不同树龄日本落叶松的化学组成与制浆特性  

Chemical Compositions and Pulping Properties of Larix kaempferi

作　　者：石淑兰[1] 谢新良[1] 胡惠仁[1] 张守攻[2] 王军辉[2] 

机构地区：[1]天津科技大学材料科学与化学工程学院,天津300222 [2]中国林业科学研究院林业研究所,北京100091

出　　处：《林业科学》2006年第7期90-94,共5页Scientia Silvae Sinicae

基　　金：国家"十五"科技攻关项目子课题"落叶松良种选育和高效栽培技术"(2002BA515B0401)的部分研究内容

摘　　要：对不同树龄日本落叶松的化学组成和硫酸盐法制浆特性进行研究与比较。结果表明:随着树龄的增大,原料中碳水化合物含量逐渐降低;冷水抽出物、热水抽出物和1%NaOH抽出物含量增加。碳水化合物组成中,随树龄增大,葡萄糖和木糖含量降低,半乳糖含量增加。通过对日本落叶松硫酸盐法制浆工艺参数的优化研究,确定最佳蒸煮条件为:用碱量(Na2O计)21%、硫化度25%、液比1∶4、最高温度170℃、保温时间2.5h。随着树龄的增大,蒸煮耗碱量增加,纸浆硬度增高。树龄较小的12年生日本落叶松纸浆的物理强度性能较好。综合对不同树龄日本落叶松化学组成和硫酸盐法制浆特性研究结果认为:12年生日本落叶松的硫酸盐法制浆性能优于树龄较大的日本落叶松,23年生日本落叶松的制浆性能相对较差。The chemical compositions and pulping properties of Larix kaempferi in different tree ages were investigated. In results, with the growing of L. kaempferi, the total carbohydrate decreases, water extractives including cold water extractives and hot water extractives increase, and 1% NaOH extractives also increase; glucosan and xylan decrease, however, galactosan increases. After investigating the influence of alkali charge, sulfidity and time at max. temperature on L. kaempferi kraft pulping, we found the optimal technical conditions of pulping are that alkali charge（to Na2O） is 21%, sulfidity is 25%, the max. temperature is 170 ℃ and time at max. temperature is 2.5 h. Furthermore, with the growing of L. kaempferi, the trees become harder to cooking, alkali consumption and kappa number of pulp increase; the physical property of the pulp of 12 years old L. kaempferi woods are better than those of the two other aged trees. So through a analysis the result of chemical compositions and pulping properities of L. kaempferi by synthesis, we can conclude that 12 years has an advantage over those aged more than 20 years in papermaking for L. kaempferi.

关 键 词：日本落叶松 树龄 化学组成 硫酸盐法制浆 纸浆物理性能 

分 类 号：S791.24[农业科学—林木遗传育种]