CN110124965A - A kind of electrical discharge machining and the compound method for preparing super-hydrophobic surface of spray coating method - Google Patents
A kind of electrical discharge machining and the compound method for preparing super-hydrophobic surface of spray coating method Download PDFInfo
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- CN110124965A CN110124965A CN201910510620.2A CN201910510620A CN110124965A CN 110124965 A CN110124965 A CN 110124965A CN 201910510620 A CN201910510620 A CN 201910510620A CN 110124965 A CN110124965 A CN 110124965A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/007—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/14—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by electrical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/30—Change of the surface
- B05D2350/33—Roughening
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- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The present invention proposes a kind of electrical discharge machining and the compound method for preparing super-hydrophobic surface of spray coating method, and the method includes the clamping of the pretreatment of metal tools, metal works and tool-electrode, electro-discharge machining, cleaning, carbon nanotube spraying and immersion oil heat treatment steps.The method solves using low-surface-energy reagent such as fluorization agent immersion process the bring problems in technique and cost, it is wear-resistant that the stability of carbon has metal material super hydrophobic surface obtained, the high feature of stability, and simple process, it is low in cost, convenient for large-scale production, it is applied to actual production and life.
Description
Technical field
The invention belongs to spark erosion technique fields, surpass more particularly to a kind of electrical discharge machining and spray coating method are compound
Hydrophobic surface preparation method.
Background technique
Super hydrophobic surface refers to that water droplet is greater than 150 ° in the static contact angle of the surface of solids, surface of the roll angle less than 10 °.
The many phenomenons of nature are all the embodiment of super hydrophobic surface, such as butterfly's wing, lotus leaf and water skipper, and super hydrophobic surface has a system
The excellent performance of column such as drag reduction, corrosion resistance and self-cleaning performance etc..Applying it to the fields such as industrial production can be effective
Ground enhances the service performance of product, there is good application prospect.Experimental studies have found that super hydrophobic surface is micro nano structure and table
Face chemical component is coefficient as a result, the intensity due to nanostructure is lower, so surface is often failed due to easy to wear,
The wear resistance of super hydrophobic surface, which becomes, limits its widely applied urgent problem to be solved.Existing super hydrophobic surface system
There are many conditions limitations such as cost problem and work for Preparation Method such as self assembly, hydro-thermal reaction, electrostatic spinning and laser processing
Skill process is complicated, it is made to be difficult to be applied to large-scale industrial production.
Electric discharge machining method is a kind of typical special process method, main to utilize the arteries and veins between workpiece and tool-electrode
It rushes power supply and applies high pressure, achieve the effect that remove material by the spark discharge between positive and negative electrode.Due to electrical discharge machining
Without macroscopic view active force between methods and instruments and workpiece, it is highly suitable for the processing of high-strength material, and the electricity in process
Pole loss problem makes it there is precision problem in application process again.EDM process is that interpolar electric energy is converted to
Thermal energy, which melts material, to be vaporized, and with the process that particle is dished out and taken away by working solution by explosive force, therefore adding in workpiece
Work surface can have electric discharge pit and protrusion, influence surface roughness.And in edm process surface leave it is coarse
Structure can be used as the substrate for preparing metal super-hydrophobic surface, preferably super thin using originally unfavorable concaveconvex structure realization with this
Water effect.
Existing preparation method is that low-surface-energy reagent such as fluorization agent and long-chain are used after constructing micro nano structure mostly
The processing such as fatty acid, the super-hydrophobicity on surface is realized with this.However there are expensive, toxicity and long-times for low-surface-energy reagent
The labile disadvantage of exposure, limits its application in large-scale production.Multi-walled carbon nanotube has particle tiny, and hydrophobicity is good
Etc. performances, and thermal stability is good, and high temperature is not easily decomposed.One layer of uniform tiny carbon nanotube is deposited in surface machined by EDM
Layer can effectively reach super-hydrophobic effect, in conjunction with the micron order concaveconvex structure and carbon nanotube group of surface machined by EDM
At micron and nanometer composite structure, so that low-surface energy substance is not easy to be wiped free of, solves the problems, such as steady in a long-term and large scale preparation.
