采用荧光增白剂提高杨木BCTMP的光学稳定性  

Application of Fluorescent Whitening Agents to Improve the Optical Stability of Aspen BCTMP

作　　者：张红杰[1] 胡惠仁[1] 魏德津[1] 徐治国[1] 

机构地区：[1]天津科技大学材料科学与化学工程学院天津市制浆造纸重点实验室,天津300457

出　　处：《天津科技大学学报》2008年第2期14-17,21,共5页Journal of Tianjin University of Science & Technology

基　　金：天津市高等学校科技发展基金资助项目(20060511);天津科技大学引进人才科研启动基金资助项目(20060436)

摘　　要：近年来,阔叶木高得率浆由于其独特的性能在许多高附加值纸种中得到广泛应用.然而,由于高得率浆自身含有大量木素,很容易发生光致返黄,使其在高级纸中的应用受到极大阻碍.本文采用荧光增白剂(FWA)作为高得率浆的光学稳定剂,通过浆内添加系统探讨FWA提高高得率浆光学稳定性的作用效果.结果表明:二磺酸和四磺酸型FWA在浆内添加时抑制高得率浆返黄的效果较好,而六磺酸型的效果较差.浆料pH为中性或弱碱性,需要一定的混合时间.另外,填料在一定程度上可以协助FWA提高高得率浆的光学稳定性.In recent years, hardwood high yield pulp （HYP） with its unique properties has found increased applications in many value-added paper grades .However, one of the main drawbacks to limit its wider use is related to the optical properties of HYP, which is the photo yellowing due to its high lignin contents.In this paper, the fluorescent whitening agents （FWA） were used as inhibitors for HYP, and its effectiveness was determined through adding in wet-end.The results show that good inhibiting effect can be got when 2S- or 4S-type FWA is used in papermaking wet end;while 6S-type FWA is relatively worse.The neutral or weak alkaline pH and a certain mixing time are needed for FWA application in papermaking wet end.Fillers can help FWA to improve the brightness stability of HYP to some extent in wet end.

关 键 词：荧光增白剂 高得率浆 返黄 光学稳定性 

分 类 号：TS727[轻工技术与工程—制浆造纸工程]