范建云,王 鹏,谢益民*.硫酸盐法蒸煮过程中木素-聚木糖复合体化学结构的变化[J].中国造纸学报,2015,30(1):1-5 本文二维码信息
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硫酸盐法蒸煮过程中木素-聚木糖复合体化学结构的变化
The Change of Chemical Structure of Lignin-xylan Complex in Kraft Pulping
  
DOI:10.11981/j.issn.1000-6842.2015.01.1
中文关键词:  木素-聚木糖复合体  硫酸盐法蒸煮  木素  13C-NMR分析
Key Words:the DHP-xylan complex  kraft pulping  lignin  13C-NMR
基金项目:国家自然科学基金(31370574,31300494);湖北省教育厅青年人才项目(Q20131402);湖北工业大学博士启动金项目(BSQD12037)。
作者单位
范建云 湖北工业大学制浆造纸工程学院,湖北武汉,430068 
王 鹏 湖北工业大学制浆造纸工程学院,湖北武汉,430068湖北工业大学绿色轻工材料湖北省重点实验室,湖北武汉,430068 
谢益民* 湖北工业大学制浆造纸工程学院,湖北武汉,430068湖北工业大学绿色轻工材料湖北省重点实验室,湖北武汉,430068 
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中文摘要:
      以木素脱氢聚合物(DHP)和聚木糖为原料,合成了木素-聚木糖复合体(DHPXC);以该复合体作为植物原料中木素-碳水化合物复合体(LCC)模拟物,对其进行了硫酸盐法蒸煮。对蒸煮后产物进行了红外光谱和高分辨率液体核磁共振分析,探讨了硫酸盐法蒸煮过程中植物纤维原料中LCC的结构变化和降解情况。研究结果表明,木素-聚木糖复合体经硫酸盐法蒸煮后,酸不溶物中含有大量聚木糖,聚木糖与木素依然以LCC的形式连接在一起。蒸煮后木素结构中含有一定量的肉桂醇结构,木素结构单元之间主要通过β-β结构连接,还含有一定量的β-5和β-O-4结构。
Abstract:
      The DHP-xylan complex(DHPXC) was synthesized by using lignin dehydrogenated polymer(DHP) and xylan as raw materials and cooked by kraft pulping method. The infrared spectra and 13C-NMR spectra were used to identify the chemical structure of the obtained complex and its degraded products after kraft pulping. The results indicated that there were a lot of xylan in the acid-insoluble substances. Xylan was linked with lignin by LCC linkage. There were certain amount of structures with double bonds and γ-CH2OH on side chains of lignin after cooking. The β-β was the main linkage between the structural units of residual lignin. There were also some β-5 and β-O-4 structures.
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