[섬유] Cross-sectional Distribution of Crystalline and Fibril Orientations of Typical Regenerated Cellulose Fibers in Relation to their Fibrillation Resistance 출판일 : 2009.05.01 저자 : Hitomi Miyamoto, Chihiro Yamane, Mariko Mori, Kunihiko Okajima, Junji Sugiyama 서지사항 : Textile Research Journal, Volume 79, Issue 8, 694페이지 등록일 : 2011.07.20 I 조회수 : 74 작성자 : admin |
The structural distributions and their formation mechanisms, on both the morphological and
crystallographic scales of two types of regenerated cellulose fiber, cuprammonium rayon
(Cupra) and solvent spun rayon (Lyocell), were studied in relation to fibrillar formation using
transmission electron microscopy and electron micro-diffraction analysis. Cupra had a
multilayer structure. The outer layer of the fiber had a network structure without distinct
fibrils, but with high crystallinity (χc) and crystalline orientation (F c), whereas the center of
the fiber had a well-developed fibrillar structure with an amorphous state. The high χc in the
outer layer probably resulted from the release of both copper and ammonia from the fiber
during coagulation. The fibrillar structures in the center could have been formed by the
deformation of the network structure along the elongation direction before crystallization took
place. Lyocell was crystallographically and morphologically uniform along the fiber radius,
with a highly developed fibrillar structure with high χc and F c. The type of fibrillar formation
was closely correlated with the morphological distribution, that is, fibrillation started from
layers with a well-developed fibrillar structure.
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