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| 麦草NaOH-AQ法蒸煮中溶出木素结构的变化 | |
| 引用本文： | 袁成强,刘玉,陈嘉川,杨桂花,黄峰. 麦草NaOH-AQ法蒸煮中溶出木素结构的变化[J]. 中国造纸学报, 2008, 23(4) |
| 作者姓名： | 袁成强 刘玉 陈嘉川 杨桂花 黄峰 |
| 作者单位： | 1. 山东轻工业学院制浆造纸科学与技术教育部重点实验室,山东济南,250353 2. 山东轻工业学院制浆造纸科学与技术教育部重点实验室,山东济南,250353;山东大学国家微生物重点实验室,山东济南,250100 3. 山东大学国家微生物重点实验室,山东济南,250100 |
| 摘 要： | 采用酸析-弱酸解两段法对麦草NaOH-AQ蒸煮中溶出木素进行分离和提纯,得到木素试样,通过凝胶渗透色谱分析(GPC),得出木素样品的平均分子质量及分布,分析了木素在溶出过程中分子质量的变化。采用红外光谱(FT-IR)对蒸煮各个阶段中溶出木素的结构进行了分析。经过乙酰化后的木素试样,可以通过磷谱核磁共振(31P-NMR)技术得出木素结构谱图,对木素结构中脂肪羟基、羧基和总酚羟基以及总酚羟基中各酚羟基等功能基团进行定量分析对比,得出了溶出木素在NaOH-AQ法蒸煮过程中的变化规律。 |
| 关 键 词： | 麦草 溶出木素 木素结构 木素分子质量 |
The Structure Changes of Dissolved Lignin from Wheat Straw during Soda-anthraquinone Cooking |
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| YUAN Cheng-qiang,LIU Yu,CHEN Jia-chuan,YANG Gui-hua,HUANG Feng. The Structure Changes of Dissolved Lignin from Wheat Straw during Soda-anthraquinone Cooking[J]. Transactions of China Pulp and Paper, 2008, 23(4) | |
| Authors: | YUAN Cheng-qiang LIU Yu CHEN Jia-chuan YANG Gui-hua HUANG Feng |
| Affiliation: | YUAN Cheng-qiang1,LIU Yu1,2 CHEN Jia-chuan1 YANG Gui-hua1 HUANG Feng2 |
| Abstract: | The acid precipitating method was used to separate the dissolved lignin from the black liquor of wheat straw soda-anthraquinone cooking and the crude lignin was further purified by mild acidic hydrolysis.The changes of molecular weight of the lignin during the cooking were investigated by using GPC.The lignin structures were analyzed by using the infrared spectroscopy.The 31P-NMR spectra of the acetylated were obtained.The contents of aliphatic OH,total phenolic OH,COOH and different phenolic functional groups in the lignin structure were analyzed quantitatively and compared in order to discover the change of lignin structure during the soda-anthraquinone pulping. |
| Keywords: | wheat straw dissolved lignin 31P-NMR lignin structure change lignin molecular weight |
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