CN102527619A - Preparation method for durable aluminum and aluminum alloy superhydrophobic surface coating - Google Patents
Preparation method for durable aluminum and aluminum alloy superhydrophobic surface coating Download PDFInfo
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- CN102527619A CN102527619A CN2012100331679A CN201210033167A CN102527619A CN 102527619 A CN102527619 A CN 102527619A CN 2012100331679 A CN2012100331679 A CN 2012100331679A CN 201210033167 A CN201210033167 A CN 201210033167A CN 102527619 A CN102527619 A CN 102527619A
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Abstract
The invention relates to the technical field of surface treatment and modification of metal materials, and in particular relates to a preparation method for manufacturing a durable superhydrophobic coating on the surface of the aluminum and aluminum alloy. The method comprises the following steps that: after the surface of the aluminum and the aluminum alloy is roughened, washed, corroded and cleaned, a compound coating of durable maleic anhydride grafted polypropylene and polypropylene is coated on the surface of the aluminum and the aluminum alloy; therefore, the surface of the aluminum and the aluminum alloy has good durable super-hydrophobicity; the contact angle between the water and the surface is more than 150 degrees; and the super-hydrophobicity is still good after half a year. The preparation method is simple, is easy to operate and low in cost, the adopted reagent is harmless to the human body and does not pollute the environment.
Description
Technical field
The present invention relates to the surface treatment and the modification technology field of metal material, specifically is a kind of method of making a kind of durable super-hydrophobic coat in aluminium and aluminum alloy surface.
Background technology
Aluminium and aluminium alloy have a wide range of applications in fields such as traffic, building, household electrical appliances and aviations.Under the influence of high temperature, acid rain and other mal-condition, contaminated easily, the corrosion of aluminium and aluminium alloy.This not only influences product appearance, even even more serious meeting reduces the service life of product.The coating of or oleophobic super-hydrophobic one of aluminium and alloy surface thereof structure, with reach waterproof, antifouling, oxidation resistant purpose has received widely and having paid close attention to, and has obtained bigger progress.
The method that is used to process aluminium and aluminium alloy super hydrophobic surface at present has laser method, anodizing, self-assembly method, chemical vapour deposition technique, physisorphtion and Mechanical Method etc.; Material with making coatings comprises siloxanes, silicon fluoride, polypropylene, stearic acid, polyethylene etc.Wherein ideal, but silicon fluoride class expensive with the hydrophobic effect of silicon fluoride series coating, and environment had bigger influence; Other materials or adhesive force are lower, or not durable, or the operation more complicated, are unfavorable for the industrial applications of product.
Summary of the invention
The purpose of this invention is to provide a kind of durable aluminium and the preparation method of aluminium alloy super-hydrophobic surface coating, the contact angle on the aluminum or aluminum alloy that obtains surface is more than 150 °.
The preparation method of aluminium of the present invention and aluminium alloy super-hydrophobic surface coating comprises the steps:
1. prepare super-hydrophobic solution.The PP GRANULES of getting a certain amount of maleic anhydride graft adds in the absolute ethyl alcohol, is heated to 100 ~ 140 ℃ and stir it is fully dissolved, and adds a certain amount of auxiliary reagent subsequently and obtains the maleic anhydride inoculated polypropylene mixed liquor A that concentration is 0.2 ~ 80mg/ml.Choose a certain amount of PP GRANULES and add in the absolute ethyl alcohol, be heated to 100 ~ 140 ℃ and stir and it is fully dissolved obtain the polypropylene solution B that concentration is 1 ~ 100mg/ml.
2. the surface roughening of aluminium and aluminium alloy is handled.With abrasive paper for metallograph or alternate manner roughened surface, ultrasonic cleaning falls to remain in the sand grains and the aluminium powder on aluminum or aluminum alloy surface in water, in acetone, cleans to remove surface and oil contaminant subsequently, uses distilled water drip washing clean at last with aluminum or aluminum alloy.
