A kind of montmorillonite-based photocatalytic superhydrophobic coating and preparation method thereof
A technology of super-hydrophobic coating and montmorillonite, applied in antifouling/underwater coatings, coatings, paints containing biocides, etc., can solve the problems of difficult to achieve aesthetic effects, high preparation cost, and the cleaning performance needs to be improved, etc. To achieve the effect of superior self-cleaning performance, low cost, and easy to be widely used
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Embodiment 1
[0038] A preparation method of montmorillonite-based photocatalytic superhydrophobic coating, comprising the following steps:
[0039] (1) Add 3 g of original montmorillonite and 120 g of deionized water to the beaker, stir at room temperature for 30 minutes, then add 0.1 mol / L sodium hydroxide solution dropwise to adjust the pH to 12, and stir and react at 60°C for 3 hours, Finally, 10.35 mmol of octadecyltrimethylammonium bromide was added to continue the reaction for 3 hours, and then washed three times with deionized water and several times with ethanol / water solution with a volume ratio of 1:1 until the solution was washed with 0.1mol / L If the silver nitrate solution fails to detect impurity ions such as bromide ions and chloride ions, the washing is stopped, and then it is placed in a vacuum oven at 60°C to dry for 24 hours to obtain intercalation-modified montmorillonite. figure 1 It is the XRD spectrum of montmorillonite before and after the modification of the present...
Embodiment 2
[0047] (1) Add 3 g of original montmorillonite and 150 g of deionized water to the beaker, stir at room temperature for 30 minutes, then add 0.1 mol / L sodium hydroxide solution dropwise to adjust the pH to 7, and stir and react at 90° C. for 1 hour, Finally, 3.45 mmol of hexadecyltrimethylammonium bromide was added to continue the reaction for 1 hour, and then washed three times with deionized water and several times with ethanol / water solution with a volume ratio of 1:1 until the solution was washed with 0.1 mol / L If the silver nitrate solution fails to detect impurity ions such as bromide ions and chloride ions, stop washing, and then place it in a vacuum drying oven at 60°C for 24 hours to obtain intercalation-modified montmorillonite;
[0048] (2) Add 4g of intercalation-modified montmorillonite to 120ml of absolute ethanol, stir at room temperature for 30 minutes to obtain a uniformly dispersed mixed solution, then add 4g of perfluorodecyltriethoxysilane at 90°C Stir the ...
Embodiment 3
[0053] (1) Add 3 g of original montmorillonite and 60 g of deionized water to the beaker, stir at room temperature for 30 minutes, then add 0.1 mol / L sodium hydroxide solution dropwise to adjust the pH to 9, and stir and react at 80°C for 2 hours, Finally, 6.9 mmol cetylpyridinium chloride was added to continue the reaction for 2 hours, and then washed three times with deionized water and several times with ethanol / water solution with a volume ratio of 1:1, until it was washed with 0.1 mol / L silver nitrate solution Stop washing if impurity ions such as bromide ions and chloride ions are not detected, and then place it in a vacuum oven at 60°C for 24 hours to obtain intercalation-modified montmorillonite;
[0054] (2) Add 4g of intercalation-modified montmorillonite to 120ml of absolute ethanol, stir at room temperature for 30 minutes to obtain a uniformly dispersed mixed solution, then add 0.4g of perfluorodecyltriethoxysilane at 75°C Stirring reaction in medium temperature fo...
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