Wet spinning to prepare filaments from three cellulose carbonated derivatives: Synthesis, characterization and filament properties

In this article, three kinds of cellulose carbonated derivatives are synthesized by modifying cellulose with alkyl halides (namely bromopropane, benzyl bromide and bromomethyl cyclopropane) in DBU/DMSO/CO2 system. The wet spinnability and filament properties of the obtained cellulose carbonated derivatives are investigated. Through rheological analysis, the solutions of various cellulose carbonated derivative in Newtonian fluid state can show good wet spinnability. Filaments with smooth surface and uniform morphology can be obtained from the solution with viscosity over 0.07Pa•s. The cellulose carbonated derivatives in the filament show similar in tight orderly rows. Among them, the cellulose propyl carbonated derivative filament exhibits the highest mechanical properties and heat resistance. By using of DBU/DMSO/CO2 system, the wet spinning and key control condition of cellulose carbonated derivatives are combined to achieve for the formation of filament with uniform morphology.