Manufacturing method of polymer dispersed liquid crystal
A technology of polymer dispersion type and manufacturing method, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of high scattering state penetration, insufficient distribution density, insufficient contrast, etc.
Active Publication Date: 2016-02-03
苏州盛泽科技创业园发展有限公司
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Problems solved by technology
[0003] However, the distribution density of the liquid crystal cell droplets in the existing polymer dispersed liquid crystal is insufficient, resulting in high penetration of the scattering state, which in turn leads to insufficient contrast
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experiment example 1
[0048] The same composition as in Comparative Example 2 was provided. After sequentially mixing, irradiating ultraviolet light with a wavelength of about 365nm and irradiating ultraviolet light with a wavelength of about 313nm, a polymer dispersed liquid crystal is formed. Then, this polymer dispersed liquid crystal is tested, and obtained as follows figure 2 The photoelectric characteristic curve 206 is shown. The transmittance of the scattering state of the polymer dispersed liquid crystal is about 3%, and the transmittance of the transparent state is about 80%.
[0049] From the results of Comparative Examples 1 and 2 and Experimental Example 1, it can be understood that the irradiation of ultraviolet light with a wavelength of 313nm can cause liquid crystals to precipitate more liquid crystal cell droplets, so that the transmittance of the scattering state can be reduced from 16-17% to 3%. Thus, it can be proved that the scattering state of the polymer-dispersed liquid...
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Abstract
A method for manufacturing polymer-dispersed liquid crystals, comprising: mixing liquid crystals, a first photopolymerizable material, a first photoinitiator, a second photopolymerizable material, and a second photoinitiator to form a mixture, the first photopolymerizable The initiator is used to start the polymerization of the first photopolymerizable material under the first ultraviolet light irradiation, and the second photoinitiator is used to start the polymerization of the second photopolymerizable material under the second ultraviolet light irradiation. The wavelength of an ultraviolet light is different from the wavelength of the second ultraviolet light; polymerizing the first photopolymerizable material by irradiating the first ultraviolet light to form a plurality of first liquid crystal cell droplets; and polymerizing the second photopolymerizable material by The second ultraviolet light is irradiated to form a plurality of second liquid crystal cell droplets dispersed among the first liquid crystal cell droplets.
Description
technical field [0001] The invention relates to a method for manufacturing polymer dispersed liquid crystals. Background technique [0002] Polymer Dispersed Liquid Crystal (PDLC) is to uniformly mix liquid crystals with polymerizable monomers or oligomers, and trigger a polymerization reaction under certain conditions to produce micron-sized liquid crystal cell droplets that are evenly dispersed in the polymer. Due to the optoelectronic properties of liquid crystals, the polymer dispersed liquid crystals can be modulated by applying voltage to the transparent state and the scattering state. The properties of this material have been widely used in fields such as transparent displays and flexible displays. [0003] However, the distribution density of the liquid crystal cell droplets of the existing polymer dispersed liquid crystal is insufficient, which leads to a relatively high penetration of the scattering state, which in turn leads to insufficient contrast. Therefore, ...
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IPC IPC(8): C09K19/52
Inventor 陈建华苏峻纬
Owner 苏州盛泽科技创业园发展有限公司