Raman spectroscopic investigation of acetylation of raw cotton
Raman spectroscopic investigation of acetylation of raw cotton
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DOI：
10.1016/j.saa.2005.07.045
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发表时间：
2006-05-15
影响因子：
4.4
通讯作者：
Kokot, S
中科院分区：
文献类型：
--
作者：
Adebajo, MO;Frost, RL;Kokot, S
利用拉曼光谱研究了原棉在无溶剂条件下乙酸酐/4-二甲氨基吡啶（DMAP）共混催化剂的乙酰化反应。拉曼数据进一步证实了成功的乙酰化，如FTIR所示，FTIR先前被证明对于确定乙酰化水平是高度灵敏的。然而，拉曼峰比FTIR带弱得多。然而，从拉曼和FTIR光谱估计的乙酰化程度的变化与由于乙酰化的重量百分比增加（WPG）观察到遵循相同的模式。从拉曼数据计算的乙酰化度也被发现与从更灵敏的FTIR技术计算的乙酰化度线性增加。因此，拉曼技术适合于进一步发展，作为一种分析工具，用于确定天然纤维素纤维的乙酰化水平。拉曼数据还表明乙酰化反应降低了棉的结晶度。(c)2005 Elsevier B. V.保留所有权利。
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.