CN104907698A - Method for manufacturing zinc alloy super-hydrophobic self-cleaning surface through short-pulse lasers - Google Patents
Method for manufacturing zinc alloy super-hydrophobic self-cleaning surface through short-pulse lasers Download PDFInfo
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- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
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Abstract
The invention relates to a method for manufacturing a zinc alloy super-hydrophobic self-cleaning surface through short-pulse lasers, and belongs to the technical field of metal base material surface modification. According to the method, firstly, polishing preprocessing is carried out on a zinc alloy sample; then, the surface of the sample is cleaned through deionized water and anhydrous ethanol, and the surface of the sample is blown dry or is aired dry; the laser processing technology is used, the surface of the sample is processed by adjusting relative process parameters through short-pulse lasers, innumerable microstructures are processed in the surface of the sample, the processed sample is placed into an electrically heated drying oven to be baked after processing, and the zinc alloy super-hydrophobic surface with micron-size papillary structures is obtained. The surface has the self-cleaning function and is excellent in friction resistance and corrosion resistance. The method for manufacturing is simple in process, convenient to operate, high in efficiency, little in energy consumption, low in cost and environmentally friendly, and industrial application is easy to implement.
Description
Technical field:
The invention belongs to metal surface properties modification technology, relate to the preparation method on super-hydrophobic automatic cleaning surface on kirsite matrix, more particularly, the present invention relates to a kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface.
Background technology:
Natural biology is through the evolution of the survival of the fittest in 1 years, and the various form of optimization, configuration, structure and material, show diversified functional character, becomes system existence bad border to optimum adaptation and hight coordinate.The profoundness that contains of occurring in nature biology attracts the mankind and constantly explores, learns and imitate, and in the hope of solving the various problems run in human being's production life, making human society to higher direction and more profoundly to stride forward.Nature is we provide a large amount of super-hydrophobic, self-cleaning animals and plants surface examples, as surfaces such as lotus leaf, Rice Leaf, watermark leg, the wing of moth, the feathers of birds.This body structure surface has the function of super-hydrophobic non-infiltration, automatically cleaning, anti-adhesion, in addition stealthy, the function such as drag reduction, noise reduction in addition.Along with modern material technology and the development testing detection technique, scientists finds that these animals and plants natural have super-hydrophobic and self-cleaning function, reach self-cleaning object when pollutant and water loading are easy to landing in its surface, the man power and material that same surface then needs at substantial be cleaned.Therefore prepare super hydrophobic surface on the metal material more and more to be paid close attention to, people thirst for ultra-hydrophobicity to be applied to industrial production, especially on zinc alloy surface, prepare super-hydrophobic performance.Usual regulation, is greater than 90 ° by water droplet at the contact angle CA on surface and is called hydrophobic surface, when contact angle CA be greater than 150 °, the roll angle TA surface that is less than 10 ° is called super hydrophobic surface.
Zinc alloy casting performance is good, can the precision part of complex-shaped, the thin-walled of die casting, its piece surface can carry out various decorative processing, as plating, japanning, anodic oxidation, painted, polishing etc., has been widely used in the fields such as shipping industry, auto industry, bridge railway.But kirsite corrosion stability is poor, easily causes foundry goods aging and deform, even breaking, so annual corrosion causes the loss of kirsite to account for the 10-20% of annual production, therefore the anticorrosion of kirsite just seems particularly important.Super-hydrophobic automatic cleaning concept is that the corrosion-resistance treatment of kirsite matrix provides new thinking.Process zinc alloy surface by laser technology, make zinc alloy surface form the etch-proof super hydrophobic surface of rub resistance, there is very large application prospect.
