...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Spectrochimica acta, Part A. Molecular and biomolecular spectroscopy >Raman spectroscopic investigation of acetylation of raw cotton
【24h】

Raman spectroscopic investigation of acetylation of raw cotton

机译：拉曼光谱研究原棉的乙酰化作用

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Raman spectroscopy has been used to investigate raw cotton acetylation using acetic anhydride/4-dimethylaminopyridine (DMAP) catalyst blend without solvent. The Raman data further confirm successful acetylation as shown by FTIR that was demonstrated previously to be highly sensitive for determining the level of acetylation. However, the Raman peaks are much weaker than the FTIR bands. Nevertheless, the variations of the extent of acetylation estimated from both Raman and FTIR spectra with weight percent gain due to acetylation (WPG) were observed to follow the same pattern. The degrees of acetylation calculated from Raman data were also found to increase linearly with that calculated from the more sensitive FTIR technique. Raman technique is thus suitable for further development as an analytical tool for determining the acetylation level of natural cellulose fibres. Raman data have also shown that the acetylation reaction reduces the crystallinity of cotton. (c) 2005 Elsevier B.V. All rights reserved.
机译：拉曼光谱已用于研究使用无溶剂的乙酸酐/ 4-二甲基氨基吡啶（DMAP）催化剂共混物的原棉乙酰化。拉曼数据进一步证实成功的乙酰化作用，如FTIR所示，先前已证明对确定乙酰化水平高度敏感。但是，拉曼峰比FTIR谱带弱得多。然而，观察到从拉曼光谱和FTIR光谱估计的乙酰化程度随由乙酰化引起的重量百分数增加（WPG）的变化遵循相同的模式。还发现，根据拉曼数据计算得出的乙酰化程度与根据更敏感的FTIR技术计算得出的乙酰化程度呈线性关系。因此，拉曼技术适合作为确定天然纤维素纤维乙酰化水平的分析工具进行进一步开发。拉曼数据还表明，乙酰化反应降低了棉花的结晶度。 （c）2005 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号