阳离子蔗渣半纤维素的合成及表征  

Synthesis and Characterization of Cationic Sugarcane Bagasse Hemicelluloses

作　　者：任俊莉[1] 孙润仓[1] 刘传富[1] 张爱萍[1] 何北海[1] 林鹿[1] 

机构地区：[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

出　　处：《华南理工大学学报（自然科学版）》2007年第4期86-90,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：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：以从蔗渣中提取的半纤维素为原料、3-氯-2-羟丙基三甲基氯化铵为阳离子试剂、乙醇/水为反应介质,通过季铵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.A kind of cationic polymer was synthesized by means of quaternization, with sugarcane bagasse hemicelluloses as the raw material, 3-chloro-2-hydroxypropyltrimthylammonium chloride as the cationic reagent and ethanol/water 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 ^13CNMR, and the relative molecular masses of the hemicelluloses before and after the modification were measured by means of GPC, revealing a decreased relative molecular 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.

关 键 词：蔗渣 半纤维素 季铵化反应 合成 表征 

分 类 号：O636.13[理学—高分子化学]