Preparation method of super-hydrophobic graphene-based wrinkled film capable of controlling springback direction of water drops

A graphene-based, super-hydrophobic technology, applied in graphene, chemical instruments and methods, devices for coating liquids on surfaces, etc., can solve the problem of less research on the direction of rebound, and achieve excellent super-hydrophobic properties, bounce direction control effect

Active Publication Date: 2020-02-11
成都泰格尔航天航空科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few studies on the rebound dir

Method used

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  • Preparation method of super-hydrophobic graphene-based wrinkled film capable of controlling springback direction of water drops
  • Preparation method of super-hydrophobic graphene-based wrinkled film capable of controlling springback direction of water drops
  • Preparation method of super-hydrophobic graphene-based wrinkled film capable of controlling springback direction of water drops

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Embodiment 1

[0025] Embodiment 1: The preparation method of the superhydrophobic graphene-based wrinkled film of controllable water drop rebound direction is carried out according to the following steps:

[0026] 1. Preparation of Graphene Oxide

[0027] The preparation is divided into three stages: low-temperature reaction stage: 23mL of concentrated sulfuric acid with a mass concentration of 98% is added to a 250mL beaker, and cooled in an ice-water bath. Then add 1g of natural graphite, stir at 500r / min for 60min, and slowly add 6g of KMnO in 6 equal amounts (the time interval is 5min). 4 , stirred for 3.0h. Medium-temperature reaction stage: transfer the beaker to 40°C, mechanically stir at 600r / min for 40 minutes, and then the solution becomes viscous, and finally the temperature in the water stabilizes at 40°C. High-temperature reaction stage: Transfer to a constant temperature water bath at 80°C for mechanical stirring, add distilled water in 6 times, the first 4 additions are 8mL...

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Abstract

The invention discloses a preparation method of a super-hydrophobic graphene-based wrinkled film capable of controlling the springback direction of water drops, belonging to the field of ice prevention. With the wrinkled film in the invention, the bouncing direction of cold water drops can deviate from a surface after the cold water drops are impacted, so anti-icing efficiency is greatly improved.According to the invention, a rGO film is transferred to a biaxially stretched substrate film through dry transfer, and forces in four directions of the substrate film are sequentially retracted to obtain an irregular wrinkled film; and in virtue of a Stober method, SiO2 nanoparticles grow on the surface of rGO, and the SiO2/rGO wrinkled film with a micro-nano hierarchical structure is obtained through FDTS modification. At -20 DEG C, the water contact angle of the film is still larger than 150 degrees, and the rolling angle of the film is smaller than 4 degrees, so the film shows excellent low-temperature super-hydrophobic characteristics. Meanwhile, at a temperature of -10 DEG C, the supercooled water drops impact the surface of the film, and due to the fact that the irregular microstructure of the supercooled water drops enables the viscous force between solid and liquid to be asymmetrically distributed, the water drops retract asymmetrically, so the springback direction deviates in the fixed direction.

Description

technical field [0001] The invention belongs to the field of anti-icing; in particular, it relates to a preparation method of a superhydrophobic graphene-based wrinkled film with a controllable rebound direction of water droplets. The invention provides a method for preparing a graphene-based irregular wrinkled film with superhydrophobic properties under low-temperature condensation conditions. The film can be used to control the rebound direction of supercooled water droplets after impact. Background technique [0002] Icing brings a series of safety, efficiency and economical problems to aircraft, wind turbine blades, solar panels and heat exchangers, etc. Superhydrophobic surfaces are considered to be one of the ideal strategies in the anti-icing field due to their good water repellency. At present, some progress has been made in the research on the application of superhydrophobic surfaces in the field of anti-icing, mainly focusing on accelerating the rebound of superco...

Claims

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Application Information

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IPC IPC(8): C01B32/184C01B32/194B05D1/18B05D3/04B05D7/04B05D7/24
CPCC01B32/184C01B32/194B05D1/18B05D7/04B05D7/24B05D3/0493
Inventor 矫维成楚振明王荣国赫晓东
Owner 成都泰格尔航天航空科技股份有限公司
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