摘要
合成了一种缩合型木素模型化合物———脱氢二香草醇,并利用红外光谱、核磁共振谱对其进行了分析和确认。在此基础上,模拟硫酸盐法蒸煮过程,将合成的木素模型物和典型的半纤维素组成部分(木聚糖、木糖)进行蒸煮,然后利用酸析沉淀木素、乙酸乙酯抽提的方法将蒸煮后的产物分级,并利用FT-IR1、3C-NMR对分级后的各个部分进行分析,探讨传统硫酸盐法制浆过程中木素-碳水化合物复合体(LCC)的形成机理。
A type of condensed lignin model compound-dehydrodivanillylalcohol was synthesized with a modified method. The technique of FT-IR and ^1H-NMR was used to identify its chemical structure. The synthesized lignin model compound was cooked by kraft process in existence of typical hemicellulose such as xylan and xylose. The products were separated by acidification and ethyl acetate extraction. The infrared spectra analysis and ^13C- NMR were used to identify the LCC formed during kraft cooking. The research indicated that dehydrodivanillylalcohol was very stable during kraft cooking. Most of the undegraded dehydrodivanillylalcohol and newly formed LCC structure presented in acid insoluble residue and ethyl acetate extractive in existence of xylan. Most of the undegraded xylan presented in the acid insoluble residue. No newly formed LCC structure was found in the acid soluble residue and alkali insoluble residue. Most of the undegraded dehydrodivanillylalcohol and newly formed LCC structure presented in ethyl acetate extractive in existence of xylose. No newly formed LCC structure was found in the acid insoluble residue and acid soluble residue.
出处
《中国造纸学报》
EI
CAS
CSCD
2006年第1期5-9,共5页
Transactions of China Pulp and Paper
基金
国家自然科学基金项目(30170756)
国家自然科学基金项目(30471365)
教育部博士点基金(20020561022)
山东省优秀中青年科学家奖励基金(04BS05005)
