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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (24): 3013-3018.DOI: 10.6023/A1106071 上一篇    下一篇

研究论文

氨水/离子液体微乳液（DAIME）的制备及其对木质纤维的物理化学作用

汪滨1, 杨仁党*,1,2, 施伟健1, 刘德桃1, 祝磊1   

  1. (1华南理工大学制浆造纸工程国家重点实验室 广州 510640)
    (2华南理工大学亚热带建筑科学国家重点实验室 广州 510640)
  • 投稿日期:2011-07-07 修回日期:2011-07-15 发布日期:2011-08-17
  • 通讯作者: 杨仁党 E-mail:rdyang@scut.edu.cn
  • 基金资助:

    国家重点基础研究发展规划“973”计划;教育部高校博士点基金;国家自然科学基金;华南理工大学中央高校基本科研业务费项目;制浆造纸工程国家重点实验室开放基金项目

Preparation of Doping Ammonia-Ionic Liquid Microemulsion (DAIME) and Its Physical-Chemistry Effect for lignocellulose

Wang Bin1; Yang Rendang*,1,2; Shi Weijian1; Liu Detao1; Zhu Lei1   

  1. (1 State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640)
    (2 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640)
  • Received:2011-07-07 Revised:2011-07-15 Published:2011-08-17

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研究了氨水及其掺杂条件对1-丁基-3-甲基咪唑氯盐([Bmim]Cl)/环己烷/正丁醇/十六烷基三甲基溴化铵(CTAB) 稳定性的影响, 深入探讨掺杂氨水/离子液体微乳液(DAIME)对生物质竹材的渗透能力及其预处理影响规律, 并采用傅立叶红外光谱(FT-IR)和扫描电镜(SEM)进行了表征. 研究结果表明: 氨水掺杂量及温度的变化对DAIME体系稳定性影响较小|氨水和[Bmim]Cl的作用赋予DAIME体系更强的渗透能力, 达到90%以上|DAIME处理对生物质组分的降解具有很好的选择性, 能较好地保护纤维素, 而对木质素具有明显的降解脱除效果, 经70 ℃条件下处理16 h后, 木质素的脱除率达到33.7%. FT-IR分析表明半纤维素在DAIME处理过程中发生了脱乙酰化反应, 且碳水化合物-木素复合物(LCC)之间的连接键发生断裂. SEM研究表明经DAIME处理后生物质材料表面明显出现断层、破裂和大量孔洞结构.

关键词: 离子液体微乳液, 氨水掺杂, 渗透能力, 预处理

The effect of ammonia amounts and doping condition on the stability of 1-butyl-3-methylimidazolium chlorine ([Bmim]Cl)/cyclohexane/n-butanol/cetyl trimethyl ammonium bromide (CTAB) microemulsion were studied. The permeability of DAIME for biomass bamboo and the regularity for pretreatment were investigated further, and characterized by FT-IR and SEM. The DAIME system showed excellent stability after doping ammonia and changing temperature. The effect of ammonia and [Bmim]Cl endowed the DAIME system great permeability which could achieve more than 90%. DAIME pretreatment for biomass material showed perfect selectivity, and the cellulose was well protected, while the lignin had been degraded and removed partially. The lignin removal rate could achieve 33.7% after treating 16 h in 70 ℃. The FT-IR results indicated that the hemicellulose had been acetylated and the chemical bonds between lignin and carbohydrate (LCC) were broken during pretreatment process. The SEM demonstrated that the surface of biomass material significantly showed fault, fracture, and tremendous amount of holes after DAIME pretreatment.

Key words: ionic liquid microemulsion, doping ammonia, permeability, pretreatment