Method for preparing super-hydrophobic surface material with adjustable contact angle by one-step laser method

A technology of superhydrophobic surface and contact angle, which is applied in the field of preparing superhydrophobic surface materials with adjustable contact angle by one-step laser method, can solve the problems of expensive materials, destroying the contact angle of materials, and time-consuming, and achieves simple, easy-to-operate, Process fast effects

Inactive Publication Date: 2015-04-08
HUBEI POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of cumbersome preparation procedures, long time consumption and expensive materials in the current preparation method of superhydrophobic surface materials, most of the used chemicals are toxic, and the prepared superhydrop

Method used

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  • Method for preparing super-hydrophobic surface material with adjustable contact angle by one-step laser method
  • Method for preparing super-hydrophobic surface material with adjustable contact angle by one-step laser method
  • Method for preparing super-hydrophobic surface material with adjustable contact angle by one-step laser method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Base PTFE sheet pretreatment

[0031] Cut the polytetrafluoroethylene sheet with a thickness of 2mm into circular pieces with a diameter of 2cm, and process 4 samples at the same time, then put them in acetone, absolute ethanol and deionized water in sequence, and use an ultrasonic cleaner to ultrasonically clean them for 5 minutes , to remove impurities such as organic matter and inorganic matter on the surface of the substrate, and then put it in an oven and dry it at 60°C to prepare for laser processing;

[0032] (2) Set CO 2 Process parameters of laser engraving machine

[0033] Use a carbon dioxide gas laser with a wavelength of 10.6μm, turn on the laser engraving machine, set the spot diameter to 0.1mm, the engraving speed to 20mm / s, the frequency to 80KHZ, the spot engraving time to 1ms, the power to 20%, and the number of engravings to 5 times; The rated output power of the laser is 10W;

[0034] (3) Use laser operating software for engraving

[0035]Tak...

Embodiment 2

[0038] Get the remaining 3 cut and cleaned polytetrafluoroethylene substrate sheets in Example 1 and place them on the sample table of the laser engraving machine. Other parameters are set with the same as in Example 1. times, 50 times, the prepared superhydrophobic surface samples such as Figure 5 As shown, from left to right are samples engraved 5, 10, 20, and 50 times. The water droplets are basically spherical on the surface, and the above samples are all super-hydrophobic. The surface tumbles off.

[0039] After inspection, the contact angles of the superhydrophobic surfaces with engraving times of 5, 10, 20 and 50 times were 167°, 165°, 165°, and 163° in turn, all of which were superhydrophobic surfaces. After half a year of long-term storage in laboratory conditions or outdoor environments, the contact angle of the material remains basically unchanged, and it still maintains good super-hydrophobic properties and good stability. It also shows that when other parameters...

Embodiment 3

[0041] (1) Base PTFE sheet pretreatment

[0042] Cut the polytetrafluoroethylene plate with a thickness of 2mm into a square of 1cm×1cm, and process 6 samples at the same time, and then put them in acetone, absolute ethanol and deionized water in sequence, and use an ultrasonic cleaner to ultrasonically clean them for 5 minutes to remove Impurities such as organic matter and inorganic matter on the surface of the substrate are then placed in an 80°C oven for drying, ready for laser processing;

[0043] (2) Set CO 2 Process parameters of laser engraving machine

[0044] Use a carbon dioxide gas laser with a wavelength of 10.6μm, turn on the laser engraving machine, set the spot diameter to 0.1mm, the engraving speed to 20mm / s, the frequency to 80KHZ, the spot engraving time to 0.1ms, the power to 30%, and the number of engravings to 5 times; The rated output power of the laser is 10W;

[0045] (3) Use laser operating software for engraving

[0046] Place the polytetrafluoro...

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Abstract

The invention relates to a method for preparing a super-hydrophobic surface material with an adjustable contact angle by a one-step laser method. The method comprises the following steps: (1) cutting a polytetrafluoroethylene base material and then sequentially placing the polytetrafluoroethylene base material in acetone, absolute ethyl alcohol and deionized water, ultrasonically cleaning for 3-10min respectively and then drying at 50-100 DEG C; (2) setting the spot diameter of a CO2 laser engraving machine to 0.1-0.5mm, setting an engraving speed to 20-40mm/s, setting frequency to 20-80KHZ, setting spot engraving time to 0.1-1ms, setting power to 20-40%, and setting engraving times to 1-5; (3) placing the treated polytetrafluoroethylene base material on the sample platform of the laser engraving machine, controlling a laser device to process a dot matrix or line matrix pattern on the polytetrafluoroethylene base material by laser operation software, and then obtaining the super-hydrophobic surface material provided with a surface with different contact angles. The preparation method disclosed by the invention is simple and rapid, low in cost and environmentally friendly; the prepared super-hydrophobic surface material is stable in structural performance, the contact angle can be manually adjusted with the changes of process parameters, and the method is suitable for industrialized production applications.

Description

technical field [0001] The invention belongs to the field of superhydrophobic materials on solid surfaces, and in particular relates to a method for preparing superhydrophobic surface materials with adjustable contact angles by a one-step laser method. Background technique [0002] The surface of the lotus leaf has the excellent performance of keeping itself clean, and this self-cleaning performance is called the "lotus leaf effect". The discovery of this self-cleaning effect has made its related basic research and application of self-cleaning and anti-pollution materials a hot topic. The study found that the self-cleaning effect of the lotus leaf comes from the superhydrophobicity of its surface. Superhydrophobic surface materials have demonstrated superior properties in terms of self-cleaning, anti-pollution, fluid drag reduction, etc., which have important research, application value and technical significance in basic research and industrial applications, prompting peop...

Claims

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Application Information

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IPC IPC(8): B29C59/16
Inventor 马福民李文卫世超
Owner HUBEI POLYTECHNIC UNIV
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