This study was done in order to investigate the brightness property of soda paper produced from Bagasse. The paper samples were wetted using chelating agent of EDTA (Ethylene Diamine Tetra acetic Acid) in various concentration levels. This process neutralizes available metallic ions in paper samples. After drying wetted samples with EDTA, they are wetted again by solutions containing transitional metal ions. For accelerating aging tests, a simulated apparatus was used for accelerated light induced aging tests. 6 UV lamps of Black Light and 4 regular fluorescent lamps.The output frequency of photo-aging was in range of 300 to 400 nm. Light induced treatments were implemented in time spans of 0, 10, 20, 30 and 40 hours. All measurements were done on the basis on TAPPI standard. The obtained results demonstrated that increasing concentration of the chelating agent will decrease brightness of the samples significantly, whereas their brightness was increased significantly by extending the aging time. Results revealed that the most prevalent effect on decreasing of brightness property was associated with Fe2+ ions while the least considerable one was related to ions of Zn2+.
کلید واژگان :Aging Brightness Soda Ethylene Diamine Tetra acetic Acid Wavelength
ارزش ریالی : 300000 ریال
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