CN104911520B - A kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser - Google Patents
A kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser Download PDFInfo
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Abstract
The present invention relates to a kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser, belong to metallic substrate surface technical field of modification.Aluminum alloy sample is polished pretreatment by this method first, then cold wind is dried up or dried after being utilized respectively deionized water and washes of absolute alcohol sample surfaces, recycle laser processing technology, sample is surface-treated after regulating the technological parameter of correlation using short-pulse laser, countless micro-structurals is processed in sample surfaces, after machining, sample after processing is put into electrically heated drying cabinet and toasted, obtaining surface has the aluminium alloy super-hydrophobic automatic cleaning surface of micron order papillary structure, the surface possesses and has extraordinary ultra-hydrophobicity and excellent self-cleaning function.The preparation method technique of the present invention is simple, and easy to operate, efficiency high, less energy consumption, cost is low, green, it is easy to accomplish commercial Application.
Description
Technical field：
The invention belongs to metallic substrate surface technical field of modification, is related to super-hydrophobic automatic cleaning surface on alloy matrix aluminum
Preparation method, it is more particularly related to which a kind of prepare aluminium alloy super-hydrophobic automatic cleaning surface using short-pulse laser
Method.
Background technology：
In nature, the currently used many science and technology of the mankind are all that inspiration and inspiration are obtained from the Nature
, super hydrophobic surface is a kind of extremely common phenomenon in the Nature.Such as the surface of lotus leaf just have very strong hydrophobicity and
Self-cleaning function.The hydrophobicity of lotus leaf surface is mainly studied enlightenment caused by the mankind super-hydrophobic, and self-cleaning is then super thin
The result of water, therefore prepare super hydrophobic surface on the metal material and get growing concern for.Because super hydrophobic surface has
There is special wetting characteristics, it is formed special characteristic on its surface, can reach that clean surfaces are net and erosion-resisting characteristic,
All have broad application prospects in many aspects.People are thirsted for ultra-hydrophobicity application in the industrial production, especially in aluminium
The surface of ultra-hydrophobicity is prepared on alloy substrate.Generally regulation, super hydrophobic surface refer to water contact angle CA be more than 150 °,
Roll angle TA is less than 10 ° of surface.When water droplet is less than 10 degree in the roll angle that super hydrophobic surface contacts with water, the super-hydrophobic table
Face has self-cleaning function, and the surface with self-cleaning function can adsorb pollutant and by its band during drop rolls
From surface, so as to reach the purpose of self-cleaning.
In recent years, ultra-hydrophobicity application is also come more extensive, the super-hydrophobic preparation of metal material, especially aluminium alloy
The preparation of super hydrophobic surface has been to be concerned by more and more people.Aluminium alloy because it has low-density, excellent heat conduction and electric conductivity,
Higher intensity, and turn into important structural material, it is widely used in the fields such as Aero-Space, auto industry.Fortune
Directly change aluminum alloy surface performance with the method for laser, preparing the super hydrophobic surface with micro-nano-scale double-decker will be
One promising technical research.The wellability of metal material is a critically important feature of metal surface, the microcosmic knot of material
Structure and constituent joint effect the wellability of material surface.The preparation method of super hydrophobic surface is prepared on metal very
More, typical method and approach mainly have：Chemical medicinal liquid etch, electrochemical etching+chemical corrosion method, laser ablation+chemistry
Etch etc., but the immersion of these technology generally existing chemical medicinal liquids, can produce chemical contamination, complex steps, it is time-consuming and
Shortcoming, these shortcomings such as preparation efficiency is low all limit its practical application.For example, the patent of Application No. 201310079939.7
A kind of preparation method of aluminium alloy bionic super-hydrophobic surface is disclosed, first with washes of absolute alcohol aluminium alloy, is then closed in aluminium
Gold surface is laser machined, and processes the cratering structure of countless minute yardsticks in specimen surface, then sample is immersed into chemistry and carved
Lose in solution, the shape characteristic of specimen surface is changed, but this method does not break through at the surface of traditional chemical etching completely
Science and engineering skill, using also further make use of chemical etching after laser processing technology, and the aluminium alloy after chemical etching is tried
Sample is put into the toluene solution containing DTS and modified, and gradually forms the film of low-surface-energy on its surface, the handling process is answered
It is miscellaneous, and high poison carcinogen toluene has been used, easily cause environmental pollution.In order to effectively obtain super hydrophobic surface, it is also necessary to
Necessary modification is carried out to surface with low-surface energy substance, the efficiency of processing is not high.For example, Application No.
