3 Method for manufacturing high absorbency three-dimensional polyacrylonitrile-based carbon fiber

摘要

The present invention relates to a method for producing super absorbent three-dimensional polyacrylonitrile-based carbon fiber. More specifically, the method comprises: a solution production step of producing a polyacrylonitrile solution by dissolving a polyacrylonitrile powder in dimethylformamide (C_3H_7NO, DMF); a 2D fiber production step of producing a 2D fiber mat by electrospinning the polyacrylonitrile solution; a 3D nanofiber production step of producing a 3D nanofiber by immersing the 2D fiber mat in an immersion solution; a stabilization step of stabilizing the 3D nanofiber by putting the same in a tube at the temperature of 180°C to 300°C for 2 to 3 hours; and an annealing step of heating the stabilized 3D nanofiber and slowly cooling the stabilized 3D nanofiber at room temperature to form a 3D carbonized fiber. The 3D carbonized fiber of the present invention has high stability and crystallinity, and thus exhibits high quality and mechanical strength.