公开(公告)号：US11939338B2

公开(公告)日：2024-03-26

申请号：US17228109

申请日：2021-04-12

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Jaewoo Kim ,  Jun Young Jo ,  Yong Chae Jung ,  Yong Seok Choi ,  Han Gyeol Jang ,  Sungmin Jung ,  Dong Woo Kim

IPC: C09K9/02 ,  C07D491/107 ,  C08L83/04

CPC classification number: C07D491/107 ,  C08L83/04 ,  C09K9/02 ,  C09K2211/1033

Abstract: The present disclosure relates to a spiropyran composite having improved mechano-sensitivity, a method for manufacturing the same, and a chromic article including the same. Particularly, the spiropyran composite is obtained by bonding spiropyran covalently to a polymer, an inorganic material or a mixture thereof to form spiropyran composite, and impregnating the spiropyran composite with a sensitivity-enhancing agent for a suitable time through a wet infiltration process to form non-polar environment at the inner part of the spiropyran composite, to cause pre-stretch and to increase a change in color or fluorescence in response to force, stress or strain, thereby providing significantly improved mechano-sensitivity. In addition, a wet filtration process is used and no expensive equipment is required to simplify the process. Further, the process can be performed rapidly within several minutes to reduce the processing time.