LAUSR

In this investigation, a novel biodegradable poly(ester-imide-sulfonamide)s (PEIS)s containing natural amino acids in the backbone of polymer was synthesized. The dehydrogenase activity assay approved the biodegradability of synthesized polymers under soil burial and non-toxicity behavior of PEISs for soil microorganisms. PEIS containing silver nanoparticles was fabricated by in situ method using dimethylformaide (DMF) as a solvent which leads to a spontaneous reduce in room temperature. Furthermore, these biopolymer nanocomposite/Ag thin film were immobilized on glass microbeads. The chemical structures of synthesized PEIS and PEIS/Ag bionanocomposite were considered by FT-IR, 13C-NMR, 1H-NMR spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), elemental analysis, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy and energy dispersive X-ray (EDAX). The presence of silver nanoparticles was also confirmed by different techniques and their dispersion properties were confirmed by transmission electron microscopy (TEM) which showed good dispersion of Ag nanoparticles in PEIS matrix at nanoscale. Antibacterial properties of the synthesized PEIS/Ag bionanocomposite thin film which stabilized on glass microbeads were evaluated against Escherichia coli removal, an indicator of water pollution.