▎ 摘　　要

NOVELTY - Alignment agent for improving residual image performance of liquid crystal display comprises a polyimide precursor solution and dispersion liquid containing inorganic carbon nanomaterials. The resin component of the polyimide precursor solution is diamine containing an aromatic structure and a tetracarboxylic acid component with alicyclic or aromatic structure. The dispersion is an inorganic carbon nano material dispersion with mass fraction of 0.001-10 wt.%. USE - Used as alignment agent for improving residual image performance of liquid crystal display. ADVANTAGE - The alignment agent: reduces the volume resistivity of the orientation agent after film formation; and improves after-image display performance of the liquid crystal. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing alignment agent that improves the residual image performance of liquid crystal display, comprising (i) adding 100 mg single-walled carbon nanotubes to 1l flask, then adding 500 ml nitric acid aqueous solution (10%), dispersing by ultrasonic for 5 minutes, and cleaning for three times with deionized water by high-speed centrifugation, reacting for 4 hours to obtain precipitate, dispersing the precipitate ultrasonically in 500 g of NMP to obtain carboxyl modified single-walled carbon nanotube dispersion, (ii) adding 600 g NMP, 10.8 g p-phenylenediamine (0.1 mol), 49.6 g 4,4-diaminodiphenylmethane (0.254 mol), dissolving by stirring while delivering nitrogen gas, while stirring the diamine solution under water cooling, adding 66.7 g cyclobutane tetracarboxylic dianhydride (0.34 mol), and further adding 200 g NMP, stirring for 3 hours under a nitrogen atmosphere to obtain polyamic acid solution with a viscosity of 760 mPas, adding 500g NMP and 150-180g GBL of the polyamic acid solution, and stirring to obtain a polyimide precursor solution, and(iii) slowly adding 100 g dispersion containing inorganic carbon nanomaterials into the polyimide precursor solution under stirring, and uniformly mixing to obtain polyamic acid alignment agent doped with carbon nanotubes.