Abstract
In the presented study, a newly synthesized methacrylate polymer (PFAEMA) and a mixture of sodium carboxylmethyl cellulose, a biopolymer, were prepared by hydrothermal method. Three new PFAEMA-NaCMC/Ag bionanocomposites were produced by adding biosynthesized Ag NPs in Hypericum perforatum extract at different weight ratios (3%, 5%, and 7%) to the PFAEMA-NaCMC blend by hydrothermal method. TGA results showed that Ag NPs increased the thermal stability of the blend. PFAEMA-NaCMC showed an excellent antimicrobial effect of Ag NPs and nanocomposites against E.coli, S. Aureus and K. pneumoniae bacteria and C. albicans yeast. In addition, it was determined that the total antioxidant and oxidant capacities of PFAEMA-NaCMC/Ag nanocomposites increased depending on the Ag NPs dose. In addition, dielectric constant (ε'), dielectric loss factor (ε'') and ac conductivity of PFAEMA-NaCMC and bionanocomposites were also measured for the frequency range of 100 Hz and 30 kHz at different temperatures. The frequency dependence of the dielectric constant and dielectric loss factor was observed to decrease with increasing frequency.