基于三维显微成像的毛竹横截面结构表征

为研究毛竹横截面的结构特征和分布规律,借助X射线三维显微镜对毛竹的维管束和基本组织薄壁细胞结构进行研究,分析了维管束长短轴、面积、体积分数和薄壁细胞面积的分布规律。结果表明:毛竹横截面由外到内,其维管束长轴逐渐减小,短轴逐渐增大,最后长短轴趋于一致,维管束面积逐渐增大,体积分数逐渐减小,相邻维管束中心轴距增大,单个薄壁细胞面积逐渐减小,整体上看毛竹横截面呈现梯度变化规律;受毛竹横截面梯度变化的启发,通过改变纤维和树脂的分布可实现仿生复合材料整体结构的梯度变化,将其应用于仿生复合材料设计中,可开展仿生纤维复合材料研究。

Analysis on cross-sectional structure of moso bamboo using three-dimensional microscope imaging

In order to study the characteristics and distribution of the cross-sectional structure of moso bamboo, X-ray three-dimensional microscope was used to study the vascular bundle and the parenchyma cell structure of the basic tissue of moso bamboo, and the distribution rules of the long and short axis, area, volume fraction and parenchyma cell area of the vascular bundle were analyzed. The results showed that from the outside to the inside of the cross-section of moso bamboo, the vascular bundle long axis gradually decreased, the short axis gradually increased, and finally the long and short axis tended to be the same. After that, the vascular bundle area gradually increased, and the volume fraction gradually decreased. The adjacent center wheelbase increased, and the area of a single parenchyma cell gradually decreased. On the whole, the cross-section of moso bamboo demonstrated a gradient change. Inspired by the gradient change of bamboo cross-section, the gradient change could be applied to the engineering of bionic composites for specific properties. The gradient change of the overall structure of biomimetic composites can be realized by changing the distribution of fiber and resin. When it is applied to the design of biomimetic composites, the research of biomimetic fiber composites can be carried out.