A kind of preparation method of superhydrophobic metal matrix composite coating

A metal-based composite, super-hydrophobic technology, applied in coatings, electrolytic coatings, etc., can solve the problems of great harm to the environment and human health, affect the practicability, and large porosity of the super-hydrophobic metal-based composite coating, so as to improve the density. The effect of smoothness, ease of realization, and compact and flat coating

Inactive Publication Date: 2016-01-13
HENAN POLYTECHNIC UNIV
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Problems solved by technology

However, these surfactants are often produced from PFOA (perfluorooctanoic acid) or PFOS (perfluorooctane sulfonate), or are often degraded into PFOA or PFOS, which is harmful to the environment and human health.
Moreover, the superhydrophobic metal-based composite coating obtained above has a large porosity, which affects practicability

Method used

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  • A kind of preparation method of superhydrophobic metal matrix composite coating
  • A kind of preparation method of superhydrophobic metal matrix composite coating

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Embodiment Construction

[0030] Combine below figure 1 and figure 2 The specific implementation process of the present invention - "a method for preparing a super-hydrophobic metal-based composite coating" will be further described.

[0031] (a) Take 100g of polytetrafluoroethylene particles 2 with an average particle size of 0.2 micron (surface area is about 15m 2 / g), 7.5g of cetyltrimethylammonium bromide (CTAB), 0.75g of non-ionic fluorocarbon surfactant FC-4430 were added to 100ml of deionized water, and stirred vigorously at room temperature for 120 minutes to form a water-based suspension.

[0032] (b) Add 100ml of the water-based suspension to the nickel electroplating solution and stir vigorously for 60 minutes to prepare 2L of mixed electrolyte. The composition of nickel electroplating solution is: NiSO 4 ·6H 2 O200g / L, NiCl 2 ·6H 2 O20g / L, HBO 3 30g / L.

[0033] (c) Using a stainless steel sheet as the cathode substrate 1 and an electrolytic nickel plate as the anode, perform elect...

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Abstract

The invention relates to a preparation method of a surface-superhydrophobic metal-base composite coating, belonging to the field of electrochemical deposition. The method mainly comprises the following steps: (a) preparing a water-base suspension containing polytetrafluoroethylene granules (2), cetyl trimethylammonium bromide (CTAB) and nonionic fluorocarbon surfactant FC-4430; (b) while vigorously stirring, proportionally adding the water-base suspension into a nickel electroplating solution to prepare a mixed electrolyte; (c) by using a conductive solid surface as a cathode base (1) and sheet nickel as an anode, carrying out electrophoresis-electrodeposition in the non-stirred mixed electrolyte for 10-15 minutes; stopping the electrophoresis-electrodeposition, and stirring the mixed electrolyte for 1-2 minutes; (d) continuously repeating the step (c) until the thickness of the prepared composite coating (4) achieves the requirement; and (e) flushing and drying the composite coating (4), baking at 260-300 DEG C for 30-60 minutes, and cooling to room temperature. The method is easy to implement and environment-friendly, has the advantages of compact and flat coating and the like, and is suitable for optimizing modification and functionalization of various solid surfaces.

Description

technical field [0001] The invention relates to a method for preparing a metal-based composite coating, in particular to a method for preparing a super-hydrophobic metal-based composite coating. Background technique [0002] Metal-based composite coatings are widely used in many fields of life and production because of their properties that cannot be achieved by certain single metals and alloy materials. There are mainly preparation methods such as powder metallurgy, plasma spraying, composite electrodeposition, and composite plating. Among them, the composite electrodeposition method with simple operation and low implementation temperature has more prominent advantages in some applications. PTFE is often used as the particle phase of metal matrix composites due to its advantages of acid and alkali resistance, various organic solvent resistance, high temperature resistance, almost insoluble in all solvents, and extremely low friction coefficient. [0003] Wettability is one...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/02C25D5/50
Inventor 明平美郝巧玲刘志超包晓慧李慧娟王俊涛张晓东
Owner HENAN POLYTECHNIC UNIV
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