Patent ID: 8945501
Filing Date: 2015-02-03
Classification: B82Y,C01B,D01F,H01B

Abstract:
1. A method for preparing a carbon nanotube, the method comprising: a) preparing a liquid polyacrylonitrile (LPAN) solution, stirring the LPAN solution at between 100 and 200° C. for between 100 and 200 h to yield a cyclized LPAN solution; b) heating the cyclized LPAN solution at between 200 and 300° C. for between 1 and 10 h to yield a thermally-oxidized polyacrylonitrile (OPAN) comprising a ladder structure; c) grinding, screening, and drying at room temperature the OPAN to yield a thermal oxidative precursor; d) calcining the thermal oxidative precursor at between 400 and 1000° C. for between 1 and 24 h in the presence of inert gas having a flow rate of between 10 and 500 mL/min to yield a carbonated precursor; and e) calcining the carbonated precursor at between 1000 and 1500° C. for between 1 and 10 h in the presence of the inert gas having a flow rate of between 10 and 500 mL/min to yield a carbon nanotube material.