The wellability of metal material is a very important feature, the microstructure of material and the wellability of this material surface of constituent joint effect in metal surface.Prepare super-hydrophobic method on the metal material to have a lot, typical method has: anodizing, chemical medicinal liquid etch, electrochemical etching+chemical corrosion method, laser ablation+chemical corrosion method.Anodizing is exactly immerse in the middle of boiling water by porous oxidation alumina gel, then by distillation material and aluminium stone or silica mixing, 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.And other preparation methods need the chemical agent of special equipment or harsh processing conditions and indispensable costliness, high pollution mostly, by putting in chemical reagent by sample bubble, its surface is made to form pit shape micro-structural.These methods are comparatively large to the pollution of environment, and operating procedure is complicated.Super hydrophobic surface is prepared in zinc alloy material; by a kind of without chemical medicinal liquid, pollution-free laser processing method simple to operate for use; the micro-structural that material surface form height is consistent improves zinc alloy surface pattern; realize the requirement of material surface super-hydrophobic automatic cleaning, for raising the efficiency, energy-conservation, protection of the environment etc. is all significant.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 minute yardstick 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 carcinogen toluene, easily cause environmental pollution.Application number be 201410657627.4 patent discloses a kind of ultra-hydrophobic high sticking metal surface and preparation method thereof, prepared the periodicity micro nano structure of class rose surface microstructure in metal surface by high power psec or femtosecond laser, again by the finishing of low free energy material, achieve the preparation of ultra-hydrophobic high sticking metal surface, the method adopts low-surface energy substance effects on surface to carry out necessary modification, and working (machining) efficiency is low; 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 Theoretical Design, 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 large-scale production completely.
In sum, explore and a kind of there is simple, that quick, cost is low, working (machining) efficiency is high super-hydrophobic corrosion resistant Zinc alloy based surface preparation method, be the technical work that an existing theory value has again application value realistic, this technological invention brings subversive change even likely to super-hydrophobic this field of corrosion-resistant automatically cleaning.
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 kirsite super-hydrophobic automatic cleaning surface of environmental protection.Method of the present invention can obtain steady in a long-term, contact angle in various sizes and difform zinc alloy material surface and be greater than 150 °, the roll angle super hydrophobic surface that is less than 10 °, and simultaneously obtained surface also has outstanding self-cleaning performance.
The object of the invention is to be achieved through the following technical solutions: a kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface, described method comprises the steps:
Step one, carries out polishing pretreatment by pending zinc alloy surface, obtains the kirsite sample after surface finish;
Step 2, kirsite 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 kirsite sample surfaces cold wind to be dried up or room temperature is dried naturally, obtain clean kirsite sample;
Step 3, utilizes laser processing technology, carries out laser scanning process, process countless micro-structurals at sample surfaces after adopting short-pulse laser to regulate relevant technological parameter to the clean kirsite 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 limits of galvanometer system, track while scan and process velocity control and setting by computer program;
Or described laser scanning adopts polygon prism system to carry out beam flying, the speed of polygon prism scanning is 1m/s-800m/s, and the break-make of laser and the sweep limits of polygon prism 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 constant temperature and humidity electrically heated drying cabinet by the kirsite sample of the surface obtained described in step 3 after Laser Processing process and toasts, and namely obtains described kirsite super-hydrophobic automatic cleaning surface;
Wherein, the short-pulse laser wavelength described in step 3 is less than 1550nm, and mean power is less than 80W, and described laser processing parameter is: pulsewidth is greater than 10ns, and single pulse energy is less than 1.03mJ.
Further, in technique scheme, the repetition rate of short-pulse laser described in step 3 is 70kHz-1000kHz, and described pulsewidth is 10ns-500ns.
Further preferably, the wavelength of described short-pulse laser is 1064nm, and pulsewidth is 20ns-240ns, and single pulse energy is 0.1mJ-0.9mJ, and described laser scanning speed is 1000mm/s-2000mm/s.
Still more preferably, described short-pulse laser pulsewidth is 240ns, and described single pulse energy is 0.6mJ-0.9mJ, and described laser scanning speed is 1000mm/s-1500mm/s.
Still more preferably, described short-pulse laser pulsewidth is 20ns, and described single pulse energy is 0.10mJ-0.12mJ, and described laser scanning speed is 800mm/s-1200mm/s.
Again further preferably, the repetition rate of described short-pulse laser is 70kHz-600kHz.
Again further preferably, the repetition rate of described short-pulse laser is 70kHz, and described single pulse energy is 0.857mJ, and described laser scanning speed is 1032mm/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.
Further, polishing pretreatment 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 polishing at described zinc alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes.
