CN109778169A - A kind of super-hydrophobic aluminum alloy surface and preparation method thereof with wearability and heat resistance - Google Patents
A kind of super-hydrophobic aluminum alloy surface and preparation method thereof with wearability and heat resistance Download PDFInfo
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- CN109778169A CN109778169A CN201910259829.6A CN201910259829A CN109778169A CN 109778169 A CN109778169 A CN 109778169A CN 201910259829 A CN201910259829 A CN 201910259829A CN 109778169 A CN109778169 A CN 109778169A
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Abstract
The invention belongs to field of new materials, are related to process for modifying surface field, and in particular to a kind of super-hydrophobic aluminum alloy surface and preparation method thereof with wearability and heat resistance.For the problem that super hydrophobic surface mechanical endurance in the prior art is poor, the technical scheme is that, include the following steps: that [1] aluminum alloy surface pre-processes: aluminum alloy surface being pre-processed by blasting craft, pretreated aluminum alloy sample is cleaned and dried；[2] it impregnates: progress surface in perfluoro caprylic acid solution will be immersed in by the aluminum alloy sample of step [1] processing and be modified, dried after the completion of surface is modified, finally obtain super-hydrophobic aluminum alloy surface.The present invention is suitable for space flight, navigation, bridge, the preparation of the super-hydrophobic aluminum alloy material in every field such as building.
Description
Technical field
The invention belongs to field of new materials, are related to process for modifying surface field, and in particular to a kind of with wearability and resistance to
Hot super-hydrophobic aluminum alloy surface and preparation method thereof.
Background technique
Alloy material has excellent electric conductivity, thermal conductivity and corrosion stability, in space flight, navigation, bridge, each neck such as building
Domain is widely used, such as the fuselage of aircraft is often manufactured with aluminum alloy materials.But Al-alloy products in use also can be by
Oxidation, and the oxidation film on its surface easily adsorbs the pollutants such as greasy dirt pigment, and these will affect Al-alloy products in reality
Application in life.So particularly important to the research for the contamination resistance for improving aluminum alloy product surface.
Super hydrophobic surface, which refers to, is greater than 150 °, and surface of its roll angle less than 10 ° with the static contact angle of water.It
Construction needs two necessary conditions, first is that needing with micron or nanoscale rough structure；Second is that having lower surface energy.
Chinese patent CN1072993088 discloses a kind of preparation method of super hydrophobic surface, is first pre-processed again surface with logical
Cross supersonic flame spraying method and prepare tungsten carbide system coating on pretreating surface, then one layer of resurfacing surface modification it is low
Surface energy substance can be obtained super hydrophobic surface.
Although there are many outstanding performances for super hydrophobic surface, for example, self-cleaning property, anti-ice, anticorrosive property etc..But compared with
The mechanical endurance of difference is there is still a need for the main problem solved, it not only makes the service life reduction of super hydrophobic surface, Er Qieji
The big practical ranges for reducing super hydrophobic surface.
Summary of the invention
For the problem that super hydrophobic surface mechanical endurance in the prior art is poor, the present invention provides a kind of with wearability
With the super-hydrophobic aluminum alloy surface of heat resistance and preparation method thereof, the working environment adaptability of super hydrophobic surface can be improved (such as
The performances such as mechanical endurance and thermal stability), widen the application market of super hydrophobic surface.And this method is repaired by sandblasting and chemistry
The method of decorations has the characteristics that economical, simple, safe.
The technical solution adopted by the invention is as follows:
A kind of preparation method on the super-hydrophobic aluminum alloy surface with wearability and heat resistance, includes the following steps:
[1] aluminum alloy surface pre-processes: being pre-processed by blasting craft to aluminum alloy surface, pretreated aluminium closes
Golden sample is cleaned and is dried；
[2] it impregnates: progress surface in perfluoro caprylic acid solution will be immersed in by the aluminum alloy sample of step [1] processing and changed
Property, it is dried after the completion of surface is modified, finally obtains super-hydrophobic aluminum alloy surface.
After the technical solution, by modified two steps in blasting craft and surface, it can be made with excellent resistance to
Mill property and thermal stability and the strong super-hydrophobic aluminum alloy surface of contamination resistance.Blasting craft is originally a kind of for cleaning or being roughened
The technique of material surface, there has been no document report, it being capable of reinforcing material table during chemical modification prepares super hydrophobic surface
The wearability and thermal stability in face.And this method combines two kinds of techniques, so that other method systems in compared with the existing technology
At super-hydrophobic aluminum alloy surface, the wearability and thermal stability on super-hydrophobic aluminum alloy surface made of this method be especially prominent.
And this method has not only saved cost, reduces environmental pollution, additionally it is possible to realize and produce in enormous quantities.
