A kind of cholesteric liquid crystal composite film and its preparation method and application
A cholesteric liquid crystal and composite film technology, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of inability to adjust the reflected wavelength, poor flexibility, etc., and achieve simple thickness, strong stability, and strong tensile strength. The effect of tensile strength
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Embodiment 1
[0024] see figure 1 , figure 1 It is a schematic diagram of the preparation process of an embodiment of the cholesteric liquid crystal composite film of the present invention; wherein, process A is a schematic diagram of the preparation process of the cholesteric liquid crystal layer in this embodiment; process B is a schematic diagram of the preparation process of the elastomer layer in this embodiment .
[0025] Such as figure 1 As shown in, the cholesteric liquid crystal layer was prepared according to the procedure A therein. Specifically, the following raw materials are taken: 79.73t% achiral liquid crystal diacrylate monomer, 10.50wt% chiral liquid crystal diacrylate monomer, 8.78wt% chain extender butylamine and 0.99wt% photoinitiator Irgacure184. Mix the above raw materials uniformly to form a mixture, then heat and stir the mixture at 100°C to make it polymerize to form oligomers; apply the polymerized material on a dry and clean glass substrate by scraping, with a...
Embodiment 2
[0039] The preparation method of the cholesteric liquid crystal composite film in this example is basically the same as the preparation method in Example 1. The difference between the two is that in this example, when preparing the cholesteric liquid crystal layer, multiple steps are carried out at different temperatures. The patterning of the cholesteric liquid crystal layer is achieved by means of cross-linking. For details, please refer to image 3 , image 3 It is a schematic diagram of the preparation process of the patterned cholesteric liquid crystal layer in another embodiment of the cholesteric liquid crystal composite film of the present invention. Such as image 3 As shown, when preparing the cholesteric liquid crystal layer, with the help of the mask plate 1 at the temperature T 1 Under the use of ultraviolet light to irradiate the mixed liquid crystal coating 2, the mask plate 1 includes a light-transmitting portion 11 and an opaque portion 12, and the light-tr...
Embodiment 3
[0044] The preparation method of the cholesteric liquid crystal composite film in this example is basically the same as the preparation method of Example 1, the difference between the two is that the raw materials of the cholesteric liquid crystal layer include: 75wt% achiral liquid crystal diacrylate monomer , 15wt% chiral liquid crystal diacrylate monomer, 8wt% chain extender glycine and 2wt% photoinitiator Irgacure-819, other preparation processes are the same as in Example 1.
[0045] The structural formula of the achiral liquid crystal diacrylate monomer used in this embodiment is as follows:
[0046]
[0047] The structural formula of the chiral liquid crystal diacrylate monomer is as follows:
[0048]
[0049] The structural formula of the chain extender glycine is as follows:
[0050] The structural formula of photoinitiator Irgacure-819 is as follows:
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Abstract
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