化学和物理方法处理大麻纤维的研究

为了制备微纤化大麻纤维，除去纤维素之间的木质素（粘合剂）和使纤维沿纤维轴方向撕裂，研究了新的化学（室温碱、酸蒸汽、80℃碱）和物理（高压蒸汽）处理大麻纤维的方法 。用SEM观察了不同处理阶段大麻纤维的形态，用FT-IR表征了处理和未处理大麻纤维的结构和处理液固体残留物的结构，用TGA测定了化学和物理处理对大麻纤维热稳定性的影响。 结果表明，经化学和物理处理后可得微纤化大麻纤维，大麻纤维的纤维素含量提高，木质素 含量降低，热稳定性提高。

Chemical and physical treatments on hemp fibers

To obtain micro fibrils from hemp fibers, the binder has to be cleaned off firs t, so that the fibers can be torn off along the cellulose axis. A new method was developed to treat the hemp fibers in the chemical and physical ways. The conditions of t reatments were discussed in detail. The morphologies of fibers during the differ ent stages of chemical and physical treatments were observed by SEM. The structu re of treated and untreated hemp fibers and the solid residues after the chemica l treatments were analyzed by FT-IR. The effects of chemical and physical treat m ents on the thermal stability of hemp fibers were measured by TGA. The experimen tal results indicate that the micro fibrils from hemp fibers were formed after chemical and physical treatments, with the cellulose content increasing, the lig nin content decreasing, and the thermal stability enhancing.