NaOH-AQ法蒸煮过程中用碱量对剑麻浆纤维力学性能的影响

Effects of Alkali Dosage on the Mechanical Properties of Sisal Pulp Fibers During NaOH-AQ Cooking Process

关键词:  剑麻浆  用碱量  力学性能  蒸煮

Key Words:sisal pulp  alkali dosage  mechanical properties  cooking process

摘要:本研究对烧碱-蒽醌（NaOH-AQ）法蒸煮过程中不同用碱量下的剑麻浆纤维力学性能差异进行了系统分析。同时，对其纤维形态、微纤丝角、结晶度以及木质素含量进行研究，以探究其与单根纤维力学性能的协同效应。结果表明，随着用碱量从12%升至30%，剑麻浆单根纤维的弹性模量由12.60 GPa降至6.99 GPa；柔软度指数由0.54×10¹⁷/(N·m²)增至3.15×10¹⁷/(N·m²)；细胞壁硬度在用碱量18%时达到最大值449.20 MPa，纸张的零距抗张指数在用碱量15%时达到最大值177 N·m/g。

Abstract:This study systematically evaluated the mechanical properties of sisal pulp fibers under different alkali dosages during the NaOH-AQ cooking process. It also analyzed the fiber morphology， microfibril angle， crystallinity， and lignin content to explore their synergistic effect on the mechanical properties of individual fibers. The results showed that as the alkali dosage increased from 12% to 30%， the elastic modulus of sisal pulp single fibers decreased from 12.60 GPa to 6.99 GPa， the softness index increased from 0.54×10¹⁷/（N·m²）to 3.15×10¹⁷/（N·m²）， the cell wall hardness reached its maximum value of 449.20 MPa at alkali dosage of 18%， and the zero-span tensile index of the fibers reached its maximum value of 177 N·m/g at alkali dosage of 15%.