Characterization of alkali treated flax fibres by means of FT Raman spectroscopy and environmental scanning electron microscopy
Characterization of alkali treated flax fibres by means of FT Raman spectroscopy and environmental scanning electron microscopy
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DOI：
10.1016/s1386-1425(01)00697-7
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发表时间：
2002-08-01
影响因子：
4.4
通讯作者：
Diepenbrock, W
中科院分区：
文献类型：
--
作者：
Jähn, A;Schröder, MW;Diepenbrock, W
在良好管理的条件下生长的亚麻纤维进行NaOH化学处理，即所谓的丝光处理。纤维素I到纤维素II的多晶型转化发生在纤维纤维素的结晶域内的程度取决于碱浓度。FT拉曼光谱被证明是一个理想的工具，用于检测在体内的亚麻纤维素精细结构的多晶型转变。除了FT拉曼光谱在低于1500 cm（-1）的频率范围内的差异外，CH伸缩振动范围内的光谱的二阶导数也可用于区分两种多晶型变体。伸缩模v（s）COC和v（as）COC的强度比R表示表征亚麻纤维的分子结构的光谱参数。作为一种辅助工具，环境扫描电子显微镜（ESEM）被用来可视化的微观结构的纤维性能取决于碱浓度在丝光。(C)2002 Elsevier Science B. V.保留所有权利。
Flax fibres grown under well managed conditions were submitted to NaOH chemical treatments, so called Mercerization. The extent of the polymorphic transformation of cellulose I into cellulose II taking place within the crystalline domains of the fibre cellulose was dependent on the alkali concentration. FT Raman spectroscopy turned out to represent an ideal tool for detecting the polymorphic transformation of the cellulosic fine structure of the flax fibres in vivo. In addition to the differences of the FT Raman spectra in the frequency range below 1500 cm(-1), second derivatives of the spectra in the range of the CH stretching vibrations could also be used to distinguish the two polymorphic modifications. The intensity ratio R of the stretching modes v(s)COC and v(as)COC represents a spectral parameter characterising the molecular structure of the flax fibres. As a supplementary tool, Environmental scanning electron microscopy (ESEM) was used to visualize the microstructural fibre properties dependent on the alkali concentrations during the Mercerization. (C) 2002 Elsevier Science B.V. All rights reserved.