Rheological Properties of Highly Dilute Viscoelastic Aqueous Detergent Solutions
Highly dilute aqueous solutions containing 0.2–0.3 mmol dm−3 (80–120 p.p.m.) of some cationic detergents show visible elastic recoil at 25ÛC1 although the viscosity of the solutions is as low as 0.9–1.0 mPa s2. Some of the rheological properties of aqueous solutions of one of the detergents (cetyltrimethylammonium salicylate (CTA-Sal)) have been studied3, 4. At concentrations between 0.3 and 1.0 mmol dm−3 CTA-Sal the solutions behave like ordinary Newtonian solutions at suitably low shear rates, whereas at higher shear rates the solutions show rheopectic behaviour as illustrated in fig. 1.4
KeywordsShear Rate Rheological Property High Shear Rate Sodium Salicylate Detergent Solution
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- 2.S. Graysholt, Physico-Chemical Properties of Highly Dilute Aqueous Detergent Solutions showing Viscoelastic Behaviour, in “Physical Chemistry of Surface Active Substances, Proc. VII Intern. Congr. Surface Active Substances, Moscow 1976”, 2: 906 (1978).Google Scholar
- 4.S. Graysholt, Physico-Chemical Properties of Viscoelastic Aqueous Detergent Solutions, in “Polymer Colloids II”, R. Fitch, ed., Plenum, New York (1980).Google Scholar
- 5.F. R. Spinelli and Ch. D. Meier, Measurement of blood viscosity (1), Biorheology, 11: 301 (1974).Google Scholar