CN104911599A - Method for preparation of aluminium alloy superhydrophobic self-cleaning surface by use of ultrafast laser - Google Patents
Method for preparation of aluminium alloy superhydrophobic self-cleaning surface by use of ultrafast laser Download PDFInfo
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Abstract
The present invention relates to a method for preparation of aluminium alloy superhydrophobic self-cleaning surface by use of ultrafast laser, and belongs to the metal substrate surface modification technical field. The method is as follows: first, an aluminium alloy sample is polished for pretreatment, the sample surface is cleaned with deionized water and absolute ethyl alcohol, after the sample surface is cleaned, the sample is blow-dried by cold air or dried in air, and then by use of laser processing technique, after regulation of relevant process parameters by use of the ultrafast laser, the sample surface is processed, the sample surface is processed to form countless micro structures, after the processing is completed, the processed sample is put into an electrically heated drying oven for baking to obtain aluminium alloy super hydrophobic surface provided with micron-scale or nanoscale mastoid-shaped structures. The surface has the function of self-cleaning and excellent friction resistance, and corrosion resistance. The preparation method is simple in process, convenient in operation, high in efficiency, less in energy consumption, low in cost, green, and environmentally friendly, and the industrial application is easy to realize.
Description
Technical field:
The invention belongs to metallic substrate surface technical field of modification, relate to the preparation method of bionic super-hydrophobic self-cleaning surface on alloy matrix aluminum, more particularly, the present invention relates to a kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface.
Background technology:
At occurring in nature, the currently used many science and technology of the mankind all obtain inspiration and inspiration from the Nature, and super hydrophobic surface is a kind of very common phenomenon in the Nature.The surface of such as lotus leaf just has very strong hydrophobicity and self-cleaning function.The hydrophobicity of lotus leaf surface is mainly studied super-hydrophobic to the enlightenment that the mankind produce, and self-cleaning is then super-hydrophobic result, therefore prepares super hydrophobic surface on the metal material and is more and more paid close attention to.Because super hydrophobic surface has special wetting property, make it form special characteristic on its surface, the clean and erosion-resisting characteristic of clean surfaces can be reached, all have broad application prospects in many aspects.People thirst for by ultra-hydrophobicity application in the industrial production, on alloy matrix aluminum, especially preparing the surface of ultra-hydrophobicity.Usual regulation, super hydrophobic surface refers to and to be greater than 150 °, the roll angle TA surface that is less than 10 ° with water contact angle CA.When water droplet is less than 10 degree in the roll angle that super hydrophobic surface contacts with water, this super hydrophobic surface has self-cleaning function, absorb polluted matter in the process can rolled at drop in the surface with self-cleaning function is also taken away surface, thus reaches the object of self-cleaning.
In recent years, ultra-hydrophobicity range of application is also come more extensive, the preparation that metallic substance is super-hydrophobic, and especially the preparation of superhydrophobic surface of aluminum alloy more and more receives the concern of people.Aluminium alloy has low density because of it, excellent heat conduction and electroconductibility, higher intensity, and becomes important structured material, is used widely in the field such as aerospace, automotive industry.Use the method for laser directly to change aluminum alloy surface performance, it will be a promising technical study that preparation has the double-deck super hydrophobic surface of micro-nano-scale.The wetting property of metallic substance is the very important feature in metallic surface, and the microtexture of material and moiety joint effect the wetting property of material surface.The preparation method that metal is prepared super hydrophobic surface is a lot, typical method and approach mainly contain: chemical medicinal liquid etch, electrochemical etching+chemical corrosion method, laser ablation+chemical corrosion method etc., but the immersion of these technology ubiquity chemical medicinal liquids, chemical pollution can be produced, complex steps, the shortcomings such as time-consuming and preparation efficiency is low, these shortcomings all limit its practical application.Such as, application number is the preparation method that patent discloses a kind of aluminium alloy bionic super-hydrophobic surface of 201310079939.7, first with washes of absolute alcohol aluminium alloy, then laser processing is carried out in aluminum alloy surface, the cratering structure of countless microscale is processed at specimen surface, again sample is immersed in chemical etching solution, the shape characteristic of specimen surface is changed, but the method does not break through the process of surface treatment of traditional chemical etching completely, also chemical etching is make use of further after adopting laser processing technology, and the toluene solution that the aluminum alloy specimen after chemical etching is put into containing DTS is modified, the film of low surface energy is formed gradually