CN103173644B - Super-hydrophobic porous aluminum alloy material and preparation method thereof - Google Patents
Super-hydrophobic porous aluminum alloy material and preparation method thereof Download PDFInfo
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- CN103173644B CN103173644B CN201110433299.6A CN201110433299A CN103173644B CN 103173644 B CN103173644 B CN 103173644B CN 201110433299 A CN201110433299 A CN 201110433299A CN 103173644 B CN103173644 B CN 103173644B
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Abstract
The invention relates to the technical field of metal material treatment, and particularly provides a super-hydrophobic porous aluminum alloy material and a preparation method thereof. The super-hydrophobic porous aluminum alloy material provided by the invention is dark red in color, the contact angle between the surface and water is 150-166 degrees, and the rolling angle of water drops on the surface is less than 10 degrees, thereby achieving favorable hydrophobicity. According to the preparation method of the super-hydrophobic porous aluminum alloy material, the preparation method has the advantages of simple operating process and favorable reproducibility; no expensive equipment or complicated chemical treatment processes are needed; improvement can be made on the basis of the traditional process; and the cost is low. Thus, the invention has good industrial application prospects.
Description
Technical field
The present invention relates to metallic substance processing technology field, refer in particular to a kind of super hydrophobic porous aluminum alloy materials and preparation method thereof.
Background technology
In recent years, super hydrophobic surface (contact angle of material surface and water is greater than 150 °, and water droplet has less roll angle from the teeth outwards) causes and studies interest widely.Because the contact area of liquid on super hydrophobic surface is very little, the phenomenons such as surface oxidation, burn into frost, conduction of current effectively can be suppressed; In addition, the water droplet of super hydrophobic surface can not stop at surface-stable, inclined surface just can tumble from surface and not leave any vestige a little, therefore, super hydrophobic surface is all with a wide range of applications in fields such as outdoor antenna, exterior coating, steamer, biomedical devices, microfluid, windshields.Aluminium alloy is a most widely used class non-ferrous metal structured material in industry, is widely used in aerospace, automobile, machinofacture, boats and ships and chemical industry.There is excellent electroconductibility, thermal conductivity, working plasticity, corrosion stability and higher intensity.But the metallic surface that conventional aluminium alloy surface treatment method obtains does not have self-cleaning property, easily contaminated, the application efficiency and the scope that are successfully prepared contributing to improving aluminium alloy of super-hydrophobic aluminum alloy.
Superhydrophobic surface of aluminum alloy is really used in actual industrial and agricultural production and daily life, and its preparation technology is crucial, is also basis.In recent years, develop the technology that some prepare superhydrophobic surface of aluminum alloy, as chemical Vapor deposition process, electrochemical deposition method, polyelectrolyte alternating deposit method, anonizing, plasma method, chemical method for etching etc.But, these methods existing or use the fluorinated siloxane that expensive material is as extremely low in surface energy, need special processing units as the technological process of plasma processing equipment or complexity, thus cost is higher, be difficult to industrialization, and the contact angle of the superhydrophobic surface of aluminum alloy produced and water is less than 150 °, water droplet is greater than 10 ° in the roll angle on surface, and hydrophobic performance is not good.
Summary of the invention
The invention reside in the problem not good for current super hydrophobic porous aluminum alloy materials hydrophobic performance, manufacturing process equipment is complicated and cost is higher, and super hydrophobic porous aluminum alloy materials of the one overcome the above problems and preparation method thereof is provided.
For achieving the above object, the present invention adopts following technical scheme:
A kind of super hydrophobic porous aluminum alloy materials, described aluminum alloy material surface is garnet, and the contact angle of surface and water is between 150 ° ~ 166 °, and water droplet is less than 10 ° in the roll angle on surface.
A preparation method for super hydrophobic porous aluminium alloy as above, is characterized in that, preparation comprises the processing step of following order:
(1) homogeneous for surface smooth fine aluminium or aluminum alloy plate materials are carried out mechanical polishing and polishing, remove surface imperfection and oxide film, with washed with de-ionized water 5-35 minute, and dry;
(2) soak sheet material 5-25 minute with 0.5-3mol/L hydrochloric acid soln, and by washed with de-ionized water, dry;
(3) Cu (NO that chemical pretreatment solution is 0.015-0.4mol/L is prepared
3)
2with the NaCl mixing solutions of 0.8-5g/L; Then immerse in chemical pretreatment solution by aluminium plate, the reaction times is 30-150 minute, makes its surface form spinel type CuAl
2o
4nanocrystalline, reacted aluminium plate distilled water is cleaned and dries or naturally do;
(4) then aluminium plate being put into massfraction is that the stearic acid ethanolic soln of 0.2-3% soaks, and the time is 10-50 minute, and temperature is 5-45 DEG C, reduces its surface free energy;
(5) use appropriate washes of absolute alcohol, taking out and wash down with clear water, is 60 ~ 75% in relative humidity, dry 4-45 hour under atmosphere at room temperature environment; Obtain described super hydrophobic porous aluminium alloy.
