Method for preparing super-hydrophobic coating
A technology of super-hydrophobic coating and ammonia water, which is applied in the direction of coating, etc., can solve the problems of unfriendly environment, fluorine content, high cost of super-hydrophobic coating, etc., and achieve the effect of superior performance, low cost and simple operation
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Embodiment 1
[0021] Example 1 Superhydrophobic coating prepared by TEOS with different molar concentrations
[0022] Prepare two groups of ethyl orthosilicate with molar concentrations of 0.47 mol / L and 0.66 mol / L in the super-hydrophobic stock solution, respectively, and add them to 32 mL of ammonia water and absolute ethanol (the volume ratio of the two is 1:15). Stir in the solution for 2h, then add dropwise 1ml of tannin aqueous solution and stir for 60min, then add HMDS and stir for 30min, the molar concentration in the superhydrophobic stock solution is 0.12mol / L. Apply the solutions prepared by the above two schemes on the paper and dry it, then use the ink to do the wettability test, such as figure 1 As shown in Figure (a) the molar concentration of ethyl orthosilicate is 0.47mol / L, and Figure (b) is the molar concentration of ethyl orthosilicate is 0.66mol / L. And the contact angles of the samples made by the two schemes are as follows figure 2 As shown, the contact angles on th...
Embodiment 2
[0023] Example 2 Superhydrophobic coating prepared by different volumes of tannic acid aqueous solution
[0024] Two groups of ethyl orthosilicate with a molar concentration of 0.47mol / L in the superhydrophobic stock solution were added to the mixture of 32mL ammonia water and absolute ethanol (the volume ratio of the two was 1:15) and stirred for 2h, and then Add 1ml and 1.5ml of tannin aqueous solutions dropwise and stir for 60min, then add HMDS and stir for 30min, the molar concentration of which in the superhydrophobic stock solution is 0.12mol / L. Apply the solutions prepared by the above two schemes on the glass and dry it, then use methyl orange to do the wettability test. image 3 As shown, a) the picture shows that the volume of the tannic acid aqueous solution is 1ml, and b) the picture shows that the volume of the tannic acid aqueous solution is 1.5ml. In addition, the water bead bouncing test results of the coatings made of these two concentrations of sols on glass...
Embodiment 3
[0025] Example 3 Superhydrophobic coating prepared by HMDS with different molar concentrations
[0026] Two groups of tetraethyl orthosilicate with a molar concentration of 0.67 mol / L in the superhydrophobic stock solution were added to 32 mL of a mixture of ammonia water and absolute ethanol (the volume ratio of the two was 1:15) and stirred for 2 hours, and then respectively A 1.5ml aqueous solution of tannic acid was added dropwise and stirred for 60 minutes, then HMDS with a molar concentration of 0.12 mol / L and 0.17 mol / L in the superhydrophobic stock solution were added and stirred for 30 minutes. Apply the solutions prepared by the above two schemes on a paper sheet and dry it, then use methyl orange to do the wettability test. Figure 7 As shown, a) the figure shows that the molar concentration of HMDS is 0.12mol / L, b) the figure shows that the molar concentration of HMDS is 0.17mol / L; and the contact angles of the samples made by the two schemes are as follows Figur...
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