on its surface, this complex treatment process, and employ high malicious carcinogenic substance toluene, easily cause environmental pollution.In order to effectively obtain super hydrophobic surface, also need to carry out necessary modification with low-surface energy substance effects on surface, the efficiency of processing is not high.Such as, application number be 201410657627.4 patent discloses a kind of ultra-hydrophobic high sticking metallic surface and preparation method thereof, prepared the periodicity micro nano structure of class Rose surface microstructure in metallic surface by superpower psec or femtosecond laser, again by the finishing of low free energy material, achieve the preparation of ultra-hydrophobic high sticking metallic surface, the method adopts low-surface energy substance effects on surface to carry out necessary modification, and working (machining) efficiency is low.Also Chinese scholars is had to utilize femto-second laser single stage method to prepare the surface such as platinum, titanium, copper of super-hydrophobic automatic cleaning recently.Such as, application number is the preparation method that application discloses the super-hydrophobic micro-nano structure of a kind of titanium alloy surface of 201410788477.0, first carries out ultrasonic cleaning with acetone and raw spirit respectively to titanium alloy sample, obtains the titanium alloy sample of surface clean; Then femtosecond laser lithography process is carried out on the titanium alloy sample surface that effects on surface is clean, and a step obtains the titanium alloy sample with grating type or well type or the super-hydrophobic micro-nano structure surface of blind round hole type; Application number be 200910183588.8 patent discloses a kind of bionic metal ultra-wetting trans-scale structure design method and preparation method, the method is by complicated super hydrophilic Design Theory, pending sample is placed in high vacuum chamber, twice sweep is carried out respectively under different angles, final acquisition access expansion biological surface pattern across scale micro-structure, but the method strictly need control various process parameters, and processing cost is too high, be not suitable for industrialization scale operation completely.
In sum, simple in order to develop a kind of technique, preparation efficiency is high, be applicable to commercial application, and do not produce any environmental pollution, disposablely realizing metallic substrate surface super-hydrophobicity and without the need to the method through any chemical technology process, is current researcher technical problem urgently to be resolved hurrily.
Summary of the invention
In order to overcome the deficiency that prior art exists, the object of the present invention is to provide a kind of technique simple, preparation efficiency is high, the preparation method on the aluminium alloy super-hydrophobic automatic cleaning surface of environmental protection.Method of the present invention can obtain steady in a long-term, contact angle at various size and different shapes aluminum alloy material surface and be greater than 150 °, the roll angle super-hydrophobic automatic cleaning surface that is less than 10 °, and simultaneously obtained surface also has outstanding rub resistance corrosion resistance nature.
The object of the invention is to be achieved through the following technical solutions: a kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface, described method comprises the steps:
Step one, carries out polishing pre-treatment by pending aluminum alloy surface, obtains the aluminum alloy sample after surface finish;
Step 2, aluminum alloy sample after surface finish described in step one is placed in the ultrasonic washing instrument filling deionized water and cleans, then use washes of absolute alcohol, after cleaning up, described aluminum alloy sample surface cold wind to be dried up or room temperature is dried naturally, obtain clean aluminum alloy sample;
Step 3, utilizes laser processing technology, carries out laser scanning process, process countless microstructures at sample surfaces after adopting ultrafast laser to regulate relevant processing parameter to the clean aluminium alloy sample surfaces obtained described in step 2;
Described laser scanning adopts galvanometer system to carry out beam flying, and the speed of vibration mirror scanning is 0.1mm/s-30m/s, and the break-make of laser and the sweep limit of galvanometer system, track while scan and process velocity control and setting by computer program;
Or described laser scanning uses motion platform system to realize, and is fixed by light beam, sample relative beam moves, and the speed of Platform movement is 0.1mm/s-3m/s, and the break-make of laser, Platform movement track and speed control and setting by computer program;
Step 4, puts into fixed temperature and humidity electrically heated drying cabinet by the aluminum alloy sample of the surface obtained described in step 3 after laser processing process and toasts, and namely obtains described aluminium alloy super-hydrophobic automatic cleaning surface;
Wherein, the ultrafast laser wavelength described in step 3 is less than 1000nm, and described laser processing parameter is: pulsewidth is greater than 30fs, and single pulse energy is less than 0.1mJ.
Further, the aluminium alloy described in technique scheme is preferably 2a12 aluminium alloy.
Further, in technique scheme, the repetition rate of ultrafast laser described in step 3 is 10kHz-200kHz, and described pulsewidth is 30fs-10ps.
Further preferably, the pulsewidth of described ultrafast laser is 80fs-800fs.
