Experimental study on rheological and thermophysical properties of seawater with surfactant additive—part I: rheological properties

The rheological properties of seawater with the addition of surfactant additive (cetyltrimethyl ammonium chloride (CTAC)/sodium salicylate (NaSal)) are measured at different temperatures, including shear viscosity and first normal stress difference ( N 1 ). The effects of the temperature, the salts,...

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Bibliographic Details
Published in:Rheologica acta 2018-10, Vol.57 (10), p.619-633
Main Authors: Zheng, Zhi-Ying, Li, Feng-Chen, Wang, Lu, Li, Xiao-Bin, Zhang, Hong-Na, Cai, Wei-Hua, Zheng, Xin
Format: Article
Language:English
Subjects:
Ammonium chloride
Characterization and Evaluation of Materials
Chemistry and Materials Science
Complex Fluids and Microfluidics
Elasticity
Food Science
High temperature
Materials Science
Mechanical Engineering
Original Contribution
Polymer Sciences
Properties (attributes)
Rheological properties
Rheology
Seawater
Shear rate
Shear thickening (liquids)
Shear viscosity
Sodium salicylates
Soft and Granular Matter
Surfactants
Thermophysical properties
Thickening
Viscosity
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Summary:The rheological properties of seawater with the addition of surfactant additive (cetyltrimethyl ammonium chloride (CTAC)/sodium salicylate (NaSal)) are measured at different temperatures, including shear viscosity and first normal stress difference ( N 1 ). The effects of the temperature, the salts, and CTAC/NaSal concentration on the rheological properties of test solutions are investigated, and the corresponding influence mechanisms are analyzed. It shows that the addition of salt can decrease the shear viscosities of the solutions, and also decrease N 1 and even eliminate the sharp augment of N 1 above a certain shear rate. The growing elasticity can be characterized by the increase of the initial shear rate for shear-thickening inception. High temperature can also remove the sharp increase of N 1 with salt. Nevertheless, the increase of CTAC/NaSal concentration can withstand the elimination of the sharp augment of N 1 .
ISSN:0035-4511
1435-1528
DOI:10.1007/s00397-018-1102-z