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.

公开(公告)号：US11555253B2

公开(公告)日：2023-01-17

申请号：US17405018

申请日：2021-08-17

Applicant: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： Hun-su Lee ,  Jaewoo Kim ,  Un-Seok Jung ,  Yoonsang Kim ,  Yongchae Jung ,  Jaesang Yu ,  Yongseok Choi

IPC: C25D11/00 ,  C25D21/12 ,  C25D21/04 ,  C25D21/02 ,  C25D11/02 ,  C25D17/00

Abstract: In a plasma electrolytic oxidation apparatus and a method of plasma electrolytic oxidation using the plasma electrolytic oxidation apparatus, the plasma electrolytic oxidation apparatus includes a chamber and an electrode unit. The chamber is configured to receive an electrolyte. The electrode unit is configured to receive the electrolyte from the chamber and to treat an object with a plasma electrolytic oxidation treatment. The electrode unit includes an electrode, an enclosing part and a cover. The electrode is configured to receive a voltage from outside, and to form a receiving space in which the electrolyte is received between the electrode and the object. The enclosing part is configured to enclose a gap between the electrode and the object. The cover is configured to cover the electrode.