The rheological properties of konjac glucomannan (KGM) solution

The rheological properties of konjac glucomannan (KGM) solution were measured by HAAKE Rotational Rheometer, and the results indicated that KGM solution began to transform from Newtonian fluid to non-Newtonian fluid above 0.10 wt%, which represented the overlap of molecular chains. When the concentration exceeded 1.00 wt%, the entanglements of molecular chains became obvious, and the KGM sol formed. Furthermore, the rheological formulas of KGM solution were simulated very regularly, and the parameters of viscosity (eta) and non-Newtonian index (n) held the relationship of exponential function to concentration (C), however, the consistency coefficient (kappa) displayed a power function, then their concentration-dependence functions were as follows: eta=-0.33+1.17e(16.80C), n=0.29+039e(-2.56)C, and kappa=29.11C(3.17). Finally, the rheological properties from diluted solution to KGM sol were revealed.