3. chemical attack.With handling 20s ~ 30min in the immersion of the aluminum or aluminum alloy after the cleaning chemical corrosion liquid, treatment temperature is 5 ~ 30 ℃.The chemical corrosion liquid that is adopted can be general in the industry, and the preferred corrosive liquid of the present invention is the acid solution of 1 ~ 25wt%.Acid is a kind of or combination in nitric acid, sulfuric acid and the hydrochloric acid.
4. overlay film.With The tape casting the A solution of step 1 preparation being spread on 3 aluminum or aluminum alloy surfaces after handling set by step, is 55 ~ 75% in relative humidity, and temperature is the down dry 8 ~ 12h of 5 ~ 30 ℃ environment.After the same method the B solution of step 1 preparation is spread on sample subsequently, promptly got durable aluminum or aluminum alloy super-hydrophobic surface coating after the drying.
The auxiliary reagent that step 1 of the present invention adopted is a kind of or combination in organo-aluminium, the silane coupler.Organo-aluminium can be a kind of or combination in aluminium isopropoxide, trialkylaluminium, the dialkylaluminum chloride; Silane coupler can be general.
The present invention compared with prior art has following outstanding advantage and effect:
1. the static contact angle of the aluminum or aluminum alloy super hydrophobic surface of employing the present invention acquisition and distilled water is greater than 150 °; Have antifouling preferably, antirust, erosion-resisting ability and durability; Can improve the service life of aluminum or aluminum alloy preferably, widen its application.
2. the present invention is when reducing hydrophobic properties of the surface, and the polarity of utilizing coupling agent or improving organic coating has significantly improved the adhesion of organic coating.
3. preparation method of the present invention is simple, easy operating, with low cost, and the reagent that uses is harmless, free from environmental pollution.The super-hydrophobicity of sample reduces hardly after 6 months.
The specific embodiment
Through following embodiment the present invention is described further, but embodiment of the present invention is not limited to this.
Embodiment 1
The PP GRANULES of getting the 0.5g maleic anhydride graft adds in the 30ml absolute ethyl alcohol, is heated to 100 ~ 140 ℃ and stir it is fully dissolved, and adds 0.1g silane coupler KH550 subsequently and obtains the maleic anhydride inoculated polypropylene mixed liquor A.Get the 1g PP GRANULES and add in the 30ml absolute ethyl alcohol, be heated to 100 ~ 140 ℃ and stir and it is fully dissolved obtain the polypropylene solution B.
Aluminium alloy sheet is used the abrasive paper for metallograph roughened surface, and ultrasonic cleaning 5min in water cleans 10min subsequently in acetone, use distilled water drip washing 5min at last.
With handling 30min in the immersion of the aluminium alloy sheet after the cleaning chemical corrosion liquid, treatment temperature is 23 ℃.The chemical corrosion liquid that is adopted is the nitric acid of 25wt%.
With The tape casting the A solution of preparation being spread on the aluminium alloy sheet surface, is 65% in relative humidity, and temperature is dry 8h under 23 ℃ the environment.After the same method B solution is spread on sample subsequently, promptly got the aluminium alloy super-hydrophobic surface coating after the drying.Contact angle through test water droplet and aluminium alloy sheet surface is 156 °.The gained style still shows better hydrophobic after 6 months, the test contact angle is 154 °.
Embodiment 2
The PP GRANULES of getting the 1g maleic anhydride graft adds in the 30ml absolute ethyl alcohol, is heated to 100 ~ 140 ℃ and stir it is fully dissolved, and adds the 0.05g coupling agent subsequently and obtains the maleic anhydride inoculated polypropylene mixed liquor A.Get the 1g PP GRANULES and add in the 30ml absolute ethyl alcohol, be heated to 100 ~ 140 ℃ and stir and it is fully dissolved obtain the polypropylene solution B.
Aluminium sheet is used the abrasive paper for metallograph roughened surface, and ultrasonic cleaning 5min in water cleans 5min subsequently in acetone, use distilled water drip washing 3min at last.
