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林产化学与工业 ›› 2007, Vol. 27 ›› Issue (5): 117-121.

• 研究报告 • 上一篇    下一篇

麦草碱木质素改性聚氨酯的老化降解性能研究

靳帆, 方桂珍, 刘志明, 李克非, 李珊珊   

  1. 东北林业大学 生物质材料科学与技术教育部重点实验室, 黑龙江 哈尔滨 150040
  • 收稿日期:2006-11-10 修回日期:1900-01-01 出版日期:2007-10-30 发布日期:2007-10-30
  • 通讯作者: 方桂珍,教授,博士,博士生导师,从事木材化学方面的研究和教学工作

Aging Characterization of Straw Alkali-lignin Modified Polyurethane Film

JIN Fan, FANG Gui-zhen, LIU Zhi-ming, LI Ke-fei, LI Shan-shan   

  1. Key Laboratory of Bio-based Material Science and Technology, Ministry of Education, Northeast Forestry University, Harbin 150040, China
  • Received:2006-11-10 Revised:1900-01-01 Online:2007-10-30 Published:2007-10-30

摘要: 对麦草碱木质素改性聚氨酯薄膜(PUF)的热稳定性、热水稳定性、紫外光降解性能进行了测定.实验结果表明,加入20%碱木质素的聚氨酯薄膜与不含木质素的PUF相比:热氧化后的拉伸强度保留率由纯聚氨酯的89.3%提高到132.0%,拉伸率保留率由19.6%提高到66.3%;紫外光老化28 d后的拉伸率保留率由纯聚氨酯的9.4%提高到48.6%;热水老化后的拉伸强度保留率由74.8%提高到了95.5%;但加入碱木质素后PUF的耐碱性显著降低.

关键词: 麦草碱木质素, 聚氨酯薄膜, 热氧降解, 水解, 光降解

Abstract: The behaviors of thermal-oxidation, UV photolysis and hydrolysis of straw alkali-lignin modified polyurethane films (PUF) were tested respectively. The results show that the retain ratio of tensile strength of thermal-oxidation samples with addition of 20% lignin was enhanced from 89.3% to 132.0% comparied with pure PUF and the retain ratio of elongation was from 19.6% to 66.3%, as well as from 9.4% to 48.6% under UV for 28 d. The retain ratio of tensile strength after hydrolysis, was enhanced from 74.8% to 95.5%. However, the addtion of alkali-lignin reduced remarkably the alkali resistance of PUF.

Key words: straw alkali-lignin, polyurethane film, thermal oxidation, hydrolysis, photolysis

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