| 二甲基亚砜/N-甲基咪唑体系中木质素和半纤维素改性剥离研究 |
| |
| 引用本文： | 胡克,李小保,叶菊娣,洪建国.二甲基亚砜/N-甲基咪唑体系中木质素和半纤维素改性剥离研究[J].南京林业大学学报(自然科学版),2012(1):101-104. |
| |
| 作者姓名： | 胡克 李小保 叶菊娣 洪建国 |
| |
| 作者单位： | 南京林业大学化学工程学院 |
| |
| 基金项目： | 江苏省高校优势学科建设工程资助项目 |
| |
| 摘 要： | 在二甲基亚砜/N-甲基咪唑(DMSO/NMI)体系中通过乙酰化反应对桑树枝条木质素和半纤维素进行改性剥离,研究了乙酸酐用量、反应时间和溶剂用量对改性剥离效果的影响,并对乙酰化改性剥离机制进行探讨。结果表明,改性剥离较优条件为:乙酰化试剂用量为30 mL,溶剂用量120 mL,反应时间24 h。改性剥离过程显示木质素的改性剥离效果与其乙酰化程度及其衍生物在溶剂中的溶解能力密切相关。析出剥离组分降解较少,有利于后续综合利用;经改性剥离后剩余纤维素的可及度提高。
|
| 关 键 词： | 桑树枝条 木质素 半纤维素 纤维素 乙酰化改性剥离 |
The acetylated modification and stripping of lignin from hemicellulose in DMSO/NMI system |
| |
| HU Ke,LI Xiaobao,YE Judi,HONG Jianguo.The acetylated modification and stripping of lignin from hemicellulose in DMSO/NMI system[J].Journal of Nanjing Forestry University(Natural Sciences ),2012(1):101-104. |
| |
| Authors: | HU Ke LI Xiaobao YE Judi HONG Jianguo |
| |
| Institution: | (College of Chemical Engineering,Nanjing Forestry University,Nanjing 210037,China) |
| |
| Abstract: | In this study lignin and hemicellulose of mulberry tree branch were modified and stripped by acetylization in DMSO/NMI under room temperature.Influence of acetic anhydride dosage,reaction time and solvent dosage on the effect of stripping were studied and its mechanism was also discussed.The results showed that the suitable modification and stripping condition was as follows:acetic anhydride 30 mL,solvent 120 mL,reaction time 24 h.The effect of acetylated modification and stripping of lignin was closely related with acetylating degree and dissolving ability of lignin derivative.The stripped lignin and hemicellulose derivatives degraded slightly.The accessibility of cellulose was improved. |
| |
| Keywords: | mulberry tree branch lignin hemicellulose cellulose acetylated modification and stripping |
| 本文献已被 CNKI 等数据库收录！ |