Preferably, in the blasting craft, the grit size of sandblasting is -160 mesh of 24 mesh.Grit energy in the magnitude range
Satisfactory micron or nanoscale rough structure are enough formed in aluminum alloy surface by blasting craft.
Preferably, the actual conditions that pretreated aluminum alloy sample described in step [1] is cleaned and dried are as follows: will
Aluminum alloy sample after sandblasting, which is sequentially placed into acetone and ethanol solution, to be cleaned by ultrasonic, and the time is respectively 5min-15min；It will
Aluminum alloy sample after cleaning is put into heating, drying in 80 DEG C -100 DEG C of baking oven, drying time 1h-2h.
Preferably, the concentration of perfluoro caprylic acid solution described in step [2] is 0.01mol-0.05mol, and aluminum alloy sample exists
In perfluoro caprylic acid solution impregnate when environment temperature be 60 DEG C -100 DEG C, aluminum alloy sample impregnated in perfluoro caprylic acid solution when
Between be 4h-12h.
Preferably, the actual conditions that the aluminum alloy sample after the completion of surface described in step [2] is modified is dried are as follows: will
Aluminum alloy sample is put into heat drying 1h-2h in 80 DEG C -100 DEG C of baking oven.
Technological parameter in above-mentioned preferred embodiment is preferred parameter, can satisfy and is made with superior abrasion resistance and heat
Stability and the strong super-hydrophobic aluminum alloy surface of contamination resistance.
The present invention also provides a kind of super-hydrophobic aluminum alloy tables with wearability and heat resistance prepared according to the method described above
Face.The static contact angle on the super-hydrophobic aluminum alloy surface is up to 156 ° ± 2 ° and roll angle is 3 °.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
1, the preparation method on a kind of super-hydrophobic aluminum alloy surface with wearability and heat resistance proposed by the present invention, the party
The sandblasting and chemical modification that method uses, have not only saved cost, have reduced environmental pollution, and can be realized mass production.
2, the preparation method on a kind of super-hydrophobic aluminum alloy surface with wearability and heat resistance proposed by the present invention, the party
The super-hydrophobic aluminum alloy surface contact angle of method preparation is 150.6 ° -156 °, and roll angle is 3 °, has good hydrophobicity
Energy.
3, super-hydrophobic aluminum alloy surface made of the method for the present invention is polished under the pressure of 5kPa with the sand paper of 1000 mesh
800cm, graduating with cutter 8 times are still able to maintain super-hydrophobicity after hammering 50 times.And super-hydrophobic aluminum alloy surface cannot made of other methods
Reach such performance.Therefore, aluminum alloy surface made of the method for the present invention has significantly compared with the existing technology in wearability
Promotion.
4, super-hydrophobic aluminum alloy surface made of the method for the present invention is still able to maintain excellent super-hydrophobic at 240 DEG C of high temperature
Property.And super-hydrophobic aluminum alloy surface made of other methods cannot reach such performance.Therefore, surpass made of the method for the present invention
Hydrophobic aluminum alloy surface is obviously improved in heat resistance compared with the existing technology.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is using scanning electron microscope of the super-hydrophobic aluminum alloy surface under smaller amplification factor made of the method for the present invention
(SEM) picture.
Fig. 2 is using scanning electron microscope of the super-hydrophobic aluminum alloy surface under larger amplification factor made of the method for the present invention
(SEM) picture.
Fig. 3 is the contact angle schematic diagram to water using super-hydrophobic aluminum alloy surface made of the method for the present invention.
Fig. 4 is using scanning electron microscope (SEM) picture after the polishing of super-hydrophobic aluminum alloy surface made of the method for the present invention.
Fig. 5 is using the contact angle schematic diagram after the polishing of super-hydrophobic aluminum alloy surface made of the method for the present invention.
Fig. 6 is using the photo after super-hydrophobic aluminum alloy surface graduating with cutter made of the method for the present invention.
Fig. 7 is using the water droplet photo after super-hydrophobic aluminum alloy surface graduating with cutter made of the method for the present invention.
Fig. 8 be using super-hydrophobic aluminum alloy surface made of the method for the present invention at a temperature of 180 DEG C -260 DEG C contact angle
Change curve.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
It elaborates below with reference to Fig. 1 to Fig. 8 present invention.
Embodiment 1
The present embodiment provides a kind of preparation method on super-hydrophobic metal aluminum alloy surface, below preparation methods steps:
(1) aluminum alloy surface pre-process: will having a size of the aluminium alloy of 20 × 20 × 1cm carry out blasting treatment, gravel it is big
Small is 24 mesh, and the sample after sandblasting is sequentially placed into acetone and ethanol solution and is cleaned by ultrasonic, the time is 10min.
(2) it impregnates: the Al alloy block after cleaning being immersed in the perfluoro caprylic acid solution of 0.01mol, environment temperature is 95 DEG C,
Soaking time is 4h.
