以十六烷基三甲基溴化铵(CTAB)为分散剂,制备了分散性能良好的碳纳米管悬浮液.通过测定等温吸附曲线和悬浮液的Zeta电位,研究了CTAB对碳纳米管表面性质的影响.结果表明,CTAB的加入使Zeta电位由-29mY变为65mV左右;等温吸附曲线表明,CTAB在碳纳米管表面为"两阶段吸附",CTAB浓度为9×10-4mol·L-1时,在碳纳米管表面达到饱和吸附.通过悬浮碳纳米管浓度测定确定了所需最佳CTAB的用量为9×10-4mol·L-1左右,同时对CTAB的吸附分散机理进行了分析和讨论.
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