Preparation method of superhydrophobic graphene-based wrinkled film with controllable rebound direction of water droplets
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 the effect of excellent super-hydrophobic properties
Active Publication Date: 2022-03-15
成都泰格尔航天航空科技股份有限公司
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Problems solved by technology
However, there are few studies on the rebound direction of supercooled water droplets after impact
Method used
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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 method for preparing a superhydrophobic graphene-based wrinkled film with a controllable rebound direction of water droplets, which belongs to the field of anti-icing. The invention realizes that the bouncing direction of the cold water droplet can deviate from the surface after being hit, and greatly improves the anti-icing efficiency. The invention transfers the rGO film to the biaxially stretched base film through dry transfer, and sequentially retracts the force in four directions of the base film to obtain an irregular wrinkled film; through the method, SiO is grown on the rGO surface 2 Nanoparticles, and modified by FDTS to obtain SiO with micro-nano hierarchical structure 2 / rGO wrinkled film. The film of the invention has a water contact angle greater than 150° and a rolling angle less than 4° at -20°C, showing excellent low-temperature super-hydrophobic properties. At the same time, at ‑10°C, the supercooled water drop hits the surface of the film, and due to its irregular microstructure, the viscous force distribution between the solid and the liquid is asymmetrical, so the water drop retracts asymmetrically, making the rebound direction in the Offset occurs in a 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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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