(3) sample after the completion of immersion is taken out, as 1h dry in baking oven, obtains super-hydrophobic aluminum alloy surface.
The contact angle that above-mentioned super-hydrophobic aluminum alloy surface is measured using SL200B contact angle measurement is uniformly selected on its surface
5 points are taken, the average value for measuring contact angle is shown in Table 1.
Embodiment 2
The present embodiment provides a kind of preparation method on super-hydrophobic metal aluminum alloy surface, below preparation methods steps:
(1) aluminum alloy surface pre-process: will having a size of the aluminium alloy of 20 × 20 × 1cm carry out blasting treatment, gravel it is big
Small is 24 mesh, and the sample after sandblasting is sequentially placed into acetone and ethanol solution and is cleaned by ultrasonic, the time is 10min.
(2) it impregnates: the Al alloy block after etching is steeped in the perfluoro caprylic acid solution of 0.01mol, environment temperature is 95 DEG C,
Soaking time is 6h.
(3) sample after the completion of immersion is taken out, as 1h dry in baking oven, obtains super-hydrophobic aluminum alloy surface.
The contact angle that above-mentioned super-hydrophobic aluminum alloy surface is measured using SL200B contact angle measurement is uniformly selected on its surface
5 points are taken, the average value for measuring contact angle is shown in Table 1.
Embodiment 3
The present embodiment provides a kind of preparation method on super-hydrophobic metal aluminum alloy surface, below preparation methods steps:
(1) aluminum alloy surface pre-process: will having a size of the aluminium alloy of 20 × 20 × 1cm carry out blasting treatment, gravel it is big
Small is 24 mesh, and the sample after sandblasting is sequentially placed into acetone and ethanol solution and is cleaned by ultrasonic, the time is 10min.
(2) it impregnates: the Al alloy block after etching is steeped in the perfluoro caprylic acid solution of 0.01mol, environment temperature is 95 DEG C,
Soaking time is 8h.
(3) sample after the completion of immersion is taken out, as 1h dry in baking oven, obtains super-hydrophobic aluminum alloy surface.
The contact angle that above-mentioned super-hydrophobic aluminum alloy surface is measured using SL200B contact angle measurement is uniformly selected on its surface
5 points are taken, the average value for measuring contact angle is shown in Table 1.
Embodiment 4
The present embodiment provides a kind of preparation method on super-hydrophobic metal aluminum alloy surface, below preparation methods steps:
Aluminum alloy surface pretreatment: blasting treatment will be carried out having a size of the aluminium alloy of 20 × 20 × 1cm, the size of gravel is
Sample after sandblasting is sequentially placed into acetone and ethanol solution and is cleaned by ultrasonic by 24 mesh, and the time is 10min.
(2) it impregnates: the Al alloy block after etching is steeped in the perfluoro caprylic acid solution of 0.01mol, environment temperature is 95 DEG C,
Soaking time is 12h.
(3) sample after the completion of immersion is taken out, as 1h dry in baking oven, obtains super-hydrophobic aluminum alloy surface.
The contact angle that above-mentioned super-hydrophobic aluminum alloy surface is measured using SL200B contact angle measurement is uniformly selected on its surface
5 points are taken, the average value for measuring contact angle is shown in Table 1.
Embodiment 5
The present embodiment provides a kind of preparation method on super-hydrophobic metal aluminum alloy surface, below preparation methods steps:
Aluminum alloy surface pretreatment: blasting treatment will be carried out having a size of the aluminium alloy of 20 × 20 × 1cm, the size of gravel is
Sample after sandblasting is sequentially placed into acetone and ethanol solution and is cleaned by ultrasonic by 24 mesh, and the time is 10min.
(2) it impregnates: the Al alloy block after etching is steeped in the perfluoro caprylic acid solution of 0.01mol, environment temperature is 95 DEG C,
Soaking time is for 24 hours.
(3) sample after the completion of immersion is taken out, as 1h dry in baking oven, obtains super-hydrophobic aluminum alloy surface.
The contact angle that above-mentioned super-hydrophobic aluminum alloy surface is measured using SL200B contact angle measurement is uniformly selected on its surface
5 points are taken, the average value for measuring contact angle is shown in Table 1.
Table 1
| Embodiment | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Contact angle | 150.6° | 151.8° | 153° | 156° | 155.6° |
As shown in Table 1, the super-hydrophobic aluminum alloy surface prepared by the present invention has good hydrophobicity.
