Preparation And Properties Of Ionic Liquid Regenerated Sugarcane Bagasse Cellulose Fibers

Bagasse cellulose is an ideal natural polysaccharide polymer material, whichhas a character of low prices, renewable, good biocompatibility, and also can bedegraded in the natural environment. Ionic liquid was taken to dissolve bagassecellulose in regenerated bagasse cellulose fiber, its process not only green but alsoexpand the application fields of sugar bagasse cellulose, enhance its value-addedproducts.In this thesis, the basic physical and chemical properties of the bagassecellulose was studied; Ionic liquid (1 - allyl-3 - methylimidazolium chloride) wastaken to dissolve bagasse cellulose, and its dissolution process and stability of thesolution was studied, then bagasse cellulose membrane and fibers was made, theproperty and making progress of cellulose mat and fibers was charactered.The results are as follows:Bagasse cellulose has a basic structural unit of cellulose, the XRD diffractionshowed that bagasse is cellulose I type crystals, the degree of crystallinity is53.37%; Bagasse cellulose at a concentration of 2% -5% is completely dissolved ata condition of 80-100℃in iron liquid, and with the dissolution temperature rised,shorten the time of dissolution; The bagasse solution was lightly decreased whenthe solution was treated at a temperature of 100℃during 36 hours;The experiments showed that 2%-5% of the bagasse cellulose ionic liquidsolutions has a good ability into model, the tensile breaking strength of themembrane was with the increase of the concentration of the solution, and the regeneration of bagasse cellulose film showing a good moisture absorption of Asolution, physiological saline and distilled water has; when the membraneconcentration at 3%, its moisture absorption is the lowest, and with the increase ofits concentration increased, its water vapor permeability reduced; The XRDshowed that after bagasse cellulose was dissolved and regenerated，thederivatization of bagasse cellulose did not occur, but the crystal form fromcelluloseⅠinto celluloseⅡ. And its crystallinity from 53.37% dropped to 23.42%.The best conditions for preparation of bagasse cellulose fibers: bagassecellulose concentration at 4.0%, the spinning solution temperature at 70°C, theair gap at 15mm, the coagulation bath concentration at 0, temperature 20°C,drafting multiple at 1.1 times, the strength of the fiber reached 2.17 cN/dtex.By infrared spectroscopy and XRD showed that after the bagasse celluloseregenerated into fibers, there is no degradation occured. But its degree ofcrystallinity dropped at 28.29%. Scanning electron micrographs show that sugarcane bagasse cellulose fiber structure is dense, smooth surface, groove, the fibercross section close to the circular and renewable bagasse cellulose fibers withgood thermal stability.