. Viscosity data for 2NapFF solutions at pH 10.5 at a concentration of 10 mg/mL (red); 40 mg/mL (blue); 100 mg/mL (black) which have been pre-sheared using the rheometer. Filled circles represent the first viscosity measurement and empty circles represent the second viscosity measurement of the same sample. The geometry was not lifted between the first and second viscosity measurements and samples were left to sit for about two minutes undisturbed between measurements. Error bars represent the standard deviation between measurements, which were carried out in duplicate.