Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (6): 17-21.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

XPS Analysis of Cellulose Treated with Two Ionic Liquids

Zhang Jing-qiang1  Lin Lu1  He Bei-hai1  Liu Shi-jie2  Ouyang Ping-kai3   

  1. 1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. College of Environmental Science and Forestry,, State University of New York, New York 13210, USA; 3. College of Medicine and Life Science, Nanjing University of Technology, Nanjing 210009, Jiangsu, China
  • Received:2008-05-15 Revised:2008-08-03 Online:2009-06-25 Published:2009-06-25
  • Contact: 林鹿（1962-），男，教授，博士生导师，主要从事植物资源化学与生物技术研究．E-mail：lclulin@scut．edu．cn E-mail:zsyaoyao@126．com
  • About author:张景强（1974-），男，博士生，主要从事植物资源化学与化工产品研究．
  • Supported by:

    国家自然科学基金资助项目（U0733001,50776035）;教育部重大项目培育资金（705048）;国家“863”计划项目（2007AA052408）

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Abstract:

Two kinds of ionic liquids, namely, 1 -allyl-3-methylimidazolium chloride （ [ Amim ] C1） and 1 -butyl-3- methylimidazolium chloride （ [ Bmim ] C1）, were respectively used to decrystallize microcrystalline cellulose （MCC） for 20, 40 and 60 rain. XRD spectra show that, after the treatment with [ Amim ] C1 or [ Bmim ] C1, the crystalline index of MCC decreases from 90.2% to 72. 4% or to 66.8%. Moreover, XPS spectra indicate that, different from the relative content of chemical bonds, the chemical-bond type of cellulose macromolecules shows no obvious change after the decrystallization; and that the relative content changes of C--OH and C--OH…O are highly related to the variation of crystalline index, with the conelation coefficients being 0. 9990 and 0. 9846, respectively.

Key words: cellulose, ionic liquid, X-ray photoelectron spectroscopy, decrystallization