Study on the Structure of Lignin Separated from Kraft Cooking by Carbon-13 Isotopic Tracer Method

摘要：

In this study,the specifically 13C-enriched lignin precursors,i.e.,coniferin-side chain-α-13C,coniferin-side chain-β-13C,coniferin-side chain-γ-13C,were synthesized and injected into internode cavities of the stalk of growing rice plant (Oryza sativa L.)to obtain 13C-enriched rice stalks.In order to elucidate how the bonds between lignin and carbohydrate were changed in pulping,labeled rice stalks were cooked by kraft method.The obtained kraft lignins were analyzed by 13C-NMR and FT-IR spectroscopy.It was found that β-O-4 units were the main structure of kraft lignin,with minor content of β-β,β-5 and β-1 units.Minor content of benzyl ether bonds and ketal linkage between lignin and carbohydrate were observed.

关键词： lignin kraft cooking carbon-13 isotopic tracer

作者: HAITAO YANG YIMIN XIE YAO LAN

作者单位: Key Lab of Paper Science & Technology of Ministry of Education,Shandong Institute of Light Industry, Food & Bioengineering College,Shandong Institute of Light Industry,Jinan,250353,China

会议类型: 国际会议

会议名称: 第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)

会议地点: 天津

会议语种:英文

页码: 199-201

在线出版日期: 2008-05-14（万方平台首次上网日期，不代表论文的发表时间）