Still more preferably, the wavelength of described ultrafast laser is 800nm, and pulsewidth is 90fs-550fs.
Again further preferably, described pulsewidth is 90fs, and described single pulse energy is 20 μ J-50 μ J, and described laser scanning speed is 60mm/s-80mm/s.
Again further preferably, described pulsewidth is 550fs, and described single pulse energy is 20 μ J-50 μ J, and described laser scanning speed is 40mm/s-60mm/s.
Preferably, the repetition rate of described ultrafast laser is 10kHz, and described single pulse energy is 20 μ J, and described laser scanning speed is 60mm/s.
Further, pressure in electrically heated drying cabinet described in technique scheme step 4 is normal atmospheric pressure, and humidity is 40%-60%RH, and temperature is 100 DEG C-250 DEG C, the time of described sample baking is 2-8 hour, and the temperature error in described electrically heated drying cabinet is ± 1 DEG C.
Still more preferably, the humidity in described fixed temperature and humidity electrically heated drying cabinet is 55%RH, and temperature is 200 DEG C, and the time of baking is 4 hours.
Further, polishing pre-treatment in technique scheme described in step one adopts the pre-grinding test sample of gold phase machine that power is 370W, lap speed is 450 revs/min, lap diameter is 230mm, polishing preprocessing process needs that auxiliary diameter is 200mm, 1000 object SiC waterproof abrasive papers carry out polished finish in described aluminum alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes.
Further, in technique scheme, described in step 2, the ultrasonic frequency of ultrasonic cleaning instrument is 40kHz, and described deionized water resistivity is 18.25 megaohms, and aluminum alloy sample surface should be flooded by described deionized water, at room temperature continuous wash 30 minutes.
Present invention also offers the aluminium alloy super-hydrophobic automatic cleaning surface prepared by aforesaid method, described surface has micron order or nano level papillary structure.
Compared with prior art, the inventive method has the following advantages:
(1) the aluminum alloy surface maximum contact angle utilizing the inventive method to prepare can reach 167.6 °, and minimum roll angle is 3.1 °, therefore has extraordinary ultra-hydrophobicity.
(2) preparation method's technique of the present invention is simple, easy to operate, efficiency is high, less energy consumption, cost is low, overcomes the defect that tradition uses chemical reagent etching aluminum alloy surface or still need to adopt the further modification of surfaces of low-surface energy substance again after laser processing completes completely, environmental protection, do not adopt any chemical reagent coating, and the processing parameter of the inventive method easily controls, be easy to realize industrial application.
(3) the super-hydrophobic aluminum alloy metallic surface stable performance adopting the inventive method to prepare, possesses the rub resistance of self-cleaning function and excellence and corrosion-resistant energy performance, considerably increases the work-ing life of aluminium alloy.
Accompanying drawing explanation
Fig. 1 (a), (b) are respectively contact angle schematic diagram, the roll angle schematic diagram on the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 1 utilizes ultrafast laser to prepare;
Fig. 2 (c), (d) are respectively contact angle schematic diagram, the roll angle schematic diagram on the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 2 utilizes ultrafast laser to prepare;
Fig. 3 (e), (f) are respectively contact angle schematic diagram, the roll angle schematic diagram on the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 3 utilizes ultrafast laser to prepare;
Fig. 4 (g), (h) are respectively contact angle schematic diagram, the roll angle schematic diagram on the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 4 utilizes ultrafast laser to prepare;
Fig. 5 is the scanning electron microscope (SEM) photograph on the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 1 utilizes ultrafast laser to prepare;
Fig. 6 is the scanning electron microscope (SEM) photograph on the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 2 utilizes ultrafast laser to prepare;
Fig. 7 is the scanning electron microscope (SEM) photograph on the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 3 utilizes ultrafast laser to prepare;
Fig. 8 is the scanning electron microscope (SEM) photograph on the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 4 utilizes ultrafast laser to prepare.
Embodiment
For a better understanding of the present invention, below in conjunction with specific embodiment, technical scheme of the present invention is described in further detail.
The experimental technique used in following embodiment if no special instructions, is ordinary method.
The preparation method on a kind of aluminium alloy super-hydrophobic automatic cleaning surface of the present invention, with reference to nature biotechnology material as design basis, 2a12 aluminum alloy surface is imitated the constitutional features of nature biotechnology matrix material fine structure distribution, design surface structure.
