فهرست نشریات علمی دسترسی آزاد ایران

WO3 nanoparticles and polyurethane/polyvinyl chloride (PU/PVC) polymers were used to fabricate PU/PVC/WO3 nanofibers mats with different percentages of WO3 filler loading (0 − 35 wt. %) using an electrospinning method.  Surface morphology and average diameter of composite nanofibers were determined by scanning electron microscope imaging. Fourier transforms Infrared spectra of the nanofibers were investigated, revealing displacement in the position of the bands and changes in their intensity depending on the filler loading. Also, a strength testing device is employed to study the mechanical properties of the nanofibers, indicating their high modulus of elasticity. The fabricated Pb-free electrospun nanofibers were exposed to an X-ray tube with voltages in the range from 20.3 up to 35 kV, and the effects of voltage, filler loading, and polymer type on the attenuation coefficient and half-value layer (HVL) are investigated. The HVLs of 35 and 30 wt. % WO3 nanoparticle-filled PVC and PU/PVC nanofibers were 0.0156 and 0.0135 cm, being approximately 2.22- and 1.92-fold compared to those of Pb as evaluated by XCOM calculations at the low voltages. Therefore, the manufactured samples have a small half-value layer and at the same time, significantly low density as well as flexibility which can pave the way for their use in personal shielding in clinical and non-clinical applications. Due to the flexibility and low thickness of fabricated nanofibers, they can easily cover the irradiated organs and be good candidates for use as a light, lead-free, and efficient shield for X-rays in diagnostic imaging.