CN104911598A - Method for preparing zinc alloy super-hydrophobic and self-cleaning surface by using ultra-fast laser - Google Patents
Method for preparing zinc alloy super-hydrophobic and self-cleaning surface by using ultra-fast laser Download PDFInfo
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Abstract
The present invention relates to a method for preparing a zinc alloy super-hydrophobic and self-cleaning surface by using ultra-fast laser, and belongs to the technical field of metal substrate surface modification. According to the method, a zinc alloy sample is subjected to polishing pretreatment, the sample surface is cleaned respectively with deionized water and dehydrated alcohol, then blow drying or air drying is performed, a laser processing technology is utilized, ultra-fast laser is used to adjust the relevant process parameters, the sample is subjected to a surface treatment, countless micro structures are processed on the sample surface, and after completing the processing, the processed sample is placed into an electric heating drying box to bake so as to obtain the zinc alloy super-hydrophobic surface having the micron-scale porous structure, wherein the surface has characteristics of self-cleaning function, excellent friction resistance, and excellent corrosion resistance. The preparation method of the present invention has characteristics of simple process, convenient operation, high efficiency, low energy consumption, low cost, green environmental protection, and easy industrial application achieving.
Description
Technical field:
The invention belongs to metal surface properties modification technology, relate to the preparation method of bionic super-hydrophobic self-cleaning surface on zinc alloy matrix, more particularly, the present invention relates to a kind of method utilizing ultrafast laser to prepare zinc alloy 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 pollutent 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, automotive industry, bridge railway.But zinc alloy corrosion stability is poor, easily causes foundry goods aging and deform, even breaking, so annual corrosion causes the loss of zinc alloy to account for the 10-20% of annual production, therefore the protection against corrosion of zinc alloy just seems particularly important.Super-hydrophobic automatic cleaning concept is that the corrosion-resistance treatment of zinc alloy 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 wetting property of metallic substance is a very important feature, the microtexture of material and the wetting property of this material surface of moiety joint effect in metallic surface.Prepare super-hydrophobic method on the metal material to have a lot, typical method has: anonizing, chemical medicinal liquid etch, electrochemical etching+chemical corrosion method, laser ablation+chemical corrosion method.Anonizing 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 microstructure.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 microstructure 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 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.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; 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, 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 zinc alloy super-hydrophobic automatic cleaning surface of environmental protection.Method of the present invention can obtain steady in a long-term, contact angle in various size and difform zinc 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 zinc alloy super-hydrophobic automatic cleaning surface, described method comprises the steps:
Step one, carries out polishing pre-treatment by pending zinc alloy surface, obtains the zinc alloy sample after surface finish;
Step 2, zinc 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 zinc alloy sample surfaces cold wind to be dried up or room temperature is dried naturally, obtain clean zinc 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 zinc 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 zinc alloy sample of the surface obtained described in step 3 after laser processing process and toasts, and namely obtains described zinc 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, 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.
Further preferably, the wavelength of described ultrafast laser is 800nm, and the pulsewidth of described ultrafast laser is 90fs-550fs.
Again further preferably, the pulsewidth of described ultrafast laser is 90fs, and described single pulse energy is 30 μ J-60 μ J, and described laser scanning speed is 60mm/s-80mm/s.
Again further preferably, the pulsewidth of described ultrafast laser is 550fs, and described single pulse energy is 40 μ J-60 μ J, and described laser scanning speed is 40mm/s-60mm/s.
Preferably, the repetition rate of described ultrafast laser is 10kHz, 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 50%RH, and temperature is 100 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 at described zinc 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 zinc alloy sample surfaces should flood by described deionized water, at room temperature continuous wash 30 minutes.
Present invention also offers the zinc alloy super-hydrophobic automatic cleaning surface prepared by aforesaid method, described surface has micron-sized cell texture.
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 163.8 °, and minimum roll angle is 3.8 °, 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 processing parameter of the inventive method easily controls, be easy to realize industrial 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 work-ing life of zinc alloy.
Accompanying drawing explanation
Fig. 1 (a), (b) are respectively contact angle schematic diagram, the roll angle schematic diagram on the zinc alloy 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 on the zinc alloy super-hydrophobic automatic cleaning surface 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 zinc alloy 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 zinc alloy 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 zinc alloy 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 zinc alloy 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 zinc alloy 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 zinc alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 4 prepares.
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.
