A kind of super-lyophobic three-dimensional self-supporting body and preparation method thereof
A super-lyophobic and support technology, which is applied in the field of super-lyophobic three-dimensional self-support and its preparation, can solve the problems of unsatisfactory substrate binding force and wear resistance, and achieve excellent repelling and spreading effects, strong wear resistance, easy-to-use effects
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Embodiment 1
[0036] Vinyl-terminated polydimethylsiloxane and polydimethylsiloxane-4,4'-diphenylmethane diisocyanate are mixed at a mass ratio of 5:3 to form a continuous phase, and the continuous phase Mix with the curing agent dibutyltin dilaurate at a mass ratio of 100:9; mix the cationic fluorine-containing polyacrylate aqueous solution with a mass concentration of 11% and silica nanoparticles at a mass ratio of 10:1 to form dispersed phase;
[0037] Drop the dispersed phase into the continuous phase at a speed of 10s / drop under stirring at 1500rpm to form an emulsion. The mass ratio of the continuous phase to the dispersed phase is 20:7;
[0038] Transfer the emulsion into a glass test tube; without a cover, vacuumize at room temperature for 30 minutes to defoam; with a cover, solidify the emulsion at 80°C for 60 minutes; without a cover, dehydrate at 120°C for 3 hours, and detach from the glass test tube to obtain a super-oleophobic three-dimensional self-supporting body, the scanni...
Embodiment 2
[0040] The methoxy-terminated polydimethylsiloxane and polydimethylsiloxane-polyarylether are mixed in a mass ratio of 5:6 to form a continuous phase, and the continuous phase is mixed in a mass ratio of 100:7 with Mix the curing agent polyalkoxysilane; stir and mix water and aluminum oxide nanoparticles at a mass ratio of 10:3 to form a dispersed phase;
[0041] Drop the dispersed phase into the continuous phase at a speed of 30 s / drop while stirring at 1000 rpm to form an emulsion. The mass ratio of the continuous phase to the dispersed phase is 20:15;
[0042] Transfer the emulsion into a glass test tube; without a cover, vacuumize at room temperature for 20 minutes to remove bubbles; with a cover, solidify the emulsion at 65°C for 100 minutes; without a cover, dehydrate at 150°C for 2 hours, and detach from the glass test tube to obtain a superhydrophobic three-dimensional self-supporting body .
Embodiment 3
[0044] Aminopropyl-terminated polydimethylsiloxane and polydimethylsiloxane-isophorone diisocyanate are mixed at a mass ratio of 5:2 to form a continuous phase, and the continuous phase is mixed at a mass ratio of 100 : 9 mixed with the curing agent tetraethyl orthosilicate; the anionic fluorine-containing polyacrylate aqueous solution with a mass concentration of 15% and titanium dioxide nanoparticles were stirred and mixed at a mass ratio of 10:7 to form a dispersed phase;
[0045] Drop the dispersed phase into the continuous phase at a speed of 120 s / drop under stirring at 3000 rpm to form an emulsion, and the mass ratio of the continuous phase to the dispersed phase is 20:3;
[0046] Transfer the emulsion into a glass test tube; without a cover, vacuumize at room temperature for 120 minutes to remove bubbles; with a cover, solidify the emulsion at 50°C for 150 minutes; without a cover, dehydrate at 180°C for 1.5 hours, and detach from the glass test tube to obtain a superhy...
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