing sol and glass coating material |
| CN106963651A (en) * | 2017-03-04 | 2017-07-21 | 宁波市北仑区人民医院 | A kind of Portable tablet dispenser |
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| CN109550401A (en) * | 2017-09-26 | 2019-04-02 | 重庆润泽医药有限公司 | A kind of membrane distillation composite material |
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2005
- 2005-04-07 CN CN 200510024943 patent/CN1284833C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400606C (en) * | 2006-07-20 | 2008-07-09 | 厦门大学 | Method of preparing anatase type titanium dioxide dispersion at low temperature by hot-liquid method |
| RU2444550C2 (en) * | 2009-05-04 | 2012-03-10 | Государственное образовательное учреждение высшего профессионального образования "Челябинский государственный педагогический университет" ГОУ ВПО "ЧГПУ" | Method of producing titanium dioxide |
| CN102114419B (en) * | 2009-12-30 | 2013-01-30 | 比亚迪股份有限公司 | Preparation method of photocatalysis and transmission increasing sol and glass coating material |
| CN102503163A (en) * | 2011-09-22 | 2012-06-20 | 中国航天科技集团公司第五研究院第五一0研究所 | Preparation method for titanium dioxide films with super-hydrophilic property under visible light |
| CN102503163B (en) * | 2011-09-22 | 2013-10-16 | 中国航天科技集团公司第五研究院第五一0研究所 | Preparation method for titanium dioxide films with super-hydrophilic property under visible light |
| CN106963651A (en) * | 2017-03-04 | 2017-07-21 | 宁波市北仑区人民医院 | A kind of Portable tablet dispenser |
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Assignee: Guangdong Chuangsheng Stainless Steel Products Co., Ltd. Assignor: Shanghai Jiao Tong University Contract fulfillment period: 2008.7.13 to 2013.7.12 contract change Contract record no.: 2009440001210 Denomination of invention: Method for preparing ultra hydrophilic coat of titanium dioxide by using tetrabutyl titanatc as precursor Granted publication date: 20061115 License type: Exclusive license Record date: 2009.8.14 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.7.13 TO 2013.7.12; CHANGE OF CONTRACT Name of requester: GUANGDONG CHUANGSHENG STAINLESS STEEL PRODUCTS CO. Effective date: 20090814 |
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