Attenuated total reflectance Fourier-transform Infrared spectroscopy analysis of crystallinity changes in lyocell following continuous treatment with sodium hydroxide

被引：226
作者：
Siroky, Jan [1 ,2 ]
Blackburn, Richard S. [1 ]
Bechtold, Thomas [2 ]
Taylor, Jim [3 ]
White, Patrick [3 ]
机构：
[1] Univ Leeds, Green Chem Grp, Ctr Tech Text, Leeds LS2 9JT, W Yorkshire, England
[2] Univ Innsbruck, Christian Doppler Lab Text & Fibre Chem Cellulos, Res Inst Text Chem & Text Phys, A-6850 Dornbirn, Austria
[3] Lenzing Aktiengesell, Lenzing Fibers, A-4860 Lenzing, Austria
来源：
CELLULOSE | 2010年 / 17卷 / 01期
关键词：
Swelling; Polysaccharides; Cellulose II; ATR-FTIR; Fibres; REGENERATED CELLULOSIC FIBERS; VISCOSE-TYPE FIBERS; X-RAY-DIFFRACTION; STRUCTURAL CHARACTERISTICS; SPECTRA; POLYSACCHARIDES; MERCERIZATION; INTERMEDIATE; COTTON; IR;
D O I：
10.1007/s10570-009-9378-x
中图分类号：
TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];
学科分类号：
0805 ; 080502 ; 0822 ;
摘要：
Cellulose is a linear 1,4-beta-glucan polymer where the units are able to form highly ordered structures, as a result of extensive interaction through intra- and intermolecular hydrogen bonding of the three hydroxyl groups in each cellulose unit. Alkali has a substantial influence on morphological, molecular and supramolecular properties of cellulose II polymer fibres causing changes in crystallinity. These physical changes were observed herein using ATR-FTIR spectroscopy, following continuous treatment of the cellulose II fabrics with aqueous sodium hydroxide solution under varying condition parameters. Post-treatment, maxima for total crystallinity index and lateral order index, and minima for hydrogen bond intensity, were observed at concentrations of 3.3 and 4.5 mol dm(-3) NaOH, when treated at 25 A degrees C and 40 A degrees C, respectively. Under these treatment conditions, it is proposed that maximum molecular reorganisation occurs in the amorphous and quasi-crystalline phases of the cellulose II polymer.
引用
收藏
页码：103 / 115
页数：13
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