TY  - BOOK
AU  - Choi,C.Y.
AU  - Kim,S.B.
AU  - Pak,P.K.
AU  - Yoo,D.I.
AU  - Chung,Y.S.
TI  - Effect of N-acylation on structure and properties of chitosan fibers
KW  - CHITOSAN FIBERS
KW  - N-ACYLATION
KW  - N-ACYLCHITOSAN FIBERS
KW  - CARBOXYLIC ANHYDRIDES
KW  - CHEMICAL STRUCTURE TRANSITION
N2  - This article described the physico-chemical transition of the chitosan fibers by N-acylation. N-Acyl chitosan fibers were prepared by a host-treatment of chitosan fibers with carboxylic anhydrides (e. q., acetic, propionic, butyric, hexanoic anhydride)in methanol at room temperature. N-Acyl chitosan fibers were analyzed by FT-IR, TGA, DSC, XRD and SEM. N-Acylation with longer hydrocarbon side chain resulted in a higher spatial organization of the chain to the long axis and showed lower moisture retention. The N-acyl chitosan fibers with short acyl chain exhibited gradually lower tensile strength. N-Hexanoyl chitosan fibers showed higher tensile strength than N-acetylated ones. The chemical structure of chitosan fibers was gradually altered from hydrated form (anti-parallel structure)to dehydrated form (parallel structure)with a treatment of carboxylic anhydrides
UR  - https://drive.google.com/file/d/1Freyh4tLOSRwecWM2K3TtVkW9xzuhJRi/view?usp=drivesdk
ER  -