【摘要】 用扫描隧道显微镜对经过电化学腐蚀前后的聚丙烯腈基碳纤维分别进行了观测分析，发现了一种有趣的螺旋结构。碳纤维表面是由沿纤维轴向排列的呈螺旋结构的细纤维组成的，螺旋伸展方向沿纤维轴向。同时这种螺旋结构也存在于碳纤维内部。最后对螺旋结构的形成进行了讨论。更多还原

【Abstract】 Scanning tunneling microscope (STM) was used to characterize the surface topography of Polyacrylonitrile (PAN) based carbon fibers before and after electrochemical treatment.A new kind of spiral structures was found,which was not only on the surface but also in the inner layer.The cause of this spiral structures of the fibers was discussed.The fiber structure contained the shape of the precursor.更多还原