With handling 15min in the immersion of the aluminium sheet after the cleaning chemical corrosion liquid, treatment temperature is 23 ℃.The chemical corrosion liquid that is adopted is the sulfuric acid of 20wt%.
With The tape casting the A solution of preparation being spread on surface of aluminum plate, is 65% in relative humidity, and temperature is dry 8h under 23 ℃ the environment.After the same method B solution is spread on sample subsequently, promptly got the aluminium sheet super-hydrophobic surface coating after the drying.Contact angle through test water droplet and surface of aluminum plate is 153 °.Sample still has same hydrophobicity after 6 months.
Claims (3)
1. method of making a kind of durable super-hydrophobic coat in aluminium and aluminum alloy surface, it is characterized by: said organic coating main body is maleic anhydride inoculated polypropylene and polyacrylic composite coating.
2. method according to claim 1 is characterized in that the auxiliary reagent organo-aluminium that adopts, a kind of or combination in the silane coupler.
3. can be a kind of or combination in aluminium isopropoxide, trialkylaluminium, the dialkylaluminum chloride according to organo-aluminium described in the claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012100331679A CN102527619A (en) | 2012-02-15 | 2012-02-15 | Preparation method for durable aluminum and aluminum alloy superhydrophobic surface coating |
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| CN2012100331679A CN102527619A (en) | 2012-02-15 | 2012-02-15 | Preparation method for durable aluminum and aluminum alloy superhydrophobic surface coating |
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| CN102527619A true CN102527619A (en) | 2012-07-04 |
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| CN2012100331679A Pending CN102527619A (en) | 2012-02-15 | 2012-02-15 | Preparation method for durable aluminum and aluminum alloy superhydrophobic surface coating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217785A (en) * | 2014-09-17 | 2014-12-17 | 国家电网公司 | Aluminum stranded conductor capable of delaying icing and having low ice adhesion force and preparation method thereof |
| CN107652823A (en) * | 2017-09-26 | 2018-02-02 | 深圳市冠为科技股份有限公司 | A kind of ink barrel and its manufacture method |
Citations (3)
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|---|---|---|---|---|
| CN101759926A (en) * | 2008-10-29 | 2010-06-30 | 张明亮 | Polar modified polypropylene and preparation method thereof |
| WO2011011705A2 (en) * | 2009-07-24 | 2011-01-27 | Dow Global Technologies Inc. | A coated container device, method of making the same |
| CN102229125A (en) * | 2011-05-05 | 2011-11-02 | 湖南工业大学 | Novel method for preparing super-hydrophobic surface by utilizing polypropylene sheets |
-
2012
- 2012-02-15 CN CN2012100331679A patent/CN102527619A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101759926A (en) * | 2008-10-29 | 2010-06-30 | 张明亮 | Polar modified polypropylene and preparation method thereof |
| WO2011011705A2 (en) * | 2009-07-24 | 2011-01-27 | Dow Global Technologies Inc. | A coated container device, method of making the same |
| CN102229125A (en) * | 2011-05-05 | 2011-11-02 | 湖南工业大学 | Novel method for preparing super-hydrophobic surface by utilizing polypropylene sheets |
Non-Patent Citations (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217785A (en) * | 2014-09-17 | 2014-12-17 | 国家电网公司 | Aluminum stranded conductor capable of delaying icing and having low ice adhesion force and preparation method thereof |
| CN104217785B (en) * | 2014-09-17 | 2017-07-11 | 国家电网公司 | It is a kind of to delay icing, the aluminum stranded conductor with low ice adhesion and preparation method thereof |
| CN107652823A (en) * | 2017-09-26 | 2018-02-02 | 深圳市冠为科技股份有限公司 | A kind of ink barrel and its manufacture method |
| CN107652823B (en) * | 2017-09-26 | 2019-11-05 | 深圳市冠为科技股份有限公司 | A kind of ink barrel and its manufacturing method |
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Application publication date: 20120704 |