Super-hydrophobic aluminum alloy surface made of Example 4 is polished under the pressure of 5kPa with the sand paper of 1000 mesh
800cm, graduating with cutter 8 times, after hammering 50 times, its contact angle is 148 ° after tested, shows that it is still able to maintain super-hydrophobicity.As right
Than 553 (2018) 645-651 of document Colloids and Surfaces A proposes a kind of preparation side of super hydrophobic surface
Method, using thermal spraying F323/PFOA/Al2O3The method of solution prepares super hydrophobic surface, and super hydrophobic surface made of this method exists
It is polished under the pressure of 0.47kPa with the sand paper of 1000 mesh and loses super-hydrophobicity after 500cm.In addition, document
The super hydrophobic surface that Appl.Surf.Sci.356 (2015) 639-644 is prepared using the method that thermal spray deposition and PTFE are modified
It is polished under the pressure of 2.5kPa with the sand paper of 800 mesh and loses super-hydrophobicity after 100cm.As it can be seen that surpassing made of the method for the present invention
Hydrophobic aluminum alloy surface is obviously improved in wearability.
Its ultra-hydrophobicity at high temperature is tested on super-hydrophobic aluminum alloy surface made of Example 4, as a result such as Fig. 8
Shown, as can be seen from Figure at a high temperature of 240 DEG C, super-hydrophobic aluminum alloy surface is still able to maintain excellent super-hydrophobicity.As
Comparison, document Colloids and Surfaces A 567 (2019) 205-212 propose a kind of preparation side of super hydrophobic surface
Method prepares super hydrophobic surface using the method for HCl etching and PFOA modification, and super hydrophobic surface made of this method is at 200 DEG C
Super-hydrophobicity is lost after placing two hours under environment.In addition, document Appl.Surf.Sci.420 (2017) 336-345 is proposed
A kind of preparation method of super-hydrophobic coat, using the method for electrochemical deposition and chemical modification prepares super-hydrophobic coat, the party
Super-hydrophobic coat made of method can only no more than 200 DEG C at a temperature of maintain its super-hydrophobicity.It can be seen that the method for the present invention
Manufactured super-hydrophobic aluminum alloy surface is obviously improved in heat resistance.
The specific embodiment of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
The limitation to the application protection scope therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, under the premise of not departing from technical scheme design, various modifications and improvements can be made, these belong to this
The protection scope of application.
Claims (6)
1. a kind of preparation method on the super-hydrophobic aluminum alloy surface with wearability and heat resistance, which is characterized in that including as follows
Step:
[1] aluminum alloy surface pre-processes: being pre-processed by blasting craft to aluminum alloy surface, pretreated aluminium alloy sample
Product are cleaned and are dried；
[2] it impregnates: progress surface in perfluoro caprylic acid solution will be immersed in by the aluminum alloy sample of step [1] processing and be modified, table
It is dried after the completion of face is modified, finally obtains super-hydrophobic aluminum alloy surface.
2. a kind of preparation method on super-hydrophobic aluminum alloy surface with wearability and heat resistance described in accordance with the claim 1,
It is characterized by: the grit size of sandblasting is -160 mesh of 24 mesh in the blasting craft.
3. a kind of preparation method on super-hydrophobic aluminum alloy surface with wearability and heat resistance described in accordance with the claim 1,
It is characterized in that, the actual conditions that pretreated aluminum alloy sample described in step [1] is cleaned and dried are as follows: by sandblasting
Aluminum alloy sample afterwards, which is sequentially placed into acetone and ethanol solution, to be cleaned by ultrasonic, and the time is respectively 5min-15min；It will cleaning
Aluminum alloy sample afterwards is put into heating, drying in 80 DEG C -100 DEG C of baking oven, drying time 1h-2h.
4. a kind of preparation method on super-hydrophobic aluminum alloy surface with wearability and heat resistance described in accordance with the claim 1,
It is characterized by: the concentration of perfluoro caprylic acid solution described in step [2] is 0.01mo l-0.05mo l, aluminum alloy sample is complete
Environment temperature when impregnating in fluorine octanoic acid solution is 60 DEG C -100 DEG C, the time that aluminum alloy sample impregnates in perfluoro caprylic acid solution
For 4h-12h.
5. a kind of preparation method on super-hydrophobic aluminum alloy surface with wearability and heat resistance described in accordance with the claim 1,
It is characterized in that, the actual conditions that the aluminum alloy sample after the completion of surface described in step [2] is modified is dried are as follows: close aluminium
Golden sample is put into heat drying 1h-2h in 80 DEG C -100 DEG C of baking oven.
6. a kind of Super-hydrophobic aluminium with wearability and heat resistance prepared according to method described in any one of claim 1 to 5
Alloy surface.
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| CN113046749A (en) * | 2021-02-06 | 2021-06-29 | 西南交通大学 | Super-hydrophobic stainless steel surface and preparation method thereof |
| CN114395326A (en) * | 2022-01-14 | 2022-04-26 | 严平 | Super-hydrophobic heat-resistant coating for aluminum alloy and preparation method thereof |
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