201410657627.4 patent discloses a kind of ultra-hydrophobic high sticking metal surface and preparation method thereof, passes through high power psec
Or femtosecond laser prepares the periodicity micro nano structure of class rose surface microstructure in metal surface, then pass through low free energy
The surface modification of material, the preparation of ultra-hydrophobic high sticking metal surface is realized, this method is using low-surface energy substance to surface
Necessary modification is carried out, processing efficiency is low.Also have recently domestic and foreign scholars using femto-second laser one-step method prepare it is super-hydrophobic from
The surfaces such as the platinum of cleaning, titanium, copper.For example, the patent application of Application No. 201410788477.0 discloses a kind of titanium alloy table
The preparation method of the super-hydrophobic micro-nano structure in face, ultrasonic wave first is carried out with acetone and absolute alcohol respectively to titanium alloy sample and cleaned,
Obtain the clean titanium alloy sample in surface；Then the titanium alloy sample surface clean to surface carries out femtosecond laser lithography process,
One step obtains the titanium alloy sample with grating type or well type or the super-hydrophobic micro-nano structure surface of blind round hole type.Application No.
200910021923.4 patent disclose a kind of method of preparing metal surface superhydrophobic microstructure by femto-second laser, although these
Point-device microstructural surfaces can be processed using femto-second laser, but this simple method can not cover femtosecond
Laser inherent defect, such as the defects of price and its costliness, processing efficiency are low, processing environment is harsh.
In summary, the super-hydrophobic table of large area is prepared on aluminum alloy materials by efficient method simple to operation
Face, and the new technology of any chemical contamination is not produced, have great importance for improving efficiency, energy-conservation, environmental protection etc..
The content of the invention
For the aluminum alloy surface for preparing in the prior art is super-hydrophobic, difficulties and problems existing for self-cleaning function, this hair
Bright purpose is to provide that a kind of process is simple, high in machining efficiency, and cost is low, the system on green aluminium alloy multifunction surface
Preparation Method.Using the aluminum alloy surface prepared of the method not only work(with super-hydrophobic function but also with self-cleaning of the present invention
Energy.
The method that the present invention is combined using short-pulse laser scanning aluminum alloy surface and simple Post isothermal treatment, system
It is standby go out a kind of surface of super-hydrophobic automatic cleaning.The sharpest edges of the inventive method are that whole process without using any chemical medicinal liquid, is gathered around
There is low cost, efficiency high, pollution-free.
The purpose of the present invention is achieved through the following technical solutions：It is super thin that one kind using short-pulse laser prepares aluminium alloy
The method of water self-cleaning surface, methods described comprise the following steps：
Step 1, pending aluminum alloy surface is polished pretreatment, obtains the aluminum alloy sample after the polishing of surface；
Step 2, the aluminum alloy sample after surface polishing described in step 1 is placed on to the ultrasonic wave cleaning for filling deionized water
Cleaned in instrument, then recycle ethanol cleaning, after cleaning up, by the aluminum alloy sample surface with cold wind dry up or room temperature from
So dry, obtain the aluminum alloy sample of cleaning；
Step 3, using laser processing technology, regulated using short-pulse laser after the technological parameter of correlation to step
The clean aluminium alloy sample surfaces obtained described in two carry out laser scanning processing, and countless micro-structurals is processed in sample surfaces；
The laser scanning carries out light beam scanning using galvanometer system, and the speed of vibration mirror scanning is 0.1mm/s-30m/s, swashs
The break-make of the light and scanning range of galvanometer system, scanning track and process velocity are controlled and set by computer program；
Or the laser scanning carries out light beam scanning using polygon prism system, the speed of polygon prism scanning is 1m/s-800m/
S, the break-make of laser and the scanning range of polygon prism system, scanning track and process velocity are controlled and set by computer program
It is fixed；
Or the laser scanning is realized using motion platform system, and light beam is fixed, the motion of sample relative beam, platform fortune
Dynamic speed is 0.1mm/s-3m/s, and break-make, platform movement locus and the speed of laser are controlled and set by computer program；
Step 4, aluminum alloy sample of the surface obtained described in step 3 after Laser Processing is handled is put into constant temperature perseverance
Toasted in wet electrically heated drying cabinet, that is, obtain the aluminium alloy 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, the laser
Machined parameters are：Pulsewidth is more than 10ns, and single pulse energy is less than 1.03mJ.
