Lyotropic liquid crystal polarizing film and preparation method thereof
A technology of lyotropic liquid crystal and polarizing film, which is applied in the field of lyotropic liquid crystal solid polarizing film and its preparation, can solve the problems of poor heat and humidity resistance, low heat resistance temperature, and easy failure, and achieve excellent heat and humidity resistance and heat resistance temperature High, simple process effect
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Embodiment 1
[0045] Mix the reduced dark blue BO with a molar ratio of 1:20 and fuming sulfuric acid (concentration of 20% by mass), heat it to 110°C and keep it for 36 hours, then cool to room temperature, pour it on ice, and then add the ice The solution is vacuumed and filtered under reduced pressure, washed with absolute ethanol and deionized water until there is no sulfate ion in the filtrate, and dried to obtain the sulfonated reduction dark blue BO.
[0046] Dissolve 2g of sulfonated reduction dark blue BO in 500ml of distilled water, use an acid-resistant filter funnel with a filter hole of 3 to 5 microns to vacuum and reduce pressure, then heat and evaporate the solution to a 12.5% solution, and cool to room temperature to obtain an orderly structure Sulfonation reduces the dark blue BO lyotropic liquid crystal phase.
[0047] Before coating, the glass substrate is washed with Piranha solution (prepared by mixing concentrated sulfuric acid and 30% hydrogen peroxide in a volume ratio...
Embodiment 2
[0051] Mix 0.2 mol of reduced blue RSN with 2 mol of oleum (concentration of 20% by mass) and 1 mol of chlorosulfonic acid, heat to 95°C, keep the temperature for more than 72 hours, cool to room temperature, pour it on ice and separate out. The ice-out solution was vacuum filtered under reduced pressure to obtain a blue filter cake.
[0052] Disperse the blue filter cake, add 250ml concentrated hydrochloric acid (concentration 36-38% mass percentage), ultrasonically shake for 1.5 hours, then heat to 100°C, keep it for 2 hours, cool, and filter with an acid-resistant filter with a filter hole of 5-7 microns The funnel is vacuumed and filtered under reduced pressure, washed with concentrated hydrochloric acid until the filtrate is free of sulfate ions, and dried to obtain sulfonated reduced blue RSN powder.
[0053] 0.5g of sulfonated reduction blue was added to 100ml of distilled water, magnetically stirred for 2 hours, filtered, heated and evaporated to a 10% (mass percentage) su...
Embodiment 3
[0056] Mix 1 mol of reduced scarlet GG and 12 mol of fuming sulfuric acid (concentration of 20% by mass), heat to 70°C and keep it for 12 hours, cool to room temperature, pour it on ice, and filter the ice solution under vacuum. Wash with concentrated hydrochloric acid until the filtrate is free of sulfate ions, and dry to obtain sulfonated reduced scarlet powder.
[0057] Add 1 gram of sulfonated reduction scarlet GG and 2 grams of sulfonated reduction blue RSN prepared in Example 2 into 450 ml of distilled water, magnetically stirred for 1 hour, filtered, and then heated and evaporated to a solution of 12.5% (mass percentage). Cool to room temperature.
[0058] Under the conditions of a temperature of 25~32℃ and a relative humidity of 50~70%, the above-mentioned mixed solution with a concentration of 12.5% is applied with a wire rod coater with a winding diameter of 10 microns and a round rod of Φ15mm×150mm. Apply the solution to a glass substrate cleaned with Piranha soluti...
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Abstract
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