| 乙醇中碱纤维素的结构变化 |
| |
| 引用本文： | 殷延开,陈玉放,哈成勇.乙醇中碱纤维素的结构变化[J].纤维素科学与技术,2005,13(4):37-41. |
| |
| 作者姓名： | 殷延开 陈玉放 哈成勇 |
| |
| 作者单位： | 中国科学院广州化学研究所,纤维素化学重点实验室,广东,广州,510650 |
| |
| 摘 要： | 在乙醇中,用氢氧化钠对纤维素进行活化处理,借助X-射线、扫描电镜及CP/MAS-13C-NMR等手段研究了纤维素在活化过程中的形态结构变化。X-射线衍射图谱显示,随碱化中碱浓度的提高,纤维素的结晶度逐渐降低,活性逐渐增强,但当碱的浓度超过16%(W)时,结晶度的下降变化缓慢;电镜图片显示:纤维素表面裂痕增加,表面积增大;从CP/MAS-13C-NMR图谱中可以看出原纤维素和经碱处理的纤维素之间的化学位移区别较大,表明纤维素和氢氧化钠之间发生了化学变化,即生成了碱纤维素(Cell-Na)。
|
| 关 键 词： | 乙醇 纤维素 氢氧化钠 |
| 文章编号： | 1004-8405(2005)04-0037-05 |
| 修稿时间： | 2005年4月16日 |
The Structure Transformation of Alkaline Cellulose in Ethanol |
| |
| YIN Yan-kai,CHEN Yu-fang,HA Cheng-yong.The Structure Transformation of Alkaline Cellulose in Ethanol[J].Journal of Cellulose Science and Technology,2005,13(4):37-41. |
| |
| Authors: | YIN Yan-kai CHEN Yu-fang HA Cheng-yong |
| |
| Abstract: | Cellulose was activated with alkali in ethanol and the structure transformation of cellulose in activation was investigated.X-ray diffraction show that the crystal degree of cellulose decreased and the activation of cellulose increased gradually with the enhancement of the alkali concentration in basification.When the concentration overran 16%(W) the crystal degree reduced very slowly.The photos of SEM show that the crack and area of cellulose surface was bigger.The difference of chemistry shift between cellulose and alkaline cellulose was obvious from CP/MAS-13C-NMR.It indicated chemistry reaction occurred between cellulose and alkali and got alkaline cellulose. |
| |
| Keywords: | ethanol cellulose sodium hydroxide |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