Further, the aluminium alloy described in above-mentioned technical proposal is preferably 2a12 aluminium alloys.
Further, the repetition rate of short-pulse laser described in step 3 is 70kHz- in above-mentioned technical proposal
1000kHz, the pulsewidth are 10ns-500ns.
It is further preferred that the wavelength of the short-pulse laser is 1064nm, the repetition frequency of the short-pulse laser
Rate is 100kHz-500kHz, and pulsewidth 20ns-240ns, the single pulse energy is 0.1mJ-0.6mJ.
It is further preferred that the pulsewidth is 240ns, the single pulse energy is 0.35mJ-0.6mJ, and the laser is swept
It is 1000mm/s-2000mm/s to retouch speed.
It is further preferred that the pulsewidth is 20ns, the single pulse energy is 0.1mJ-0.12mJ, the laser scanning
Speed is 1000mm/s-2500mm/s.
It is further preferred that the single pulse energy is 0.6mJ, the repetition rate of the short-pulse laser is
100kHz。
Further, the pressure described in above-mentioned technical proposal step 4 in electrically heated drying cabinet is normal atmospheric pressure, humidity
For 40%-60%RH, temperature is 100 DEG C -250 DEG C, and time of the sample baking is 2-8 hours, in the electrically heated drying cabinet
Temperature error be ± 1 DEG C.
Further, the polishing pretreatment in above-mentioned technical proposal described in step 1 uses power to turn for 370W, abrasive disk
The pre-grinding test sample of gold phase machine that speed is 450 revs/min, lap diameter is 230mm, polishing preprocessing process need to aid in a diameter of
200mm, the SiC waterproof abrasive papers of 1000 mesh are processed by shot blasting that polishing scope is 100cm in the aluminum alloy surface2, polishing time
10 minutes.
Further, in above-mentioned technical proposal described in step 2 be cleaned by ultrasonic instrument supersonic frequency be 40kHz, it is described go from
Sub- water resistance rate is 18.25 megaohms, and the deionized water should flood aluminum alloy sample surface, and continuous wash 30 is divided at room temperature
Clock.
It is further preferred that the humidity in the constant temperature and humidity electrically heated drying cabinet is 55%RH, temperature is 200 DEG C, is dried
The roasting time is 4 hours.
Present invention also offers the aluminium alloy super-hydrophobic automatic cleaning surface being prepared by the above method, the surface has
Micron-sized papillary structure.
Compared with prior art, the inventive method has advantages below：
(1) using the aluminum alloy surface Maximum Contact angle that the inventive method is prepared up to 157.3 °, minimum roll angle
For 7.3 °, therefore there is extraordinary ultra-hydrophobicity.
(2) preparation method technique of the invention is simple, and easy to operate, efficiency high, less energy consumption, cost is low, overcomes completely
Tradition is using chemical reagent etching aluminum alloy surface or still needs to enter one using low-surface energy substance again after the completion of Laser Processing
The defects of walking modification of surfaces, it is green, any chemical reagents coating is not used, and the technological parameter of the inventive method is easily controlled
System, it is easy to accomplish commercial Application.
(3) the super-hydrophobic aluminum alloy metal surface stable performance being prepared using the inventive method, is possessed self-cleaning
Function, considerably increase the use range of aluminium alloy.