Further, in technique scheme, described in step 2, the supersonic frequency of ultrasonic cleaning instrument is 40kHz, and described deionized water resistivity is 18.25 megaohms, and kirsite sample surfaces should flood by described deionized water, at room temperature continuous wash 30 minutes.
Still more preferably, the humidity in described constant temperature and humidity electrically heated drying cabinet is 50%RH, and temperature is 100 DEG C, and the time of baking is 4 hours.
Present invention also offers the kirsite super-hydrophobic automatic cleaning surface prepared by said method, described surface has micron-sized papillary structure.
Compared with prior art, the inventive method has the following advantages:
(1) the zinc alloy surface Maximum Contact angle utilizing the inventive method to prepare can reach 166.1 °, and minimum roll angle is 6.4 °, 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 zinc 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 technological parameter of the inventive method easily controls, be easy to realize commercial Application.
(3) the super-hydrophobic zinc alloy metal surface property adopting the inventive method to prepare is stablized, and possesses the rub resistance of self-cleaning function and excellence and corrosion-resistant energy performance, considerably increases the service life of kirsite.
Accompanying drawing explanation
Fig. 1 (a), (b) are respectively contact angle schematic diagram, the roll angle schematic diagram on the kirsite super-hydrophobic automatic cleaning surface that the embodiment of the present invention 1 prepares;
Fig. 2 (c), (d) are respectively contact angle schematic diagram, the roll angle schematic diagram of the super thin automatically cleaning water surface of kirsite that the embodiment of the present invention 2 prepares;
Fig. 3 (e), (f) are respectively contact angle schematic diagram, the roll angle schematic diagram on the kirsite super-hydrophobic automatic cleaning surface that the embodiment of the present invention 3 prepares;
Fig. 4 (g), (h) are respectively contact angle schematic diagram, the roll angle schematic diagram on the kirsite super-hydrophobic automatic cleaning surface that the embodiment of the present invention 4 prepares;
Fig. 5 is the scanning electron microscope (SEM) photograph on the kirsite super-hydrophobic automatic cleaning surface that the embodiment of the present invention 1 prepares;
Fig. 6 is the scanning electron microscope (SEM) photograph on the kirsite super-hydrophobic automatic cleaning surface that the embodiment of the present invention 2 prepares;
Fig. 7 is the scanning electron microscope (SEM) photograph on the kirsite super-hydrophobic automatic cleaning surface that the embodiment of the present invention 3 prepares;
Fig. 8 is the scanning electron microscope (SEM) photograph on the kirsite super-hydrophobic automatic cleaning surface that the embodiment of the present invention 4 prepares.
Detailed description of the invention
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 conventional method.
A kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface of the present invention, with reference to nature biotechnology material as design basis, zinc alloy surface imitates the architectural feature of nature biotechnology composite fine structure distribution, design surface structure.
Embodiment 1
A kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending kirsite 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 polishing at described zinc alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the kirsite sample after surface finish;
Step 2, kirsite sample ultrasonic washing instrument after surface finish described in step one is cleaned, ultrasonic washing instrument ultrasonic frequency is 40kHz, sample surfaces is flooded by 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 kirsite sample;
Step 3, adopt short-pulse laser, laser wavelength is 1064nm, carries out laser scanning manufacturing, process countless micro-structurals at sample surfaces to the clean kirsite sample surfaces obtained described in step 2, described laser instrument pulsewidth is 240ns, and single pulse energy is 0.857mJ, and repetition rate is 70kHz, and described laser scanning utilizes X-Y scanning galvanometer system, makes laser beam with the speed of 1032mm/s kirsite sample surfaces 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 limits 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 registration is made to reach 1%-99% in y direction, workbench reverses, the described sample range of work 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 50%RH, and temperature is that under 100 DEG C of conditions, constant temperature toasts 4 hours, obtains described kirsite super-hydrophobic automatic cleaning surface.
Employing resistivity is the deionized water of 18.25 megaohms, utilize the contact angle of the kirsite super-hydrophobicity self-cleaning surface obtained described in the test of optical contact angle surface interfacial tension measuring instrument, roll angle, carrying out contact angle, when roll angle is measured, employing accesses method and measures, 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 stage Z axis to make sample surfaces drop to original position, drop volume is 6 microlitres, probe temperature is 25.5 DEG C, humidity is 19.5%RH.