Embodiment 1
A kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending 2a12 aluminium alloy polishing, power is selected to be 370W, lap speed is 450 revs/min, lap diameter is the pre-grinding test sample of gold phase machine of 230mm, polishing process needs that auxiliary diameter is 200mm, 1000 object SiC waterproof abrasive papers carry out polished finish in described aluminum alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the aluminum alloy sample after surface finish;
Step 2, aluminum alloy sample ultrasonic washing instrument after surface finish described in step one is cleaned, ultrasonic washing instrument ultrasonic frequency is 40kHz, sample surfaces is flooded with the deionized water that resistivity is 18.25 megaohms, at room temperature, continuous wash 30 minutes, then washes of absolute alcohol is used, after cleaning up, room temperature is dried naturally, obtains clean aluminum alloy sample;
Step 3, adopt ultrafast laser, laser wavelength is 800nm, carries out laser scanning manufacturing, process countless microstructures at sample surfaces to the clean aluminium alloy sample surfaces obtained described in step 2, described laser apparatus pulsewidth is 90fs, and single pulse energy is 20 μ J, and repetition rate is 10kHz, and described laser scanning utilizes X-Y scanning galvanometer system, makes laser beam with the speed of 80mm/s aluminum alloy sample surface described in ablation line by line, described galvanometer system is by X-Y optical scanning head, electric drive amplifier, optical reflecting lens and field lens composition, the sweep limit of described galvanometer system and speed, line sweep and Surface scan path are undertaken controlling and setting by computer, the signal that described computer provides is by drive amplification circuit drives optical scanning head, thus the deflection of laser beam is controlled at X-Y plane, sample moves in the x-direction relative to laser beam, by controlling translational speed and laser pulse repetition frequency, its pulse matching degree is made to reach 1%-99%, complete after moving, single step stepping in the y-direction again, by control step distance, its light beam overlap ratio is made to reach 1%-99% in y direction, worktable reverses, described sample work range is 126mm x 126mm,
Step 4, the sample after processing, after step 3 laser processing, is put in electrically heated drying cabinet and is toasted by sample, air pressure be normal atmospheric pressure, humidity is 55%RH, and temperature is that under 200 DEG C of conditions, constant temperature toasts 6 hours, obtains described aluminium alloy super-hydrophobic automatic cleaning surface.
Employing resistivity is the deionized water of 18.25 megaohms, utilize the contact angle of the aluminium alloy super-hydrophobicity self-cleaning surface obtained described in the test of optical contact angle surface interfacial tension survey meter, roll angle: adopt the method that accesses to measure, volume required suspension drop is formed under liquid feeding syringe needle, the Z axis of example platform is regulated to make sample surfaces increase, when sample surfaces is with when contacting bottom the drop hung under liquid feeding syringe needle, drop just transfers to sample surfaces from liquid feeding syringe needle, and then measure by regulating sample table Z axis to make sample surfaces drop to original position, because the aluminum alloy surface ultra-hydrophobicity prepared is excellent, the water droplet of 3-8 microlitre cannot adhere to, so drop volume is 9 microlitres, probe temperature is 25.5 DEG C, humidity is 19.5%RH.
Aluminium alloy super-hydrophobic automatic cleaning that the present embodiment prepares surface, its stereoscan photograph as shown in Figure 5, the nano level papillary structure of its surface presentation.
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares and the contact angle schematic diagram of water are as shown in Fig. 1 (a), and roll angle schematic diagram is as shown in Fig. 1 (b).
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares is 167.6 ° with the contact angle of water, and roll angle is 8.9 °, and test result is in table 1.
Embodiment 2
A kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending 2a12 aluminium alloy polishing, power is selected to be 370W, lap speed is 450 revs/min, lap diameter is the pre-grinding test sample of gold phase machine of 230mm, polishing process needs that auxiliary diameter is 200mm, 1000 object SiC waterproof abrasive papers carry out polished finish in described aluminum alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the aluminum alloy sample after surface finish;
Step 2, aluminum alloy sample ultrasonic washing instrument after surface finish described in step one is cleaned, ultrasonic washing instrument ultrasonic frequency is 40kHz, sample surfaces is flooded with the deionized water that resistivity is 18.25 megaohms, at room temperature, continuous wash 30 minutes, then washes of absolute alcohol is used, after cleaning up, dry up with cold wind, obtain clean aluminum alloy sample;
Step 3, adopt ultrafast laser, laser wavelength is 800nm, laser scanning manufacturing is carried out to the clean aluminium alloy sample surfaces obtained described in step 2, countless microstructures is processed at sample surfaces, described laser apparatus pulsewidth is 90fs, single pulse energy is 50 μ J, repetition rate is 10kHz, the clean aluminium alloy sample obtained described in step 2 is fixed on motion workplatform, utilize lens by laser beam focusing on to the sample, make the surface of sample relative to the focusing etching hot spot of described ultrafast laser light beam along x, y, z three-dimensional direction moving, speed is 60mm/s, by aluminum alloy sample described in ablation is surperficial line by line, realize the etching of micro-nano structure, described motion platform unit is three-dimensional servo precision mobile platform, and the scope of described platform movement, speed, direction, can along X, Y, Z three-dimensional direction movings by computer control, and sample work range is 150mm x 150mm,
Step 4, the sample after processing, after step 3 laser processing, is put in electrically heated drying cabinet and is toasted by sample, air pressure be normal atmospheric pressure, humidity is 60%RH, and temperature is that under 100 DEG C of conditions, constant temperature toasts 8 hours, obtains described aluminium alloy super-hydrophobic automatic cleaning surface.
