Transitional Properties of Cotton Fibers from Cellulose I to Cellulose II Structure
Transitional Properties of Cotton Fibers from Cellulose I to Cellulose II Structure
复制标题
棉纤维从纤维素 I 到纤维素 II 结构的过渡性能
DOI：
10.15376/biores.8.4.6460-6471
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发表时间：
2013-10
期刊：
影响因子：
1.5
通讯作者：
Qinglin Wu
中科院分区：
文献类型：
--
作者：
Yiying Yue;Guangping Han;Qinglin Wu
以天然棉织物为原料，采用不同浓度的NaOH溶液处理，制备丝光纤维。当碱浓度大于10wt%时，丝光处理导致棉纤维的晶体结构从纤维素I转变为纤维素II。此外，丝光处理后的棉纤维转变为溶胀和粗糙的状态。傅立叶变换红外光谱和广角X射线衍射分析结果表明，丝光过程中纤维素分子结构发生了变化（O-H伸缩振动无序度增加，结晶度指数下降）。热重分析确定，纤维素II纤维比纤维素I纤维更热稳定。纤维素纤维增强聚氧化乙烯（PEO）复合材料的力学性能表明，无论是原棉纤维和丝光棉纤维提高了PEO基体的拉伸强度。这些性能直接促成了丝光纺织品的优势（例如，更高的光泽，更多的染料，更有效地吸收汗液，以及在不同洗涤条件下更坚韧）。
Mercerized fibers were prepared from native cotton fabrics via NaOH solution treatment at different concentrations. Mercerization led to transformation of the crystal structure of cotton fibers from cellulose I to II when the NaOH concentration was greater than 10 wt%. In addition, the cotton fibers were converted into a swollen and rough state after mercerization treatment. The results of Fourier transform infrared spectrometry and wide-angle X-ray diffraction indicated that the cellulose molecular structure changed (e.g. the degree of disorder of O-H stretching vibration increased, while the crystallinity index decreased) in the process of mercerization. Thermogravimetric analysis determined that the cellulose II fibers were more thermally stable than the cellulose I fibers. The mechanical properties of cellulose fiber-reinforced polyethylene oxide (PEO) composites showed that both original and mercerized cotton fibers enhanced the tensile strength of the PEO matrix. These properties directly contributed to the advantages of mercerized textile products (e.g. higher luster, holds more dye, more effectively absorbs perspiration, and tougher under different washing conditions).
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