公开(公告)号：US12269922B2

公开(公告)日：2025-04-08

申请号：US17056981

申请日：2019-03-19

Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY

Inventor： Jeyoung Park ,  Dong Yeop Oh ,  Sung Yeon Hwang ,  Hyun Gil Cha ,  Jong Geon Jegal ,  Ho Jun Kim ,  Seul A Park

IPC: C08G69/32 ,  B01D39/16 ,  C08J3/11 ,  D01D1/02 ,  D01F1/10 ,  D01F6/60

Abstract: A method for preparing an aramid nanofiber dispersion includes dissolving an aromatic polyamide-based polymer in a solution including a basic material and an aprotic polar solvent, while performing stirring so that a nanofiber is produced, wherein the aromatic polyamide-based polymer is a polymer in a form of a solid which is not spun into a fiber form, the stirring is performed at a temperature of 50° C. or lower and at a speed of 10-1000 rpm so that a time taken for the aromatic polyamide-based polymer to be dissolved and formed into an aramid nano-fiber dispersion is 80 hours or less, an aramid nanofiber in the aramid nanofiber dispersion has an average diameter of 1 to 100 nm and an average length of 0.1 to 100 μm, and the basic material includes potassium hydroxide or sodium hydroxide.