Spinning Process of Chitosan Fiber with Low Concentration of Formic Acid Solution and its Characteristics

The wet spinning of chitosan fiber was carried out using 7% chitosan concentration, 4% aqueous formic acid as a solvent for chitosan and 6M of aqueous CaCl2.2H2O as a coagulation system. A better method for preparation of chitosan spinning solution was investigated by studying the effect of reaction time on incubation of spinning solution in open air. The shear viscosity of chitosan solution (22.63 ~ 23.09 Pa.s) was found to be stabilize the spinning of chitosan fiber in this study. The characteristics of different chitosan fibers were determined by FT-IR and 1HNMR spectroscopies, XRD diffraction, scanning electron microscopy and mechanical properties. All the fibers were observed with high tenacity (dTex). The strength of fiber and water retention of chitosan fiber (%) was significantly increased with increasing the incubation time of spinning solution in open air

Fundamentals and Applications of Chitosan

International audienceChitosan is a biopolymer obtained from chitin, one of the most abundant and renewable material on Earth. Chitin is a primary component of cell walls in fungi, the exoskeletons of arthropods, such as crustaceans, e.g. crabs, lobsters and shrimps, and insects, the radulae of molluscs, cephalopod beaks, and the scales of fish and lissamphibians. The discovery of chitin in 1811 is attributed to Henri Braconnot while the history of chitosan dates back to 1859 with the work of Charles Rouget. The name of chitosan was, however, introduced in 1894 by Felix Hoppe-Seyler. Because of its particular macromolecular structure, biocompatibility, biode-gradability and other intrinsic functional properties, chitosan has attracted major scientific and industrial interests from the late 1970s. Chitosan and its derivatives have practical applications in food industry, agriculture, pharmacy, medicine, cos-metology, textile and paper industries, and chemistry. In the last two decades, chito-san has also received much attention in numerous other fields such as dentistry, ophthalmology, biomedicine and bio-imaging, hygiene and personal care, veterinary medicine, packaging industry, agrochemistry, aquaculture, functional textiles and cosmetotextiles, catalysis, chromatography, beverage industry, photography, wastewater treatment and sludge dewatering, and biotechnology. Nutraceuticals and cosmeceuticals are actually growing markets, and therapeutic and biomedical products should be the next markets in the development of chitosan. Chitosan is also the N. Morin-Crini (*) · Laboratoire Chrono-environnement, UMR 6249, UFR Sciences et Techniques