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Chemical Modification and some Aligned Composites of Chitosan in a Filament State
Author(s) -
Hirano Shigehiro,
Zhang Min,
Yamane Hideki,
Kimura Yoshiharu,
Matsukawa Kojiro,
Nakagawa Masuo
Publication year - 2003
Publication title -
macromolecular bioscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.924
H-Index - 105
eISSN - 1616-5195
pISSN - 1616-5187
DOI - 10.1002/mabi.200350028
Subject(s) - fibroin , protein filament , chitosan , composite material , silk , chitin , composite number , materials science , polymer chemistry , sericin , chemistry , chemical engineering , organic chemistry , engineering
The mono‐filaments (> 10 m in length) of chitosan and the blends of chitosan‐collagen, chitin‐collagen and chitin‐silk fibroin were wet‐spun. The mono‐filaments were chemically N ‐modified with each of n ‐fatty acid anhydrides, intra‐molecular carboxylic anhydrides, fragrant aldehydes and transition metal ions. The mono‐filament was aligned on a straight line with the mono‐filament of silk fibroin or poly(ethylene terephthalate) (PET), and a bundle of one to three mono‐filaments was coated with a medium of sericin (Se), chitosan or N ‐acylchitosan to give rise to novel silk‐mimic filament composites. The filaments coated with a medium of sericin exhibited 26–27 denier for the titer, 2.46–3.36 gf · denier −1 for the tenacity and 11.8–25.0% for the elongation. The apparent density (denier · μm −1 in the filament diameter) of the filament composites was about 3–4 times higher than that of the mono‐filaments. Portion of fragrant aldehydes in Schiff's base was slowly hydrolyzed at room temperature by contacting with atmospheric moisture in the open air, and released from the fragrant filaments and composites. The filament composites coated with a chitosan medium were thrombogenic, and those coated with N ‐acylchitosans were antithrombogenic.An illustrated model for a silk‐mimic filament composite, N 0 (N 2 I‐FI).