Kirsite super-hydrophobic automatic cleaning that the present embodiment prepares surface, its stereoscan photograph as shown in Figure 5, the micron-sized papillary structure of its surface presentation.
The kirsite 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 kirsite super-hydrophobic automatic cleaning surface that the present embodiment prepares is 166.1 ° 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 short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending kirsite 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 polishing at described zinc alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the kirsite sample after surface finish;
Step 2, kirsite sample ultrasonic washing instrument after surface finish described in step one is cleaned, ultrasonic washing instrument ultrasonic frequency is 40kHz, sample surfaces is flooded by 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 kirsite sample;
Step 3, adopt short-pulse laser, laser wavelength is 1064nm, carries out laser scanning manufacturing, process countless micro-structurals at sample surfaces to the clean kirsite sample surfaces obtained described in step 2, described laser instrument pulsewidth is 240ns, single pulse energy is 0.6mJ, and repetition rate is 100kHz, and described laser scanning utilizes polygon prism system, make laser beam with the speed of 1475mm/s kirsite sample surfaces described in ablation line by line, the sample range of work is 100cm
2, described polygon prism system is by the polygonal prism of High Rotation Speed, electric drive amplifier and field lens composition, the line sweep scope of described polygon prism system and speed are undertaken controlling and setting by computer controller, the signal that described computer controller provides is by described drive amplification circuit drives polygon prism, upwards laser beam deflection can be realized at one-dimensional square, combine with motion platform simultaneously, realize the movement of other direction, wherein kirsite 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 registration is made to reach 1%-99% in y direction,
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 40%RH, and temperature is that under 100 DEG C of conditions, constant temperature toasts 8 hours, obtains described kirsite super-hydrophobic automatic cleaning surface.
Adopt contact angle, the roll angle on the kirsite super-hydrophobic automatic cleaning surface obtained described in the identical method of testing of above-described embodiment 1 and test condition test.
Kirsite 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 kirsite 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 kirsite super-hydrophobic automatic cleaning surface that the present embodiment prepares is 153.7 ° with the contact angle of water, and roll angle is 9.6 °, and test result is in table 1.
Embodiment 3
A kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending kirsite 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 polishing at described zinc alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the kirsite sample after surface finish;
Step 2, kirsite 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 by 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 kirsite sample;
Step 3, adopt short-pulse laser, laser wavelength is 1064nm, carry out laser scanning manufacturing to the clean kirsite sample surfaces obtained described in step 2, process countless micro-structurals at sample surfaces, the pulsewidth of described laser instrument is 20ns, single pulse energy is 0.12mJ, repetition rate is 500kHz, and described laser scanning utilizes X-Y scanning galvanometer system, makes laser beam with the speed of 950mm/s kirsite sample surfaces 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 limits 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 registration is made to reach 1%-99% in y direction, workbench reverses, the described sample range of work 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 48%RH, and temperature is that under 200 DEG C of conditions, constant temperature toasts 4 hours, obtains described kirsite super-hydrophobic automatic cleaning surface.
Adopt contact angle, the roll angle on the kirsite super-hydrophobic automatic cleaning surface obtained described in the identical method of testing of above-described embodiment 1 and test condition test.
Kirsite 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 kirsite 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 kirsite super-hydrophobic automatic cleaning surface that the present embodiment prepares is 150.3 ° with the contact angle of water, and roll angle is 7.8 °, and test result is in table 1.
Embodiment 4
A kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending kirsite 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 polishing at described zinc alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the kirsite sample after surface finish;
Step 2, kirsite sample ultrasonic washing instrument after surface finish described in step one is cleaned, ultrasonic washing instrument ultrasonic frequency is 40kHz, sample surfaces is flooded by 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 kirsite sample;
Step 3, adopt short-pulse laser, laser wavelength is 1064nm, Laser Processing is carried out to the clean kirsite sample surfaces obtained described in step 2, countless micro-structurals is processed at sample surfaces, the pulsewidth of described laser instrument is 20ns, single pulse energy is 0.10mJ, repetition rate is 600kHz, described laser scanning routing motion workbench, the clean kirsite sample obtained described in step 2 is fixed on motion workbench, 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 1140mm/s, by kirsite sample surfaces described in ablation 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 control by computer, can along X, Y, Z three-dimensional direction moving, and the sample range of work 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 250 DEG C of conditions, constant temperature toasts 2 hours, obtains described kirsite super-hydrophobic automatic cleaning surface.
