Preparation method of polymer dispersion liquid crystal film
A technology for dispersing liquid crystals and polymers, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of undisclosed components of liquid crystals, and achieve the effects of low toxicity, low viscosity, and low driving voltage
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Embodiment 1
[0025] A method for preparing a polymer-dispersed liquid crystal film, comprising:
[0026] (1) First, prepare a liquid crystal mixture, which is composed of liquid crystal molecules containing 20% to 25% of alkyl biphenyl cyanide structure, liquid crystal molecules containing 45% to 60% of alkoxy biphenyl cyanide structure, and 3% of liquid crystal molecules. ~5% of liquid crystal molecules of alkoxy terphenyl cyanide structure, containing 5% to 20% of liquid crystal molecules with ester group as the central bridge and one end of 3,4 dicyanobenzene structure and containing 5% to 20% of liquid crystal molecules It is formed by mixing one or more liquid crystal molecules with an ester group as the central bridge and one end of which is a biphenyl cyanide structure;
[0027] (2) Mix the liquid crystal mixture with a content of 60% to 90% of the total system mass, a polymerized monomer with a content of 10% to 40% of the total system mass, and a photoinitiator with a content of...
Embodiment 2
[0043] The difference between this example and Example 1 is that the structure and content of the liquid crystal used in this example are shown in Table 3. First, mix the liquid crystal molecules evenly, then mix the liquid crystal mixture, polymerized monomers and photoinitiators according to the proportions in Table 4, and pour them into a liquid crystal cell made of a glass substrate plated with indium tin oxide using the siphon principle. The sample is placed at a wavelength of 365nm and an intensity of 10mW / cm 2 The polymerization temperature was 298K, and the polymerization time was 5min.
[0044] Table 3 Structural formula and relative content of liquid crystal used in Example 2
[0045]
[0046]
[0047] The ratio of each material used in table 4 embodiment 2
[0048]
[0049] Use the liquid crystal comprehensive parameter tester to test the electro-optical properties of the film, and the test results are as follows Figure 5 As shown, the threshold voltage...
Embodiment 3
[0052] Different from the previous embodiment, the structure and content of the liquid crystal used in this embodiment are shown in Table 5. First, mix the liquid crystal molecules evenly, then mix the liquid crystal mixture, polymerized monomers and photoinitiators according to the proportions in Table 6, and pour them into a liquid crystal cell made of a glass substrate plated with indium tin oxide using the siphon principle. The sample is placed at a wavelength of 365nm and an intensity of 10mW / cm 2The polymerization temperature was 298K, and the polymerization time was 5min.
[0053] Structural formula and relative content of liquid crystal used in Table 5 Example 3
[0054]
[0055]
[0056] The ratio of each material used in table 6 embodiment 3
[0057]
[0058] Use the liquid crystal comprehensive parameter tester to test the electro-optical properties of the film, and the test results are as follows Image 6 As shown, the threshold voltage and saturation v...
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Abstract
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