Electrophoretic composition and method for preparing the same
AssigneesLG Display Co., Ltd., Nano Solution Co., Ltd.
InventorsSuJeong Lee, SungHee Kim, Hyungyul Kim, HoJun Moon
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Abstract
The present disclosure relates to an electrophoretic composition and a method for preparing the same, and more particularly, to an electrophoretic composition which is applicable to a variable transmittance device which uses an electrophoretic method and a method for preparing the same. According to the exemplary embodiments of the present disclosure, an electrophoretic composition which minimizes the settling problem caused by the gravity and allows the electrophoretic particles to maintain the stably dispersed pattern in the solvent and a method for preparing the same may be provided.
Claims11
A method for preparing an electrophoretic composition, the method comprising:
- mixing and circulating porous carbon particles and an acid;
- neutralizing with a base after cooling down;
- preparing the porous carbon particles having COOH group introduced on a surface by washing and drying;
- mixing and primarily dispersing the porous carbon particles having COOH group introduced on the surface, a dispersant including an NH group, and a solvent;
- forming a porous carbon particle-dispersant complex by heating the primarily dispersed mixture, wherein the NH group of the dispersant reacts with the COOH of the surface of the porous carbon particle and forms an amid bond so that at least a part may form the porous carbon particle-dispersant complex;
- obtaining the porous carbon particle-dispersant complex formed by removing an unreacted material;
- and
- controlling a concentration of the dispersant to allow the complex to form a micelle,
- wherein the base includes ammonia (NH3), lithium acetate (CH3COOLi), sodium acetate, potassium acetate (CH3COOK), sodium hydrogen carbonate (NaHCO3), potassium hydrogen carbonate (KHCO3), sodium carbonate (Na2CO3), potassium carbonate (K2CO3), or a mixture thereof.
Dependencies are inferred from the claim text.