纤维素酶辅助磨浆的增强节点研究

Effect of cellulase-assisted refining on pulp strength node

以纤维素酶和漂白针叶木浆为原料,探索纤维素酶辅助磨浆对纸张抗张强度、撕裂强度、耐破度等强度指标的增强节点,并通过纤维质量分析仪,观测纤维素酶辅助磨浆中纤维的形态。结果表明:生物酶用量对生物酶辅助磨浆的成纸强度存在增强节点,抗张强度节点出现在生物酶用量0.04%处,耐破强度、撕裂强度节点出现在生物酶用量0.02%处。在成纸强度节点处,相对未添加生物酶浆样,打浆度为30°S R的成纸抗张强度增加39.79%,打浆度为30°S R的成纸撕裂强度增加18.84%,打浆度为60°S R的成纸耐破强度增加49.75%。纤维形态分析显示,纸浆纤维数均长度随生物酶用量的增加先增加后减少。生物酶用量超过0.02%时,纤维疏松,纤维表面起毛、细纤维化显著。

Cellulase and bleached softwood pulp were used to study the effect of cellulase-assisted refining pulp on pulp strength node, such as tensile, tear, and bursting strengths, etc. Morphological data of fibres from cellulase-assisted refilling processes was also obtained by means of a Fibre Quality Analyzer （FQA）. The results showed that pulp strength node is observed with different additions of cellulose in the cellulase-assisted refining processes. Tensile strength node was observed with addition of cellulose 0.04%, based on o.d. pulp. However, the nodes of tear and bursting strengths were observed with addition of cellulose 0.02%, based on o.d. pulp. With the strength nodes, tensile and tear strengths were increased by 39.79% and 18.84% respectively, at beating degree of 30° SR, compared with the samples with 11o cellnlase added. The bursting strength was increased by 49.75% at beating degree of 60° SR. The results from FQA showed that the average len cellulase addition increases initia and fibers become swollen, napped gth of fibers increases as the Ily and decreases afterwards, and fibrillated.