Brief description of the drawings
Fig. 1 (a), (b) are respectively that the aluminium alloy that the embodiment of the present invention 1 is prepared using short-pulse laser is super-hydrophobic from clear
Clean surface connect be intended to feeler show, roll angle schematic diagram；
Fig. 2 (c), (d) are respectively that the aluminium alloy that the embodiment of the present invention 2 is prepared using short-pulse laser is super-hydrophobic from clear
Contact angle schematic diagram, the roll angle schematic diagram on clean surface；
Fig. 3 (e), (f) are respectively that the aluminium alloy that the embodiment of the present invention 3 is prepared using short-pulse laser is super-hydrophobic from clear
Contact angle schematic diagram, the roll angle schematic diagram on clean surface；
Fig. 4 (g), (h) are respectively that the aluminium alloy that the embodiment of the present invention 4 is prepared using short-pulse laser is super-hydrophobic from clear
Contact angle schematic diagram, the roll angle schematic diagram on clean surface；
Fig. 5 is sweeping for the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 1 is prepared using short-pulse laser
Retouch electron microscope；
Fig. 6 is sweeping for the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 2 is prepared using short-pulse laser
Retouch electron microscope；
Fig. 7 is sweeping for the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 3 is prepared using short-pulse laser
Retouch electron microscope；
Fig. 8 is sweeping for the aluminium alloy super-hydrophobic automatic cleaning surface that the embodiment of the present invention 4 is prepared using short-pulse laser
Retouch electron microscope.
Embodiment
In order to be better understood from the present invention, technical scheme is done below in conjunction with specific embodiment further in detail
Introduce.
Experimental method used in following embodiments is conventional method unless otherwise specified.
A kind of preparation method on aluminium alloy super-hydrophobic automatic cleaning surface of the present invention, make with reference to nature biotechnology material
For design basis, the architectural feature that natural imitation circle Biocomposite material fine structure is distributed in 2a12 aluminum alloy surfaces, if
Count surface texture.
Embodiment 1
A kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser of the present embodiment, including it is following
Specific steps：
Step 1, pending 2a12 aluminium alloys being polished, be 370W from power, lap speed is 450 revs/min,
Lap diameter is 230mm pre-grinding test sample of gold phase machine, and polishing process needs to aid in the SiC water sands of a diameter of 200mm, 1000 mesh
Paper is processed by shot blasting that polishing scope is 100cm in the aluminum alloy surface2, polishing time 10 minutes, after obtaining surface polishing
Aluminum alloy sample；
Step 2, the aluminum alloy sample after surface polishing described in step 1 is cleaned with ultrasonic washing instrument, ultrasonic wave is clear
It is 40kHz to wash instrument ultrasonic frequency, floods sample surfaces at room temperature with the deionized water that resistivity is 18.25 megaohms, continuously
Cleaning 30 minutes, is then cleaned with ethanol again, after cleaning up, room temperature naturally dry, obtains the aluminum alloy sample of cleaning；
Step 3, using short-pulse laser, laser wavelength 1064nm, the clean aluminum obtained described in step 2 is closed
Golden sample surfaces carry out laser scanning manufacturing, and countless micro-structurals is processed in sample surfaces；The laser pulsewidth is
240ns, single pulse energy 0.375mJ, repetition rate 160kHz, the laser scanning utilize X-Y scanning galvanometer systems, made
Laser beam is with aluminum alloy sample surface described in the ablation line by line of 1430mm/s speed；The galvanometer system is swept by X-Y optics
Head, electric drive amplifier, optical reflecting lens and field lens composition are retouched, the scanning range and speed of the galvanometer system, line are swept
Retouch and be controlled and set by computer with Surface scan path, the signal that the computer provides passes through drive amplification circuit drives light
Probe is learned, so as to be moved in the x-direction relative to laser beam in the deflection of X-Y plane control laser beam, sample, passes through control
Translational speed and laser pulse repetition frequency, its pulse matching degree is set to reach 1%-99%, after completing movement, then it is single in the y-direction
Enter step by step, by controlling step distance, its light beam registration is reached 1%-99%, workbench reversion, the sample in y directions
The range of work is 126mm x 126mm；
Sample after processing is put into electrically heated drying cabinet and dried after step 3 laser machines by step 4, sample
It is roasting, depressed in air pressure for normal atmospheric, humidity 55%RH, constant temperature toasts 8 hours under the conditions of temperature is 100 DEG C, obtains described
Aluminium alloy super-hydrophobic automatic cleaning surface.