In described step 1, scavenging period is 25 minutes.
In described step 2, concentration of hydrochloric acid solution is 2mol/L, and soak time is 15 minutes.
Cu (NO in described step 3
3)
2concentration be the concentration of 0.2mol/L, NaCl be 3g/L, the reaction times is 80 minutes.
The concentration of the stearic acid ethanolic soln in described step 4 is 1%, and soak time is 30 minutes, and temperature is room temperature 25 DEG C.
In described step 5, relative humidity is 65%, drying 24 hours under atmosphere at room temperature environment.
Beneficial effect of the present invention is: super hydrophobic porous aluminum alloy materials of the present invention, is garnet, and the contact angle of surface and water is between 150 ° ~ 166 °, and water droplet is less than 10 ° in the roll angle on surface, has good hydrophobicity; Super hydrophobic porous aluminium alloy material preparation method for material of the present invention, preparation method's operating procedure is simple, favorable reproducibility, without the need to any expensive device, also do not need complicated chemical treating process, can improve in traditional technology, with low cost, there is good industrial applications prospect.
Accompanying drawing explanation
Fig. 1. the scanning electron microscope (SEM) photograph on the super-hydrophobic aluminum alloy surface that the embodiment of the present invention 1 obtains
Fig. 2. the super-hydrophobic aluminum alloy surface that the embodiment of the present invention 1 obtains and the contact angle test pattern of water
Embodiment:
Embodiment 1
First, first aluminum alloy plate materials is carried out mechanical polishing and polishing, remove surface imperfection and oxide film, clean 15 minutes respectively with ethanol and deionized water.Soak sheet material 15 minutes with 2mol/L hydrochloric acid soln, and by washed with de-ionized water, dry; 0.1mol/L cupric nitrate and the mixing of 4g/L sodium-chlor are also fully stirred and makes tank liquor; Aluminum alloy plate materials to be immersed in 30 DEG C ~ 40 DEG C tank liquors 80 minutes, fully clean with deionized water subsequently, and dry in furnace temperature 80-100 DEG C.Being soak 30 minutes in the stearic acid ethanolic soln of 1% at massfraction, is 60 ~ 75% in relative humidity, and under atmosphere at room temperature environment, drying 24 hours, can prepare superhydrophobic surface of aluminum alloy.The wettability of this coatingsurface is tested with OCA20 contact angle tester, result shows that the contact angle of this surface and water is respectively 160 ± 2 ° and 154 ± 2 °, as shown in Figure 1, for the scanning electron microscope (SEM) photograph on the present embodiment super-hydrophobic aluminum alloy surface, Fig. 2 is the contact angle test pattern of the present embodiment super-hydrophobic aluminum alloy surface and water.
Embodiment 2
First, first pure aluminum plate material is carried out mechanical polishing and polishing, remove surface imperfection and oxide film, clean 5 minutes respectively with ethanol and deionized water.Soak sheet material 25 minutes with 0.5mol/L hydrochloric acid soln, and by washed with de-ionized water, dry; 0.015mol/L cupric nitrate and the mixing of 0.8g/L sodium-chlor are also fully stirred and makes tank liquor; Aluminium sheet material to be immersed in 30 DEG C ~ 40 DEG C tank liquors 150 minutes, fully clean with deionized water subsequently, and dry in furnace temperature 80-100 DEG C.Being soak 50 minutes in the stearic acid ethanolic soln of 0.2% at massfraction, is 60 ~ 75% in relative humidity, and under atmosphere at room temperature environment, drying 45 hours, can prepare superhydrophobic surface of aluminum alloy.Test the wettability of this coatingsurface with OCA20 contact angle tester, result shows that the contact angle of this surface and water is respectively 162 ± 2 ° and 155 ± 2 °.
Embodiment 3
First, first aluminum alloy plate materials is carried out mechanical polishing and polishing, remove surface imperfection and oxide film, clean 35 minutes respectively with ethanol and deionized water.Soak sheet material 5 minutes with 3mol/L hydrochloric acid soln, and by washed with de-ionized water, dry; 0.2mol/L cupric nitrate and the mixing of 5g/L sodium-chlor are also fully stirred and makes tank liquor; Aluminum alloy plate materials to be immersed in 30 DEG C ~ 40 DEG C tank liquors 30 minutes, fully clean with deionized water subsequently, and dry in furnace temperature 80-100 DEG C.Being soak 10 minutes in the stearic acid ethanolic soln of 3% at massfraction, is 60 ~ 75% in relative humidity, and under atmosphere at room temperature environment, drying 24 hours, can prepare superhydrophobic surface of aluminum alloy.Test the wettability of this coatingsurface with OCA20 contact angle tester, result shows that the contact angle of this surface and water is respectively 161 ± 2 ° and 154 ± 2 °.
