In this study, the surfaces of zinc oxide nanoparticles (ZnONPs) were modified by bovine serum albumin (BSA) as a biosafe molecule. The prepared modified ZnO (ZnO-BSA) NPswere investigated by different methods such as FT-IR, XRD, FE-SEM, TEM, EDX, and TGA techniques. The FT-IR, EDX, and TGA analysis confirmed the grafting of BSA on the surface of ZnO NPs. Also, the Morphology observations (TEM analysis) showed the reduction of average particle size of ZnONPsafter surface modification. In the first project, series of poly(vinyl chloride) (PVC) nanocomposites (NCs) containing 3, 6 and 9 wt% of ZnO-BSA NPs were prepared. The resulting NCs were characterized by different method such as FT-IR, XRD, TGA, UV-Vis, mechanical testing, FE-SEM, TEM, EDX, and contact angle measurement. According to the histogram diagrams from TEM images, the average size ofNPs was reduced in the polymer matrix. In the second project, poly(vinyl alcohol) (PVA) and 3, 6 and 9 wt% of ZnO-BSANPs were used to prepare the NCs. All of the processes were performed under ultrasonic irradiation as a rapid and green method. The FT-IR, XRD, TGA, UV-Vis, mechanical testing, FE-SEM, TEM, and EDX were used to investigate the characteristics of the prepared NCs. The termal stability and UV absorption of the NCs were enhanced in compared with the pure polymer after addition of modifiedNPs to the PVA matrix.
