CN102418098A - Low-damage preparation method of super-hydrophobic surface of industrial aluminum foil - Google Patents
Low-damage preparation method of super-hydrophobic surface of industrial aluminum foil Download PDFInfo
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- CN102418098A CN102418098A CN201110273604XA CN201110273604A CN102418098A CN 102418098 A CN102418098 A CN 102418098A CN 201110273604X A CN201110273604X A CN 201110273604XA CN 201110273604 A CN201110273604 A CN 201110273604A CN 102418098 A CN102418098 A CN 102418098A
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Abstract
The invention provides a low-damage preparation method of a super-hydrophobic surface of an industrial aluminum foil. The method comprises the following steps of: firstly, ultrasonically cleaning the industrial aluminum foil with acetone and deionized water, blow-drying the industrial aluminum foil, then immerging the industrial aluminum foil into a NaOH water solution of which the concentration is 1mol/L to be processed for 30-60 seconds, then cleaning the industrial aluminum foil with ethanol and deionized water sequentially, and blow-drying the industrial aluminum foil for later use; soaking the preprocessed industrial aluminum foil in a prepared phosphoric acid and sodium fluoride mixed water solution, etching the industrial aluminum foil for 5 minutes in a water bath at the constant temperature of 70 DEG C, taking out the industrial aluminum foil, then cleaning the industrial aluminum foil with ethanol and deionized water, and blow-drying the industrial aluminum foil; and soaking the industrial aluminum foil processed by the mixed water solution in liquid stearic acid at 70 DEG C for 1 hour, then rinsing the industrial aluminum foil in hot ethanol at 70 DEG C, and finally curing the industrial aluminum foil in an oven at 80 DEG C for 30 minutes to obtain an industrial aluminum foil surface with super-hydrophobicity. The method provided by the invention is simple and convenient in operation, has low cost and small substrate damage, and is especially suitable for constructing thinner industrial aluminum foil surfaces with super-hydrophobicity.
Description
Technical field
The present invention relates to a kind of low damage preparation method at industrial aluminium foil super hydrophobic surface.
Background technology
Aluminium foil has light weight, extending, advantage such as electrical and thermal conductivity performance is good, and industrial aluminium foil is widely used in fields such as air conditioner heat radiator, automobile radiators, cable.The normal aluminium foil surface is wetting ability, is prone to take place problems such as condensation, burn into microbial contamination, frosting.Super hydrophobic surface has characteristics such as anti-freezing is revealed, corrosion-resistant, automatically cleaning, frosting resistance, can significantly promote the use properties of aluminium foil, has important economic benefit and social benefit.
Through years of development, the existing at present multiple method for preparing aluminium and duraluminum super hydrophobic surface is in the news, for example wet-chemical chamber method, organic and/or inorganics coating, anonizing etc.But for the preparation of aluminium foil super hydrophobic surface, prior art also exists following problem:
(1) the substrate damage is bigger
The part technology obtains the needed coarse structure of super hydrophobic surface through top-down etching means, but bigger to the damage of substrate.For example, the wet-chemical chamber fado adopts the solution that contains hydrochloric acid, sodium hydroxide to carry out etching, reacts comparatively violent, wayward, and being prone to during corrosive aluminum foil is having positions such as unrelieved stress, defective that penetration phenomenon takes place.
(2) complex treatment process
Anonizing is the conventional process that aluminium and alloy surface thereof are handled, but needs and technical matters combinations such as sandblasting, plasma treatment, and sample surfaces is handled, and just can prepare super hydrophobic surface, and technology is comparatively complicated.
Summary of the invention
The present invention provides the low damage preparation method of the low industrial aluminium foil super hydrophobic surface of a kind of industrial aluminium foil super hydrophobic surface damage.
The present invention adopts following technical scheme:
A kind of low damage preparation method of industrial aluminium foil super hydrophobic surface comprises following treatment step:
(1) pre-treatment: industrial aluminium foil through acetone, deionized water ultrasonic cleaning, is handled 30 ~ 60s in the NaOH aqueous solution of immersion 1mol/L after drying up, use ethanol, washed with de-ionized water then successively, it is subsequent use to dry up the back; Said industrial aluminum foil thickness is less than 0.1mm, and aluminium element content is 99.5%;
(2) coarse structure makes up: the mixed aqueous solution of preparation phosphoric acid and Sodium Fluoride, and thermostatically heating in 70 ℃ constant temperature water bath is immersed in the industrial aluminium foil after the pre-treatment wherein then, takes out behind the 5min, with ethanol, washed with de-ionized water and dry up; In the mixed aqueous solution of described phosphoric acid and Sodium Fluoride, concentration of phosphoric acid is 21 ~ 85g/L, and the concentration of Sodium Fluoride is 23 ~ 45g/L;
(3) chemical modification: the industrial aluminium foil after the mixed aqueous solution processing is soaked 1h in 70 ℃ liquid Triple Pressed Stearic Acid; In 70 ℃ hot ethanol, rinse then and wash; In baking oven, under 80 ℃, solidify 30min at last, can prepare industrial aluminium foil surface with superhydrophobic characteristic.
