Effect of Neutral Xylanase Pretreatment on ECF Bleaching of KP Bamboo Pulp with Low Kappa Number
At present,most of the studies of Xylanase auxiliary bleaching focused on in the alkaline or acid conditions.It was investigated in this paper that Neutral Xylanase had been used to pretreat the oxygen delignified KP bamboo pulp with low kappa number.The effect of Xylanase on the follow-up ECF bleaching was discussed,especially highlighting the principle of the residual lignin removal and improvement of pulps brightness.Results showed that the effect of neutral xylanase pretreatment on ECF bleaching of KP bamboo pulp was obvious.The pulp with a higher brightness and brightness stability could be obtained in this way.The optimum charge ofxylanase is 0.6IU·g-1,and The brightness of the bleached pulp could reach 87.8%ISO,the color reversion value 0.016,viscosity 764mL·g-1.It was 2.9%ISO higher in brightness,59mL·g-1 higher in viscosity,but the color reversion value is only 30.2% of the later,compared to the pulp without xylanase pretreatment.
Neutral Xylanase Pretreatment ECF Bleaching Bamboo Pulping
Jinbao Li Meiyun Zhang Xinxing Xia Yijuan Liu
College of Papermaking Engineering, Shaanxi University of Science and Technology, Xian, China,710021
国际会议
太原
英文
260-264
2012-06-23（万方平台首次上网日期，不代表论文的发表时间）