Resistivity is used to be tested for 18.25 megaohms of deionized water using optical contact angle surface interfacial tension measuring instrument
The contact angle of the obtained aluminium alloy super-hydrophobicity self-cleaning surface, roll angle：When carrying out contact angle, rolling angular measurement：
Using method measurement is accessed, the suspension drop of volume needed for formation under liquid feeding syringe needle, adjusting the Z axis of example platform makes sample surfaces
Rise, when sample surfaces contact with the drop bottom hung under liquid feeding syringe needle, drop is just transferred to sample table from liquid feeding syringe needle
Face, then sample surfaces is dropped to original position by adjusting sample stage Z axis again and measure, due to the aluminium being prepared
Alloy surface ultra-hydrophobicity is excellent, and 3-8 microlitres of water droplet can not adhere to, so drop volume is 9 microlitres, test temperature is
25.5 DEG C, humidity 19.5%RH.
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment is prepared, its stereoscan photograph is as shown in figure 5, its table
Micron-sized papillary structure is presented in face.
The aluminium alloy super-hydrophobic automatic cleaning surface and the contact angle schematic diagram of water such as Fig. 1 (a) institutes that the present embodiment is prepared
Show, shown in roll angle schematic diagram such as Fig. 1 (b).
The aluminium alloy super-hydrophobic automatic cleaning surface and the contact angle of water that the present embodiment is prepared are 156.9 °, and roll angle is
7.3 °, test result is shown in Table 1.
Embodiment 2
A kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser of the present embodiment, including it is following
Specific steps：
Step 1, pending 2a12 aluminium alloys being polished, be 370W from power, lap speed is 450 revs/min,
Lap diameter is 230mm pre-grinding test sample of gold phase machine, and polishing process needs to aid in the SiC water sands of a diameter of 200mm, 1000 mesh
Paper is processed by shot blasting that polishing scope is 100cm in the aluminum alloy surface2, polishing time 10 minutes, after obtaining surface polishing
Aluminum alloy sample；
Step 2, the aluminum alloy sample after surface polishing described in step 1 is cleaned with ultrasonic washing instrument, ultrasonic wave is clear
It is 40kHz to wash instrument ultrasonic frequency, floods sample surfaces with the deionized water that resistivity is 18.25 megaohms, at room temperature, continuously
Cleaning 30 minutes, ethanol cleaning is recycled, after cleaning up, is dried up with cold wind, obtains the aluminum alloy sample of cleaning；
Step 3, using short-pulse laser, laser wavelength 1064nm, the clean aluminum obtained described in step 2 is closed
Golden sample surfaces carry out laser scanning manufacturing, countless micro-structurals are processed in sample surfaces, the laser pulsewidth is
240ns, single pulse energy 0.6mJ, repetition rate 100kHz, the laser scanning utilize X-Y scanning galvanometer systems, make to swash
Light beam is with aluminum alloy sample surface described in the ablation line by line of 1666.7mm/s speed；The galvanometer system is swept by X-Y optics
Head, electric drive amplifier, optical reflecting lens and field lens composition are retouched, the scanning range and speed of the galvanometer system, line are swept
Retouch and be controlled and set by computer with Surface scan path, the signal that the computer provides passes through drive amplification circuit drives light
Probe is learned, so as to be moved in the x-direction relative to laser beam in the deflection of X-Y plane control laser beam, sample, passes through control
Translational speed and laser pulse repetition frequency, its pulse matching degree is set to reach 1%-99%, after completing movement, then it is single in the y-direction
Enter step by step, by controlling step distance, its light beam registration is reached 1%-99%, workbench reversion, the sample in y directions
The range of work is 126mm x 126mm；
Sample after processing is put into electrically heated drying cabinet and dried after step 3 laser machines by step 4, sample
It is roasting, depressed in air pressure for normal atmospheric, humidity 54%RH, constant temperature toasts 4 hours under the conditions of temperature is 200 DEG C, obtains described
Aluminium alloy super-hydrophobicity self-cleaning surface.