Adopt the industrial aluminium foil super hydrophobic surface of method preparation of the present invention, have following characteristics:
(1) mixed aqueous solution is little to the damage of industrial aluminium foil.Concentration of phosphoric acid is lower in the mixed aqueous solution that the present invention adopts; And the Sodium Fluoride that adds can further reduce the corrodibility of solution; Slow down to the etching speed and the etching depth of industrial aluminium foil, prevented the partial penetration of industrial aluminium foil in treating processes, and made technological process control easily.The thickness of the super-hydrophobic industrial aluminium foil after the processing is 0.03 ~ 0.035mm, and is as shown in Figure 1, and visible this technology is a kind of preparation method of low damage.
(2) when the mixed aqueous solution of phosphoric acid and Sodium Fluoride carries out etching to aluminium foil, aluminium foil surface also has other number of chemical reaction to take place.Wherein, Sodium ion, fluorion and aluminum ion can form the complex compound sodium fluoroaluminate that is slightly soluble in water, and phosphate anion meeting and aluminum ion reaction generate water-fast phosphagel phosphaljel, and oxidizing reaction also can generate aluminum oxide; These resultant of reaction constantly are deposited on industrial aluminium foil surface; Make industrial aluminium foil surface etch and deposition carry out simultaneously, thereby formed a kind of coarse structure of uniqueness, and further reduced damage industrial aluminium foil.Fig. 2 has proved the existence at industrial aluminium foil surface of sodium fluoroaluminate, phosphagel phosphaljel and aluminum oxide for handling the analytical results of postindustrial aluminium foil surface X-ray diffractometer, and corresponding pattern picture is as shown in Figure 3.Can find out that granular settling covers industrial aluminium foil surface equably, diameter is 1 ~ 5 μ m, and at regular intervals, and this has increased surperficial roughness undoubtedly, helps the structure of super-hydrophobicity.
(3) the static water droplet contact angle of the industrial aluminium foil super hydrophobic surface of preparation is greater than 150 °, and to the adhesion of water droplet very a little less than, water droplet is prone to come off.For example, the contact angle of the industrial aluminium foil super hydrophobic surface of the scheme preparation of employing instance 1 is 156 °, and water droplet is prone to come off, and sees Fig. 4 and Fig. 5.
Industrial aluminium foil super hydrophobic surface of the present invention can be applicable to the air-condition heat exchanger fin aluminium foil, but not only automatically cleaning, improve solidity to corrosion, also can make fin anti-freezing dew, frosting resistance.Simultaneously; Preparation technology provided by the invention is based on the wet-chemical chamber method; Required starting material are common solvents such as acetone, phosphoric acid, sodium-chlor, Triple Pressed Stearic Acid, ethanol; Required equipment is common devices such as Ultrasonic Cleaners, constant temperature water bath, cabinet-type electric furnace, and process step and operation of equipment are very simple.According to production-scale demand, can meet the demands through suitable adjustment, efficient is high, cost is low.
Description of drawings:
Fig. 1 is the sem photograph in super-hydrophobic industrial aluminium foil cross section in the instance 1;
Fig. 2 is a super-hydrophobic industrial aluminium foil surface X-ray diffractometer test collection of illustrative plates in the instance 1;
Fig. 3 is the sem photograph of industrial aluminium foil super hydrophobic surface in the instance 1;
Fig. 4 is the water droplet form of industrial aluminium foil super hydrophobic surface in the instance 1;
Fig. 5 is the water droplet adhesion test pattern of industrial aluminium foil super hydrophobic surface in the instance 1.
Embodiment
Instance 1
(1) with the thick industrial aluminium foil of 0.04mm (aluminium element content is 99.5%) successively with acetone, deionized water ultrasonic cleaning and dry up; Immerse subsequently in the NaOH aqueous solution of 1mol/L and handle, time 30 ~ 60s, in the present embodiment; Treatment time is 45s, to remove industrial aluminium foil surface film oxide;
(2) mixed aqueous solution of preparation phosphoric acid and Sodium Fluoride is positioned over thermostatically heating in 70 ℃ the constant temperature water bath, then the industrial aluminium foil after the pre-treatment is immersed in wherein, takes out behind the 5min, with ethanol, washed with de-ionized water and dry up; In the mixed aqueous solution of described phosphoric acid and Sodium Fluoride, concentration of phosphoric acid is 43g/L, and the concentration of Sodium Fluoride is 45g/L;
(3) the industrial aluminium foil after the aqueous solution soaking processing is soaked 1h in 70 ℃ liquid Triple Pressed Stearic Acid, in 70 ℃ hot ethanol, rinse then and wash, in baking oven, under 80 ℃, solidify 30min at last, can prepare industrial aluminium foil surface with superhydrophobic characteristic.
