摘要
通过对木棉纤维残余变形、端口形态,以及不同成分去除前后、回复中空处理后表面形态的观测,对其主体结构、表层结构及物质分布进行了分析总结。研究发现,木棉纤维主体层是由宽为5～20μm的带状单元沿轴向螺旋状绕成的圆管,且该带状单元由纤维素原纤堆砌而成,木质素和半纤维素主要填充在带状单元的螺旋形接缝中。螺旋形接缝是木棉纤维强度和刚度的弱节,受力大时会沿弱节线断裂,受小应力反复作用时会在弱节处形成折痕。木棉纤维很薄的表层是由一定大小的巨原纤沿纤维轴向规整紧密地排列编织而成,并存在一定间距的偏横向环状纹路。
The residual deformation and fracture morphologies of kapok fibers were analyzed, and the surface morphologies of kapok fibers before and after removal of different compositions and reverting of the hollowness were observed. Based on these results, the main body structure, surface structure and material distribution of kapok fiber were summarized. It was found that strip units with width of 5 - 20 μm screw along the axial form the tube-like kapok fiber. The strip units are composed of fibrils （cellulose）, lignin and hemicelluloses mainly fill in the spiral seams between the strip units. The spiral seams are the weak sections of the fiber and form fractures or folds when suffering large force or repeated small forces. Macro- fibrils with a certain size are arranged and woven neatly along the axial to form the thin surface structure of kapok fiber, with partial horizontal rings of a certain width in the surface.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2015年第9期1-6,12,共7页
Journal of Textile Research
关键词
木棉纤维
纵向结构
带状单元
螺旋排列
表层结构
巨原纤
kapok fiber
longitudinal structure
strip unit
screw
surface structure
macro-fibril