It is super-hydrophobic from clear using the aluminium alloy obtained described in the identical method of testing of above-described embodiment 1 and test condition test
The contact angle on clean surface, roll angle.
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment is prepared, its stereoscan photograph is as shown in fig. 6, its table
Micron-sized papillary structure is presented in face.
The aluminium alloy super-hydrophobic automatic cleaning surface and the contact angle schematic diagram of water such as Fig. 2 (c) institutes that the present embodiment is prepared
Show, shown in roll angle schematic diagram such as Fig. 2 (d).
The aluminum alloy surface and the contact angle of water that the present embodiment is prepared are 157.3 °, and roll angle is 8.8 °, test knot
Fruit is shown in Table 1.
Embodiment 3
A kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser of the present embodiment, including it is following
Specific steps：
Step 1, pending 2a12 aluminium alloys being polished, be 370W from power, lap speed is 450 revs/min,
Lap diameter is 230mm pre-grinding test sample of gold phase machine, and polishing process needs to aid in the SiC water sands of a diameter of 200mm, 1000 mesh
Paper is processed by shot blasting that polishing scope is 100cm in the aluminum alloy surface2, polishing time 10 minutes, after obtaining surface polishing
Aluminum alloy sample；
Step 2, the aluminum alloy sample after surface polishing described in step 1 is cleaned with ultrasonic washing instrument, ultrasonic wave is clear
It is 40kHz to wash instrument ultrasonic frequency, floods sample surfaces with the deionized water that resistivity is 18.25 megaohms, at room temperature, continuously
Cleaning 30 minutes, recycle ethanol cleaning, after cleaning up, room temperature naturally dry, obtain the aluminum alloy sample of cleaning；
Step 3, using short-pulse laser, laser wavelength 1064nm, the clean aluminum obtained described in step 2 is closed
Golden sample surfaces carry out laser scanning manufacturing, countless micro-structurals are processed in sample surfaces, the pulsewidth of the laser is
20ns, single pulse energy 0.12mJ, repetition rate 500kHz, the laser scanning utilize polygon prism system, make laser beam
With aluminum alloy sample surface described in the ablation line by line of 2500mm/s speed, the sample range of work is 100cm2；More ribs
Mirror system is made up of the polygonal prism, electric drive amplifier and field lens rotated at a high speed, the line scanning of the polygon prism system
Scope and speed are controlled and set by computer controller, and the signal that the computer controller provides is put by the driving
Big circuit drives polygon prism, can realize laser beam deflection in one-dimensional square, while is combined with motion platform, realize another
The movement in direction, wherein aluminum alloy sample are moved in the x-direction relative to laser beam, by controlling translational speed and laser pulse
Repetition rate, its pulse matching degree is set to reach 1%-99%, after completing movement, then single step stepping in the y-direction, by controlling stepping
Distance, its light beam registration is set to reach 1%-99% in y directions；
Sample after processing is put into electrically heated drying cabinet and dried after step 3 laser machines by step 4, sample
It is roasting, depressed in air pressure for normal atmospheric, humidity 40%RH, constant temperature toasts 2 hours under the conditions of temperature is 250 DEG C, obtains described
Aluminium alloy super-hydrophobicity self-cleaning surface.
It is super-hydrophobic from clear using the aluminium alloy obtained described in the identical method of testing of above-described embodiment 1 and test condition test
The contact angle on clean surface, roll angle.
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment is prepared, its stereoscan photograph is as shown in fig. 7, its table
Micron-sized papillary structure is presented in face.
The aluminium alloy super-hydrophobic automatic cleaning surface and the contact angle schematic diagram of water such as Fig. 3 (e) institutes that the present embodiment is prepared
Show, shown in roll angle schematic diagram such as Fig. 3 (f).
