公开(公告)号：US12071693B2

公开(公告)日：2024-08-27

申请号：US17990028

申请日：2022-11-18

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Akiko Yamamoto ,  Keiichiro Oishi ,  Shinji Tanaka

IPC: C23C22/05 ,  A01N37/20 ,  A61L2/235 ,  A61L2/238 ,  C22C9/04 ,  C22C9/10

CPC classification number: C23C22/05 ,  A01N37/20 ,  A61L2/235 ,  A61L2/238 ,  C22C9/04 ,  C22C9/10

Abstract: The present invention provides a surface treatment method that improves antimicrobial activity of copper or a copper alloy and enhances immediate effects of antimicrobial actions on the surface of the copper or the copper alloy. A surface treatment method for copper or a copper alloy according to the present invention comprises preparing a reducing agent solution containing a biological reducing substance, and treating the surface of the copper or the copper alloy with the reducing agent solution. The present invention also provides a surface treatment liquid for sterilizing copper or a copper alloy, in which the surface treatment liquid contains a biological reducing substance. The present invention also provides a sterilization method that comprises bringing copper or a copper alloy treated by the surface treatment method into contact with a surface of an object to sterilize the surface of the object.

公开(公告)号：US11535939B2

公开(公告)日：2022-12-27

申请号：US16627867

申请日：2018-05-30

Applicant: NATIONAL INSTITUTE FOR MATERIALS SCIENCE

Inventor： Akiko Yamamoto ,  Keiichiro Oishi ,  Shinji Tanaka

IPC: C23C22/05 ,  A01N37/20 ,  A61L2/235 ,  A61L2/238 ,  C22C9/04 ,  C22C9/10

Abstract: The present invention provides a surface treatment method that improves antimicrobial activity of copper or a copper alloy and enhances immediate effects of antimicrobial actions on the surface of the copper or the copper alloy. A surface treatment method for copper or a copper alloy according to the present invention comprises preparing a reducing agent solution containing a biological reducing substance, and treating the surface of the copper or the copper alloy with the reducing agent solution. The present invention also provides a surface treatment liquid for sterilizing copper or a copper alloy, in which the surface treatment liquid contains a biological reducing substance. The present invention also provides a sterilization method that comprises bringing copper or a copper alloy treated by the surface treatment method into contact with a surface of an object to sterilize the surface of the object.