【摘要】 利用3种漆酶或漆酶/介体系统处理硫酸盐竹浆,并进行TCF漂白。结果显示,与传统的CEH漂白相比,硫酸盐竹浆进行包括漆酶/介体系统处理的OLQP漂白,在达到相近白度情况下,纸浆强度损失小;3种不同漆酶在HBT存在下的TCF漂白浆比CEH漂白浆黏度高43.3%~56.2%;从白腐菌HG产生的漆酶在HBT存在下处理硫酸盐竹浆,经OLQP漂白后,浆的白度可达80.7%ISO,黏度在800 mL/g以上。在没有外加介体的情况下,该漆酶处理纸浆仍具有较好的脱木素效果,经OL0QP(L0,无外加介体)漂白后,纸浆白度可达76.7%ISO,比OQP漂后的浆白度提高了23.2%ISO。更多还原

【Abstract】 The kraft bamboo pulp was treated with three laccases alone or those laccases combined with BT(1-hydroxybenzotriazole),subsequently bleached with QP sequence.The results showed that the viscosity loss is less for the pulp bleached with OLQP sequence compared with the pulp bleached with CEH sequence when the pulps are bleached to the same brightness.In general,the viscosity of the pulp bleached with OLQP is 43.3～56.2% higher than that bleached with CEH when the brightness of the pulps are the same.The oxygen delignified kraft bamboo pulp treated with the laccase from a white rot fungus HG in the presence of HBT can be bleached with QP to brightness 80.7 %ISO and with viscosity 800 mL/g.Moreover, the laccase from the white rot fungus HG can degrade lignin without HBT.The pulp is bleached with OL~0QP(without HBT) to brightness 76.7% ISO,which was 23.2 %ISO higher than that with OQP bleaching.更多还原