Patent ID: 11873412
Assignee: HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN)
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for preparing an aqueous fluorescent ink, comprising the following steps:
step (1): mixing polystyrene micro-spheres with an organic solvent and a fluorescent dye to obtain a fluorescent solution;
step (2): mixing the fluorescent solution obtained in step (1) with a surfactant and water to obtain a homogeneous system; and
step (3): removing the organic solvent from the homogeneous system obtained in step (2) to obtain the aqueous fluorescent ink,
wherein the aqueous fluorescent ink comprises the following components by mass content: 0.10%-0.14% of the polystyrene micro-spheres, 0.010%-0.014% of the fluorescent dye, 0.4%-0.6% of the surfactant, the balance being water,
wherein the fluorescent dye comprises 99%-80% of poly(9,9-dioctylfluorene) and 1%-20% of poly(9,9-dioctylfluorene-co-benzothiadiazole);
wherein the poly(9,9-dioctylfluorene) has a weight average molecular weight of 19,000-20,000 Daltons, and a polydispersity of 1.300000-1.400000; and
the poly(9,9-dioctylfluorene-co-benzothiadiazole) has a weight average molecular weight of 48,000-49,000 Daltons, and a polydispersity of 2.000000-2.100000.