The aluminium alloy super-hydrophobic automatic cleaning surface and the contact angle of water that the present embodiment is prepared are 155.3 °, and roll angle is
8.3 °, test result is shown in Table 1.
Embodiment 4
A kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser of the present embodiment, including it is following
Specific steps：
Step 1, pending 2a12 aluminium alloys are polished, polishing is 370W from power, lap speed for 450 turns/
Point, lap diameter is 230mm pre-grinding test sample of gold phase machine, and polishing process needs to aid in a diameter of 200mm, the SiC of 1000 mesh
Waterproof abrasive paper is processed by shot blasting that polishing scope is 100cm in the aluminum alloy surface2, polishing time 10 minutes, obtain surface throwing
Aluminum alloy sample after light；
Step 2, the aluminum alloy sample after surface polishing described in step 1 is cleaned with ultrasonic washing instrument, ultrasonic wave is clear
It is 40kHz to wash instrument ultrasonic frequency, floods sample surfaces with the deionized water that resistivity is 18.25 megaohms, at room temperature, continuously
Cleaning 30 minutes, recycle ethanol cleaning, after cleaning up, room temperature naturally dry, obtain the aluminum alloy sample of cleaning；
Step 3, using short-pulse laser, laser wavelength 1064nm, the clean aluminum obtained described in step 2 is closed
Golden sample surfaces are laser machined, and countless micro-structurals is processed in sample surfaces, and the pulsewidth of the laser is 20ns, single
Pulse energy is 0.1mJ, repetition rate 500kHz, the laser scanning routing motion workbench, will be obtained described in step 2
To clean aluminium alloy sample be fixed on motion workbench on, using lens by laser beam focusing on to the sample, make
The surface of sample is along x, y, z three-dimensional direction moving, speed relative to the focusing etching hot spot of the pulse laser light beam
1000mm/s, by aluminum alloy sample surface described in ablation line by line, realize the etching of micro-nano structure；The motion platform list
Member is three-dimensional servo precision mobile platform, and the scope of the platform movement, speed, direction control by computer, can be along X, Y, Z
Three-dimensional direction moving, the sample range of work are 150mm x 150mm；
Sample after processing is put into electrically heated drying cabinet and dried after step 3 laser machines by step 4, sample
It is roasting, depressed in air pressure for normal atmospheric, humidity 60%RH, constant temperature toasts 2 hours under the conditions of temperature is 200 DEG C, obtains described
Aluminium alloy super-hydrophobicity self-cleaning surface.
Using connecing for the aluminium alloy super-hydrophobic automatic cleaning surface obtained described in the test of the identical method of testing of above-described embodiment 1
Feeler, roll angle.
The aluminium alloy super-hydrophobic automatic cleaning surface that the present embodiment is prepared, its stereoscan photograph are as shown in Figure 8.Its table
Micron-sized papillary structure is presented in face.
The aluminium alloy super-hydrophobic automatic cleaning surface and the contact angle schematic diagram of water such as Fig. 4 (g) institutes that the present embodiment is prepared
Show, shown in roll angle schematic diagram such as Fig. 4 (h).
The aluminium alloy super-hydrophobic automatic cleaning surface and the contact angle of water that the present embodiment is prepared are 155.4 °, and roll angle is
9.0 °, test result is shown in Table 1.
Table 1 is the survey of aluminium alloy super-hydrophobic automatic cleaning surface contact angle, roll angle that various embodiments of the present invention are prepared
Test result.
Table 1
| Embodiment | Contact angle/° | Roll angle/° |
| Embodiment 1 | 156.9 | 7.3 |
| Embodiment 2 | 157.3 | 8.8 |
| Embodiment 3 | 155.3 | 8.3 |
| Embodiment 4 | 155.4 | 9.0 |
The above embodiment of the present invention is not to the present invention just for the sake of clearly illustrating examples of the invention
Embodiment restriction.Every any modification made in spirit of the invention and principle, equivalent substitution and improvement etc. all should
Within the protection domain of the claims in the present invention.