Adopt contact angle, the roll angle on the kirsite super-hydrophobic automatic cleaning surface obtained described in the identical method of testing of above-described embodiment 1 and test condition test.
The kirsite super-hydrophobic automatic cleaning surface that the present embodiment prepares, its stereoscan photograph as shown in Figure 8.The micron-sized papillary structure of its surface presentation.
The kirsite 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 kirsite super-hydrophobic automatic cleaning surface that the present embodiment prepares is 153.8 ° with the contact angle of water, and roll angle is 6.4 °, and test result is in table 1.
The kirsite 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 | 166.1 | 8.9 |
| Embodiment 2 | 153.7 | 9.6 |
| Embodiment 3 | 150.3 | 7.8 |
| Embodiment 4 | 153.8 | 6.4 |
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 short-pulse laser to prepare the method on kirsite super-hydrophobic automatic cleaning surface, it is characterized in that: described method comprises the steps:
Step one, carries out polishing pretreatment by pending zinc alloy surface, obtains the kirsite sample after surface finish;
Step 2, kirsite 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 kirsite sample surfaces cold wind to be dried up or room temperature is dried naturally, obtain clean kirsite sample;
Step 3, utilizes laser processing technology, carries out laser scanning process, process countless micro-structurals at sample surfaces after adopting short-pulse laser to regulate relevant technological parameter to the clean kirsite 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 limits of galvanometer system, track while scan and process velocity control and setting by computer program;
Or described laser scanning adopts polygon prism system to carry out beam flying, the speed of polygon prism scanning is 1m/s-800m/s, and the break-make of laser and the sweep limits of polygon prism 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 constant temperature and humidity electrically heated drying cabinet by the kirsite sample of the surface obtained described in step 3 after Laser Processing process and toasts, and namely obtains described kirsite super-hydrophobic automatic cleaning surface;
Wherein, the short-pulse laser wavelength described in step 3 is less than 1550nm, and mean power is less than 80W, and described laser processing parameter is: pulsewidth is greater than 10ns, and single pulse energy is less than 1.03mJ.
2. a kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface as claimed in claim 1, is characterized in that: the repetition rate of short-pulse laser described in step 3 is 70kHz-1000kHz, and described pulsewidth is 10ns-500ns.
3. a kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface as claimed in claim 2, it is characterized in that: the wavelength of described short-pulse laser is 1064nm, pulsewidth is 20ns-240ns, single pulse energy is 0.1mJ-0.9mJ, and described laser scanning speed is 1000mm/s-2000mm/s.
4. a kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface as claimed in claim 3, it is characterized in that: the pulsewidth of described short-pulse laser is 240ns, described single pulse energy is 0.6mJ-0.9mJ, and described laser scanning speed is 1000mm/s-1500mm/s.
5. a kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface as claimed in claim 3, it is characterized in that: described short-pulse laser pulsewidth is 20ns, described single pulse energy is 0.10mJ-0.12mJ, and described laser scanning speed is 800mm/s-1200mm/s.
6. a kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface as described in claim 4 or 5, is characterized in that: the repetition rate of described short-pulse laser is 70kHz-600kHz.
7. a kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface as claimed in claim 6, it is characterized in that: the repetition rate of described short-pulse laser is 70kHz, described single pulse energy is 0.857mJ, and described laser scanning speed is 1032mm/s.
8. a kind of method utilizing short-pulse laser to prepare kirsite 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.
9. a kind of method utilizing short-pulse laser to prepare kirsite super-hydrophobic automatic cleaning surface as claimed in claim 8, it is characterized in that: the humidity in described constant temperature and humidity electrically heated drying cabinet is 50%RH, temperature is 100 DEG C, and the time of baking is 4 hours.
10. the kirsite super-hydrophobic automatic cleaning surface prepared by the method described in any one of claim 1-9, described surface has micron-sized papillary structure.
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