The cross section of the industrial aluminium foil of handling through aforesaid method is as shown in Figure 1, and the thickness in this aluminium foil thickness is 0.035mm, and thinnest part is 0.03mm.Fig. 2 is for handling the X-ray diffractometer analytical results of back aluminium foil surface; There are materials such as sodium fluoroaluminate, phosphagel phosphaljel, aluminum oxide in the postindustrial aluminium foil surface of display process, and corresponding microscopic appearance is as shown in Figure 3, particle size 1-5 μ m; Spacing 2 ~ 10 μ m, roughness is bigger.Fig. 4 shows the form of water droplet on this surface, and through demarcating, contact angle is 156 °, presents super-hydrophobicity.Fig. 5 is the water droplet adhesion test of super-hydrophobic aluminium foil surface, and the direction of arrow representes to lift with injection needles the heading of water droplet.On this surface, water droplet can break away from easily, shows that adhesion is very little.
Instance 2
(1) with the thick industrial aluminium foil of 0.04mm (aluminium element content is 99.5%) successively with acetone, deionized water ultrasonic cleaning and dry up; Immerse subsequently in the NaOH aqueous solution of 1mol/L and handle, time 30 ~ 60s, in the present embodiment; Treatment time is 30s, to remove industrial aluminium foil surface film oxide;
(2) mixed aqueous solution of preparation phosphoric acid and Sodium Fluoride is positioned over thermostatically heating in 70 ℃ the constant temperature water bath, then the industrial aluminium foil after the pre-treatment is immersed in wherein, takes out behind the 5min, with ethanol, washed with de-ionized water and dry up; In the mixed aqueous solution of described phosphoric acid and Sodium Fluoride, concentration of phosphoric acid is 85g/L, and the concentration of Sodium Fluoride is 23g/L;
(3) the industrial aluminium foil after the aqueous solution soaking processing is soaked 1h in 70 ℃ liquid Triple Pressed Stearic Acid, in 70 ℃ hot ethanol, rinse then and wash, in baking oven, solidify 30min down at last in 80 ℃.
The water droplet contact angle of the industrial aluminium foil surface of handling by this method is 153 °, and adhesion is very little, demonstrates excellent superhydrophobic characteristic.
Instance 3
(1) with the thick industrial aluminium foil of 0.04mm (aluminium element content is 99.5%) successively with acetone, deionized water ultrasonic cleaning and dry up; Immerse subsequently in the NaOH aqueous solution of 1mol/L and handle, time 30 ~ 60s, in the present embodiment; Treatment time is 60s, to remove industrial aluminium foil surface film oxide;
(2) mixed aqueous solution of preparation phosphoric acid and Sodium Fluoride is positioned over thermostatically heating in 70 ℃ the constant temperature water bath, then the industrial aluminium foil after the pre-treatment is immersed in wherein, takes out behind the 5min, with ethanol, washed with de-ionized water and dry up; In the mixed aqueous solution of described phosphoric acid and Sodium Fluoride, concentration of phosphoric acid is 21g/L, and the concentration of Sodium Fluoride is 35g/L;
(3) the industrial aluminium foil after the aqueous solution soaking processing is soaked 1h in 70 ℃ liquid Triple Pressed Stearic Acid, in 70 ℃ hot ethanol, rinse then and wash, in baking oven, solidify 30min down at last in 80 ℃.
The industrial aluminium foil surface of handling by this method also presents super-hydrophobicity, and the water droplet contact angle is 152 °, and adhesion is very little.
