Preparation method of photocuring type superhydrophobic composite film
A composite membrane and super-hydrophobic technology, applied in the coating and other directions, can solve the problems of unfavorable promotion and implementation, high cost of preparation process, and high requirements for process accuracy, and achieve good hydrophobic effect, simple operation process, and enhanced anti-detachment strength.
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Embodiment 1
[0042] Urethane acrylate prepolymer and photoinitiator 1173 were weighed according to the mass ratio of 98:2, after stirring and ultrasonic (5min) mixing evenly, poured into the tetrafluoroethylene mold, at 223mW / cm 2 The pre-cured elastic substrate was prepared by irradiating under ultraviolet light for 1 s. Weigh the silicone rubber, mercaptosiloxane, and photoinitiator 1173 according to a certain mass ratio, add a certain amount of n-hexane, stir and dissolve to make a solution, then add a certain amount of hydrophobic nano-silica, and ultrasonicate for 30 minutes after stirring. Prepare a suspension; the mass fractions of silicone rubber, mercapto silicone, photoinitiator, silicon dioxide and n-hexane in the suspension are: 5%, 0.6%, 0.05%, 4%, 90.35%, respectively. The suspension was sprayed on the pre-cured elastic substrate and irradiated with ultraviolet light for 30 s to prepare a superhydrophobic elastic composite film.
Embodiment 2
[0044] Urethane acrylate prepolymer and photoinitiator 184 were weighed according to the mass ratio of 95:5, after stirring and ultrasonic (5min) mixing evenly, poured into the tetrafluoroethylene mold, at 223mW / cm 2 The pre-cured elastic substrate was prepared by irradiating with ultraviolet light for 20s. Weigh the silicone rubber, mercaptosiloxane, and photoinitiator 1173 according to a certain mass ratio, add a certain amount of n-hexane, stir and dissolve to make a solution, then add a certain amount of hydrophobic nano-silica, and ultrasonicate for 30 minutes after stirring. Prepare a suspension; the mass fractions of silicone rubber, mercapto silicone, photoinitiator, silicon dioxide and n-hexane in the suspension are: 5%, 0.8%, 0.05%, 3.8%, and 90.35%, respectively. The suspension was sprayed on the pre-cured elastic substrate and irradiated with ultraviolet light for 50 s to prepare a superhydrophobic elastic composite film.
Embodiment 3
[0046] Urethane acrylate prepolymer and photoinitiator TPO were weighed according to the mass ratio of 97:3, after stirring and ultrasonic (5min) mixing evenly, poured into the tetrafluoroethylene mold, at 223mW / cm 2 The pre-cured elastic substrate was prepared by irradiating under ultraviolet light for 1 s. Weigh silicone rubber, mercaptosiloxane, and photoinitiator 1173 according to a certain mass ratio, add a certain amount of n-hexane, stir and dissolve to make a solution, and then add a certain amount of hydrophobic micron and nanometer silica (1:1 ), stirred and ultrasonicated for 30 minutes to make a suspension; the mass fractions of silicone rubber, mercaptoorganosilicon, photoinitiator, silicon dioxide and n-hexane in this suspension were: 7%, 1.1%, 0.2%, respectively. 5.5%, 86.2%. The suspension was sprayed on the pre-cured elastic substrate and irradiated with ultraviolet light for 60 s to prepare a superhydrophobic elastic composite film.
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