Adopt contact angle, the roll angle on the aluminium alloy super-hydrophobic automatic cleaning surface obtained described in the identical testing method of above-described embodiment 1 and test condition test.
Aluminium alloy super-hydrophobic automatic cleaning that the present embodiment prepares surface, its stereoscan photograph as shown in Figure 6, the micron-sized papillary structure of its surface presentation.
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares and the contact angle schematic diagram of water are as shown in Fig. 2 (c), and roll angle schematic diagram is as shown in Fig. 2 (d).
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares is 164.1 ° with the contact angle of water, and roll angle is 3.1 °, and test result is in table 1.
Embodiment 3
A kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending 2a12 aluminium alloy polishing, power is selected to be 370W, lap speed is 450 revs/min, lap diameter is the pre-grinding test sample of gold phase machine of 230mm, polishing process needs that auxiliary diameter is 200mm, 1000 object SiC waterproof abrasive papers carry out polished finish in described aluminum alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the aluminum alloy sample after surface finish;
Step 2, aluminum alloy sample ultrasonic washing instrument after surface finish described in step one is cleaned, ultrasonic washing instrument ultrasonic frequency is 40kHz, sample surfaces is flooded with the deionized water that resistivity is 18.25 megaohms, at room temperature, continuous wash 30 minutes, then washes of absolute alcohol is used, after cleaning up, room temperature is dried naturally, obtains clean aluminum alloy sample;
Step 3, adopt ultrafast laser, laser wavelength is 800nm, carry out laser scanning manufacturing to the clean aluminium alloy sample surfaces obtained described in step 2, process countless microstructures at sample surfaces, the pulsewidth of described laser apparatus is 550fs, single pulse energy is 20 μ J, repetition rate is 10kHz, and described laser scanning utilizes X-Y scanning galvanometer system, makes laser beam with the speed of 60mm/s aluminum alloy sample surface described in ablation line by line, described galvanometer system is by X-Y optical scanning head, electric drive amplifier, optical reflecting lens and field lens composition, the sweep limit of described galvanometer system and speed, line sweep and Surface scan path are undertaken controlling and setting by computer, the signal that described computer provides is by drive amplification circuit drives optical scanning head, thus the deflection of laser beam is controlled at X-Y plane, sample moves in the x-direction relative to laser beam, by controlling translational speed and laser pulse repetition frequency, its pulse matching degree is made to reach 1%-99%, complete after moving, single step stepping in the y-direction again, by control step distance, its light beam overlap ratio is made to reach 1%-99% in y direction, worktable reverses, described sample work range is 126mm x 126mm,
Step 4, the sample after processing, after step 3 laser processing, is put in electrically heated drying cabinet and is toasted by sample, air pressure be normal atmospheric pressure, humidity is 55%RH, and temperature is that under 200 DEG C of conditions, constant temperature toasts 4 hours, obtains described aluminium alloy super-hydrophobic automatic cleaning surface.
Adopt contact angle, the roll angle on the aluminium alloy super-hydrophobic automatic cleaning surface obtained described in the identical testing method of above-described embodiment 1 and test condition test.
Aluminium alloy super-hydrophobic automatic cleaning that the present embodiment prepares surface, its stereoscan photograph as shown in Figure 7, the micron-sized papillary structure of its surface presentation.
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares and the contact angle schematic diagram of water are as shown in Fig. 3 (e), and roll angle schematic diagram is as shown in Fig. 3 (f).
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares is 167.6 ° with the contact angle of water, and roll angle is 5.7 °, and test result is in table 1.
