Durable super-hydrophilic or super-hydrophobic plastic surface and preparation method thereof
A super-hydrophilic and super-hydrophobic technology, applied in the coating and other directions, can solve the problems of not reaching the super-lyophobic state, no test instructions for durability, etc., achieving good industrial application prospects, strong durability, and simple and convenient preparation process. Effect
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Embodiment 1
[0046] The preparation of durable super-hydrophilic plastic surface specifically comprises the following steps:
[0047] (1) Etch micron-scale structures on the surface of plexiglass with a laser etching machine. The etched structure is square in shape, with a side length of 350 µm and a spacing of 700 µm; the parameters of the laser etching machine are: speed 20%, energy 20%;
[0048] (2) Clean the etched sample with ethanol, dry at 50°C, and set aside;
[0049](3) The preparation method of superhydrophilic modified silica (by weight): Take 46 parts of ethyl orthosilicate in 33 parts of ethanol solution, stir at 50 °C for 30 minutes, add 2.6 parts of ammonia water and 7.2 parts of distilled water, continue to stir at constant temperature for 8 hours, add 1.26 parts of heptadecafluorodecyltrimethoxysilane to it, and continue to keep constant temperature for 12 hours; centrifuge the obtained suspension at a speed of 6000 rpm for 10 minutes, and take out the centrifuged product...
Embodiment 2
[0057] (1) Etch the micron structure on the surface of the plexiglass with a laser etching machine. The etched structure is cylindrical in shape, with a diameter of 70 µm and a pitch of 140 µm; the parameters of the laser etching machine are: speed 20%, energy 50 %;
[0058] (2) Clean the etched sample with acetone, dry at 50°C, and set aside;
[0059] (3) The preparation method of superhydrophobic modified nano-silica (by weight): Take 74 parts of tetraethyl orthosilicate in 60 parts of ethanol solution, stir at 30°C for 30 minutes, add 2.6 parts of ammonia water and 0 parts of distilled water, continue to stir at a constant temperature for 3 hours, add 1.1 parts of perfluorodecyltrichlorosilane to it, and continue to keep the temperature for 6 hours; centrifuge the obtained suspension at a speed of 6000 rpm for 10 minutes, and take out the centrifuged product nanometer Silica, cleaned with ethanol, under the same centrifugation conditions, continue to centrifuge and then wa...
Embodiment 3
[0065] (1) Use a laser etching machine to etch the micron structure on the surface of the plexiglass. The etched structure shape is a triangular truss, the side length is 140µm, and the spacing is 280µm; the parameters of the laser etching machine are: speed 20%, Energy 30%;
[0066] (2) Clean the etched sample with ethanol, dry at 50°C, and set aside;
[0067] (3) The preparation method of superhydrophilic modified nano-silica (by weight): Take 46 parts of ethyl orthosilicate in 46 parts of ethanol solution, stir at 25 °C for 30 minutes, add 5.9 parts of ammonia water and 4 parts of distilled water, continue to stir at constant temperature for 3 hours, take 1 part of heptadecafluorodecyltrimethoxysilane, add it, and continue to keep constant temperature for 12 hours; centrifuge the obtained suspension at a speed of 6000 rpm, centrifuge for 10 minutes, take out the centrifuge The product nano-silica is cleaned with ethanol, and under the same centrifugation conditions, the ce...
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