Prior to the grinding process, the initial viscosity of the bleached
carrot residue was measured as 822 mPa. The highest viscosity of
1411 mPa was obtained after just 10 min of processing, showing a
strong gel formation by disintegrated fibrils as is typical of nanocellulose
(Gong et al., 2011). The plateau viscosity of BSG is similar
at 1237 mPa, but the starting value was much lower and the time
taken to reach this was much longer at 150 min. When comparing
these viscosity values to commercial wood pulp, the viscosity plateau at 1275 mPa is reached after 90 min grinding, showing that
this is similar to the BSG material.