Air-Jet Wet-Spinning of Curdlan Using Ionic Liquid
Air-Jet Wet-Spinning of Curdlan Using Ionic Liquid
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DOI：
10.1021/acssuschemeng.1c00488
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发表时间：
2021-03-08
影响因子：
8.4
通讯作者：
Iwata, Tadahisa
中科院分区：
文献类型：
--
作者：
Suzuki, Shiori;Togo, Azusa;Iwata, Tadahisa
由于纺织工业对环境的影响，纺织工业大规模分布石油基合成纤维，对可再生生物质基可生物降解纤维的需求不断增长。可得然胶是一种线性β-1，3-葡聚糖，由于其螺旋晶体结构和独特的物理化学性质，可潜在地转化为具有优异的可持续性和生物降解性的功能纤维。在此，我们展示了一个简单的和绿色的再生可得然纤维的制备和表征的纤维性能，通过机械和结构分析。将离子液体（1-乙基-3-甲基咪唑鎓乙酸盐，[Amm][ OAc]）中的可得然胶（9重量%）在80 ℃的温和条件下依次挤出，在气隙中拉伸，并在水中凝结。所得纤维是透明的，柔软的，并且具有高的吸水能力（接近86%）。通过将拉伸比从1改变到10，再生纤维的分子取向增加，导致增强的韧性（5.2 +/-0.1cN tex（-1）或75 +/-1MPa）和杨氏模量（2.7 +/-0.1GPa）。尽管这些可得兰再生纤维的机械强度与常规纤维素再生纤维的机械强度不可比较，但它们在干燥状态下的格外优异的伸长率（20-50%）是值得注意的，表明它们在与纤维素纤维所需的应用不同的应用中的潜在用途。
Owing to the environmental impact of the textile industry, which distributes petroleum-based synthetic fibers on a large scale, there is a growing demand for renewable biomass-based biodegradable fiber. Curdlan, a linear beta-1,3-glucan, can be potentially converted into a functional fiber with excellent sustainability and biodegradability because of its helical crystalline structure and unique physicochemical properties. Herein, we demonstrate a facile and green preparation of regenerated curdlan fibers and characterize the fiber properties via mechanical and structural analyses. Curdlan (9 wt %) in an ionic liquid (1-ethyl-3-methylimidazolium acetate, [Emim][ OAc]), was sequentially extruded under a mild condition at 80 degrees C, drawn in an air gap, and coagulated in water. The resulting fiber was transparent, soft, and had high water-absorption ability (similar to 86%). By changing the draw ratio from 1 to 10, the molecular orientation of the regenerated fibers increased, resulting in enhanced tenacity (5.2 +/- 0.1 cN tex(-1) or 75 +/- 1 MPa) and Young's moduli (2.7 +/- 0.1 GPa). Although the mechanical strength of these curdlan-regenerated fibers is not comparable to those of conventional cellulose-regenerated fibers, their exceptionally excellent elongation (20-50%) in the dry state is noteworthy, indicating their potential use in different applications from those desired for the cellulose fibers.