华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (4): 86-90.

• 化学化工 • 上一篇    下一篇

阳离子蔗渣半纤维素的合成及表征

任俊莉 孙润仓 刘传富 张爱萍 何北海 林鹿   

  1. 华南理工大学 制浆造纸工程国家重点实验室,广东 广州 510640
  • 收稿日期:2006-03-27 出版日期:2007-04-25 发布日期:2007-04-25
  • 通信作者: 任俊莉(1978-),女,博士生,主要从事植物资源化学研究. E-mail:waterlilyjinan@126.com
  • 作者简介:任俊莉(1978-),女,博士生,主要从事植物资源化学研究.
  • 基金资助:

    国家自然科学基金资助项目(30430550) ;广东省自然科学基金资助项目( 05103548) ;华南理工大学优秀博士学位论文创新基金

Synthesis and Characterization of Cationic Sugarcane Bagasse Hemicelluloses

Ren Jun-li  Sun Run-cang  Liu Chuan-fu  Zhang Ai-ping  He Bei-hai  Lin Lu   

  1. State Key Laboratory of Pulp and Paper Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-03-27 Online:2007-04-25 Published:2007-04-25
  • Contact: 任俊莉(1978-),女,博士生,主要从事植物资源化学研究. E-mail:waterlilyjinan@126.com
  • About author:任俊莉(1978-),女,博士生,主要从事植物资源化学研究.
  • Supported by:

    国家自然科学基金资助项目(30430550) ;广东省自然科学基金资助项目( 05103548) ;华南理工大学优秀博士学位论文创新基金

摘要: 以从原渣中提取的半纤维素为原料、3- 氯-2-羟丙基三甲基氯化接为阳离子试剂、乙醇/水为反应介质,通过季接化反应制备了阳离子蔗渣半纤维素聚合物.通过改变反应条件合成了一系列水溶性好、取代度在0.002 -0.02 之间的阳离子半纤维素.采用傅立叶红外光谱和13C 核磁共振表征了改性半纤维素的结构,并利用凝胶渗透色谱检测了改性前后半纤维素的相对分子质量,发现改性后半纤维素的相对分子质量有所降低.最后利用同步热分析仪测定了改性前后半纤维素的热稳定性,发现改性后半纤维素的热稳定性下降.

关键词: 蔗渣, 半纤维素, 季铵化反应, 合成, 表征

Abstract:

A kind of cationic polymer was synthesized by means of quaternization , with sugarcane bagasse hemicel-luloses as the raw material , 3-chloro-2-hydroxypropyltrimthylammonium chloride as the cationic reagent and etha-noVwater mixture as the reaction system. By optimizing the synthesizing conditions , a series of soluble cationic hemicelluloses with the degree of substitution from 0. 002 to 0. 02 were prepared. The structure of the modified hemicelluloses was then examined by means of FT -IR and 13 CNMR , and the relative molecular masses of the hemi-celluloses before and after the modification were measured by means of GPC , revealing a decreased relative molecu-lar mass after the modification. The thermal stabilities of the hemicelluloses before and after the modification were finally studied by using a simultaneous thermal analyzer. The results show that the thermal stability of the modified hemicelluloses decreases.

Key words: sugarcane bagasse, hemicellulose, quaternization, synthesis, characterization