A method for rapid preparation of biomimetic superhydrophobic surfaces of titanium alloys by femtosecond laser

A super-hydrophobic surface, femtosecond laser technology, used in laser welding equipment, manufacturing tools, welding equipment and other directions, can solve the problems of adverse effects on the operator's environment, cumbersome processes, etc., to achieve excellent and durable super-hydrophobic performance, simple process, easy-to-achieve effects

Active Publication Date: 2022-07-12
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods are generally cumbersome, or use concentrated acid and alkali, which will adversely affect the operator and the environment.

Method used

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  • A method for rapid preparation of biomimetic superhydrophobic surfaces of titanium alloys by femtosecond laser
  • A method for rapid preparation of biomimetic superhydrophobic surfaces of titanium alloys by femtosecond laser
  • A method for rapid preparation of biomimetic superhydrophobic surfaces of titanium alloys by femtosecond laser

Examples

Experimental program
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Embodiment 1

[0042] A method for rapidly preparing a biomimetic superhydrophobic surface of a titanium alloy by using a femtosecond laser, the steps are as follows:

[0043] S1. Pretreatment: Pretreatment of titanium alloy surface, including rough grinding, fine grinding, polishing and cleaning of titanium alloy surface;

[0044] S2. Laser etching: Femtosecond laser is used to perform laser etching on the surface of the titanium alloy after pretreatment, and a dual-scale micro-nano structure is formed on the surface of the titanium alloy, that is, an ordered periodic micro-scale emulsion is formed on the surface of the titanium alloy. Protruding structure, the papillary-like structure is densely distributed with nano-scale particle rod-like structure, and after laser etching, the molten particles or impurity particles ablated on the surface of the titanium alloy are removed by cleaning;

[0045] The specific parameters of the laser etching are: the laser wavelength is 1030 nm, the laser sp...

Embodiment 2

[0051] A method for rapidly preparing a biomimetic superhydrophobic surface of a titanium alloy by using a femtosecond laser, the steps are as follows:

[0052] S1. Pretreatment: Pretreatment of titanium alloy surface, including rough grinding, fine grinding, polishing and cleaning of titanium alloy surface;

[0053] S2. Laser etching: Femtosecond laser is used to perform laser etching on the surface of the titanium alloy after pretreatment, and a dual-scale micro-nano structure is formed on the surface of the titanium alloy, that is, an ordered periodic micro-scale emulsion is formed on the surface of the titanium alloy. Protruding structure, the papillary-like structure is densely distributed with nano-scale particle rod-like structure, and after laser etching, the molten particles or impurity particles ablated on the surface of the titanium alloy are removed by cleaning;

[0054] The specific parameters of the laser etching are: the laser wavelength is 1030 nm, the laser sp...

Embodiment 3

[0058] This embodiment is basically the same as the second embodiment, and the only difference is the laser etching parameters in step S2.

[0059] In this example, the specific parameters of the laser etching in step S2 are: the laser wavelength is 1030 nm, the laser spot size is 30 μm, the laser pulse width is 275 fs, the single pulse energy is 3.4 μJ, the frequency is 700 kHz, the scanning speed is 700 mm / s, and the scanning speed is 700 mm / s. The pitch was 10 μm, the number of scans was 30, and the scan path was grid-like.

[0060] The static contact angle of the titanium alloy surface prepared in this example was measured on a contact angle meter, and the static contact angle was 151.2°, which met the requirement of superhydrophobic surface.

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Abstract

A method for rapidly preparing a bionic superhydrophobic surface of a titanium alloy by using a femtosecond laser. The steps are as follows: S1. Pretreatment on the surface of the titanium alloy; S2. Laser etching is performed on the surface of the titanium alloy by using a femtosecond laser. Forming a dual-scale micro-nano structure, that is, an ordered periodic micro-scale papillary-like structure is formed on the surface of the titanium alloy, and the nano-scale particle rod-like structure is densely distributed on the papillary-like structure. After laser etching, the titanium alloy is removed by cleaning. Molten particles or impurity particles ablated on the surface; the specific parameters of laser etching are: laser pulse width of 275fs, single pulse energy of 3.1-3.6μJ, frequency of 50-900kHz, scanning speed of 50-900mm / s, scanning spacing is 10-50μm, the number of scans is 10-30 times, and the scanning path is grid-like; S3, place the laser-etched titanium alloy in a holding furnace at 130-170°C for 7.5h-8.5h, take it out and clean it Removes ablative debris or contamination from titanium alloy surfaces. The method of the invention can simply and efficiently realize the preparation of the biomimetic super-hydrophobic surface of the titanium alloy.

Description

technical field [0001] The invention relates to a method for rapidly preparing a biomimetic super-hydrophobic surface of a titanium alloy by utilizing femtosecond laser etching combined with aging treatment, and belongs to the technical field of surface modification of metal substrates. Background technique [0002] As an alloy developed in the 1950s, titanium alloys are widely used in aerospace, marine ships, automobiles, medical and other fields. Titanium alloys have many high-quality characteristics: for example, the density of titanium alloys is only six tenths of that of steel, and it has good biocompatibility. It also has low elastic modulus and high hardness, low density and high specific strength, and good low temperature. performance and high temperature performance. Titanium alloys will inevitably encounter problems such as dust accumulation, ice and snow, bioadhesion and corrosive environments during application. If a superhydrophobic surface is prepared on the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/352B23K26/06B23K26/0622B23K26/362B23K26/60B23K26/70B23K26/40B23K103/14
CPCB23K26/355B23K26/0624B23K26/362B23K26/0626B23K26/60B23K26/70B23K26/40B23K2103/14
Inventor 庄园刘建宇杨涛汪远曾俊彦
Owner SOUTHWEST JIAOTONG UNIV
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