A polymer dispersed bistable smectic a-phase liquid crystal film and preparation method thereof
A liquid crystal film, bistable technology, used in liquid crystal materials, chemical instruments and methods, instruments, etc.
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Embodiment 1
[0035] Prepare samples according to the sample proportions in Table 1, heat them in an oven at 80°C until clear, take them out and mix them evenly, drop them between two indium tin oxide-coated films, and roll them to form a 40 μm film. The intensity of ultraviolet light (365nm) is 3.0mW / cm 2 Irradiate under light intensity for 10 minutes at a temperature of 30°C. The obtained samples were tested for electro-optic properties. The test method was to test the light transmittance of the samples at a wavelength of 632 nm by using an ultraviolet-visible-near-infrared spectrophotometer, and the reference was an empty liquid crystal cell. The method of testing the transmittance in the transmission state is to apply a voltage of 5KHz, 20V to 160V in sequence with a step size of 20V. After each test, a voltage of 0.01Hz and 160V needs to be applied to restore it to the scattering state; the method of testing the transmittance in the scattering state For, 0.01Hz, 20V to 160V voltage is...
Embodiment 2
[0039]Prepare samples according to the sample proportions in Table 2, heat them in an oven at 80°C until clear, take them out and mix them evenly, drop them between two films coated with indium tin oxide, and roll them to form a film of 20 μm. The intensity of ultraviolet light (365nm) is 20mW / cm 2 Irradiate under light intensity for 1 minute, and the temperature is 100°C. The obtained samples were tested for electro-optic properties. The test method was to test the light transmittance of the samples at a wavelength of 632 nm by using an ultraviolet-visible-near-infrared spectrophotometer, and the reference was an empty liquid crystal cell. The method of testing the transmittance in the transmission state is to apply a voltage of 5KHz, 20V to 160V in sequence with a step size of 20V. After each test, a voltage of 0.01Hz and 160V needs to be applied to restore it to the scattering state; the method of testing the transmittance in the scattering state For, 0.01Hz, 20V to 160V v...
Embodiment 3
[0044] Prepare samples according to the sample proportions in Table 3, heat them in an oven at 80°C until they are clear, take them out and mix them evenly, drop them between two films coated with indium tin oxide, and roll them to form a film of 0.5 μm. The intensity of ultraviolet light (365nm) is 1mW / cm 2 Irradiate for 30 minutes under light intensity, and the temperature is 0°C. The obtained samples were tested for electro-optic properties. The test method was to test the light transmittance of the samples at a wavelength of 632 nm by using an ultraviolet-visible-near-infrared spectrophotometer, and the reference was an empty liquid crystal cell. The method of testing the transmittance in the transmission state is to apply a voltage of 5KHz, 20V to 160V in sequence with a step size of 20V. After each test, a voltage of 0.01Hz and 160V needs to be applied to restore it to the scattering state; the method of testing the transmittance in the scattering state In order to appl...
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