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在层次结构的混合材料中纳米尺度的纤维素排序使用扫描电子衍射揭示了

Mathias Nero¹, Hasan Ali^1,2, Yuanyuan Li³

¹Department of Materials and Environmental Chemistry, Stockholm University, Stockholm, SE-106 91, Sweden.

|December 10, 2023

概括

扫描电子衍射 (SED) 揭示了木材中纤维素纤维的纳米尺度方向. 这项技术绘制了纤维素纳米纤维的层次安排,这对于先进的生物复合材料至关重要.

科学领域:

材料科学材料科学材料科学
生物材料科学生物材料科学
聚合物科学聚合物科学

背景情况:

纤维素是一种可再生的生物聚合物,在混合材料中具有显著的潜力.
了解纤维素纳米纤维的排列是提高材料性能的关键.
木细胞结构为等级生物复合材料提供了一个模型.

研究的目的:

展示扫描电子衍射 (SED) 作为绘制纳米纤维素纤维方向的方法.
量化分析木细胞结构内纤维素纤维的布置.
构建一个3D模型的纤维素纳米纤维对齐.

主要方法:

利用扫描电子衍射 (SED) 进行纳米分析.
在具有保留木细胞结构的生物复合材料中检查了纤维素纤维的方向.
量化在平面中的纤维旋转和方向梯度.

主要成果:

实现了纳米级分辨率 (≈15 nm) 用于纤维素排序.
在二次细胞壁中观察到高度组织的纤维素纤维,具有方向梯度.
在中叶叶片附近的量化均纤维取向和横截面的分层结构.

结论:

SED提供了对纤维素纳米纤维的纳米尺度层次安排的独特见解.
该研究提供了细胞壁中复杂的螺旋纤维对齐的3D模型.
这些发现有助于进一步研究基于纤维素的混合材料.

关键词:

在4D-STEM中,纤维素纳米纤维是一种纤维素纳米纤维.复合材料是一种复合材料.层次结构是指层次结构的结构.扫描电子衍射扫描电子衍射

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