Abstract: Cellulose is the optimum option to replace the oil resources, but cellulose can neither dissolve in common solvent nor melt-spin due to the special structure of cellulose, which severely limits the industrial development of these strong polar polymers. Therefore, the number of investigations on high efficient preparation of cellulose fiber with green methods has been rapidly increasing. Based on the new dissolving technology of cellulose in alkali/urea aqueous solution at low temperature which invented by Academician Zhang Lina, the spinning engineering experiments of cellulose has been investigated systemically, including batch process, continuous process and continuous in-situ chemical modification process. The results showed that the strong shear stress of extruder can obviously increase the dissolving efficiency and solubility of cellulose as well as prolong the gelation time of solution, so the continuous and stable spinning of cellulose dopes with high concentration was achieved.

Key words: cellulose, direct-dissolution in alkali∕urea aqueous solution at low temperature, twinscrew, cellulose carbamate