Embodiment 4
A kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending 2a12 aluminium alloy polishing, polishing selects power to be 370W, lap speed is 450 revs/min, lap diameter is the pre-grinding test sample of gold phase machine of 230mm, polishing process needs that auxiliary diameter is 200mm, 1000 object SiC waterproof abrasive papers carry out polished finish in described aluminum alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the aluminum alloy sample after surface finish;
Step 2, aluminum alloy sample ultrasonic washing instrument after surface finish described in step one is cleaned, ultrasonic washing instrument ultrasonic frequency is 40kHz, floods sample surfaces, at room temperature with the deionized water that resistivity is 18.25 megaohms, continuous wash 30 minutes,, then use washes of absolute alcohol, after cleaning up, room temperature is dried naturally, obtains clean aluminum alloy sample;
Step 3, adopt ultrafast laser, laser wavelength is 800nm, laser processing is carried out to the clean aluminium alloy sample surfaces obtained described in step 2, countless microstructures is processed at sample surfaces, the pulsewidth of described laser apparatus is 550fs, single pulse energy is 50 μ J, repetition rate is 10kHz, described laser scanning routing motion workplatform, the clean aluminium alloy sample obtained described in step 2 is fixed on motion workplatform, utilize lens by laser beam focusing on to the sample, make the surface of sample relative to the focusing etching hot spot of described ultrafast laser light beam along x, y, z three-dimensional direction moving, speed is 40mm/s, by aluminum alloy sample described in ablation is surperficial line by line, realize the etching of micro-nano structure, described motion platform unit is three-dimensional servo precision mobile platform, and the scope of described platform movement, speed, direction, can along X, Y, Z three-dimensional direction movings by computer control, and sample work range is 150mm x 150mm,
Step 4, the sample after processing, after step 3 laser processing, is put in electrically heated drying cabinet and is toasted by sample, air pressure be normal atmospheric pressure, humidity is 48%RH, and temperature is that under 250 DEG C of conditions, constant temperature toasts 2 hours, obtains described aluminium alloy super-hydrophobic automatic cleaning surface.
Adopt contact angle, the roll angle on the aluminium alloy super-hydrophobic automatic cleaning surface obtained described in the identical testing method of above-described embodiment 1 and test condition test.
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares, its stereoscan photograph as shown in Figure 8.The nano level papillary structure of its surface presentation.
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares and the contact angle schematic diagram of water are as shown in Fig. 4 (g), and roll angle schematic diagram is as shown in Fig. 4 (h).
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares is 159.8 ° with the contact angle of water, and roll angle is 8.7 °, and test result is in table 1.
The aluminium alloy super-hydrophobic automatic cleaning surface contact angle that table 1 prepares for various embodiments of the present invention, the test result of roll angle.
Table 1
| Embodiment | Contact angle/° | Roll angle/° |
| Embodiment 1 | 167.6 | 8.9 |
| Embodiment 2 | 164.1 | 3.1 |
| Embodiment 3 | 167.6 | 5.7 |
| Embodiment 4 | 159.8 | 8.7 |
The above embodiment of the present invention is only used to clearly demonstrate the citing that the present invention does, and is not the restriction to embodiments of the present invention.Every any amendment of doing in the present invention's spirit and principle, equivalent replacement and improvement etc., within the protection domain that all should be included in the claims in the present invention.
Claims (10)
1. utilize ultrafast laser to prepare the method on aluminium alloy super-hydrophobic automatic cleaning surface, it is characterized in that: described method comprises the steps:
Step one, carries out polishing pre-treatment by pending aluminum alloy surface, obtains the aluminum alloy sample after surface finish;
Step 2, aluminum alloy sample after surface finish described in step one is placed in the ultrasonic washing instrument filling deionized water and cleans, then use washes of absolute alcohol, after cleaning up, described aluminum alloy sample surface cold wind to be dried up or room temperature is dried naturally, obtain clean aluminum alloy sample;
Step 3, utilizes laser processing technology, carries out laser scanning process, process countless microstructures at sample surfaces after adopting ultrafast laser to regulate relevant processing parameter to the clean aluminium alloy sample surfaces obtained described in step 2;
Described laser scanning adopts galvanometer system to carry out beam flying, and the speed of vibration mirror scanning is 0.1mm/s-30m/s, and the break-make of laser and the sweep limit of galvanometer system, track while scan and process velocity control and setting by computer program;
Or described laser scanning uses motion platform system to realize, and is fixed by light beam, sample relative beam moves, and the speed of Platform movement is 0.1mm/s-3m/s, and the break-make of laser, Platform movement track and speed control and setting by computer program;
Step 4, puts into fixed temperature and humidity electrically heated drying cabinet by the aluminum alloy sample of the surface obtained described in step 3 after laser processing process and toasts, and namely obtains described aluminium alloy super-hydrophobic automatic cleaning surface;
Wherein, the ultrafast laser wavelength described in step 3 is less than 1000nm, and described laser processing parameter is: pulsewidth is greater than 30fs, and single pulse energy is less than 0.1mJ.
