欢迎访问《林产化学与工业》,

林产化学与工业 ›› 2014, Vol. 34 ›› Issue (5): 41-46.doi: 10.3969/j.issn.0253-2417.2014.05.007

• 研究报告 • 上一篇    下一篇

微波辅助离子液体溶解木质素的研究

刘仕伟, 周红霞, 李露, 于世涛, 解从霞, 刘福胜   

  1. 青岛科技大学 化工学院, 山东 青岛 266042
  • 收稿日期:2013-08-02 出版日期:2014-10-25 发布日期:2015-08-18
  • 作者简介:刘仕伟(1978-),男,山东泰安人,副教授,硕士生导师,主要从事生物质转化利用工程方面的研究
  • 基金资助:
    国家自然科学基金资助项目(31370570,31100430)

Solubility of Lignin in Ionic Liquid by Assistance of Microwave Energy

LIU Shi-wei, ZHOU Hong-xia, LI Lu, YU Shi-tao, XIE Cong-xia, LIU Fu-sheng   

  1. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
  • Received:2013-08-02 Online:2014-10-25 Published:2015-08-18
  • Contact: 于世涛,男,教授,博士生导师,主要从事催化、精细化工及林产化工方面的研究;E-mail:yushitaoqust@126.com E-mail:yushitaoqust@126.com

摘要: 设计合成、表征了5种磷酸酯基离子液体,并考察了油浴加热和微波加热下其对木质素的溶解性能。结果表明,微波加热下离子液体1,3-二甲基咪唑磷酸甲酯盐([Mmim] DMP)对木质素具有良好的溶解性能,在55 ℃下搅拌30 min,木质素在离子液体中溶解度可达60.0 g;采用FT-IR、SEM和XRD等表征技术对溶解后的再生木质素的化学结构、表观形貌及晶型变化进行了表征,结果表明再生木质素的化学结构并未发生变化,但颗粒更均匀、分散性更好且弥散衍射特征更强烈;此外,离子液体具有较好的回收和重复使用性能,100 g[Mmim] DMP重复使用5次后,其回收量达97.0 g,木质素溶解度达57.8 g。

关键词: 微波, 离子液体, 溶解, 木质素

Abstract: Five phosphite-based ionic liquids were synthesized, characterized, and used to dissolve lignin under oil bath and microwave heating. It was found that ionic liquid 1,3-dimethylimidazolium phosphate [Mmim] DMP had good solubility performance, and the solubility of lignin was 60.0g at 55℃for 30 min. The chemical structure, morphology and crystalline of re-generated lignin from microwave treatment were characterized by FT-IR, SEM, and XRD. The results indicated that the structure of re-generated lignin was unchanged, and the particle had good dispersity and strong diffractive feature. On the other hand, ionic liquid [Mmim] DMP had good reusability. When 100 g[Mmim] DMP was reused for five times, its recovery capacity and lignin solubility were 97.0 g and 57.8g, respectively.

Key words: microwave, ionic liquid, dissolve, lignin

中图分类号: