Intermediate Physical State of Gel And LC In Cellulose Solution And Its Synergetic Effects

Abstract In this study, the physical state of cellulose in solution was analyzed via rheological observations under three different conditions, i.e. steady state, small amplitude oscillatory shear, and large amplitude oscillatory shear conditions. The physical states of the solution were changed from isotropic phase to gel structure via liquid crystalline (LC) phase as the concentration increased. The rheological analysis showed that the solution of 16 wt% was physically gelled at the anisotropic phase. This instantaneous gelation at the LC phase dramatically enhanced the mechanical performance of the film obtained from the solution. The study provides a fundamental strategy for the huge improvement of the mechanical properties of the cellulose fibers or films.