CN104907702A - Method for preparing stainless steel super-hydrophobic self-cleaning surface with short pulse laser light - Google Patents
Method for preparing stainless steel super-hydrophobic self-cleaning surface with short pulse laser light Download PDFInfo
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Abstract
The invention relates to a method for preparing a stainless steel super-hydrophobic self-cleaning surface with short pulse laser light, and belongs to the technical field of metal substrate surface modification. The method comprises the following steps: performing polishing pretreatment on a stainless steel sample; cleaning the surface of the sample in an ultrasonic cleaning instrument filled with deionized water, and drying the cleaned sample with cold air or drying in the air; regulating relevant process parameters with a short pulse laser by means of a laser processing technology, and performing surface treatment on the sample; processing a plurality of microstructures on the surface of the sample; after the completion of processing, putting the processed sample into an electric heating drying oven for baking to obtain the stainless steel super-hydrophobic surface with a micron-sized papillary structure on the surface. The surface has a self-cleaning function and excellent friction resistance and corrosion resistance. The preparation method has the advantages of simple process, convenience in operation, high efficiency, low energy consumption, low cost, environmental friendliness and easiness in implementation of industrial application.
Description
Technical field
The invention belongs to metallic substrate surface technical field of modification, relate to a kind of stainless steel substrate process for modifying surface, more particularly, the present invention relates to a kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface.
Background technology
A lot of plant flowers leaf surface is had to have very outstanding self-cleaning function in the middle of nature, the petal surface of the plants such as such as rose just has very outstanding super-hydrophobicity, these performances material antiseptic erosion, anti-oxidant etc. in have application prospect widely, cause the application of metal surface wellability in association area thus.The wellability of metal material is the very important feature in metal surface, and the microstructure of material and constituent joint effect the wellability of material surface.The essence of super hydrophobic surface has extremely low wellability, and will obtain low wellability and depend primarily on two Fundamentals, i.e. the micro-geometry of the surface of solids and surface chemical composition.Judge surface hydrophobicity or low wetability usually use instant contact angle or roll angle as decision criteria: when water droplet on a solid surface, when contact angle is greater than 90 °, be called hydrophobic surface; Its contact angle, more than 150 °, when roll angle is less than 10 °, is then called as super hydrophobic surface.
304 stainless steel materials, due to the performance of its outstanding anticorrosive property and other excellences, are widely used in machinery industry, medical industry, the industries such as electric industry.304 stainless steel super hydrophobic surface technology have very important effect in the middle of advanced manufacturing industry and national defense industry.Process 304 stainless steel surfaces by laser technology, make 304 stainless steel surfaces form self-cleaning super hydrophobic surface, very there is application prospect.
The method preparing metal super-hydrophobic surface has a lot, and main method constructs the coarse micro-structural of one deck at material surface, in this layer of micro-structural, then add the material of low-surface-energy.The main stream approach forming coarse micro-structural has anodizing, nanosecond material coating method, chemical etching method, laser ablation method etc.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 laser processing method is in the consistent micro-structural of material surface form height, improves stainless surface topography and realize the requirement of material surface super-hydrophobic automatic cleaning.Compare chemical corrosion method, the speed of not only processing is fast, does not also need to add one deck decorative layer at material surface, greatly increases working (machining) efficiency, and without any environmental pollution.Relative to femtosecond laser processing stainless steel material, working (machining) efficiency is high and cost is low, is applicable to heavy industrialization application.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, urgently develop a kind of technique simple, preparation efficiency is high, is applicable to commercial application, not producing any environmental pollution and disposablely realize 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 stainless steel super-hydrophobic automatic cleaning of environmental protection surface and preparation method thereof.Method of the present invention can obtain steady in a long-term, contact angle in various sizes and difform surface of stainless steel and be greater than 150 °, the roll angle super hydrophobic surface that is less than 10 °, and simultaneously obtained surface also has outstanding rub resistance decay resistance.
The object of the invention is to be achieved through the following technical solutions: a kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface, described method comprises the steps:
Step one, carries out polishing pretreatment by pending stainless steel surfaces, obtains the stainless steel sample after surface finish;
Step 2, is placed on the stainless steel sample after surface finish described in step one in the ultrasonic washing instrument filling deionized water and cleans, and after cleaning up, to be dried up by described stainless steel sample surfaces cold wind or room temperature is dried naturally, obtains clean stainless steel 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 stainless steel 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 stainless steel sample of the surface obtained described in step 3 after Laser Processing process and toasts, and namely obtains described stainless steel 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, the stainless steel described in technique scheme is preferably 304 stainless steels.
