| 초록 |
This study reports a straightforward approach to fabricate bacterial cellulose nanofibrils (BCNFs), which have significant potential for rheology modification of complex fluids. For this, we first conducted 2,2,6,6-tetramethylpiperidine-1-oxyl radical mediated oxidation in the aqueous solution. Then, we controlled aspect ratio of BCNFs through mechanical fibrillation process. Induction of tunable electrostatic interaction of BCNFs at various pH condition results in formation of a nanofibrillar crystalline gel phase. Furthermore, the BCNF gel network displays reversible shear thinning in response to applied shear stress. From rheological studies, finally, we demonstrate that the BCNFs controlled aspect ratio of fibrils exhibit strong viscosity enhancement as well as fast reversible sol-gel transition. |
