【摘要】 本研究以工业大麻落麻纤维为原料，探讨了超声波与生物复合酶协同预处理，结合后续硫酸盐法蒸煮工艺对纸浆性能的影响规律，并分析了落麻纤维的PFI打浆特性及其配抄包装纸的力学性能。结果表明，在超声频率40 kHz、温度50℃的条件下处理30 min，且果胶酶与漆酶的质量比控制为5∶1，复合酶液质量分数为12%（相对于纤维质量）时，在总碱量18%、硫化度12%、液比1∶4、升温时间30 min、保温时间90 min、蒸煮温度110℃的条件下进行制浆，所得纸浆的性能最优，撕裂指数可达22.5 mN·m~2/g、耐折度485次、耐破指数2.90 kPa·m~2/g、抗张指数43.2 N·m/g；浆浓10%，经PFI打浆30 000 r处理后，当落麻纤维配比达40%时，配抄所得纸张的力学性能显著提升，此时撕裂指数10.2 mN·m~2/g、耐折度106次、耐破指数1.26 kPa·m~2/g、抗张指数46.2 N·m/g。更多还原

【Abstract】 This study used industrial hemp noil fibers as raw material to investigate the influence patterns of ultrasonic and bio-composite enzyme synergistic pretreatment combined with subsequent kraft pulping process on pulp properties. Additionally, it analyzed the PFI refining characteristics of noil fibers and the mechanical properties of packaging paper produced by blending them. The results showed that when treated for 30 min under ultrasonic conditions of a frequency of 40 kHz and a temperature of 50 ℃, with the mass ratio of pectinase to laccase controlled at 5∶1 and the mass fraction of composite enzyme solution at 12%(relative to fiber mass), followed by pulping under conditions of 18% total alkali, 12% sulfidity, a liquor ratio of 1∶4, a heating-up time of 30 min, a holding time of 90 min, and a cooking temperature of 110 ℃, the resulting pulp exhibited optimal properties, with a tear index reaching 22.5 mN·m~2/g, a folding endurance of 485 times, a burst index of 2.90 kPa·m~2/g, and a tensile index of 43.2 N·m/g. After refining at a pulp consistency of 10% with 30 000 r in a PFI refiner, when the proportion of noil fibers reached 40%, the mechanical properties of the paper produced by blending were significantly enhanced, showing a tear index of 10.2 mN·m~2/g, a folding endurance of 106 times, a burst index of 1.26 kPa·m~2/g, and a tensile index of 46.2 N·m/g.更多还原