Further, in technique scheme, the repetition rate of short-pulse laser described in step 3 is 70kHz-1MHz, and described pulsewidth is 10ns-500ns.
Further preferably, the pulsewidth of described short-pulse laser is 20ns-240ns.
Further preferably, the wavelength of described short-pulse laser is 1064nm, and described pulsewidth is 240ns, and described single pulse energy weight range is 0.35mJ-0.65mJ.
Still more preferably, described single pulse energy is 0.61mJ.
Further preferably, the wavelength of described short-pulse laser is 1064nm, and described pulsewidth is 20ns, and described single pulse energy weight range is 0.1mJ-0.15mJ.
Still more preferably, the repetition rate of described short-pulse laser is 100kHz-550kHz, and the sweep speed of described short-pulse laser is 200mm/s-1100mm/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 constant temperature and humidity electrically heated drying cabinet is 45%RH, and temperature is 100 DEG C, and the time of baking is 8 hours.
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 stainless steel surfaces, 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 stainless steel sample surfaces should flood by described deionized water, at room temperature continuous wash 30 minutes.
Present invention also offers the stainless steel super-hydrophobic automatic cleaning surface prepared by said method, described surface has micron order papillary structure.
Compared with prior art, the inventive method has the following advantages:
(1) the stainless steel surfaces Maximum Contact angle utilizing the inventive method to prepare can reach 166.1 °, and minimum roll angle is 0.5 °, 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 stainless steel surfaces 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 stainless steel metal surface property adopting the inventive method to prepare is stablized, and possesses excellent self-cleaning function, considerably increases the stainless scope of application.
Accompanying drawing explanation
Fig. 1 (a), (b) are respectively contact angle schematic diagram, the roll angle schematic diagram on the stainless steel super-hydrophobic automatic cleaning surface that the embodiment of the present invention 1 utilizes short-pulse laser to prepare;
Fig. 2 (c), (d) are respectively contact angle schematic diagram, the roll angle schematic diagram on the stainless steel super-hydrophobic automatic cleaning surface that the embodiment of the present invention 2 utilizes short-pulse laser to prepare;
Fig. 3 (e), (f) are respectively contact angle schematic diagram, the roll angle schematic diagram on the stainless steel super-hydrophobic automatic cleaning surface that the embodiment of the present invention 3 utilizes short-pulse laser to prepare;
Fig. 4 (g), (h) are respectively contact angle schematic diagram, the roll angle schematic diagram on the stainless steel super-hydrophobic automatic cleaning surface that the embodiment of the present invention 4 utilizes short-pulse laser to prepare;
Fig. 5 is the scanning electron microscope (SEM) photograph on the stainless steel super-hydrophobic automatic cleaning surface that the embodiment of the present invention 1 utilizes short-pulse laser to prepare;
Fig. 6 is the scanning electron microscope (SEM) photograph on the stainless steel super-hydrophobic automatic cleaning surface that the embodiment of the present invention 2 utilizes short-pulse laser to prepare;
Fig. 7 is the scanning electron microscope (SEM) photograph on the stainless steel super-hydrophobic automatic cleaning surface that the embodiment of the present invention 3 utilizes short-pulse laser to prepare;
Fig. 8 is the scanning electron microscope (SEM) photograph on the stainless steel super-hydrophobic automatic cleaning surface that the embodiment of the present invention 4 utilizes short-pulse laser to prepare.
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 stainless steel super-hydrophobic automatic cleaning surface of the present invention, with reference to nature biotechnology material as design basis, 304 stainless steel surfaces imitate 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 stainless steel super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by 304 stainless steel polishings, 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 stainless steel surfaces, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the stainless steel sample after surface finish;
Step 2, stainless steel 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, room temperature is dried naturally, obtains clean stainless steel 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 stainless steel sample surfaces obtained described in step 2, described laser instrument pulsewidth is 240ns, and single pulse energy is 0.61mJ, and repetition rate is 99kHz, and described laser scanning utilizes X-Y scanning galvanometer system, makes laser beam with the speed of 1336.5mm/s stainless steel 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 45%RH, and temperature is that under 100 DEG C of conditions, constant temperature toasts 8 hours, obtains described stainless steel super-hydrophobic automatic cleaning surface.
Employing resistivity is the deionized water of 18.25 megaohms, utilize the contact angle of the stainless steel super-hydrophobicity self-cleaning surface obtained described in the test of optical contact angle surface interfacial tension measuring instrument, 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 stage Z axis to make sample surfaces drop to original position, because the stainless steel surfaces 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.
