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Influence of Temperature and Shear Rate on Rheological Properties of CTAC/NaSal Aqueous Solution

[ Vol. 12 , Issue. 4 ]

Author(s):

Mingjun Pang* and Chengcheng Xie   Pages 296 - 311 ( 16 )

Abstract:


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.

Keywords:

Surfactant, rheological properties, shear rate, temperature, shear viscosity, cationic surfactant.

Affiliation:

School of Mechanical Engineering, Changzhou University, Changzhou, Jiangsu, School of Mechanical Engineering, Changzhou University, Changzhou, Jiangsu

Graphical Abstract:



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