公开(公告)号：US12091552B2

公开(公告)日：2024-09-17

申请号：US18366655

申请日：2023-08-07

申请人： NANTONG UNIVERSITY

发明人： Min Li ,  Wujun Ma ,  Jialiang Zhou ,  Wenlin Qu ,  Ting Ding ,  Lifen Mao ,  Shiyu Li

IPC分类号： C09B61/00 ,  C09B33/048 ,  C09B62/01 ,  D06P1/06 ,  G01N33/52

CPC分类号： C09B62/01 ,  C09B33/048 ,  D06P1/06 ,  G01N33/52

摘要： Disclosed are reactive dyes and preparation methods thereof. The reactive dye may be prepared using heterocyclic primary amine as a diazo component, 4,4′-diamino-2,2′-stilbenedisulfonic acid, s-triazine, or ethylenediamine as a bridging group, and a dimonochlortriazine group as an active group. The color-changing compound is covalently bonded into the fiber chemical structure by nucleophilic substitution reaction between monochlorotriazine and the hydroxyl group in a textile structure, and the size of the conjugated system and the range of electron delocalization of the dye are changed by a reversible isomerization reaction of the hydroxyl group adjacent to the diazo group and the diazo group under different pH regulations. Moreover, the dye has a double color changing structure, which improves the capability of the dye combined with —H/—OH. The pH value range that can cause color changes in the dye is effectively expanded to include weak alkali, weak acid or even neutral conditions.