where K and n are the consistency and flow indexes, respectively.
Fitting parameters are listed in Table 2 for the different samples
and temperatures studied. As expected, the consistency index (K)
presents lower values at 125 °C with respect to those found at
25 °C. As previously mentioned, the highest consistency index at
25 °C was achieved by the oleogel based on chemically modified
chitin (CH), and then followed by MC and CP, respectively. Commercial
lubricating greases, LI and CA, present consistency indexes
that are slightly lower than those obtained for the biopolymerbased
formulations. On the other hand, consistency indexes of these model formulations showed intermediate values with
respect to the commercial greases at 125 °C, excepting for the
sample CP, which exhibits lower value than CA. On the other hand,
extremely low values of the flow index were generally obtained
for all samples, which is characteristic of the typical yielding
behaviour shown by these materials.