Embodiment 4
First, first aluminum alloy plate materials is carried out mechanical polishing and polishing, remove surface imperfection and oxide film, clean 25 minutes respectively with ethanol and deionized water.Soak sheet material 15 minutes with 2mol/L hydrochloric acid soln, and by washed with de-ionized water, dry; 0.2mol/L cupric nitrate and the mixing of 3g/L sodium-chlor are also fully stirred and makes tank liquor; Aluminum alloy plate materials to be immersed in 30 DEG C ~ 40 DEG C tank liquors 80 minutes, fully clean with deionized water subsequently, and dry in furnace temperature 80-100 DEG C.Being soak 30 minutes in the stearic acid ethanolic soln of 1% at massfraction, is 65% in relative humidity, and under atmosphere at room temperature environment, drying 28 hours, can prepare superhydrophobic surface of aluminum alloy.Test the wettability of this coatingsurface with OCA20 contact angle tester, result shows that the contact angle of this surface and water is respectively 163 ± 2 ° and 155 ± 2 °.
The above embodiment, just preferred embodiments of the present invention, be not limit the scope of the present invention, therefore all equivalences done according to structure, feature and the principle described in the present patent application the scope of the claims change or modify, and all should be included in patent claim of the present invention.
Claims (6)
1. a preparation method for super hydrophobic porous aluminium alloy, described super hydrophobic porous aluminum alloy material surface is garnet, and the contact angle of surface and water is between 150 ° ~ 166 °, and water droplet is less than 10 ° in the roll angle on surface; It is characterized in that, described super hydrophobic porous aluminum alloy materials preparation comprises the processing step of following order:
(1) homogeneous for surface smooth fine aluminium or aluminum alloy plate materials are carried out mechanical polishing and polishing, remove surface imperfection and oxide film, with washed with de-ionized water 5-35 minute, and dry;
(2) soak sheet material 5-25 minute with 0.5-3mol/L hydrochloric acid soln, and by washed with de-ionized water, dry;
(3) Cu (NO that chemical pretreatment solution is 0.015-0.4mol/L is prepared
3)
2with the NaCl mixing solutions of 0.8-5g/L; Then immerse in chemical pretreatment solution by aluminium plate, the reaction times is 30-150 minute, makes its surface form spinel type CuAl
2o
4nanocrystalline, reacted aluminium plate distilled water is cleaned and dries or naturally do;
(4) then aluminium plate being put into massfraction is that the stearic acid ethanolic soln of 0.2-3% soaks, and the time is 10-50 minute, and temperature is 5-45 DEG C, reduces its surface free energy;
(5) use appropriate washes of absolute alcohol, taking out and wash down with clear water, is 60 ~ 75% in relative humidity, dry 4-45 hour under atmosphere at room temperature environment; Obtain described super hydrophobic porous aluminium alloy.
2. the preparation method of super hydrophobic porous aluminium alloy according to claim 1, it is characterized in that, in described step 1, scavenging period is 25 minutes.
3. the preparation method of super hydrophobic porous aluminium alloy according to claim 1, it is characterized in that, in described step 2, concentration of hydrochloric acid solution is 2mol/L, and soak time is 15 minutes.
4. the preparation method of super hydrophobic porous aluminium alloy according to claim 1, is characterized in that, Cu (NO in described step 3
3)
2concentration be the concentration of 0.2mol/L, NaCl be 3g/L, the reaction times is 80 minutes.
5. the preparation method of super hydrophobic porous aluminium alloy according to claim 1, it is characterized in that, the concentration of the stearic acid ethanolic soln in described step 4 is 1%, and soak time is 30 minutes, and temperature is room temperature 25 DEG C.
6. the preparation method of super hydrophobic porous aluminium alloy according to claim 1, it is characterized in that, in described step 5, relative humidity is 65%, under atmosphere at room temperature environment dry 24 hours.
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Effective date of registration: 20180601 Address after: 408121 Chongqing Fuling District Long Bridge Industrial Park Patentee after: CHONGQING NANFU ALUMINIUM CO.,LTD. Address before: 510000 Guangdong science and Technology Industrial Development Zone, Guangzhou, 231 and 233 podium B1B2 Building 1, two, three, four Patentee before: BOAO ZONGHENG NETWORK TECHNOLOGY Co.,Ltd. Effective date of registration: 20180601 Address after: 510000 Guangdong science and Technology Industrial Development Zone, Guangzhou, 231 and 233 podium B1B2 Building 1, two, three, four Patentee after: BOAO ZONGHENG NETWORK TECHNOLOGY Co.,Ltd. Address before: 523808 room 103, building 7, songkeyuan, Songshan Lake Science and Technology Industrial Park, Dongguan, Guangdong Patentee before: DONGGUAN CAIZHIFANG NEW MATERIAL Co.,Ltd. |
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Granted publication date: 20141224 Termination date: 20201221 |