[섬유] The Fine Structure of the Kapok Fiber 출판일 : 2010.01.01 저자 : Shi Meiwu, Xiao Hong, Yu Weidong 서지사항 : Textile Research Journal, Volume 80, Issue 2, 159페이지 등록일 : 2011.03.24 I 조회수 : 76 작성자 : admin |
The fine structure of kapok fiber was investigated by transmission electron microscopy. The
walls of the fibers contained five layers, observable both in lateral and in longitudinal cross-
sections: the cuticle, S; primary wall, W1; secondary wall, W2; tertiary wall, W3; and inner
skin, IS. W1, with a thickness of about 200 nm, was characterized by an interlaced fibril-like
network. The fine structure of kapok fiber showed that there was an obvious fibril structure.
The fibrils of W2 were arranged at a certain angle to the fiber axis; and those of W3 were
closely packed and aligned parallel to the fiber axis. The thicknesses of W2 and W3 were
the same, about 500 nm. The highest packing density lay in the cuticle, which is the
protective layer of the fiber, while the structures of W1 and W3 were more compact than that
of W2. Fibrils were easily separated from the relatively loose IS, and dispersed in the lumen.
Moreover, there was a transition layer of low-packing density between adjacent layers. The
interactions between the fibrils in the transitional layers were weaker than those in the
individual layers. The sizes of the smallest visible structural units were not the same for the
different walls and the geometric scales were in the range between that of protofibrils and
fibrils. The smallest fibril size was 3.2-5.0 nm, which is near the dimensions of the
protofibrils of the cotton fiber. Some larger fibrils of different sizes were also observed in the
different walls.
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