Preparation of chelating fibers-modification of poly(vinyl formal) fiber

The chelating fiber containing amidoxime group has been synthesized by graft copolymerization of acrylonitrile (AN) onto Poly (vinyl formal) Fiber (PVF) after electron-beam (EB) preirrradiation. The article systematically studies the influence factors of grafting rate. Such as absorbed does, reaction temperature and time, monomer concentration. Optimum grafting result could be achieved by irradiating the PVF to 300kGy and reacting for 1 hours at 70 ℃ with 10 % monomer concentration of AN, while adding 0.05 mol/L H2SO4 and Mohr's salt of 0.1 w %. The structure of the chelating fiber has been indicated by FT-IR and revealed the total grafting rate which varied with several factor.