Preparation method of photo-thermal super-hydrophobic deicing coating
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A super-hydrophobic and coating technology, which is applied in coatings, chemical instruments and methods, and devices for coating liquids on surfaces, can solve problems such as low efficiency, environmental damage, and high energy consumption, and achieve increased surface roughness, delay The effect of freezing water droplets and reducing the contact area
Pending Publication Date: 2022-07-05
JIANGSU UNIV OF TECH
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[0023] A preparation method of a photothermal superhydrophobic deicing coating mainly comprises the following steps:
[0024] The first step, pretreatment of aluminum sheet: use sandpaper to remove the uneven oxide layer on the surface of the aluminum sheet, ultrasonically clean it with ethanol for 5-10 minutes, and then dry it for later use.
[0025] In the second step, drop the polytetrafluoroethylene suspension into a beaker containing amyl acetate solvent, and ultrasonicate for 5-10min to make it evenly mixed; the mass ratio of the polytetrafluoroethylene suspension to amyl acetate is 1:1-2 .
[0026] In the third step, add Prussian blue and hydrophobic silica into the beaker in turn, stir for 6-24h, and the precursor solution is prepared; the contents of Prussian blue and hydrophobic silica are respectively PTFE suspension and pentyl acetate 1-5% of total ester mass.
[0027] The fourth step is to spray the precursor solution onto the surface of the pretreated aluminum ...
Embodiment 1
[0035] In this embodiment, in the third step, the content of Prussian blue is 3% of the total mass of the polytetrafluoroethylene suspension and amyl acetate, and the content of hydrophobic silica is the total mass of the polytetrafluoroethylene suspension and amyl acetate. 1% of the mass, the prepared precursor solution was sprayed onto the surface of the pretreated aluminum sheet, the contact angle of the water droplet was 163.6±1.5°, and the rolling angle was 8±0.4°.
Embodiment 2
[0037] In this embodiment, in the third step, the content of Prussian blue is 3% of the total mass of the polytetrafluoroethylene suspension and amyl acetate, and the content of hydrophobic silica is the total mass of the polytetrafluoroethylene suspension and amyl acetate. 2% of the mass, the prepared precursor solution was sprayed onto the surface of the pretreated aluminum sheet, the contact angle of the water droplet was 164.5±1.2°, and the rolling angle was 6±0.5°.
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Abstract
The invention discloses a preparation method of a photo-thermal super-hydrophobic deicing coating. The preparation method comprises the following steps: 1, pretreating an aluminum sheet, namely polishing by using abrasive paper to remove a non-uniform oxide layer on the surface of the aluminum sheet; 2, dropwise adding the polytetrafluoroethylene suspension liquid into a beaker containing an amyl acetate solvent, and carrying out ultrasonic treatment for 5-10 minutes to uniformly mix the polytetrafluoroethylene suspension liquid and the amyl acetate solvent; the mass ratio of the polytetrafluoroethylene suspension to the amyl acetate is 1: (1-2); 3, sequentially adding Prussian blue and hydrophobic silicon dioxide into the beaker, and stirring for 6-24 hours to complete the preparation of a precursor solution; the content of the prussian blue and the content of the hydrophobic silicon dioxide are 1-5% of the total mass of the polytetrafluoroethylene suspension and the amyl acetate respectively; fourthly, the precursor solution is sprayed to the surface of the pretreated aluminum sheet, drying is conducted for 1 h at the temperature of 100-150 DEG C, the adhesive force between water drops or wet snow and ice and the surface is reduced through the extremely small dynamic rolling angle of the surface of the coating, and therefore the water drops or the ice can easily fall off under the action of external force such as self gravity or wind power, and accumulation of rain, snow and ice on the surface is delayed or even prevented.
Description
technical field [0001] The invention relates to the technical field of coating materials, in particular to a preparation method of a photothermal superhydrophobic deicing coating. Background technique [0002] Ice formation is an inevitable phenomenon in nature. Ice accretion can seriously disrupt the operation of high-voltage transmission lines, aircraft and wind turbines, resulting in serious economic losses and even loss of human life. To prevent ice accretion, conventional techniques mainly use electrical heat or mechanical force to remove ice from the substrate, or spray chemicals to delay the freezing point of water and make ice grow more slowly. However, the main problems with these technologies are low efficiency and high energy consumption, and may cause damage to the environment. [0003] As a passive anti-icing coating, the superhydrophobic surface has a good anti-icing effect. On the one hand, the excellent hydrophobicity increases the energy barrier between s...
Claims
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