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Method for preparing metal titanium or titanium alloy super-oleophobic surface

A technology of titanium alloy and metal titanium is applied in the field of preparation of superoleophobic surface of metal titanium or titanium alloy, which can solve problems such as the difficulty of superoleophobic surface, achieve simple and mature preparation process, improve conveying speed, and reduce water resistance. Effect

Inactive Publication Date: 2011-04-20
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to construct a super-oleophobic surface on the surface of engineering materials titanium and its alloys, and there are no related patents or literature reports so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. With the cleaned metal titanium as the anode and the graphite sheet as the cathode, the metal titanium is mixed with 0.1wt% Na 2 SO 4 Carry out anodic oxidation once in aqueous solution, the oxidation current is 0.1A / cm 2 , the oxidation time is 2h, and after the reaction is completed, the oxide and floating liquid are removed by ultrasonic cleaning, and a titanium-based surface with a micron structure is roughened;

[0023] 2. Use micron-structured roughened titanium as the anode, graphite sheet as the cathode, and 0.1wt% HCl aqueous solution as the electrolyte for secondary anodic oxidation. The oxidation voltage is 10V, the oxidation time is 2 hours, and the temperature is 0-5 ℃, forming a uniform layer of titanium oxide nanotube arrays on the micronized titanium surface to obtain a micro-nano structured titanium surface;

[0024] 3. Spin-coat perfluorooctadecyltrichlorosilane on the micro-nano structured titanium surface for chemical modification, and heat trea...

Embodiment 2

[0027] 1. With the cleaned metal titanium as the anode and the graphite sheet as the cathode, the metal titanium is anodized once in 5wt% NaOH aqueous solution, and the oxidation current is 0.5A / cm 2 , the oxidation time is 1h, and after the reaction is completed, the oxide and floating liquid are removed by ultrasonic cleaning, and a titanium-based surface with a micron structure is roughened;

[0028] 2. Use micron-structured roughened titanium as the anode, graphite sheet as the cathode, and 5wt% HCl ethylene glycol solution as the electrolyte for secondary anodic oxidation. The oxidation voltage is 100V, the oxidation time is 10min, and the temperature is 10°C , forming a layer of uniform titanium oxide nanotube arrays on the micronized titanium surface to obtain a micro-nano structured titanium surface;

[0029] 3. Spin-coat perfluorooctadecyltrichlorosilane onto the dried micro-nano structured titanium surface for chemical modification, and heat-treat at 100°C for 1 hour...

Embodiment 3

[0032] 1. With the cleaned titanium alloy as the anode and the graphite sheet as the cathode, the metal titanium is mixed with 5wt% Na 2 SO 4 Carry out anodic oxidation once in ethylene glycol solution, the oxidation current is 1A / cm 2 , the oxidation time is 0.5h, and after the reaction is completed, the oxide and floating liquid are removed by ultrasonic cleaning, and a titanium-based surface with a micron structure is roughened;

[0033] 2. Use titanium with a rough surface microstructure as the anode, graphite sheet as the cathode, and 0.1wt% HF formamide solution as the electrolyte for secondary anodic oxidation. The oxidation voltage is 20V, the oxidation time is 30min, and the temperature is 0 ℃, forming a uniform layer of titanium oxide nanotube arrays on the micronized titanium surface to obtain a micro-nano structured titanium surface;

[0034] 3. Deposit perfluorooctyl siloxane on the dry micronano-structured titanium surface by vapor deposition method for chemica...

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Abstract

The invention discloses a method for preparing a metal titanium or titanium alloy super-oleophobic surface. The method comprises the following steps of: performing primary anodic oxidation treatment on metal titanium or titanium alloy to obtain a roughened surface with a microstructure; forming a titanium dioxide nanotube array film on the surface with microstructure through secondary anodic oxidation so as to obtain a composite fine structured micro-nanostructure; and modifying with a low-surface-energy substance to obtain the super-oleophobic surface and the super-hydrophobic and super-oleophobic surface. The metal titanium or titanium alloy surface has super-oleophobic and super-hydrophobic characteristics for multiple kinds of organic liquid, the static contact angle is greater than 155 degrees; the rolling angle is less than 10 degrees; meanwhile, the surface also shows superior super-oleophobic and super-hydrophobic characteristics for pure water and aqueous solution of acid, alkali and salt.

Description

technical field [0001] The invention relates to a method for preparing a metal titanium or titanium alloy super-oleophobic surface. Background technique [0002] Wettability is an important property of solid surface, which directly determines the performance and application range of materials. Wettability is primarily determined by the chemical composition and microstructure that make up the solid surface. In recent years, as an ultimate form of wettability, superhydrophobicity has been deeply studied, and many biomimetic superhydrophobic materials have been successfully prepared, and have been initially applied in the fields of self-cleaning, anti-corrosion, anti-fog, etc. . At the same time, oleophobic materials, especially superoleophobic materials, have also attracted much attention, and how to prepare superoleophobic surfaces has gradually become a research hotspot. Compared with superhydrophobic materials, superoleophobic materials will play a more important role in...

Claims

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Application Information

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IPC IPC(8): C25D11/26B05D5/08
Inventor 周峰王道爱刘盈刘维民
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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