Thin graphite skin on glass-like carbon fiber prepared at high temperature from cellulose fiber

The texture and structure of the glass-like carbon fibers prepared by simple heat treatment at 3200 °C from cellulose fibers were examined by focusing on those of their surfaces. The first order Raman spectra were measured for some of single filaments of the carbon fibers at room temperature in air using a 514.5 nm line of an argon ion laser. Negative magnetoresistance was observed at 77 K for the 3200°C-treated carbon fiber. It was concluded that a glass-like carbon fiber with graphite skin could be prepared from commercially available cellulose-based fiber by a simple heat treatment at 3200°Cc.