Ethanolamine, a novel linker for the covalent functionalization of cellulose acetate membranes

摘要: The sol-gel silver-silica solutions were prepared by mixing two silane precursors that contain various functional groups (methyl and glycidyl) with different solutions of AgNO3, in the presence of titanium (IV) isopropoxide as cross-linking agent. The syntheses were conducted in acidic medium, at room temperature. The final samples were characterized both as powders (obtained after solvent evaporation) and as hybrid thin films (deposited on glass substrates) in order to investigate the structural, optical and morphology properties.• Results and discussions The functional groups present in the silver-silica materials were identified by FT-IR spectroscopy. The Si–O–Si characteristic modes (1000–1200 cm-1) were found in all samples (asymmetric stretching). Thermogravimetric analysis was employed in an N2 atmosphere to evaluate the thermal stability of the sol-gel silver-silica materials. To determine several significant effects, the weight loss was studied over three temperature intervals: 0–200 C, 200–500 C and 500–700 C. The transmittance and diffuse reflectance of the hybrid thin films deposited on glass substrates were measured using a UV-visible spectrometer. The UV-visible spectra reveal that all hybrid films were highly transparent. The AFM results indicated that the surface morphology can be changed as function of AgNO3 solution added during the formation of silica matrix.