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Chitosan/Konjac Glucomannan blend Antibacterial fibers

Chitosan/Konjac Glucomannan Blend Antibacterial Fibers

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2006年度学术研讨会

作者： LIHONG FAN,HUA ZHENG,YONGMEI XU College of Chemical Engineering, Wuhan University of Technology, Wuhan 430070, China

Chitosan and konjac glucomannan (KGM) blend fibers were prepared by spinning their solution through a viscose-type spinneret into a coagulating bath containing aqueous sodium hydroxide and ethanol. The structure and properties of the blend fibers were studied with the aids of infrared spectra (IR), scanning electron micrography (SEM) and X-ray diffraction (XRD). The structure analysis indicated that there were strong interaction and good miscibility between alginate and gelatin molecular resulted from intermolecular hydrogen bonds. Mechanical properties and water-retention properties were measured. Through controlling blend conditions, blend fibers can obtain better mechanical properties than the pure chitosan fiber. The water-retention values (WRV) of blend fibers increase as the amount of KGM is raised. The fibers treated with alcoholic solution of acetic acid have good antibacterial activity to Staphylococcus aureus.

关键词： chitosan konjac glucomannan blend fibers miscibility mechanical properties water-retention properties

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Biomedical fibers Based on alginate/carboxymethyl chitosan blend

Biomedical Fibers Based on alginate/carboxymethyl chitosan b...

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2006年度学术研讨会

作者： LIHONG FAN,HUA ZHENG College of Chemical Engineering, Wuhan University of Technology, Wuhan 430070, China

Alginate/carboxymethyl chitosan blend fibers, prepared by spinning their mixture solution through a viscose-type spinneret into a coagulating bath containing aqueous CaCl2, were studied for structure and properties with the aid of infrared spectroscopy (IR), X-ray diffraction (XRD) and scanning electron micrography (SEM). The analyses indicated a good miscibility between alginate and carboxymethyl chitosan, because of the strong interaction from the intermolecular hydrogen bonds. The best values of the dry tensile strength and breaking elongation were obtained when carboxymethyl chitosan content was 30wt% and 10wt% respectively. The wet tensile strength and breaking elongation decreased with the increase of carboxymethyl chitosan content. Introduction of CM-chitosan in the blend fiber improved water-retention properties of blend fiber compared to pure alginate fiber. Antibacterial fibers, obtained by treating the fibres with aqueous solution of N-(2-hydroxy)-propyl-3-trimethylammonium chitosan chloride and silver nitrate respectively, exhibited good antibacterial activity to Staphylococcus aureus.

关键词： alginate carboxymethyl chitosan blend fibers miscibility properties

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