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Showing 1 to 9 of 9 for “"wormlike micelles"”.
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Understanding self-assembly and flow heterogeneities in poloxamer wormlike micelles
Wormlike micelles (WLMs) are elongated, self-assembled structures formed from amphiphilic molecules in solution. Although the structure of WLMs resembles that of polymers, WLMs are differentiated by their ability to break and recombine at rest and in response to deformations. This unique property …
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Nuclear magnetic resonance and rheo-NMR investigations of wormlike micelles, rheology modifiers, and ion-conducting polymers
… behavior of cetyltrimethylammonium bromide wormlike micelle solutions, which behave as nematic liquid crystals at sufficiently high concentration. Amphiphilic solutions of this type are used in myriad applications, from fracturing fluids in oil fields to personal care products. We …
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Design of Viscoelastic Surfactant-oil-water Structures with the Hydrophilic-lipophilic Difference (HLD) and Net-average Curvature (NAC) Frameworks
… surfactants into viscoelastic structures such as wormlike micelles and liquid crystals is an important aspect in the development of personal care products and nanostructured materials. Central to this is the curvature of the surfactant membrane, which is one of the governing concepts of surfactant …
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Linear and Non-Linear Mechanical Nature of a Living Mammalian Cytoplasm
… for a well-characterized surfactant solution of wormlike micelles, and subsequently employ this novel technique to demonstrate that the cytoplasm of a living cell undergoes strain softening and shear thinning when locally subjected to weakly nonlinear oscillatory deformations.
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Nonlinear rheology of micelles and polymers
… reform reversibly. The best-studied examples are wormlike surfactant micelles. A model for these systems has recently been proposed, based on the concept of a confining 'tube', and leading to a constitutive equation related to that of Doi and Edwards for unbreakable chains. This equation is …
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Oligomeric surfactants as novel type of amphiphiles : structure - property relationships and behaviour with additives
… For these particular compounds, the formed micelles are relatively small and their aggregation number decreases with increasing the degree of oligomerization, increasing spacer length and sterical hindrance. In addition, pseudo-phase diagrams were established for the dimeric surfactants in …
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STRUCTURE, DYNAMICS AND RHEOLOGY OF SURFACTANT MICELLES AND MICELLE-NANOPARTICLE SOLUTIONS: A MOLECULAR DYNAMICS STUDY
<p>Surfactant micelles are widely used in a number of industrial, commercial and household products and processes. Understanding flow-microstructure coupling in micellar systems can benefit applications ranging from targeted drug delivery and detergency to enhanced oil recovery and hydrofracking. …
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Influence of Electrostatic and Intermolecular Interactions on the Solution Behavior and Electrospinning of Functional Nanofibers
… specific cylindrical aggregates of surfactants (wormlike micelles) can be electrospun into microfibers under the proper conditions. Ammonium and phospholipids surfactants as well as organogelators were studied using solution rheology and DLS to determine the effects of micellar structure and …
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Structure-property relationships in polymeric materials via advanced rheological and neutron scattering techniques
… framework with a model system of polymer-like micelles (PLMs), where we unveil a sequence of microscopic events that micelles experience under dynamic shearing across a range of frequencies. The least-aligned state of the PLMs is observed to migrate from the total strain extreme toward zero …