Summary of the invention
Poor the invention aims to solve the stability in existing super hydrophobic surface technology, process flow is complicated, cost
The problem of height limitation large-scale use, propose a kind of electrical discharge machining and the compound method for preparing super-hydrophobic surface of spray coating method；
In metal surface, formation contact angle is greater than 150 °, super-hydrophobic coat of the roll angle less than 10 °, and can prepare surface band according to demand
Figuratum super hydrophobic surface, by carrying out process according to figure rule to surface, so that difference of the surface according to wetability
It is different to show different droplet effects, it can effectively manipulate the movement of water flow and water droplet.
The present invention is achieved by the following technical solutions, and the present invention proposes that a kind of electrical discharge machining and spray coating method are compound
Method for preparing super-hydrophobic surface the described method comprises the following steps:
The pretreatment of step 1, metal works: by metal work piece materials surface using varigrained sand paper by slightly to progressing greatly
Row polishing, removes oxide layer, cleans dirt using acetone, dries；
The clamping of step 2, metal works and tool-electrode: metal works are required to carry out clamping according to technique, by tool
Electrode is mounted on the main tapping of platform of machine tool, carries out leveling alignment；
Step 3, electro-discharge machining: metal works and tool-electrode are connected with the positive or negative pole of the pulse power respectively, use
The processing method of fliud flushing is done electric spark milling according to numerical control program by tri- axis servo feed mechanism driving instrument electrode of X, Y, Z and is added
Work or sinking EDM make the super hydrophobic surface discharge treatment of metal works, form micron-sized coarse structure；
Step 4, cleaning: electrical discharge milling machining or sinking EDM treated surface are gone using alcohol
It degreases and cracks carbon particle with non-uniform kerosene；
Step 5, carbon nanotube spraying: configuration carbon nanotube and alcohol suspension are packed into airbrush tool, airbrush are fixed on
It on Z axis, adjusts the angle, carries out spray treatment according to the track set in numerical control program；
Step 6, immersion oil heat treatment: after spraying carbon nanotube, after vaporized alcohol, being added dropwise oil droplet on carbon-coating,
And heat drying, make carbon particle aggregation enhancing stability, completes the preparation of metal super-hydrophobic surface.
Further, the tool-electrode is metal material electrode or graphite material electrode, if using metal material electrode,
Then metal works are connected with pulse power anode, metal material electrode is connected with pulse power cathode；If using graphite material
Expect electrode, then metal works is connected with pulse power cathode, graphite material electrode is connected with pulse power anode.
Further, working solution used in the processing method of the fliud flushing is kerosene working solution, and filling liquid nozzle is aligned
Working position, working solution are recycled.
Further, the working depth of the metal works is 0.05mm.
Further, the tool-electrode is that cylinder electrode or bottom surface have and the consistent electrode of super hydrophobic surface shape.
Further, the alcohol for spraying the carbon nanotube mass score 10-30wt% that the suspension used is configuration is suspended
Liquid.
Further, the heating temperature is 310 DEG C, heating time 3-5min.
The invention has the benefit that
Method of the present invention solves the problems, such as the extensive large area preparation of metal super-hydrophobic surface, uses electrical fire
Flower lathe cooperation spray equipment completes the process flow of preparation, and efficiency is greatly improved, and the method is suitable for nearly all
Metal material requires the super-hydrophobic effect for realizing different surfaces pattern and type chamber according to technique.The present invention is dexterously by electric spark
Processing method is applied to surface treatment, in edm process surface relief structure originally as influence surface roughness not
Sharp factor is applied to the preparation of super hydrophobic surface, achievees the effect that turn waste into wealth.The concaveconvex structure of surface machined by EDM
For post-processing in carbon nanotube particulate aggregation provide it is good depend on basal plane, micron level pit is in conjunction with nano carbon particle
Micron and nanometer composite structure is constructed, anti-wettability is enhanced, improves the wear strength on surface.Present invention use is by electric spark
The method that finished surface sprays carbon nanotube makes carbon nanotube particulate be deposited on the surface with pit and protrusion, then passes through
Oil dripping and evaporate mode assemble carbon particle.The method is solved using low-surface-energy reagent such as fluorization agent immersion process in work
Bring problems in skill and cost, it is wear-resistant that the stability of carbon has metal material super hydrophobic surface obtained, surely
Qualitative high feature, and simple process and low cost are applied to actual production and life convenient for large-scale production.
