Preparation method of SiO2/polymer combined superhydrophobic coating
A super-hydrophobic coating, polymer technology, applied in the direction of coating, can solve problems such as unsuitable large area, and achieve the effects of easy control, cheap raw materials, and simple operation
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[0021] Example 1
[0022] A kind of SiO 2 The preparation method of the / PS composite superhydrophobic coating is specifically as follows: adding 1.6 g of polystyrene to 40 ml of tetrahydrofuran, and magnetically stirring until the polystyrene is completely dissolved to obtain a transparent solution. Then add 2.0g DNS-2 type nano silica, ultrasonic for 0.5h, then add 1.0g γ-mercaptopropyltrimethoxysilane, and continue to stir for 3h until the nano silica is evenly dispersed. Take the glass slide as the substrate, adjust the pulling speed of the vertical pulling machine to 318mm / min, pull it into a film, and leave it in the air at room temperature for 1 hour.
[0023] SiO obtained 2 / PS composite superhydrophobic coating SEM and contact angle photos see figure 1 , The measured contact angle is 168.9±2°.
Example Embodiment
[0024] Example 2
[0025] A kind of SiO 2 The preparation method of the / PVC composite super-hydrophobic coating is specifically as follows: adding 1.6 g of polyvinyl chloride to 50 ml of tetrahydrofuran, and magnetically stirring until the polyvinyl chloride is completely dissolved to obtain a transparent solution. Then add 2.4g DNS-2 type nano silica, ultrasonic for 0.5h, then add 1.0g γ-mercaptopropyltrimethoxysilane, and continue stirring for 3h until the nano silica is evenly dispersed. Take the glass slide as the base, adjust the vertical pulling speed of the vertical pulling machine to 318mm / min, pull it into a film, and leave it in the air at room temperature for 1 hour.
[0026] SiO obtained 2 / PVC composite superhydrophobic coating SEM and contact angle photos see figure 2 , The measured contact angle is 169.0±2°.
Example Embodiment
[0027] Example 3
[0028] A kind of SiO 2 The preparation method of the / PMMA composite superhydrophobic coating is specifically: adding 1.6 g of polymethyl methacrylate to 40 ml of tetrahydrofuran, and magnetically stirring until the polymethyl methacrylate is completely dissolved to obtain a transparent solution. Then add 2.0 g DNS-2 type nano silica, ultrasonic for 0.5 h, then add 1.0 g γ-mercaptopropyl trimethoxysilane, and continue to stir for 3 h until the silica is uniformly dispersed. With filter paper as the base, adjust the vertical pulling machine to adjust the pulling speed to 318mm / min, pull it into a film, and leave it in the air at room temperature for 1 hour.
[0029] SiO obtained 2 / PMMA composite superhydrophobic coating SEM and contact angle photos see image 3 , The measured contact angle is 167.6±2°.
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