EFFECT OF LACCASE PRETREATMENT ON HYDROGEN PEROXIDE BLEACHING OF BAMBOO SCMP
The effect of laccase pretreatment on hydrogen peroxide bleaching of bamboo SCMP was discussed. The change of fiber surface after laccase pretreatment was analyzed by X-ray photoelectron spectroscopy (XPS). The results revealed that laccase pretreatment could improve the bleachability and brightness stability of SCMP. The optimal laccase pretreatment conditions were laccase 5IU/g, HBT 0.5％, oxygen pressure 0.2MPa, pH 6 and temperature 50℃. Under these conditions the brightness and PC number of pulp bleached by H2O2 were 60％ISO and 2.03. The analysis of XPS showed that 91.19％ of pulp fiber surface was covered with lignin after laccase treatment, but before the treatment only 55.58％ of fiber surface was covered. Lignin precipitated on the fiber surface after laccase treatment could be easily removed in H2O2 bleaching.
bamboo SCMP hydrogen peroxide XPS
Li Bingyun Zhan Huaiyu Liang Chen Fu Shiyu
State Key Laboratory of Pulp and Paper Engineering,South China University of Technology, Guangzhou,510640, China
国际会议
广州
英文
645-648
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）