Detailed description of the invention
Fig. 1 is the device signal of electrical discharge machining of the present invention and the compound method for preparing super-hydrophobic surface of spray coating method
Figure；
Fig. 2 is the process flow of electrical discharge machining of the present invention and the compound method for preparing super-hydrophobic surface of spray coating method
Figure；
Fig. 3 is SEM (scanning electron microscope) schematic diagram of the aluminium surface of electrical discharge machining, and the machining voltage used is
110V, peak point current 36A, pulsewidth 120us, duty ratio 20%；
Fig. 4 is SEM (scanning electron microscope) schematic diagram of the super hydrophobic surface sprayed by carbon nanotube；
Fig. 5 is the water droplet contact angle and roll angle test chart of super hydrophobic surface prepared by the present invention.
Specific embodiment
Technical solution in the embodiment of the present invention that following will be combined with the drawings in the embodiments of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Device used in the method for the invention is three-axis numerical control platform, as shown in Figure 1, cooperation electrical discharge machining pulse power
And general or specialized fixture is combined, realize the super hydrophobic surface processing of different workpieces.In conjunction with Fig. 2, the present invention proposes a kind of electricity
Spark processing and the compound method for preparing super-hydrophobic surface of spray coating method, the described method comprises the following steps:
The pretreatment of step 1, metal works: by metal work piece materials surface using varigrained sand paper by slightly to progressing greatly
Row polishing, removes oxide layer, cleans dirt using acetone, dries；Metal work piece materials used can be arbitrary metal material
Expect, such as aluminium, copper material, more metal material is applied in the engineerings such as stainless steel, as long as can be carried out electro-discharge machining；
The clamping of step 2, metal works and tool-electrode: metal works are required to carry out clamping according to technique, by tool
Electrode is mounted on the main tapping of platform of machine tool, carries out leveling alignment；
Step 3, electro-discharge machining: metal works and tool-electrode are connected with the positive or negative pole of the pulse power respectively, use
The processing method of fliud flushing is done electric spark milling according to numerical control program by tri- axis servo feed mechanism driving instrument electrode of X, Y, Z and is added
Work or sinking EDM are formed micron-sized coarse as shown in figure 3, making the super hydrophobic surface discharge treatment of metal works
Structure；
The tool-electrode is metal material electrode or graphite material electrode, if using metal material electrode, by metal
Workpiece is connected with pulse power anode, and metal material electrode is connected (i.e. positive polarity processing) with pulse power cathode；If using
Metal works are then connected by graphite material electrode with pulse power cathode, and graphite material electrode is connected with pulse power anode
(i.e. negative polarity processing).
Working solution used in the processing method of the fliud flushing is kerosene working solution, and filling liquid nozzle is directed at working position,
Working solution is recycled；
Tool-electrode and metal works position are leveled before electrical discharge machining, so that gap is wide, in process
In, the working depth of workpiece is 0.05mm；
The tool-electrode is that cylinder electrode or bottom surface have and the consistent electrode of super hydrophobic surface shape.
Step 4, cleaning: electrical discharge milling machining or sinking EDM treated surface are gone using alcohol
It degreases and cracks carbon particle with non-uniform kerosene；
Step 5, carbon nanotube spraying: configuration carbon nanotube and alcohol suspension are packed into airbrush tool, airbrush are fixed on
It on Z axis, adjusts the angle, carries out spray treatment according to the track set in numerical control program, as shown in Figure 4；Spraying uses outstanding
Turbid is the alcohol suspension of the carbon nanotube mass score 10-30wt% of configuration.It is exported using airbrush apart from workpiece surface 5-
30mm is adjustable, and the coating thickness of carbon nanotube is adjusted according to operating distance；
Step 6, immersion oil heat treatment: after spraying carbon nanotube, after vaporized alcohol, being added dropwise oil droplet on carbon-coating,
And heat drying, make carbon particle aggregation enhancing stability, completes the preparation of metal super-hydrophobic surface, the water droplet of super hydrophobic surface connects
Feeler and roll angle test chart are as shown in Figure 5.The heating temperature is 310 DEG C, heating time 3-5min.
