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Photo-yellowing Inhibiting of Chemi-mechanical Pulp by Reactive UV Absorber and Fluorescent Brightener
  
DOI：10.11980/j.issn.0254-508X.2012.07.001
Key Words:chemi-mechanical pulp  yellowing inhibitor  brightness stabilizer
Fund Project:陕西省自然科学基金项目——高分子荧光增白剂的制备及作用机理研究（项目编号：2009JM2010）。
Author NameAffiliation
张光华 陕西科技大学教育部轻化工化学与技术重点实验室，陕西西安，710021 
徐海龙 陕西科技大学教育部轻化工化学与技术重点实验室，陕西西安，710021 
郭锦鸽 陕西科技大学教育部轻化工化学与技术重点实验室，陕西西安，710021 
刘国俊 陕西科技大学教育部轻化工化学与技术重点实验室，陕西西安，710021 
石丽丽 陕西科技大学教育部轻化工化学与技术重点实验室，陕西西安，710021 
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Abstract:2,4-dihydorxybenzophenone photosensitizer（UVA） and triazine-stilbene fluorescent brighteners（FBs） were synthesized by nucleophilicity method with 2,4,6-trichloro-1,3,5-triazine and taurine as raw materials. The mixtures of FBs and UVA were used as a yellowing inhibitor and applied to the hand sheet of chemi-mechanical pulps by surface sizing and the anti-yellowing effect was evaluated by using the ultraviolet aging apparatus. The result showed that higher brightness stability of chemi-mechanical pulp handsheets were obtained with the application of above mixtures as surface sizing agent compared with the application of FBs and UVA alone respectively. With the mixing ratio of 1∶1 (FBs∶UVA), the brightness stabilizing effect increased significantly and could be proposed as a applicable yellowing inhibitor for lignin-containing paper products.
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