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Preparation method of durable underwater ultra oleophobic surface of titanium alloy matrix

An underwater superoleophobic and titanium alloy technology is applied in the field of surface treatment of metal materials, which can solve the problems of environmental pollution of chemical reagents, harmful operators, and the need for special instruments, and achieves simple and easy operation, low cost and little harm. Effect

Active Publication Date: 2015-11-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The surface prepared by the above method on the metal substrate has good underwater superoleophobic properties, but there are some shortcomings, such as the use of chemical reagents that pollute the environment, require special instruments, are harmful to operators, and take a long time to prepare, etc.

Method used

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  • Preparation method of durable underwater ultra oleophobic surface of titanium alloy matrix
  • Preparation method of durable underwater ultra oleophobic surface of titanium alloy matrix
  • Preparation method of durable underwater ultra oleophobic surface of titanium alloy matrix

Examples

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Embodiment 1

[0020] (1) Pretreatment process: Polish the titanium alloy sheet (20mm×30mm×3mm) with No. 1500 metallographic sandpaper, and then put it into acetone, absolute ethanol, and deionized water for ultrasonic cleaning for 3 minutes;

[0021] (2) Electrochemical etching: the pretreated titanium alloy sheet is used as the anode, and the graphite plate with the same area as the titanium alloy sheet is used as the cathode, where the actual effective size (etched area) is 20mm×20mm, and the remaining part is used for mounting Clamp and conduction, two electrodes are placed parallel and symmetrical, the anode is connected to the positive pole of the DC power supply through a wire, the cathode is connected to the negative pole, and the two electrodes are placed in a mixture of 0.5mol / LNaCl and 0.5mol / LH 2 o 2 In the mixed neutral electrolyte solution, turn on the power to start electrochemical etching, and the etching current density is constant at 1A / cm 2 , the etching time is 15min, th...

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Abstract

The invention discloses a preparation method of a durable underwater ultra oleophobic surface of a titanium alloy matrix, and belongs to the technical field of surface treatments of metallic materials. The preparation method comprises the following steps: performing electro chemical etching on the surface of a titanium alloy piece under a constant current density in a neutral electrolyte consisting of NaCl and H2O2 so as to prepare micron-grade concave pits and a cavity structure; after the electro chemical etching is completed, putting the titanium alloy piece into deionized water so as to perform ultrasonic cleaning; and taking out the titanium alloy piece after the ultrasonic cleaning, and placing the taken titanium alloy piece into water so as to obtain the underwater ultra oleophobic surface of the titanium alloy matrix. A contact angle between the prepared underwater ultra oleophobic surface on the titanium alloy matrix and dichloromethane in the water is 158.9 degrees, a rolling angle is smaller than 10 degrees, and the surface has good characteristics of underwater durability and corrosion resistance. The method is simple in technology, low in cost and pollution-free to environment and can be used for underwater oil pollution resistance and underwater corrosion resistance of the titanium alloy surface.

Description

technical field [0001] The invention relates to a method for preparing a durable underwater super-oleophobic surface of a titanium alloy substrate, belonging to the technical field of metal material surface treatment. Background technique [0002] The underwater superoleophobic surface refers to the surface on which the contact angle of oil droplets is greater than 150 and the rolling angle is less than 10 degrees in the oil / water / solid three-phase system. Normally, ordinary superoleophobic surfaces do not have underwater superoleophobic properties. Once placed in water, the surface will lose its superoleophobicity and become an oleophilic surface. The underwater super-oleophobic surface has the characteristics of self-cleaning in water, anti-oil pollution, and corrosion resistance. Applications in fields such as oil-water separation. [0003] In general, the two key factors for the preparation of underwater superoleophobic surfaces are the hydrophilic chemical composition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25F3/08
Inventor 孙玉文王莉莉高玉泽郭东明
Owner DALIAN UNIV OF TECH
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