Claims (1)
1. the low damage preparation method of an industrial aluminium foil super hydrophobic surface is characterized in that said method comprises the following steps:
(1) pre-treatment: industrial aluminium foil through acetone, deionized water ultrasonic cleaning, is handled 30 ~ 60s in the NaOH aqueous solution of immersion 1mol/L after drying up, use ethanol, washed with de-ionized water then successively, it is subsequent use to dry up the back; Said industrial aluminum foil thickness is less than 0.1mm, and aluminium element content is 99.5%;
(2) coarse structure makes up: the mixed aqueous solution of preparation phosphoric acid and Sodium Fluoride, and thermostatically heating in 70 ℃ constant temperature water bath is immersed in the industrial aluminium foil after the pre-treatment wherein then, takes out behind the 5min, with ethanol, washed with de-ionized water and dry up; In the mixed aqueous solution of described phosphoric acid and Sodium Fluoride, concentration of phosphoric acid is 21 ~ 85g/L, and the concentration of Sodium Fluoride is 23 ~ 45g/L;
(3) chemical modification: the industrial aluminium foil after the mixed aqueous solution processing is soaked 1h in 70 ℃ liquid Triple Pressed Stearic Acid; In 70 ℃ hot ethanol, rinse then and wash; In baking oven, under 80 ℃, solidify 30min at last, can prepare industrial aluminium foil surface with superhydrophobic characteristic.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345127A (en) * | 2011-09-16 | 2012-02-08 | 东南大学 | Surface treatment method of superhydrophobic aluminum foil |
| CN102677059A (en) * | 2012-05-23 | 2012-09-19 | 江苏大学 | Super-hydrophobic aluminium and preparation method thereof |
| CN105870457A (en) * | 2016-06-06 | 2016-08-17 | 南京航空航天大学 | Aluminum foil current collator with surface modified and application thereof |
| CN106381033A (en) * | 2016-08-31 | 2017-02-08 | 黄山天马铝业有限公司 | Ultra-hydrophobic aluminum foil and production method thereof |
| CN106835140A (en) * | 2017-04-06 | 2017-06-13 | 中国工程物理研究院材料研究所 | A kind of method of phosphoric acid etching enhancing metallic nickel hydrophobic properties of the surface |
| CN107616826A (en) * | 2017-09-27 | 2018-01-23 | 吉林大学 | A kind of preparation method of the medical super-hydrophobic puncture needle of lower resistance |
| CN110747453A (en) * | 2019-11-18 | 2020-02-04 | 重庆大学 | Magnesium workpiece surface spraying liquid and application thereof |
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| JP2010007170A (en) * | 2008-06-30 | 2010-01-14 | Nippon Paint Co Ltd | Acid etching method, acid etching treatment device and method for producing aluminum-based member |
| CN101705488A (en) * | 2009-11-09 | 2010-05-12 | 东南大学 | Surface processing method of super-hydrophobic ice-covering-proof aluminum and steel with rough surface |
| CN102041509A (en) * | 2011-01-13 | 2011-05-04 | 中南大学 | Preparation method for constructing super-hydrophobic structure on surface of aluminum alloy |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010007170A (en) * | 2008-06-30 | 2010-01-14 | Nippon Paint Co Ltd | Acid etching method, acid etching treatment device and method for producing aluminum-based member |
| CN101705488A (en) * | 2009-11-09 | 2010-05-12 | 东南大学 | Surface processing method of super-hydrophobic ice-covering-proof aluminum and steel with rough surface |
| CN102041509A (en) * | 2011-01-13 | 2011-05-04 | 中南大学 | Preparation method for constructing super-hydrophobic structure on surface of aluminum alloy |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345127A (en) * | 2011-09-16 | 2012-02-08 | 东南大学 | Surface treatment method of superhydrophobic aluminum foil |
| CN102345127B (en) * | 2011-09-16 | 2013-01-30 | 东南大学 | Surface treatment method of superhydrophobic aluminum foil |
| CN102677059A (en) * | 2012-05-23 | 2012-09-19 | 江苏大学 | Super-hydrophobic aluminium and preparation method thereof |
| CN105870457A (en) * | 2016-06-06 | 2016-08-17 | 南京航空航天大学 | Aluminum foil current collator with surface modified and application thereof |
| CN106381033A (en) * | 2016-08-31 | 2017-02-08 | 黄山天马铝业有限公司 | Ultra-hydrophobic aluminum foil and production method thereof |
| CN106835140A (en) * | 2017-04-06 | 2017-06-13 | 中国工程物理研究院材料研究所 | A kind of method of phosphoric acid etching enhancing metallic nickel hydrophobic properties of the surface |
| CN106835140B (en) * | 2017-04-06 | 2019-04-23 | 中国工程物理研究院材料研究所 | A kind of method of phosphoric acid etching enhancing metallic nickel hydrophobic properties of the surface |
| CN107616826A (en) * | 2017-09-27 | 2018-01-23 | 吉林大学 | A kind of preparation method of the medical super-hydrophobic puncture needle of lower resistance |
| CN110747453A (en) * | 2019-11-18 | 2020-02-04 | 重庆大学 | Magnesium workpiece surface spraying liquid and application thereof |
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Application publication date: 20120418 |