This research has been launched to study effect of optical aging of soda papers from bagasse on yellowness properties using chelating agent and metallic ions. Paper samples were prepared in Pars paper plant while chelating agents in different concentrations were used to neutralize metallic ions. They were exposed to the metallic ions after being dried well. For accelerated aging examinations, wavelength range of 300-400 nm was used in 0, 10, 20, 30, 40 and 50 h intervals. Yellowness of the papers was eventually evaluated based on TAPPI standard. The results demonstrated that increasing concentration of the chelating agent will decrease yellowness of the samples significantly, whereas their yellowness was increased significantly by extending the aging time. The most pronounced effect on increasing the yellowness was related to Fe2+ ion while the least pronounced effect was related to Zn2+ and Cu2+ ions.
کلید واژگان :Optical aging, Soda papers, Bagasse, Yellowness.
ارزش ریالی : 1200000 ریال
با پرداخت الکترونیک