سید رضا نبوی

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 nanofbers were fabricated by electrospinning technique. Then diferent 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 nanofbers. The characterization results showed that uniform nanofbers 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 nanofbers diameter. Further, the GO can improve Young's modulus and thermal degradation resistance of the PA6/ CS nanofbers mat. Finally, the potential of prepared composite nanofbers 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 nanofbers mat followed pseudo-frst-order kinetic, and gave the maximum adsorption capacity of 217.39 mg g−1.