不同树龄湿加松原料特性及其制浆性能研究

Study on Material Characteristics and Pulping Properties of Pinus Elliottii×P. Caribaea with Different Ages

关键词:  湿加松  树龄  纤维形态  化学组分  硫酸盐法蒸煮

Key Words:pinus elliottii×p. caribaea  tree age  fiber morphology  chemical composition  kraft cooking

摘要:对6种4~14年生不同树龄的速生湿加松的化学组分、纤维形态进行了研究，并在相同蒸煮工艺条件下，对其硫酸盐法制浆性能进行了初步研究。结果表明，湿加松的综纤维素含量随树龄增加呈上升趋势，树龄超过10年后，其含量基本稳定在(74±3)%；木素含量则在树木生长早期略有提高，树龄超过8年后，其含量呈下降趋势；组分中苯-醇抽出物的含量在树龄超过10年后快速增加，其他组分含量变化不规律。湿加松木材的平均纤维长度为2~3 mm，长径比在58以上，且随树龄的增大而逐渐增大；树龄10年以上湿加松制备浆料卡伯值较低且黏度较高，制浆造纸经济性更好。

Abstract:The chemical composition and fiber morphology of 6 kinds of fast-growing pinus elliottii×p. caribaea with different ages from 4 to 14 years were studied， and their kraft pulping properties at same cooking conditions were evaluated. The results showed that the holo-cellulose content of pinus elliottii×p. caribaea gradually increased with the increasing of tree ages， and was stabilized at （74±3）% with tree age more than 10 years. Lignin content increased slightly in the early growth stage of the trees， whereas decreased after tree age more than 8 years. In addition， the phenyl ethanol extraction content among the few components increased rapidly after tree age more than 10 years， whereas other components content changed irregularly. The average fiber length of pinus elliottii×p. caribaea wood was 2~3 mm， and the draw ratio was more than 58， which gradually increased with the increase of tree ages. Meanwhile， the pulp from pinus elliottii×p. caribaea with a tree age more than 10 years had a lower kappa value and a higher viscosity， which were more economic efficient to pulping and paper making.