Usage of CNTs as matrix modifiers during fabrication of CNFs from the electrospun polymer precursor is an interesting approach to obtain composite materials with a new set of properties. However, the progress in this field is hindered by the lack of consistency of the CNTs used in the studies and sometimes insufficient materials characterization.

In this study, two types of CNTs were at first characterized to reveal their chemical composition and morphology (by TEM and XPS) and then used as matrix additives in the process of electrospinning. The outcome product was evaluated for morphology (SEM), chemical composition (XPS, FTIR), course of thermal transition (STA-FTIR) and level of structural arrangement (TEM combined with SAED) to answer the question how do CNTs interact with polymer matrix and how it impacts the process of thermal transition and properties of the as-received carbon nanofibers. Highly oxidized and short CNTs were found to increase the structural arrangement, catalyzing the thermal transition, while thin and long CNTs, with low amount of oxygen, entrap the nitrogen atoms, yielding nitrogen-doped CNFs that might be suggested as high-performance oxygen reduction reaction catalysts.

在由电纺聚合物前体制造CNF的过程中，将CNT用作基质改性剂是获得具有一组新特性的复合材料的一种有趣方法。然而，该领域的进展因研究中所用CNT的缺乏一致性以及有时材料表征不足而受到阻碍。

在这项研究中，首先对两种类型的CNT进行了表征，以揭示它们的化学组成和形态（通过TEM和XPS），然后在电纺丝过程中用作基质添加剂。对最终产品的形态（SEM），化学成分（XPS，FTIR），热转变过程（STA-FTIR）和结构排列水平（TEM与SAED结合）进行了评估，以回答CNT如何与聚合物基质相互作用的问题以及它如何影响热转变过程以及所接受的碳纳米纤维的性能。发现高度氧化的短碳纳米管会增加结构排列，从而催化热转变，而细而长的碳纳米管却含有少量的氧气，会俘获氮原子，