纺丝工艺及预氧化条件对离心纺聚丙烯腈基纳米碳纤维的影响

采用离心纺丝及预氧化碳化技术制备纳米聚丙烯腈基碳纤维，通过正交实验，对离心纺丝制备纳米聚丙烯腈纤维的4个工艺参数（溶液浓度、转速、针头直径和接收距离）进行优化组合，探究最佳的组合工艺；并对聚丙烯腈纤维预氧化工艺中的温度和时间进行组合优化。结果表明：在离心纺丝工艺中，浓度是对纤维直径影响最大的工艺参数，而转速则是对纤维均匀度影响最大的参数；预氧化处理的温度应在250℃以上，以280℃为宜，且适宜的预氧化时间为2h。

Influence of spinning process and pre-oxidation conditions on PAN-based carbon nanofibers fabricated by centrifugal spinning

In this paper, the polyacrylonitrile-based carbon nanofibers were successfully prepared by centrifugal spinning and pre-oxidation carbonization. And the influence of spinning process parameters such as concentration, rotational speed, spinneret diameter and receiving distance was explored to obtain the optimum combination of parameters. In addition, the temperature and time of pre-oxidation treatment was optimized during the carbonization process. The results showed that the solution concentration has the most significant influence on the diameter of the fibers, and the rotational speed has the most significant influence on the uniformity of the fibers in the centrifugal spinning process. In addition, the treatment temperature of pre-oxidation should be kept above 250 ℃, preferable 280 ℃ and the optimum treatment time is 2 h.