Stainless steel 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 stainless steel 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 stainless steel super-hydrophobic automatic cleaning surface that the present embodiment prepares is 166.1 ° with the contact angle of water, and roll angle is 0.5 °, and test result is in table 1.
Embodiment 2
A kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by 304 stainless steel polishings, 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 stainless steel surfaces, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the stainless steel sample after surface finish;
Step 2, stainless steel 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, after cleaning up, dry up with cold wind, obtain clean stainless steel 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 stainless steel sample surfaces obtained described in step 2, described laser instrument pulsewidth is 240ns, single pulse energy is 0.40mJ, and repetition rate is 149kHz, and described laser scanning utilizes polygon prism system, make laser beam with the speed of 2011.5mm/s stainless steel 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 stainless steel 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 4 hours, obtains described stainless steel super-hydrophobic automatic cleaning surface.
Adopt contact angle, the roll angle of the stainless steel surfaces obtained described in the test of above-described embodiment 1 identical method of testing.
Stainless steel 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 stainless steel 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 stainless steel super-hydrophobic automatic cleaning surface that the present embodiment prepares is 157.1 ° with the contact angle of water, and roll angle is 6.6 °, and test result is in table 1.
Embodiment 3
A kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by 304 stainless steel polishings, 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 auxiliary diameter to be 200mm, and 1000 object SiC waterproof abrasive papers carry out polishing at described stainless steel surfaces, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the stainless steel sample after surface finish;
Step 2, stainless steel 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, after cleaning up, room temperature is dried naturally, obtains clean stainless steel sample;
Step 3, adopt short-pulse laser, laser wavelength is 1064nm, carry out laser scanning manufacturing to the clean stainless steel 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 0.11mJ, repetition rate is 550kHz, and described laser scanning utilizes X-Y scanning galvanometer system, makes laser beam with the speed of 1100mm/s stainless steel 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 126mmx 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 52%RH, and temperature is that under 200 DEG C of conditions, constant temperature toasts 6 hours, obtains described stainless steel super-hydrophobic automatic cleaning surface.
Adopt contact angle, the roll angle on the stainless steel super-hydrophobic automatic cleaning surface obtained described in the test of above-described embodiment 1 identical method of testing.
Stainless steel 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 stainless steel 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 stainless steel super-hydrophobic automatic cleaning surface that the present embodiment prepares is 153 ° with the contact angle of water, and roll angle is 4.0 °, and test result is in table 1.
Embodiment 4
A kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface of the present embodiment, comprises following concrete steps:
Step one, by 304 stainless steel polishings, 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 stainless steel surfaces, and polishing scope is 100cm
2, polishing time 10 minutes, obtains the stainless steel sample after surface finish;
Step 2, stainless steel 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, after cleaning up, room temperature is dried naturally, obtains clean stainless steel sample;
Step 3, adopt short-pulse laser, laser wavelength is 1064nm, Laser Processing is carried out to the clean stainless steel 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 0.15mJ, repetition rate is 100kHz, described laser scanning routing motion workbench, the clean stainless steel 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 pulse laser light beam along x, y, z three-dimensional direction moving, speed is 200mm/s, by stainless steel 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 48%RH, and temperature is that under 250 DEG C of conditions, constant temperature toasts 2 hours, obtains described stainless steel super-hydrophobic automatic cleaning surface.
Adopt contact angle, the roll angle on the stainless steel super-hydrophobic automatic cleaning surface obtained described in the test of above-described embodiment 1 identical method of testing.
The stainless steel surfaces that the present embodiment prepares, its stereoscan photograph as shown in Figure 8.The micron-sized papillary structure of its surface presentation.
The stainless steel 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 stainless steel super-hydrophobic automatic cleaning surface that the present embodiment prepares is 160.8 ° with the contact angle of water, and roll angle is 8.6 °, and test result is in table 1.
The contact angle on stainless steel super-hydrophobic automatic cleaning surface 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 | 0.5 |
| Embodiment 2 | 157.1 | 6.6 |
| Embodiment 3 | 153 | 4.0 |
| Embodiment 4 | 160.8 | 8.6 |
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 stainless steel super-hydrophobic automatic cleaning surface, it is characterized in that: described method comprises the steps:
Step one, carries out polishing pretreatment by pending stainless steel surfaces, obtains the stainless steel sample after surface finish;
Step 2, is placed on the stainless steel sample after surface finish described in step one in the ultrasonic washing instrument filling deionized water and cleans, and after cleaning up, to be dried up by described stainless steel sample surfaces cold wind or room temperature is dried naturally, obtains clean stainless steel 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 stainless steel 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 stainless steel sample of the surface obtained described in step 3 after Laser Processing process and toasts, and namely obtains described stainless steel 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 stainless steel super-hydrophobic automatic cleaning surface as claimed in claim 1, is characterized in that: described stainless steel is 304 stainless steels.
