Preparation method for liquid crystal material of electronic paper material
A liquid crystal material and paper technology, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of limited application and insufficient bright colors, and achieve the effect of low cost and simple processing equipment
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Embodiment 1
[0033]Preparation of the liquid crystal cell: Spin-coat one side of the glass substrate with 3% polyvinyl alcohol aqueous solution, bake at 80° C. for 30 minutes, and then use flannelette to rub and align in one direction. Two oriented glass substrates were bonded together with a polyethylene spacer with a thickness of 25 μm along the orientation direction to make a surface-oriented liquid crystal cell.
[0034] (1) Preparation of hydrogen bond type chiral compound HCD. The pyridine chiral compound and the carboxylic acid chiral compound are uniformly mixed in the organic solvent tetrahydrofuran at a molar ratio of 1:1, and then the solvent is slowly evaporated completely at room temperature. Measure the variable temperature infrared spectrum of the hydrogen bond type chiral compound HCD. The result is as figure 2 shown.
[0035] (2) Prepare samples according to Table 1.
[0036] Table 1. Sample composition and ratio
[0037]
[0038] Dissolve the sample in tetrahydro...
Embodiment 2
[0044] Among them, the HCD process for the preparation of hydrogen bond type chiral compounds is as follows: the imidazole chiral compound and the alcohol chiral compound are mixed uniformly in the organic solvent tetrahydrofuran according to the molar ratio of 1:2, and then the solvent is slowly mixed at room temperature. Volatile completely.
[0045] All the other steps are the same as in Example 1, and the test results are similar to those in Example 1.
Embodiment 3
[0047] Among them, the HCD process for preparing hydrogen-bonding chiral compounds is as follows: the imidazole chiral compound and the phenol chiral compound are mixed uniformly in the organic solvent tetrahydrofuran according to the molar ratio of 3:1, and then the solvent is slowly mixed at room temperature. Volatile completely.
[0048] All the other steps are the same as in Example 1, and the test results are similar to those in Example 1.
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