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首页> 外文期刊>Macromolecular Symposia >Changes in the Inter- and Intra- Fibrillar Structure of Lyocell (TENCEL®) Fibers after KOH Treatment†
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Changes in the Inter- and Intra- Fibrillar Structure of Lyocell (TENCEL®) Fibers after KOH Treatment†

机译：KOH处理后Lyocell（TENCEL®）纤维的纤维间和纤维内结构的变化†

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摘要

Lyocell fibers were treated with KOH up to 8 M which was demonstrated to distribute homogeneously at the outer zones of fiber cross section compared to NaOH which accesses more deeply but less homogenously. Both NaOH and KOH solutions can be used to lower significantly the fibrillation of lyocell fibers. However, due to intrafibrillar swelling together with deep penetration ability of alkali seen for NaOH treatments results in great fiber tensile strength loss which is not observed for KOH treatments due to its inability to penetrate the fiber completely. The porous structure of fibers was studied by inverse size exclusion chromatography (ISEC) to identify mean pore diameter, total pore area and accessible pore volume (APV). Mean pore diameter of fibers decreased after KOH treatments which did not change after NaOH treatments. Wide angle X-ray diffraction analyses (WAXD) were applied to identify the crystallinity index and crystallite size. In general, fiber properties such as water retention value, carboxyl content using methylene blue sorption method, depth of color measured after dyeing with C.I. Direct Red 81 and weight loss were distinctly different in the ranges up to 2 M, 2-5 M and 5 to 8 M KOH. KOH treatment suggests new possibilities for the pretreatment of lyocell fibers to lower fibrillation while slightly lowering elongation at break without a distinct loss in tensile strength and with less decrease in carboxyl content and weight loss without changing dyeing properties of fibers compared to NaOH treatment.
机译：莱赛尔纤维用KOH进行了高达8 M的处理，事实证明，与NaOH相比，NaOH可以更均匀地分布在纤维横截面的外部区域。 NaOH和KOH溶液均可用于显着降低莱赛尔纤维的原纤化。但是，由于原纤维内溶胀和碱对NaOH处理的深层渗透能力共同作用，导致纤维的抗拉强度大大降低，而KOH处理由于无法完全渗透纤维而无法观察到。通过逆尺寸排阻色谱法（ISEC）研究了纤维的多孔结构，以鉴定平均孔径，总孔面积和可及孔体积（APV）。 KOH处理后，纤维的平均孔径降低，而NaOH处理后，纤维的平均孔径不变。广角X射线衍射分析（WAXD）用于鉴定结晶度指数和微晶尺寸。通常，纤维性能例如保水值，使用亚甲基蓝吸附法的羧基含量，用C.I染色后测量的颜色深度。直接红81和重量损失在2 M，2-5 M和5至8 M KOH的范围内明显不同。与NaOH处理相比，KOH处理为莱赛尔纤维的预处理提供了新的可能性，以降低原纤维的形成，同时略微降低断裂伸长率，而不会明显降低拉伸强度，并且羧基含量和重量损失的减少较少，而不会改变纤维的染色性能。

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  • 来源
    《Macromolecular Symposia》 |2010年第2期|p.24-37|共14页
  • 作者

    Hale Bahar Öztürk; Mohammad Abu-Rous; Bill MacNaughtan; K. Christian Schuster; John R. Mitchell; Thomas Bechtold;

  • 作者单位

    Christian-Doppler-Laboratory for Textile and Fiber Chemistry in Cellulosics, Research Institute for Textile Chemistry and Textile Physics, University of Innsbruck, Hoechsterstrasse 73, A-6850, Dornbirn – Austria;

    Textile Innovation, Lenzing AG, A-4860, Lenzing - Austria;

    Division of Food Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, LE12 5RD, Loughborough - UK;

    Textile Innovation, Lenzing AG, A-4860, Lenzing - Austria;

    Division of Food Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, LE12 5RD, Loughborough - UK;

    Christian-Doppler-Laboratory for Textile and Fiber Chemistry in Cellulosics, Research Institute for Textile Chemistry and Textile Physics, University of Innsbruck, Hoechsterstrasse 73, A-6850, Dornbirn – Austria;

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  • 正文语种 eng
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  • 关键词

    cellulose; fibers; lyocell; structure; swelling;

    机译：纤维素;纤维;莱赛尔;结构;溶胀;

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