3. a kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface as claimed in claim 1 or 2, is characterized in that: the repetition rate of short-pulse laser described in step 3 is 70kHz-1MHz, and described pulsewidth is 10ns-500ns.
4. a kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface as claimed in claim 3, is characterized in that: the pulsewidth of described short-pulse laser is 20ns-240ns.
5. a kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface as claimed in claim 4, it is characterized in that: the wavelength of described short-pulse laser is 1064nm, described pulsewidth is 240ns, and described single pulse energy weight range is 0.35mJ-0.65mJ.
6. a kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface as claimed in claim 4, it is characterized in that: the wavelength of described short-pulse laser is 1064nm, described pulsewidth is 20ns, and described single pulse energy weight range is 0.1mJ-0.15mJ.
7. a kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface as claimed in claim 5, is characterized in that: described single pulse energy is 0.61mJ.
8. a kind of method utilizing short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface as claimed in claim 6, it is characterized in that: the repetition rate of described short-pulse laser is 100kHz-550kHz, the sweep speed of described short-pulse laser is 200mm/s-1100mm/s.
9. a kind of method utilizing short-pulse laser to prepare stainless steel 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 short-pulse laser to prepare stainless steel super-hydrophobic automatic cleaning surface as claimed in claim 9, it is characterized in that: the humidity in described constant temperature and humidity electrically heated drying cabinet is 45%RH, temperature is 100 DEG C, and the time of baking is 8 hours.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105149793A (en) * | 2015-09-24 | 2015-12-16 | 温州启昊激光科技有限公司 | Laser art-sculpture process for stainless steel plate |
| CN106984902A (en) * | 2017-04-20 | 2017-07-28 | 湖北工业大学 | A kind of utilization pulse laser prepares the preparation method of hull steel super hydrophobic surface |
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| CN108515269A (en) * | 2018-04-03 | 2018-09-11 | 北京航空航天大学 | A method of directly preparing stainless steel super-hydrophobic automatic cleaning surface using picosecond laser |
| CN109676245A (en) * | 2018-09-30 | 2019-04-26 | 湖北工业大学 | A method of super hydrophilic glass surface is prepared using pulse laser |
| CN111979557A (en) * | 2020-08-05 | 2020-11-24 | 中国人民解放军陆军装甲兵学院 | Method for cleaning stainless steel surface by using pulse laser to form micro-nano structure layer |
| WO2021082262A1 (en) * | 2019-10-31 | 2021-05-06 | 山东大学 | Composite preparation method of nanosecond laser ablation and chemical thermal decomposition of super-hydrophobic micro-nano structure on stainless steel surface |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105149793A (en) * | 2015-09-24 | 2015-12-16 | 温州启昊激光科技有限公司 | Laser art-sculpture process for stainless steel plate |
| CN105149793B (en) * | 2015-09-24 | 2016-10-19 | 浙江启昊科技有限公司 | Stainless steel materials laser skill carver's skill |
| CN106984902A (en) * | 2017-04-20 | 2017-07-28 | 湖北工业大学 | A kind of utilization pulse laser prepares the preparation method of hull steel super hydrophobic surface |
| CN107175409A (en) * | 2017-05-26 | 2017-09-19 | 苏州菲镭泰克激光技术有限公司 | The three-dimensional laser fine machining system and method for crisp and hard material |
| CN108515269A (en) * | 2018-04-03 | 2018-09-11 | 北京航空航天大学 | A method of directly preparing stainless steel super-hydrophobic automatic cleaning surface using picosecond laser |
| CN109676245A (en) * | 2018-09-30 | 2019-04-26 | 湖北工业大学 | A method of super hydrophilic glass surface is prepared using pulse laser |
| WO2021082262A1 (en) * | 2019-10-31 | 2021-05-06 | 山东大学 | Composite preparation method of nanosecond laser ablation and chemical thermal decomposition of super-hydrophobic micro-nano structure on stainless steel surface |
| CN111979557A (en) * | 2020-08-05 | 2020-11-24 | 中国人民解放军陆军装甲兵学院 | Method for cleaning stainless steel surface by using pulse laser to form micro-nano structure layer |
| CN111979557B (en) * | 2020-08-05 | 2022-09-13 | 中国人民解放军陆军装甲兵学院 | Method for cleaning stainless steel surface by using pulse laser to form micro-nano structure layer |
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