黄竹生长过程中纤维形态与结构的演变过程研究

Study on the Evolution Process of Fiber Morphology and Structure in the Growth Process of Dendrocalamus Membranaceus Munro

本研究以黄竹为实验原料,借助场发射扫描电子显微镜、二维广角X射线衍射仪等对其生长过程中竹纤维形态、结构的演变过程以及纤维物理性能进行了研究。结果表明,竹龄相同时,黄竹笋期基部的分化发育早于上部;随竹龄增大,前10月细胞壁增厚明显,竹龄3月时壁腔比为0.10,36月时为4.03;随着细胞壁逐渐增厚,纤维由柔软、易弯曲变得硬挺。通过场发射扫描电子显微镜观察,纤维由扁平状逐渐变为多棱柱或近似圆柱体;黄竹纤维的纤维平均长度、平均宽度增大;同一竹龄黄竹纤维的微纤丝角从近竹青至近竹黄逐渐增大,随黄竹径向高度的增大呈现波动趋势,整体在9°~14°范围内,纤维取向良好。

In this study,the morphology,structure evolution and physical properties of Dendrocalamus Membranaceus Munro fibers during the growth process were studied by field emission scanning electron microscopy and two-dimensional wide-angle X-ray diffractometer.The re‐sults showed that when the bamboo age was same,the differentiation and development of the base of bamboo shoots was earlier than that of the upper part.With the increase of bamboo age,the cell wall thickess increased obviously in the first 10 months,and the wall cavity ratio was 0.10 and 4.03 at bamboo age of 3 and 36 months.As the cell wall thickess gradually increased,the fiber became stiff from soft and easy to bend.Observing by field emission scanning electron microscopy,the fiber gradually changed from a flat shape to a multi-prism or an approximate cylinder;the average fiber length and the average width of bamboo fiber increased.At the same bamboo age,the microfibril an‐gle of the fiber gradually increased from the part near the green skin to the part near the inner wall of the bamboo ring,and fluctuated with the increase of the radial height.In the microfibril angle range of 9°~14°,the fiber orientation was good.