摘要
为了深入了解日本落叶松的制浆特性,对不同树龄、部位日本落叶松木材的纤维形态、化学组成、糖类组成、KP法制浆性能进行了分析。结果表明,日本落叶松的木材纤维较长,平均纤维长度为2.5～3mm,其中15年生日本落叶松的木材平均纤维长度最大,且长宽比也最大;而12年生日本落叶松的木材纤维长度分布频率最为集中。纤维宽度和粗度随着树龄增大而减小。冷水抽出物、热水抽出物和1%NaOH抽出物的含量随着树龄的增大而增加;灰分含量随着树龄的增加而略有降低;其他化学组成的含量随着树龄的增大变化规律不明显,综纤维素含量约为70%,酸不溶木素含量约为27%,酸溶木素含量为0.29%,聚戊糖含量为12%～13%。12年生日本落叶松木材的热水抽出物、1%NaOH抽出物和木素含量较低,综纤维素和聚戊糖含量较高;而15和23年生日本落叶松木材的热水抽出物、1%NaOH抽出物、木素和综纤维素含量相近。不同树龄日本落叶松木材中各聚糖的组成比较接近,总碳水化合物含量随着树龄的增大而降低。与23年生日本落叶松木材相比,12与15年生木材中聚葡萄糖含量较高,聚半乳糖含量较低,对提高制浆得率比较有利。随着树龄的增大,日本落叶松木材的蒸煮性能呈下降趋势,蒸煮耗碱量也随之增加。
The stable supply of raw material is a key problem in the development of paper industry in China.Japanese larch is a promising material for papermaking because of its fast-growing characteristics and high wood density.This paper investigated fiber form,chemical and saccharine compositions and pulping properties of Japanese larch at different ages (12,15 and 23 years).As a result,the fiber form and chemical compositions of Japanese larch at different ages have certain differences.The fiber length varys from 2.5 mm to 3 mm.Fiber width and fiber thickness vary regularly with tree ages.With the growing of Japanese larch tree,the total carbohydrate decreases,water extraction and 1% NaOH extraction increase;glucose and xylose decrease,glucose increases,the trees become harder to cook.The physical performance of the pulp of 12-year old Japanese larch is better than those of the two other aged trees.By comparing the pulping property,12-year and 15-year Larix kaempferi have an advantage over those aged more than 20 years in papermaking.
出处
《西北农林科技大学学报（自然科学版）》
CSCD
北大核心
2005年第2期117-122,共6页
Journal of Northwest A&F University(Natural Science Edition)
基金
国家"十五"科技攻关子课题"落叶松良种选育和高效栽培技术"(2002BA515B0401)
国家"863"项目"优质专用纤维材新品种培育技术"(2001AA244061)
关键词
日本落叶松
树龄
硫酸盐法
制浆性能
Larix kaempferi
tree age
kraft pulp
pulping property
