PDMS-based bionic sharkskin replica super-hydrophobic surface and preparation method thereof

A technology of super-hydrophobic surface and shark skin, applied in the field of super-hydrophobic surface and its preparation, can solve the problems of high cost, poor mechanical stability, complicated preparation process, etc., and achieve the effects of low cost, controllable thickness and simple process

Active Publication Date: 2019-04-19
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many methods for preparing superhydrophobic surfaces, such as solution immersion method, chemical corrosion metho

Method used

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  • PDMS-based bionic sharkskin replica super-hydrophobic surface and preparation method thereof

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Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with structural drawings and embodiments.

[0029] a) In order to ensure the accuracy of the shark skin replica, the shark skin must first be pretreated. When pre-treating the subcutaneous tissue of shark skin, two points must be ensured: one is to ensure that the thickness of the shark skin should be uniform, and the other is not to damage the microstructure of the shark skin surface.

[0030] b) After the shark skin subcutaneous tissue is processed, the shark skin should be ultrasonically cleaned and dried. During the drying process, the shark skin should be rigidly fixed to avoid deformation during the drying process. If there is any remaining unused shark skin, it should be soaked in formalin solution to prevent it from rotting and deteriorating.

[0031] c) When copying the mold for the first time, use the pretreated sharkskin as a template for the first mold, and fix it with a baffle higher t...

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Abstract

The invention discloses a PDMS-based bionic sharkskin replica super-hydrophobic surface and a preparation method thereof and belongs to the technical field of hydrophobic surface preparation. According to the PDMS-based bionic sharkskin replica super-hydrophobic surface and the preparation method thereof, a sharkskin replica is obtained through twice mold changing of PDMS with a sharkskin as a template, and the surface of the sharkskin replica has a micron-scale groove structure; the PDMS sharkskin replica is put above a flame of an alcohol lamp or a lighter to be subjected to uniform combustion treatment, so that nano-particles generated during combustion are deposited on the PDMS sharkskin replica to enable the surface structure to become a micro-nano structure, and finally, the PDMS sharkskin replica is subjected to heating treatment. According to the super-hydrophobic surface preparation method provided by the invention, the contact angle of liquid drops is greater than 150 degrees, the rolling angle of the liquid drops is less than 10 degrees, and the material shows the super-hydrophobic property. The PDMS-based bionic sharkskin replica super-hydrophobic surface is simple in process, low in cost and easy to control and has good application prospects in the fields such as fog and ice prevention, self-cleaning, resistance reduction and oil-water separation.

Description

technical field [0001] The invention relates to a superhydrophobic surface based on polydimethylsiloxane (Polydimethylsiloxane, PDMS for short) bionic shark skin replica and a preparation method thereof, belonging to the technical field of hydrophobic surface preparation. Background technique [0002] A superhydrophobic surface refers to a surface with a liquid (usually water) contact angle greater than 150° and a rolling angle less than 10°. Its two typical characteristics are a special micro-nano structure and low surface energy. Since the contact surface between the superhydrophobic surface and water droplets is extremely small and the water droplets are easy to roll off the surface, in addition to the self-cleaning function, the superhydrophobic surface is also anti-fog and anti-icing, anti-corrosion, oil-water separation, fluid drag reduction, etc. It has wide application value. [0003] Two conditions must be met to prepare a superhydrophobic surface: one is to constr...

Claims

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Application Information

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IPC IPC(8): B29C69/00B29C33/38B29C33/42B29C39/02B29C59/08B29K83/00
CPCB29C33/3842B29C33/42B29C39/026B29C59/08B29C69/00B29K2083/00
Inventor 刘赵淼田琦李梦麒逄燕
Owner BEIJING UNIV OF TECH
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