Preparation method of super-hydrophobic and dust-proof stainless steel filter screen
A stainless steel, super-hydrophobic technology, used in separation methods, chemical instruments and methods, filtration and separation, etc., can solve problems such as the ability to be improved, and achieve excellent bactericidal performance, improved binding, and mild reaction conditions.
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Embodiment 1
[0040] At room temperature, first place a 2cm×2cm stainless steel filter in FeCl 3 / HCl mixed solution (concentrations are 0.2mol / L, 0.05mol / L, respectively) etch for 10min. Wash the above filter until the pH is neutral, remove the solution remaining on the surface, and dry it for later use. Then add the etched filter to 0.1mol / L sodium hydroxide solution at 85°C and soak for 2 hours, so that more hydroxyl groups are attached to the surface of the filter to facilitate modification, take it out and wash until neutral;
[0041] 4.0g hexamethyldisilazane, 3.0g tetraethyl orthosilicate, 0.3g nano-ZnO and 0.4g g-C 3 N 4 Add 5 drops of dibutyltin dilaurate into the mixed solution of 88mL absolute ethanol, 5mL ammonia water and 7mL deionized water, stir for 30min at a stirring rate of 500 rpm, make it evenly mixed, configure the modified solution; finally filter The mesh was soaked in the above mixed solution for 6 hours, and then cured in an oven at 120°C for 8 hours to obtain a ...
Embodiment 2
[0053] At room temperature, first place a 6cm×4cm stainless steel filter in FeCl 3 / HCl mixed solution (concentrations are 1.0 mol / L, 0.06 mol / L, respectively) etch for 10 min. Wash the above filter until the pH is neutral, remove the solution remaining on the surface, and dry it for later use. Then add the etched filter to 0.2mol / L sodium hydroxide solution at 78°C and soak for 2 hours, so that more hydroxyl groups are attached to the surface of the filter to facilitate modification, take it out and wash until neutral;
[0054] 4.5g of octyltriethoxysilane, 2.2g of γ-glycidyl etheroxypropyltrimethoxysilane, 1.6g of sodium silicate, 0.2g of nano-TiO 2 Add 0.6g of ZnO and 6 drops of p-toluenesulfonic acid into a mixed solution of 90mL of absolute ethanol, 2mL of ammonia water and 6mL of deionized water, stir at a stirring rate of 500 rpm for 30min, make it evenly mixed, and configure the modified solution. Finally, soak the filter screen in the above mixed solution for 6 hour...
Embodiment 3
[0056] At room temperature, first place an 8cm×4cm stainless steel filter in FeCl 3 / HCl mixed solution (concentrations are 1.2 mol / L, 0.3 mol / L, respectively) for etching for 5 min. Wash the above filter until the pH is neutral, remove the solution remaining on the surface, and dry it for later use. Then add the etched filter to 0.2mol / L sodium hydroxide solution at 90°C and soak for 2 hours, so that more hydroxyl groups can be attached to the surface of the filter to facilitate modification, take it out and wash until neutral;
[0057] 4.5g octyltriethoxysilane, 2.6g dodecyl tripotassium oxysilane, 1.8g sodium silicate, 0.8gg-C 3 N 4 Add 0.6g of nano-ZnO and 4 drops of dibutyltin dilaurate to a mixed solution of 90mL of absolute ethanol, 2mL of ammonia water and 8mL of deionized water, stir at a stirring rate of 500 rpm for 30min to make it evenly mixed, and configure the modified solution. Finally, soak the filter screen in the above mixed solution for 6 hours, and put ...
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