2. a kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface as claimed in claim 1, is characterized in that: described aluminium alloy is 2a12 aluminium alloy.
3. a kind of method utilizing ultrafast laser to prepare superhydrophobic surface of aluminum alloy as claimed in claim 1 or 2, is characterized in that: the repetition rate of ultrafast laser described in step 3 is 10kHz-200kHz, and described pulsewidth is 30fs-10ps.
4. a kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface as claimed in claim 3, is characterized in that: the pulsewidth of described ultrafast laser is 80fs-800fs.
5. a kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface as claimed in claim 4, is characterized in that: the wavelength of described ultrafast laser is 800nm, and pulsewidth is 90fs-550fs.
6. a kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface as claimed in claim 5, it is characterized in that: described pulsewidth is 90fs, described single pulse energy is 20 μ J-50 μ J, and described laser scanning speed is 60mm/s-80mm/s.
7. a kind of method utilizing ultra-short pulse laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface as claimed in claim 5, it is characterized in that: described pulsewidth is 550fs, described single pulse energy is 20 μ J-50 μ J, and described laser scanning speed is 40mm/s-60mm/s.
8. a kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface as claimed in claim 7, it is characterized in that: the repetition rate of described ultrafast laser is 10kHz, described single pulse energy is 20 μ J, and described laser scanning speed is 60mm/s.
9. a kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface as claimed in claim 1, it is characterized in that: the pressure in electrically heated drying cabinet described in step 4 is normal atmospheric pressure, humidity is 40%-60%RH, temperature is 100 DEG C-250 DEG C, the time of described sample baking is 2-8 hour, and the temperature error in described electrically heated drying cabinet is ± 1 DEG C.
10. a kind of method utilizing ultrafast laser to prepare aluminium alloy super-hydrophobic automatic cleaning surface as claimed in claim 9, it is characterized in that: the humidity in described fixed temperature and humidity electrically heated drying cabinet is 55%RH, temperature is 200 DEG C, and the time of baking is 4 hours.
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| CN (1) | CN104911599B (en) |
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| CN106367739A (en) * | 2016-12-02 | 2017-02-01 | 江苏理工学院 | Method for preparing brass-based super-hydrophobic microstructural surface |
| CN107096996A (en) * | 2017-05-05 | 2017-08-29 | 吉林大学 | A kind of preparation method on the anti-icing surface of bionic super-hydrophobic aluminium alloy without modification |
| CN107096998A (en) * | 2017-05-08 | 2017-08-29 | 英诺激光科技股份有限公司 | It is a kind of to carry out anticorrosive beating calibration method using ultrafast laser |
| CN107365998A (en) * | 2017-07-17 | 2017-11-21 | 英诺激光科技股份有限公司 | Using laser the method and its application of corrosion-resistant treatments are carried out in metal surface |
| CN107723773A (en) * | 2017-08-22 | 2018-02-23 | 吉林大学 | A kind of preparation method on the bionical anti-icing surface of aluminium alloy |
| CN107914079A (en) * | 2017-11-14 | 2018-04-17 | 厦门大学 | A kind of anti-corrosion reinforced aluminium magnesium alloy preparation method of new pattern laser processing |
| CN109693039A (en) * | 2018-12-27 | 2019-04-30 | 北京航空航天大学 | A kind of method of silicon chip surface laser polishing |
| CN111420934A (en) * | 2020-03-26 | 2020-07-17 | 中国科学院空天信息创新研究院 | Laser belt cleaning device based on light beam transform |
| CN112609218A (en) * | 2020-11-18 | 2021-04-06 | 中国兵器科学研究院宁波分院 | Preparation method of super-hydrophobic micro-arc oxidation composite membrane |
| CN113001026A (en) * | 2021-03-15 | 2021-06-22 | 西安交通大学 | Method for preparing super-hydrophobic surface based on femtosecond laser and temperature control aging comprehensive regulation |
