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以三倍体毛白杨为原料进行P-RC APMP制浆,优选并固定其他工艺条件,控制高浓停留段用碱量为3.0%(以NaOH计),探讨高浓停留段Mg(OH)2取代NaOH比例对纸浆的成纸物理性能(白度、松厚度、强度)以及保水值、纤维形态的影响。结果表明,随着Mg(OH)2取代比例的增加,纸浆的白度均高于75%ISO,在取代比例低于50%时,对纸浆白度会产生积极的影响;当Mg(OH)2取代比例由0增加至75%时,成纸的松厚度由2.12 cm3.g-1提高到2.67 cm3.g-1;当Mg(OH)2取代比例由0增加至50%时,抗张指数由26 N·m·g-1下降到18 N·m·g-1,撕裂指数由3.9mN·m2·g-1下降到2.7 mN·m2·g-1;浆料的保水值、纤维长度、纤维扭结指数和扭结角均随着Mg(OH)2取代量的增加而下降。
The triploid Populus tomentosa P-RC APMP pulping pulp, optimization and fixation of other process conditions, control of the high concentration of the suspended segment with a base amount of 3.0% (calculated as NaOH), to discuss the high concentration of Mg (OH) 2 substitution NaOH ratio on the paper pulp physical properties (whiteness, bulk, strength) and water retention, fiber morphology. The results showed that the whiteness of the pulp was higher than 75% ISO with the increasing of the substitution ratio of Mg (OH) 2, and the whiteness of the pulp had a positive effect when the substitution ratio was less than 50% 2 substitution ratio increased from 0 to 75%, the bulk of the paper increased from 2.12 cm3.g-1 to 2.67 cm3.g-1; when the Mg (OH) 2 substitution ratio increased from 0 to 50%, the tensile strength The index decreased from 26 N · m · g-1 to 18 N · m · g-1, and the tear index decreased from 3.9 mN · m2 · g-1 to 2.7 mN · m2 · g-1. Fiber length, fiber kink index and kink angle decreased with the increase of Mg (OH) 2 substitution.