Above to a kind of electrical discharge machining provided by the present invention and the compound method for preparing super-hydrophobic surface of spray coating method, into
It has gone and has been discussed in detail, used herein a specific example illustrates the principle and implementation of the invention, the above implementation
The explanation of example is merely used to help understand method and its core concept of the invention；Meanwhile for the general technology people of this field
Member, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion this explanation
Book content should not be construed as limiting the invention.
Claims (7)
1. a kind of electrical discharge machining and the compound method for preparing super-hydrophobic surface of spray coating method, it is characterised in that: the method includes
Following steps:
The pretreatment of step 1, metal works: by metal work piece materials surface using varigrained sand paper by slightly being beaten to the row that progresses greatly
Mill removes oxide layer, cleans dirt using acetone, dries；
The clamping of step 2, metal works and tool-electrode: metal works are required to carry out clamping according to technique, by tool-electrode
It is mounted on the main tapping of platform of machine tool, carries out leveling alignment；
Step 3, electro-discharge machining: metal works and tool-electrode are connected with the positive or negative pole of the pulse power respectively, using fliud flushing
Processing method, by tri- axis servo feed mechanism driving instrument electrode of X, Y, Z according to numerical control program do electrical discharge milling machining or
Sinking EDM makes the super hydrophobic surface discharge treatment of metal works, forms micron-sized coarse structure；
Step 4, cleaning: electrical discharge milling machining or sinking EDM treated surface are removed oil using alcohol
Dirty and non-uniform kerosene cracks carbon particle；
Step 5, carbon nanotube spraying: configuration carbon nanotube and alcohol suspension are packed into airbrush tool, airbrush are fixed on Z axis
On, it adjusts the angle, carries out spray treatment according to the track set in numerical control program；
Step 6, immersion oil heat treatment: after spraying carbon nanotube, after vaporized alcohol, oil droplet is added dropwise on carbon-coating, and add
Heated drying makes carbon particle aggregation enhancing stability, completes the preparation of metal super-hydrophobic surface.
2. according to the method described in claim 1, it is characterized by: the tool-electrode is metal material electrode or graphite material
Electrode, if metal works are connected with pulse power anode using metal material electrode, metal material electrode and the pulse power
Cathode is connected；If metal works are connected with pulse power cathode using graphite material electrode, graphite material electrode and arteries and veins
Positive pole is rushed to be connected.
3. according to the method described in claim 1, it is characterized by: working solution used in the processing method of the fliud flushing is coal
Filling liquid nozzle is directed at working position by oily working solution, and working solution is recycled.
4. according to the method described in claim 1, it is characterized by: the working depth of the metal works is 0.05mm.
5. method according to claim 1 or 2, it is characterised in that: the tool-electrode is that cylinder electrode or bottom surface have
With the consistent electrode of super hydrophobic surface shape.
6. according to the method described in claim 1, it is characterized by: the suspension that spraying uses is the carbon nanotube mass of configuration
The alcohol suspension of score 10-30wt%.
7. according to the method described in claim 1, it is characterized by: the heating temperature be 310 DEG C, heating time 3-
5min。
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| US20050181195A1 (en) * | 2003-04-28 | 2005-08-18 | Nanosys, Inc. | Super-hydrophobic surfaces, methods of their construction and uses therefor |
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2019
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| US20050181195A1 (en) * | 2003-04-28 | 2005-08-18 | Nanosys, Inc. | Super-hydrophobic surfaces, methods of their construction and uses therefor |
| CN102950099A (en) * | 2011-08-21 | 2013-03-06 | 比亚迪股份有限公司 | Super-hydrophobic material and preparation method thereof |
| US20140323633A1 (en) * | 2013-04-30 | 2014-10-30 | Kimberly-Clark Worldwide, Inc. | Non-Fluorinated Water-Based Superhydrophobic Compositions |
| CN106862040A (en) * | 2017-03-29 | 2017-06-20 | 武汉理工大学 | A kind of method that wire cutting prepares the orderly micro-nano super-drainage structure in metal surface |
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