金平龙竹的化学成分与制浆性能

Chemical Components and Pulping Properties of Dendrocalamus peculiaris

对金平龙竹的化学成分、纤维形态、成浆性能进行了初步研究,结果表明:金平龙竹灰分、SiO2、冷水抽提物、热水抽提物、苯—醇抽提物、1%NaOH抽提物、木质素、多戊糖、纤维素质量分数分别为1.86%,0.67%,2.12%,3.96%,2.56%,18.35%,25.80%,13.76%,46.64%;纤维平均长度、长宽比分别为2.53mm,176.55。与造纸工业目前使用较多的慈竹、毛竹、云杉、马尾松、桉树等相比较,金平龙竹具有纤维平均长度较长、长宽比相当、纤维素质量分数较高、木质素质量分数较低的优势。该竹易于成浆,与针叶木比较撕裂强度较高,是一种优良的竹类纤维原料。

An experiment was conducted to study the chemical components, fiber morphology and pulping properties of Dendrocalamus peculiaris Hsueh ＆ D. Z. Li in Mengla County, Yunnan Province. Results show that the chemical components of D. peculiaris are determined as ash content 1.86%, SiO2 0. 67%, cold water extractive 2.12%, hot water extractive 3.96%, benzene-alcohol extractive 2.56%, 1% NaOH extractive 18.35%, Klason lignin 25.80%, pentosan 13.76%, and cellulose content 46. 64%. Fiber length of D. peculiaris is 2.53 mm, and length-width ratio is 176.55. D. peculiaris has a higher fiber length, a reasonable ratio of fiber length to width, a higher cellulose content and a lower Klason lignin content compared with Neosinocalamus afflnis, Phyllostachys pubesdeus, Picea asperata, Pinus massoniana and Eucalyptus globulus Labill. D. peculiaris with higher tearing strength is easier to pulp. There：fore, it is a good fiber material of bamboo for papermaking.