公开(公告)号：US20230272559A1

公开(公告)日：2023-08-31

申请号：US18003554

申请日：2021-06-23

Applicant: RISE RESEARCH INSTITUTES OF SWEDEN AB

Inventor： Andreas BENGTSSON ,  Maria SEDIN ,  Elisabet BRÄNNVALL ,  Alice LANDMÉR ,  Fernando ALVARADO

IPC: D01F9/17 ,  D01F2/00 ,  D01D5/06 ,  C08L1/02 ,  C08K3/22

CPC classification number: D01F9/17 ,  D01F2/00 ,  D01D5/06 ,  C08L1/02 ,  C08K3/22 ,  D10B2201/22 ,  D10B2401/063 ,  C08K2003/2296 ,  C08L2203/12

Abstract: The present disclosure relates to a method for the production of precursor fiber for the production of carbon fiber, comprising the steps: a) a) forming a spinning dope comprising a dissolving pulp, a lignin and an alkali metal hydroxide dissolved in water (s201); 5 b) extruding the spinning dope through a spinning nozzle to provide a fibrous extrudate (s203); and c) passing the fibrous extrudate through a coagulation liquid to provide the precursor fiber (s205); wherein the coagulation liquid is arranged to effect precipitation of the precursor fiber by regulation of pH and/or ionicity. The disclosure further relates to precursor fibers and carbon fibers produced by the method above, as well as spinning dopes used in the method.