A kind of ultrafast laser of the present invention prepares the method on zinc alloy super-hydrophobic automatic cleaning surface, with reference to nature biotechnology material as design basis, zinc alloy surface imitates 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 zinc alloy super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending zinc 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 at described zinc alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the zinc alloy sample after surface finish;
Step 2, zinc 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, room temperature is dried naturally, obtains clean zinc 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 zinc alloy sample surfaces obtained described in step 2, described laser apparatus pulsewidth is 90fs, and single pulse energy is 30 μ J, and repetition rate is 10kHz, and described laser scanning utilizes X-Y scanning galvanometer system, makes laser beam with the speed of 60mm/s zinc alloy 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 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 126mmx126mm,
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 zinc alloy super-hydrophobic automatic cleaning surface.
Employing resistivity is the deionized water of 18.25 megaohms, utilize the contact angle of the zinc alloy super-hydrophobicity self-cleaning surface obtained described in the test of optical contact angle surface interfacial tension survey meter, 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 table 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.
Zinc alloy super-hydrophobic automatic cleaning that the present embodiment prepares surface, its stereoscan photograph as shown in Figure 5, the micron-sized cell texture of its surface presentation.
The zinc 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 zinc alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares is 158.1 ° with the contact angle of water, and roll angle is 7.7 °, and test result is in table 1.
Embodiment 2
A kind of method utilizing ultrafast laser to prepare zinc alloy super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending zinc 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 at described zinc alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the zinc alloy sample after surface finish;
Step 2, zinc 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, after cleaning up, dry up with cold wind, obtain clean zinc alloy sample;
Step 3, adopt ultrafast laser, laser wavelength is 800nm, laser scanning manufacturing is carried out to the clean zinc 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 60 μ J, repetition rate is 10kHz, described laser scanning routing motion workplatform, the clean zinc 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 80mm/s, by zinc alloy 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, can along X, Y, Z three-dimensional direction movings by computer control, and sample work range is 150mmx150mm,
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 200 DEG C of conditions, constant temperature toasts 4 hours, obtains described zinc alloy super-hydrophobic automatic cleaning surface.
Employing resistivity is the deionized water of 18.25 megaohms, the identical testing method of above-described embodiment 1 is adopted to utilize contact angle, the roll angle of the zinc alloy super-hydrophobicity self-cleaning surface obtained described in the test of optical contact angle surface interfacial tension survey meter, drop volume is 3 microlitres, probe temperature is 25.5 DEG C, and humidity is 19.5%RH.
Zinc alloy super-hydrophobic automatic cleaning that the present embodiment prepares surface, its stereoscan photograph as shown in Figure 6, the micron-sized cell texture of its surface presentation.
The zinc 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 zinc alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares is 155.0 ° with the contact angle of water, and roll angle is 8.9 °, and test result is in table 1.
Embodiment 3
A kind of method utilizing ultrafast laser to prepare zinc alloy super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending zinc 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 at described zinc alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the zinc alloy sample after surface finish;
Step 2, zinc 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, after cleaning up, room temperature is dried naturally, obtains clean zinc alloy sample;
Step 3, adopt ultrafast laser, laser wavelength is 800nm, carry out laser scanning manufacturing to the clean zinc 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 40 μ J, repetition rate is 10kHz, and described laser scanning utilizes X-Y scanning galvanometer system, makes laser beam with the speed of 40mm/s zinc alloy 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 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 126mmx126mm,
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 53%RH, and temperature is that under 100 DEG C of conditions, constant temperature toasts 8 hours, obtains described zinc alloy super-hydrophobic automatic cleaning surface.
Employing resistivity is the deionized water of 18.25 megaohms, the identical testing method of above-described embodiment 1 is adopted to utilize contact angle, the roll angle of the zinc alloy super-hydrophobicity self-cleaning surface obtained described in the test of optical contact angle surface interfacial tension survey meter, because the zinc 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, and humidity is 19.5%RH.
Zinc alloy super-hydrophobic automatic cleaning that the present embodiment prepares surface, its stereoscan photograph as shown in Figure 7, the micron-sized cell texture of its surface presentation.
The zinc 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 zinc alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares is 162.6 ° with the contact angle of water, and roll angle is 6.6 °, and test result is in table 1.
Embodiment 4
A kind of method utilizing ultrafast laser to prepare zinc alloy super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by pending zinc 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 at described zinc alloy surface, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the zinc alloy sample after surface finish;
Step 2, zinc 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, after cleaning up, room temperature is dried naturally, obtains clean zinc alloy sample;
Step 3, adopt femto-second laser, laser wavelength is 800nm, laser processing is carried out to the clean zinc 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 60 μ J, repetition rate is 10kHz, described laser scanning routing motion workplatform, the clean zinc 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 zinc alloy 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, can along X, Y, Z three-dimensional direction movings by computer control, and sample work range is 150mmx150mm,
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 zinc alloy super-hydrophobic automatic cleaning surface.
