Chitosan (CS) is a natural biopolymer that due to its excellent properties such as biocompatibility and biodegradability is suitable for use in many applications. But, dependent on the molecular weight and other properties the electrospinning capability of CS is very weak. To solve this problem, it is recommended to blend it with a second polymer. In this work, CS/polyamide-6 (PA6) composite nanofibers were fabricated by electrospinning technique. Then different weight percentages of graphene oxide (GO) i.e. 0.1, 0.25, and 0.5 wt% were used to improve the mechanical and thermal properties of composite nanofibers. The characterization results showed that uniform nanofibers were formed by electrospinning of the PA6/CS nanocomposites blend, and the addition of GO lead to the formation of spider-web-like morphology with decreasing of nanofibers diameter. Further, the GO can improve Young's modulus and thermal degradation resistance of the PA6/CS nanofibers mat. Finally, the potential of prepared composite nanofibers was investigated for the adsorption of lead ions (Pb²⁺) in a batch system. Kinetic studies revealed that the Pb²⁺ ion adsorption onto PA6/CS/GO nanofibers mat followed pseudo-first-order kinetic, and gave the maximum adsorption capacity of 217.39 mg g⁻¹.

壳聚糖 (CS) 是一种天然生物聚合物，由于其生物相容性和生物降解性等优异特性，适用于许多应用。但是，取决于分子量和其他特性，CS 的静电纺丝能力非常弱。为了解决这个问题，建议将其与第二种聚合物混合。在这项工作中，CS/聚酰胺-6（PA6）复合纳米纤维通过静电纺丝技术制备。然后使用不同重量百分比的氧化石墨烯 (GO)，即 0.1、0.25 和 0.5 wt% 来改善复合纳米纤维的机械和热性能。表征结果表明，通过静电纺丝 PA6/CS 纳米复合材料共混物形成均匀的纳米纤维，并且随着纳米纤维直径的减小，GO的加入导致蜘蛛网状形态的形成。此外，GO 可以提高 PA6/CS 纳米纤维垫的杨氏模量和耐热降解性。最后，研究了制备的复合纳米纤维吸附铅离子（Pb²⁺ ) 在批处理系统中。动力学研究表明，PA6/CS/GO纳米纤维对Pb ²⁺离子的吸附遵循准一级动力学，最大吸附量为217.39 mg g ^-1。