Effect of UV Irradiation on The Structure and Optical Properties of PVA/Cucl2

Abstract

The morphology and optical properties of doped PVA with Copper Chloride, CuCl2 have been investigated. The morphology of doped samples has been examined using both atomic force microscope (AFM) and scanning electron microscope (SEM) to investigate the effect of CuCl2 on the structure of PVA. X-ray diffraction showed that the crystallinity of PVA is increased with increasing CuCl2 ratio. In addition, FTIR spectra showed that, some absorbance bands such as bands of OH groups have been affected due to CuCl2 ratio and UV irradiation. On the other hand, the effect of CuCl2 ratio and UV irradiation on UV spectra of all samples has been carried out in the range from 200 to 800 nm. It is observed that, PVA is characterized by two absorbance bands at 278 and 313 nm. The values of absorbance edge, Urbach energy and the direct energy gap of all samples have been calculated.

Enhancement of the Structure, Thermal, Linear/Nonlinear Optical Properties, and Antibacterial Activity of Poly (vinyl alcohol)/Chitosan/ZnO Nanocomposites for Eco-Friendly Applications

“…The intense and broad transmission band centered at 3304 cm −1 was assigned to the stretching vibration of the -OH and -NH2 groups and to O-H/N-H interacting with the oxygen of the C=O group [22]. The bands at 2928 and 2863 cm −1 were attributed to the asymmetric stretching vibration of CH3 and CH2 of chitosan [29]. The bands at 1656 cm −1 were ascribed to C=O stretching (Amide I), 1563 cm −1 to N-H bending (Amide II), and 1394 cm −1 to -COO-stretching vibration.…”