公开(公告)号：US20220064387A1

公开(公告)日：2022-03-03

申请号：US17082207

申请日：2020-10-28

Applicant: Hyundai Motor Company ,  Kia Motors Corporation ,  Korea Research Institute Of Chemical Technology

Inventor： Chae Hwan Hong ,  Jin Woo Choung ,  Dong Yeop Oh ,  Seul A Park ,  Hyeon Yeol Jeon ,  Jeyoung Park ,  Sung Yeon Hwang

IPC: C08J5/18

Abstract: Disclosed is a composite film including a nanocellulose film including cellulose nanofibers stacked in a structure including a plurality of pores; and a polycarbonate resin filling the pores in the nanocellulose film and including a repeating unit that comprises a moiety derived from isosorbide.

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.