山黄麻作为造纸原料的基础评价

Evaluation of Trema Orientalis as a Papermaking Raw Material

关键词:  山黄麻  硫酸盐法蒸煮  纸浆  漂白

Key Words:Trema orientalis  sulfate cooking  pulp  bleaching

摘要:本研究对产自云南省西双版纳1.5年生的山黄麻（Trema orientalis）进行制浆造纸基础评价。结果表明，山黄麻的木质部纤维平均长度接近1.2 mm，综纤维素和酸不溶木素的含量分别为78%和21%。采用硫酸盐法制浆，在最高蒸煮温度160℃、NaOH用量21%、升温时间90 min、保温时间90 min的条件下，细浆得率为52.7%，再经氧脱木素-二氧化氯-过氧化氢加氧气强化的碱抽提（ODEop）短程漂白后，其纸浆得率99.6%，白度85.0%，漂白浆的抗张指数为79.0 N·m/g、耐破指数为5.15 kPa·m²/g、撕裂指数为5.81 mN·m²/g。

Abstract:For the evaluation of 1.5-year-old trema orientalis from Xishuangbanna, Yunnan Province, the fiber morphology and chemical composition of its xylem were examined, the average fiber length was close to 1.2 mm, total cellulose content was 78%, and the content of Klason lignin was 21%. Sulfate cooking of trema orientalis was conducted under the conditions of NaOH charge 21%, cooking maximum temperature 160℃, cooking time 180 min (including time to maximum temperature 90 min, time at maximum temperature 90 min), the screened yield was 52.7%. Resultant pulp was then bleached via ODEop bleaching sequence, the yield of bleached pulp was 99.6% and brightness 85.0%.The tensile index，burst index and tear index of bleached pulp was 79.0 N·m/g，5.15 kPa·m²/g and 5.81 mN•m²/g respectirely.