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Electrospinning of Chitosan
Author(s) -
Ohkawa Kousaku,
Cha Dongil,
Kim Hakyong,
Nishida Ayako,
Yamamoto Hiroyuki
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400253
Subject(s) - chitosan , electrospinning , dichloromethane , trifluoroacetic acid , materials science , acetic acid , chemical engineering , cationic polymerization , hydrochloric acid , solvent , formic acid , morphology (biology) , polymer chemistry , chemistry , polymer , composite material , organic chemistry , biology , engineering , metallurgy , genetics
Abstract Summary: An electrospun nonwoven fabric of a cationic polysaccharide, chitosan, was successfully prepared. The present study focuses on the effect of the electrospinning solvent and the chitosan concentration on the morphology of the resulting nonwoven fabrics. The solvents tested were dilute hydrochloric acid, acetic acid, neat formic acid and trifluoroacetic acid. As the chitosan concentration was increased, the morphology of the deposition on the collector changed from spherical beads to interconnected fibrous networks. The addition of dichloromethane to the chitosan‐TFA solution improved the homogeneity of the electrospun chitosan fiber. Under optimized conditions, homogenous (not interconnected) chitosan fibers with a mean diameter of 330 nm were prepared.Effects of the coexisting dichloromethane (MC) in the prespun chitosan‐TFA solution on the morphology of the electrospun chitosan fibers. The volume ratio of TFA:MC was 70:30 (×5 000).