Background: It is very important for understanding the turbulence drag-reducing
mechanism and for improving product quality in the fields of pharmaceutical and chemical
engineering to deeply investigate the rheological properties of surfactants solutions.
Methods: The rheological properties of Cationic surfactant (Cetyltrimethyl Ammonium
Chloride)/Sodium salicylate were measured and analyzed with the MCR302 rheometer.
Results: The present results show that the shear viscosity of CTAC/NaSal solution with the
exception of 0.9375mmol·L-1 can show the Newtonian characteristic, the shear-thickening,
the shear-thinning and the stable shear properties with changing shear time. The induction
time increases with a shear rate as a power law function relation tind=aγb.
Conclusion: The shear viscosity of the CTAC/NaSal solution can be divided into three regions
with shear rate, and its flow curve conforms to a linear function in the logarithmic coordinate.
When the concentration and the shear rate are relatively high, the viscosity curve of
the CTAC/NaSal solution appears "platform" at the high temperature. When the shear rate is
greater than 90s-1, the shear viscosity only appears shear thinning with increasing temperature.