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低取代度季铵型半纤维素合成及其结构的研究 被引量:6

Study on Synthesis and Structure of Quaternary Ammonium-type Hemicellulose with Low Degree of Substitution
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摘要 以蔗渣提取的半纤维素为原料,通过醚化反应制备出低取代度季铵型半纤维素。主要讨论了醚化剂3-氯-2-羟丙基三甲基氯化铵(CHMAC)、催化剂NaOH用量对改性产品取代度的影响。当CHMAC与半纤维素的物质的量之比值为1.0、NaOH与CHMAC物质的量之比值为1.2时,得到取代度为0.02的季铵型半纤维素。通过红外、核磁共振光谱表征了改性前后半纤维素的结构。 Quaternary ammonium type hemicellulose with low degree of substitution was synthesized using hemicellulose isolated from sugarcane bagasse as raw material by etherification. The effects of etherifying agent 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (CHMAC) and catalyst NaOH on the degree of substitution of modified product were discussed. When the molar ratio of etherifying agent to hemicellulose is 1.0, and the molar ratio of catalyst to etherifying agent is 1.2, the product of Ds (0.02) was obtained. Structures of the native hemicellulose and modified hemicellulose were examined by FT-IR and ^13C NMR spectroscopies.
出处 《林产化学与工业》 EI CAS CSCD 2007年第3期72-76,共5页 Chemistry and Industry of Forest Products
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资助项目(无编号)
关键词 半纤维素 取代度 结构 hemicelluloses degree of substitution structure
作者简介 任俊莉(1978-),女,山东德州人,博士生,主要从事植物资源化学的研究。
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