| CN115008018A (en) * | 2022-04-28 | 2022-09-06 | 西安交通大学 | Method for preparing durable super-hydrophobic surface through femtosecond laser composite rare earth nano modification |
| CN115786652A (en) * | 2023-01-09 | 2023-03-14 | 中国科学院长春光学精密机械与物理研究所 | Intrinsic super-hydrophobic material, preparation method and application thereof |
| CN116140938A (en) * | 2023-03-06 | 2023-05-23 | 广东工业大学 | Processing method of macro-micro composite array wear-resistant super-hydrophobic surface and metal piece |
| CN116265595A (en) * | 2021-12-17 | 2023-06-20 | 中国科学院长春光学精密机械与物理研究所 | Corrosion-resistant aluminum alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106367739A (en) * | 2016-12-02 | 2017-02-01 | 江苏理工学院 | Method for preparing brass-based super-hydrophobic microstructural surface |
| CN107096996A (en) * | 2017-05-05 | 2017-08-29 | 吉林大学 | A kind of preparation method on the anti-icing surface of bionic super-hydrophobic aluminium alloy without modification |
| CN107096998A (en) * | 2017-05-08 | 2017-08-29 | 英诺激光科技股份有限公司 | It is a kind of to carry out anticorrosive beating calibration method using ultrafast laser |
| CN107365998A (en) * | 2017-07-17 | 2017-11-21 | 英诺激光科技股份有限公司 | Using laser the method and its application of corrosion-resistant treatments are carried out in metal surface |
| CN107723773A (en) * | 2017-08-22 | 2018-02-23 | 吉林大学 | A kind of preparation method on the bionical anti-icing surface of aluminium alloy |
| CN107914079A (en) * | 2017-11-14 | 2018-04-17 | 厦门大学 | A kind of anti-corrosion reinforced aluminium magnesium alloy preparation method of new pattern laser processing |
| CN109693039A (en) * | 2018-12-27 | 2019-04-30 | 北京航空航天大学 | A kind of method of silicon chip surface laser polishing |
| CN111420934A (en) * | 2020-03-26 | 2020-07-17 | 中国科学院空天信息创新研究院 | Laser belt cleaning device based on light beam transform |
| CN112609218A (en) * | 2020-11-18 | 2021-04-06 | 中国兵器科学研究院宁波分院 | Preparation method of super-hydrophobic micro-arc oxidation composite membrane |
| CN112609218B (en) * | 2020-11-18 | 2023-10-17 | 中国兵器科学研究院宁波分院 | Preparation method of super-hydrophobic micro-arc oxidation composite film |
| CN113001026A (en) * | 2021-03-15 | 2021-06-22 | 西安交通大学 | Method for preparing super-hydrophobic surface based on femtosecond laser and temperature control aging comprehensive regulation |
| CN113001026B (en) * | 2021-03-15 | 2022-04-05 | 西安交通大学 | Method for preparing super-hydrophobic surface based on femtosecond laser and temperature control aging comprehensive regulation |
| CN116265595A (en) * | 2021-12-17 | 2023-06-20 | 中国科学院长春光学精密机械与物理研究所 | Corrosion-resistant aluminum alloy and preparation method thereof |
| CN116265595B (en) * | 2021-12-17 | 2023-09-05 | 中国科学院长春光学精密机械与物理研究所 | Corrosion-resistant aluminum alloy and preparation method thereof |
| CN115008018A (en) * | 2022-04-28 | 2022-09-06 | 西安交通大学 | Method for preparing durable super-hydrophobic surface through femtosecond laser composite rare earth nano modification |
| CN115786652A (en) * | 2023-01-09 | 2023-03-14 | 中国科学院长春光学精密机械与物理研究所 | Intrinsic super-hydrophobic material, preparation method and application thereof |
| CN116140938A (en) * | 2023-03-06 | 2023-05-23 | 广东工业大学 | Processing method of macro-micro composite array wear-resistant super-hydrophobic surface and metal piece |
| CN116140938B (en) * | 2023-03-06 | 2024-01-30 | 广东工业大学 | Processing method of macro-micro composite array wear-resistant super-hydrophobic surface and metal piece |
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Effective date of registration: 20210218 Address after: 528225 Room 608, R & D workshop, building 11, Lihe science and technology industrial center, 99 Taoyuan East Road, Shishan town, Nanhai District, Foshan City, Guangdong Province Patentee after: Kington laser technology (Foshan) Co.,Ltd. Address before: 430068 No. 28 Nanli Road, Hongshan District, Wuhan City, Hubei Province Patentee before: HUBEI University OF TECHNOLOGY |