Abrasion-resistant, stable and flame-resistant superhydrophobic/superoleophobic coating, and preparation and application thereof

A preparation method for a superhydrophobic/superoleophobic flame-resistant and abrasion-resistant coating material, comprising:

• spraying a superhydrophobic/superoleophobic suspension onto a surface of a horizontally placed substrate with a spray gun at a distance of 15 cm in a vertical direction, and then drying the surface in an oven at 120° C. for 6 h;
• and finally obtaining the superhydrophobic/superoleophobic flame-resistant and abrasion-resistant coating material, wherein
• a preparation method for the superhydrophobic/superoleophobic suspension comprises the following steps:
• S1, dispersing 15 nm SiO2, 50 nm SiO2 and 25 μm α-cellulose in a mixed solution containing anhydrous ethanol and ammonia, and performing ultrasonic treatment for 30 min;
• S2, dropwise adding tetraethyl orthosilicate and perfluorooctane trimethoxy silane to the solution formed in step S1, and stirring the same for 6 h in a water bath at 60° C. to obtain solution A;
• S3, dissolving bisphenol A epoxy resin in the anhydrous ethanol solution, and performing ultrasonic oscillation for 30 min to obtain solution B;
• S4, adding solution B to solution A in the water bath at 60° C.;
• after full mixing, quickly injecting the tetraethyl orthosilicate and the perfluorooctane trimethoxy silane into the suspension;
• and stirring the same at 60° C. for 2 h to obtain solution C, a volume ratio of solution B to solution A being solution A:solution B=8:1;
• S5, adding a fluorine-containing curing agent into anhydrous ethanol, and dissolving the fluorine-containing curing agent with ultrasonic waves to obtain solution D;
• and
• S6, adding solution D into solution C, and stirring the same for 20 min;
• and after full mixing, adding a flame retardant, and stirring the same to obtain a final uniform solution, a volume ratio of solution D to solution C being solution C:solution D=48:5, and the flame retardant being 9,10-dihydro-9-oxa-10-phosphophenanthrene-10-oxide (DOOP);
• a preparation method for the fluorine-containing curing agent comprises the following steps:
• 1) Respectively dissolving heptafluorobutyric acid and 3-(2-aminoethylamino) propyltrimethoxysilane in deionized water;
• 2) Dropwise adding the heptafluorobutyric acid solution to the 3-(2-aminoethylamino) propyltrimethoxysilane solution;
• and
• 3) after the dropwise adding is completed, heating the solution to obtain light yellow colloid which is a fluorine-containing curing agent.