Adopt contact angle, the roll angle on the zinc alloy super-hydrophobic automatic cleaning surface obtained described in the identical testing method of above-described embodiment 1 and test condition test.
The zinc alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares, its stereoscan photograph as shown in Figure 8.The micron-sized cell texture of its surface presentation.
The zinc 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 zinc alloy super-hydrophobic automatic cleaning surface that the present embodiment prepares is 163.8 ° with the contact angle of water, and roll angle is 3.8 °, and test result is in table 1.
The zinc 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 | 158.1 | 7.7 |
| Embodiment 2 | 155.0 | 8.9 |
| Embodiment 3 | 162.6 | 6.6 |
| Embodiment 4 | 163.8 | 3.8 |
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 zinc 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 zinc alloy surface, obtains the zinc alloy sample after surface finish;
Step 2, zinc 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 zinc alloy sample surfaces cold wind to be dried up or room temperature is dried naturally, obtain clean zinc 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 zinc 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 zinc alloy sample of the surface obtained described in step 3 after laser processing process and toasts, and namely obtains described zinc 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 zinc alloy super-hydrophobic automatic cleaning surface as claimed in claim 1, is characterized in that: the repetition rate of ultrafast laser described in step 3 is 10kHz-200kHz, and described pulsewidth is 30fs-10ps.
3. a kind of method utilizing ultrafast laser to prepare zinc alloy super-hydrophobic automatic cleaning surface as claimed in claim 2, is characterized in that: the pulsewidth of described ultrafast laser is 80fs-800fs.
4. a kind of method utilizing ultrafast laser to prepare zinc alloy super-hydrophobic automatic cleaning surface as claimed in claim 3, it is characterized in that: the wavelength of described ultrafast laser is 800nm, the pulsewidth of described ultrafast laser is 90fs-550fs.
5. a kind of method utilizing ultrafast laser to prepare zinc alloy super-hydrophobic automatic cleaning surface as claimed in claim 4, it is characterized in that: the pulsewidth of described ultrafast laser is 90fs, described single pulse energy is 30 μ J-60 μ J, and described laser scanning speed is 60mm/s-80mm/s.
6. a kind of method utilizing ultrafast laser to prepare zinc alloy super-hydrophobic automatic cleaning surface as claimed in claim 4, it is characterized in that: the pulsewidth of described ultrafast laser is 550fs, described single pulse energy is 40 μ J-60 μ J, and described laser scanning speed is 40mm/s-60mm/s.
7. a kind of method utilizing ultrafast laser to prepare zinc alloy super-hydrophobic automatic cleaning surface as claimed in claim 6, it is characterized in that: the repetition rate of described ultrafast laser is 10kHz, described single pulse energy is 60 μ J, and described laser scanning speed is 60mm/s.
8. a kind of method utilizing ultrafast laser to prepare zinc 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.
9. a kind of method utilizing ultrafast laser to prepare zinc alloy super-hydrophobic automatic cleaning surface as claimed in claim 8, it is characterized in that: the humidity in described fixed 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 zinc alloy super-hydrophobic automatic cleaning surface prepared by the method described in any one of claim 1-9, described surface has micron-sized cell texture.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106925895A (en) * | 2017-03-16 | 2017-07-07 | 上海理工大学 | Based on the micro-machined glassy carbon electrode surface coarsening preparation method of ultra-short pulse laser |
| 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 |
| CN109127331A (en) * | 2018-09-28 | 2019-01-04 | 江苏理工学院 | A kind of method that infrared laser prepares super-hydrophobic zinc alloy surface |
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| CN101219506A (en) * | 2008-01-07 | 2008-07-16 | 江苏大学 | Laser production method for metal base ultra-hydrophobicity micro-structure surface |
| CN104498957A (en) * | 2014-12-17 | 2015-04-08 | 中国航空工业集团公司北京航空制造工程研究所 | Preparation method of super-hydrophobic micro-nano structure on titanium alloy surface |
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| CN101219506A (en) * | 2008-01-07 | 2008-07-16 | 江苏大学 | Laser production method for metal base ultra-hydrophobicity micro-structure surface |
| CN104498957A (en) * | 2014-12-17 | 2015-04-08 | 中国航空工业集团公司北京航空制造工程研究所 | Preparation method of super-hydrophobic micro-nano structure on titanium alloy surface |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106925895A (en) * | 2017-03-16 | 2017-07-07 | 上海理工大学 | Based on the micro-machined glassy carbon electrode surface coarsening preparation method of ultra-short pulse laser |
| 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 |
| CN109127331A (en) * | 2018-09-28 | 2019-01-04 | 江苏理工学院 | A kind of method that infrared laser prepares super-hydrophobic zinc alloy surface |
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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 |