环己烷浮游催化法在碳纤维表面生长碳纳米管

以环己烷为碳源、二茂铁为催化剂前躯,采用浮游催化法成功的在碳纤维表面生长了碳纳米管(CNT),制备了多尺度杂化材料CNTs/CF。实验重点考察了反应温度、二茂铁浓度、载气等参数对CNT在纤维表面生长的影响,通过扫描电镜(SEM)、投射电镜(TEM)研究了CNTs/CF的形貌及产物CNT的微观结构。当固定反应温度为820℃、二茂铁-环己烷浓度为2g/100mL时,随着氢气在载气中含量在0～100%范围内变化,产物CNT直径亦有86nm降低至39nm。通过单丝拉伸测试发现,相比初始碳纤维,不同长度的CNTs/CF单纤维强度下降幅度均在10%以内。

Growth of carbon nanotubes onto the carbon fibers from cyclohexane via floating catalyst method

Multiscale hybrid material CNTs/CF,carbon nanotubes(CNTs)grown onto the carbon fibers,was successfully prepared using cyclohexane as carbon source,ferrocene as catalyst precursor via floating catalyst method.Through observing the morphology of CNTs/CF and microstructure of as-synthesized CNTs using scanning electron microscope(SEM)and transmission electron microscope(TEM),emphasis was made to check the influence of growth temperature,concentration of ferrocene and carrier gas etc on carbon nanotubes grown onto the carbon fibers.When the reaction temperature and concentration of ferrocene were fixed at 820℃ and 2g/100ml,respectively,the diameters of as-synthesized CNTs decreased from 86nm to 39nm with 0~100% content of hydrogen in the carrier gas.Compared with the as-received carbon fibers,single fiber tensile tests showed that the tensile strength degraded within 10% for different lengths of single CNTs/CF.