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林产化学与工业 ›› 2002, Vol. 22 ›› Issue (04): 15-18.

• 研究报告 • 上一篇    下一篇

木材高压萃取木质素的热机械分析

钱学仁, 李坚   

  1. 东北林业大学, 材料科学与工程学院, 黑龙江, 哈尔滨, 150040
  • 收稿日期:2001-12-26 修回日期:1900-01-01 出版日期:2002-12-30 发布日期:2002-12-30

THERMOMECHANICAL ANALYSIS OF LIGNIN DERIVED FROM HIGH PRESSURE EXTRACTION OF WOOD

QIAN Xue-ren, LI Jian   

  1. College of Materials Science and Engineering, Northeast Forestry University, Harbin 150040, China
  • Received:2001-12-26 Revised:1900-01-01 Online:2002-12-30 Published:2002-12-30

摘要: 木质素的热流动性似乎对其在工业领域的各种应用都是必需的,如木质素转化为薄膜、纤维及其它塑料。本研究采用热机械分析(TMA)对兴安落叶松(Larix gmelinii Rupr.)木材近临界高压乙醇 水萃取的木质素的热行为进行了考察。结果表明,高压萃取木质素的热性能明显优于硫酸盐木质素的,前者的玻璃转化温度较低,并具有部分熔融特性。因此,高压萃取木质素可不必像硫酸盐木质素那样经化学修饰才有可能转化为可熔材料。

关键词: 木质素, 热机械分析(TMA), 高压萃取, 落叶松

Abstract: Thermal fluidity of lignin seems to be necessary for various applications of lignin in industrial fields,such as transformation of lignin into membranes,fibers and plastics.Thermal behavior of lignin derived from near critical and high pressure ethanol water extraction of Larix gmelinii Rupr.wood was investigated by thermomechanical analysis(TMA) in this study.Result showed that thermal properties of high pressure extracted lignin were markedly superior to those of kraft lignin.The former had a lower glass transition temperature,and had partially fusible characteristics.Thus,high pressure extracted lignin could directly be converted to fusible materials,unlike kraft lignin requiring chemical modification.

Key words: lignin, thermomechanical analysis(TMA), high pressure extraction, Larix gmelinii Rupr.

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