Modified Hydrogen Peroxide Bleaching of Bamboo Chemo-mechanical Pulp Using Aqueous Alcohol Media

Fangmin Liang, Guigan Fang, Jian Jiao, Yongjun Deng, Shanming Han, Hongbin Li, Qingwen Tian, Aixiang Pan, Beiping Zhu


The brightness of bleached bamboo chemo-mechanical pulp (CMP) is often too low to be used as a furnish in value-added paper products. In this study, preliminary optimization of various parameters of a modified hydrogen peroxide (H2O2) bleaching procedure for bamboo CMP pulps was performed using the inclusion of ethanol in the bleaching medium (IEBM). Compared with a conventional bleaching method, this modified process is aimed at improving bleaching efficiency and brightness ceiling of bamboo CMP with the proper usage of chemicals. The CMP was bleached to a brightness of 74.2% ISO at the usage level of 12% H2O2, which shows it increased by 7.4% ISO compared with the conventional method. For a brightness target of 72.0% ISO, bleaching with the IEBM method reduced the H2O2 consumption by approximately 60%. In addition, a higher activation energy of H2O2 for the IEBM method was calculated to be 23.3 kJ/mol, which was increased by 3.3 kJ/mol compared with the conventional method.


Bamboo; Hydrogen peroxide; Chemo-mechanical pulp; Bleaching

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