A kind of liquid crystal polymer film vibrator and preparation method thereof
A technology of liquid crystal polymer and thin film vibration, applied in instruments, optics, nonlinear optics, etc., can solve problems such as single deformation of materials, and achieve the effects of small damage, cheap raw materials, and simple preparation
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[0030] 1. The invention provides a kind of preparation method of liquid crystal polymer film vibrator, comprises the following steps:
[0031] (1) Continuously add ammonia water to the dopamine aqueous solution, and finally ensure that the pH value of the reaction system is 7.5-8, stir and react for 40-80 hours, centrifuge the reaction solution, and dry the centrifuged solid to obtain polydopamine Nanoparticles; wherein, the concentration of the added dopamine aqueous solution is 0.5-1 mg / mL; adding ammonia water to the dopamine aqueous solution is mainly to adjust the pH value of the reaction system.
[0032] (2) adding the polydopamine nanoparticles into the reaction solution, the addition of the polydopamine nanoparticles is 2 to 5wt%, that is, the addition of the polydopamine nanoparticles is the total amount of the reaction solution doped with the polydopamine nanoparticles. 2~5wt% of the amount; Then, the reaction solution is poured into a liquid crystal cell with parall...
Embodiment 1
[0040] The preparation of embodiment 1 polydopamine nanoparticles
[0041] 1. Pour 15mL of ammonia water into 300mL of deionized water, stir well and set aside; dissolve 0.8mg of dopamine in 100mL of deionized water, stir well, slowly drop the above ammonia water into the dopamine aqueous solution, and stir for 40 hours. Continuously add ammonia water to make the final pH value of the reaction system between 7.5 and 8.
[0042] 2. Add the above-mentioned reacted solution into a centrifuge tube and centrifuge for a total of 3 times at a centrifugation rate of 10000r / min; then pour off the supernatant, take the remaining black precipitate in the centrifuge tube and dry it to obtain polydopamine nanoparticles , see its SEM image figure 1 shown.
Embodiment 2
[0043] Embodiment 2 Preparation of Liquid Crystal Polymer Film Vibrator
[0044] 1. Add 1.5 mg of polydopamine nanoparticles prepared in Example 1 to 50 mg of polymerizable liquid crystal monomers, mix well and set aside;
[0045] 2. Pour the polymerizable liquid crystal monomer into a liquid crystal cell with a parallel orientation on one side and a vertical orientation on the other side; after filling half of the liquid crystal cell, pour the polydopamine doped in the above step 1 Polymerizable liquid crystal monomers of nanoparticles until the liquid crystal cell is filled, the thickness of the liquid crystal cell is 20 μm;
[0046] 3. Place the liquid crystal cell in the above step 2 at 75°C at 1mW / cm 2 Polymerize under ultraviolet light for 5h, the wavelength of ultraviolet light is 365nm, obtain liquid crystal polymer film;
[0047] 4. Cut the obtained liquid crystal polymer film into a film with a length of 1 cm and a width of 0.5 cm, which is a liquid crystal polymer f...
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