Electrospun fibres were obtained by applying 15 kV voltage, 1 ml/h flow rate, 20 cm of distance between the needle and collector and using 23 G rounded needle. The SEM images in Figure display the nanocomposite fibers containing 1%, 5%, and 10% CNC and Figure Represents the average fiber diameter. The incorporation of CNC into the electrospinning solution resulted in an observable increase in the average fiber diameter. At 1% CNC concentration, nanofibers with an average diameter of around 650-750 nm were achieved for both the copolymers and PEG-modified copolymers. However, as the CNC content was increased to 5% and 10%, the average fiber diameter significantly increased to 1300 nm and 2200 nm, respectively. Beside increasing the fiber diameter, the higher CNC content might lead to a more complex and dense dispersion, hindering the electrospinning process and resulting in thicker fibers.