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在再生纤维素纤维中纤维素微纤维的多尺度结构

Jiliang Liu¹, Herbert Sixta², Yu Ogawa³

¹European Synchrotron Radiation Facility, ESRF, 38000 Grenoble, France.

Carbohydrate polymers

|November 20, 2023

概括

像Ioncell这样的新的纤维素纤维生产方法可以创造出优质的织纤维. 扫描X射线微分歧揭示了基本纤维的结构差异,解释了Ioncell.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
织工程织工程织工程

背景情况:

基于纤维素的织纤维是通过湿 (例如,Viscose) 或干喷式湿 (例如,Lyocell,Ioncell) 生产的.
这些线方法导致最终纤维的机械性能存在显著差异.
了解这些纤维的纳米结构对于优化其性能至关重要.

研究的目的:

通过扫描X射线微差别 (SXM) 来研究粘性纤维和离子纤维之间的纳米结构差异.
为了将这些结构差异与观察到的机械性能变化相关联,特别是湿强度.

主要方法:

使用扫描X射线微分离 (SXM) 分析纤维素在微纤维和纳米纤维层面的形态和结构排列.
研究的重点是"皮肤核心"形态和纤维中的微纤维和基本纤维的结构.

主要成果:

SXM揭示了再生纤维素纤维中的"皮肤核心"形态.
核心区域的微纤维直径约为100纳米,由基本纤维 (~6 × 2纳米) 组成.
离子纤维表现出具有同质形态的基本纤维,而粘性纤维显示出沿010方向的纤维素分子板的优先堆叠,而离子纤维沿1-10方向.

结论:

与粘性纤维相比,离子细胞纤维具有具有更均的形态和更好的结构规律的基本纤维.
离子纤维纤维中基本纤维的独特结构特征有助于其增强的机械性能.
离子纤维与粘合纤维相比,具有显著优越的湿强度,这是由于其改善的内部结构.

关键词:

纤维素基本纤维素 (CEF) 是一种纤维素.微纤维 (MF) 是一种多孔性多孔性扫描X射线微/纳米衍射 (SXM/N) 进行扫描.制过程制过程制过程

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