Sprayable super-hydrophobic self-cleaning coating
A self-cleaning, super-hydrophobic technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of time-consuming and labor-consuming, cumbersome preparation process, and inability to preserve, and achieve low cost, low pollution, and easy long-term preservation Effect
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preparation example Construction
[0011] The preparation method of the coating of the present invention: mix reagent-grade acetone, reagent-grade ethyl acetate, and reagent-grade dimethylformamide according to a volume ratio of 1:1:1, then add polyurethane resin and stir evenly, add silane coupling agent, and seal Store in industrial spray bottle A; mix reagent grade acetone, reagent grade ethyl acetate, and reagent grade dimethylformamide in a volume ratio of 1:1:1, then add polytetrafluoroethylene powder and silane coupling agent, and magnetically After stirring evenly, seal and store in industrial spray bottle B.
[0012] Superhydrophobic self-cleaning paint spraying method of the present invention is as follows:
[0013] Before the paint is applied, clean the surface to be sprayed. During implementation, shake the spray bottle A at a constant speed for 30 seconds, and then spray at a position 20-30 cm away from the surface. After waiting for 30 minutes at room temperature, shake the spray bottle B at a c...
Embodiment 1
[0015] Polyurethane resin: 3 grams
[0016] Mixed solvent 1: (5 grams of acetone, 5 grams of ethyl acetate, 5 grams of dimethylformamide) 15 grams
[0017] Silane coupling agent (base material): 0.5g
[0018] Silane coupling agent (filler): 0.5g
[0019] PTFE powder: 5 grams
[0020] Mixed solvent two: (4 grams of acetone, 4 grams of ethyl acetate, 4 grams of dimethylformamide) 12 grams
[0021] According to the ratio of the materials listed in the formula, the super-hydrophobic surface is obtained through the coating preparation and spraying method introduced above. When 2 μL of deionized water is dropped on the superhydrophobic surface, the contact angle is 157°-159°, and the sliding angle is 3°-6°.
Embodiment 2
[0023] Polyurethane resin: 3 grams
[0024] Mixed solvent 1: (5 grams of acetone, 5 grams of ethyl acetate, 5 grams of dimethylformamide) 15 grams
[0025] Silane coupling agent (base material): 0.5g
[0026] Silane coupling agent (filler): 0.5 g
[0027] PTFE powder: 5 grams
[0028] Mixed solvent two: (4 grams of acetone, 4 grams of ethyl acetate, 4 grams of dimethylformamide) 12 grams
[0029] According to the ratio of the materials listed in the formula, the super-hydrophobic surface is obtained through the coating preparation and spraying method introduced above. Drop 2 μL of alkaline solution with a pH value of 14 on the superhydrophobic surface, the contact angle is 152°-155°, and the sliding angle is 7°-9°.
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