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090			_aB-10133
245	1	0	_aEffect of N-acylation on structure and properties of chitosan fibers
490	0		_vCarbohydrate Polymers, 68(1), p.122-127, 2007
520	3		_aThis 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.
650	1	4	_aCHITOSAN FIBERS
650	1	4	_aN-ACYLATION
650	1	4	_aN-ACYLCHITOSAN FIBERS
650	1	4	_aCARBOXYLIC ANHYDRIDES
650	1	4	_aCHEMICAL STRUCTURE TRANSITION
700	1	2	_aChoi, C.Y.
700	1	2	_aKim, S.B.
700	1	2	_aPak, P.K.
700	1	2	_aYoo, D.I.
700	1	2	_aChung, Y.S.
856	4	0	_uhttps://drive.google.com/file/d/1Freyh4tLOSRwecWM2K3TtVkW9xzuhJRi/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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