Claims (9)
- A kind of 1. method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser, it is characterised in that：Methods described Comprise the following steps：Step 1, pending aluminum alloy surface is polished pretreatment, obtains the aluminum alloy sample after the polishing of surface；Step 2, the aluminum alloy sample after surface polishing described in step 1 is placed in the ultrasonic washing instrument for filling deionized water Cleaning, ethanol cleaning is then recycled, after cleaning up, the aluminum alloy sample surface is dried up with cold wind or room temperature is dried in the air naturally It is dry, obtain the aluminum alloy sample of cleaning；Step 3, using laser processing technology, regulated using short-pulse laser after the technological parameter of correlation to step 2 institute The clean aluminium alloy sample surfaces for stating to obtain carry out laser scanning processing, and countless micro-structurals is processed in sample surfaces；The laser scanning carries out light beam scanning using galvanometer system, and the speed of vibration mirror scanning is 0.1mm/s-30m/s, laser The break-make and scanning range of galvanometer system, scanning track and process velocity are controlled and set by computer program；Or the laser scanning carries out light beam scanning using polygon prism system, the speed of polygon prism scanning is 1m/s-800m/s, is swashed The break-make of the light and scanning range of polygon prism system, scanning track and process velocity are controlled and set by computer program；Or the laser scanning is realized using motion platform system, and light beam is fixed, the motion of sample relative beam, platform motion Speed is 0.1mm/s-3m/s, and break-make, platform movement locus and the speed of laser are controlled and set by computer program；Step 4, aluminum alloy sample of the surface that step 3 obtains after Laser Processing is handled is put into constant temperature and humidity electric heating dry Toasted in dry case, that is, obtain the aluminium alloy 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, the Laser Processing Parameter is：Pulsewidth is more than 10ns, and single pulse energy is less than 1.03mJ；Pressure described in step 4 in electrically heated drying cabinet is normal atmospheric pressure, humidity 40%-60%RH, temperature is 100 DEG C- 250 DEG C, time of sample baking be 2-8 hours, and the temperature error in the electrically heated drying cabinet is ± 1 DEG C.
- 2. a kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser as claimed in claim 1, its It is characterised by：Described aluminium alloy is 2A12 aluminium alloys.
- 3. a kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser as claimed in claim 1 or 2, It is characterized in that：The repetition rate of the short-pulse laser is 70kHz-1000kHz, a width of more than 10ns of the arteries and veins and is less than Equal to 500ns.
- 4. a kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser as claimed in claim 3, its It is characterised by：The wavelength of the short-pulse laser is 1064nm, and the repetition rate of the short-pulse laser is 100kHz- 500kHz, pulsewidth 20ns-240ns, the single pulse energy are 0.1mJ-0.6mJ.
- 5. a kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser as claimed in claim 4, its It is characterised by：The pulsewidth is 240ns, and the single pulse energy is 0.35mJ-0.6mJ, and the laser scanning speed is 1000mm/s-2000mm/s。
- 6. a kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser as claimed in claim 4, its It is characterised by：The pulsewidth is 20ns, and the single pulse energy is 0.1mJ-0.12mJ, and the laser scanning speed is 1000mm/s-2500mm/s。
- 7. a kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser as claimed in claim 5, its It is characterised by：The single pulse energy is 0.6mJ, and the repetition rate of the short-pulse laser is 100kHz.
- 8. a kind of method that aluminium alloy super-hydrophobic automatic cleaning surface is prepared using short-pulse laser as claimed in claim 1, its It is characterised by：Humidity in the constant temperature and humidity electrically heated drying cabinet is 55%RH, and temperature is 200 DEG C, and the time of baking is small for 4 When.
- 9. the aluminium alloy super-hydrophobic automatic cleaning surface that a kind of method using described in claim any one of 1-8 is prepared, institute Stating surface has micron order papillary structure.
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| CA2379959A1 (en) * | 1999-07-19 | 2001-01-25 | The Regents Of The University Of California | Contour forming of metals by laser peening |
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