Comparative study of the viscoelastic micellar solutions of R 16 HTAC and CTAC in the presence of sodium salicylate

Rheological Behavior of Environmentally Friendly Viscoelastic Solutions Formed by a Rosin-Based Anionic Surfactant

“…Wormlike micelles are threadlike aggregates formed by the self-assembly of surfactants. − The entanglement of wormlike micelles enhances the viscoelasticity of solutions, the behavior of which is similar to that of polymers. As one of the supramolecular aggregates formed by small molecules, wormlike micelles continuously undergo the scission-recombination process.…”

Effect of Additives on Surfactant Micelle Shape Transformation: Rheology and Molecular Dynamics Studies

“…The dispersed rod-like micelles existed at the concentration value of 25 mmol L –1 at which the shear thinning phenomenon appeared. After the maximum viscosity, the reduction in viscosity with further addition of salts was usually ascribed to branching of the wormlike micellar induced by an increase in the end-cap energy, E c , − or shortening of the mean micelle size. − In general, in cationic surfactant/salt mixture solutions, the micellar branching could take place more easily when the electrostatic interactions were adequately screened because the branching point of micelles represented a delicate balance in the electrostatic property of the solution. The formation of a 3-fold micellar junction was greatly more favorable compared to the end-cap of a micelle .…”

“…Generally, for a system with branching micelles, the plateau modulus G ∞ ′ is independent of the concentration at which the additives are present or increases monotonically with increasing C additives , after the maximum viscosity has been reached . For systems that exhibit a decrease in the mean micellar length, however, this decrease is usually ascribed to a decrease in G ∞ ′ following the maximum peak (we will discuss this phenomenon separately) …”

“…48 For systems that exhibit a decrease in the mean micellar length, however, this decrease is usually ascribed to a decrease in G ∞ ′ following the maximum peak (we will discuss this phenomenon separately). 44 The physical appearance of several typical samples of the R 14 HTAB/2SHNC solutions with different 2SHNC concentrations and the schematic presentation of the micellar In addition, the three mixed systems were compared under same conditions (Figure 3) and, although the change trend of η 0 with increasing C SHNC was the same, i.e., there was only one maximum viscosity in each system, the positions of the extreme values shifted to the direction of lower SHNC concentrations. The absolute maximum value of η 0 was relatively large, indicating a stronger interaction between R 14 HTAB and SHNCs.…”

Imparting pH and temperature dual-responsiveness in a micellar solution of cationic surfactants by introducing a hydrotrope

“…41,42 More importantly, according to our previous work, this surfactant has a low toxicity and better bactericidal ability due to the insertion of a functional group (alkoxyhydroxypropyl) between the polar head group and the hydrophobic chain of cetyltrimethylammonium chloride. 43 Recent experiments have suggested that R 16 HTAB shows good bacteriostatic activity and non-toxicity in human cells (this work is in progress), which can greatly expand its application range in a variety of fields. The effects of concentration, pH, and temperature on the viscoelastic behaviors of the mixed solution were thoroughly examined by rheological measurements.…”