Metal-Driven Viscoelastic Wormlike Micelle in Anionic/Zwitterionic Surfactant Systems and Template-Directed Synthesis of Dendritic Silver Nanostructures

Abstract

In this work, metal ion-induced viscoelastic wormlike micelles in anionic/zwitterionic surfactant solutions (sodium dodecylsulfate/tetradecyldimethylammoniumpropanesulfonate, SDS/TPS) are reported. Steady and dynamic rheology and cryogenic transmission electron microscopy (cryo-TEM) are employed to characterize wormlike micelles in the SDS/TPS/Ca(NO(3))(2) system. Moreover, the surfactant mixing ratio and surfactant tail length are varied to reveal the factors that influence wormlike micelle growth and solution viscoelasticity. A series of metal ions such as Na(+), Mg(2+), Zn(2+), and Al(3+) are proven to promote viscoelastic wormlike micelle formation in the SDS/TPS system. The metal-containing wormlike micelles are expected to be good candidates for directing the synthesis of inorganic nanomaterials. In this article, dendritic silver nanostructures have been prepared in the surfactant wormlike micelle by in situ UV irradiation for the first time.

Calcium Ions to Cross-Link Supramolecular Nanofibers to Tune the Elasticity of Hydrogels over Orders of Magnitude

“…Although the subtle structural differences of 1, 2 , and 3 likely affect the exact values of [CaCl 2 ]/[COOH] for the drastic increase of the elasticity, the sudden exponential increase of elasticity indicates that there is a threshold concentration of the calcium ions, at which the critical fraction of the nanofibers crosslink to form the networks of the hydrogels. 48 It's noted that pyromellitamide organogels show the exponential increase of the viscosity with the time, which associated with the mechanism of aggregation mode. 49 Thus, our results might fundamentally differ with the case pyromellitamide organogels.…”

Study of Cationic and Nonionic Mixed Micelles with NaBr and 3,5-Cl₂C₆H₃CO₂Na by Use of Probe Nucleophilic Reaction of Piperidine with Ionized Phenyl Salicylate

“…5a and 5b 42 . The presence of 0.006 M C 16 E 20 in the mixed HDABr-C 16 E 20 micelles gives different results at the same 3,5-Cl 2 C 6 H 3 CO 2 Na .…”

Viscoelastic Surfactants with High Salt Tolerance, Fast‐Dissolving Property, and Ultralow Interfacial Tension for Chemical Flooding in Offshore Oilfields

“…When the concentration of micelles is above the threshold point, those micelles can overlap and entangle to form three‐dimensional network structures, exhibiting remarkable viscoelastic properties. The fascinating properties of the worm‐like micelles render them extremely useful in many applications, for example, as templates for nanomaterial synthesis (Qiao et al, ), carriers for drug release and delivery (Afifi et al, ), clean fracturing fluid for oil production (Lu et al, ; Samuel et al, ), and mobility‐control agents for chemical‐EOR (Azad & Sultan, ; Dai et al, ; Kumar, Awang, Abbas, & Kalwar, ; Lakatos et al, ; Li, Jing, He, Ren, & Wei, ; Li et al, ; Morvan et al, ; Santvoort & Golombok, ; Sultan, Azad, Hussein, & Mahmoud, ; Zhu, Fan, Liu, & Li, ). Morvan et al () found that the surfactant‐based viscoelastic fluid shows superior thickening ability at a low surfactant concentration ( e.g ., 0.5 wt.%), high‐salinity brine, and high temperature.…”