Rheology of Wormlike Micelles: Two Universality Classes

O’Shaughnessy, Ben; Yu, Jane

doi:10.1103/physrevlett.74.4329

Cited by 49 publications

(63 citation statements)

References 13 publications

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“…We note that the details of the scission and fusion kinetics are very important for the resulting dynamics and rheology of the micellar solution [36,37]. In real wormlike micelles, before their ends can fuse, there are specific demands on the conformations of the surfactants in the spherical endcaps, giving rise to a considerable free energy barrier E act associated with fusion.…”

Section: Simulation Modelsmentioning

confidence: 99%

“…By increasing this activation barrier, not only the time-scales assocated with scission and fusion increase, but also the physics of the scission-fusion process changes from diffusion limited, where immediate self -fusion predominates, to reaction limited, where fusion is mostly with other chain ends [37]. Since most experimental wormlike micelles belong to the latter class [36], it is important to include such an activation barrier in the model.…”

Section: Simulation Modelsmentioning

confidence: 99%

See 1 more Smart Citation

Ab-initio Coarse-Graining of Entangled Polymer Systems

Padding

Briels

2007

Nanostructured Soft Matter

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Section: Simulation Modelsmentioning

confidence: 99%

Section: Simulation Modelsmentioning

confidence: 99%

Ab-initio Coarse-Graining of Entangled Polymer Systems

Padding

Briels

2007

Nanostructured Soft Matter

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“…• The mean field model in the present context has been questionned [12] because in many applications, there are indications that a newly created chain end often recombines after a short diffusive walk with its original partner. In that case, a possibly large number of breaking events are just not effective and the kinetics proceeds thus differently.…”

Section: A Kinetic Model For Scissions and Recombinationsmentioning

confidence: 99%

“…While building up a molecular scale theory is clearly too heavy for such complex systems, theoretical approaches, based on mean-field concept and non-local phenomenological approaches, can explore with success some equilibrium, and rheological properties [9,10,11], under reasonable but often drastic approximations. Concerning specifically micelle kinetics, recently, O'Shaughnessy and Yu [12] suggested that there are two possible kinds of kinetics associated with scission/recombination: diffusion controlled and mean-field, which may be distinguished by the time dependence of the first recombination times distribution function of the chains.…”

Section: Introductionmentioning

confidence: 99%

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Reaction Kinetics of Coarse-Grained Equilibrium Polymers: A Brownian Dynamics Study

Huang

Crevel

et al.

Computer Simulations in Condensed Matter Systems: From Materials to Chemical Biology Volume 2

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Self-assembled linear structures like giant cylindrical micelles or discotic molecules in solution stacked in flexible columns are systems reminiscent of polydisperse polymer solutions, ranging from dilute to concentrated solutions as the overall monomer density and/or the chain length increases. These supramolecular polymers have an equilibrium length distribution, the result of a competition between the random breakage of chains and the fusion of chains to generate longer ones. This scissionrecombination mechanism is believed to be responsible of some peculiar dynamical properties like the Maxwell fluid rheological character for entangled micelles. Simulations employing simple mesoscopic models provide a powerful approach to test mean-field theories or scaling approaches which have been proposed to rationalize the structural and kinetic properties of these soft matter systems. In the present work, we review the basic theoretical concepts of these "equilibrium polymers" and some of the important results obtained by simulation approaches. We propose a new version of a mesoscopic model in continuous space based on the bead and FENE spring polymer model which is treated by Brownian Dynamics and Monte-Carlo binding/unbinding reversible changes for adjacent monomers in space, characterized by an attempt frequency parameter ω. For a dilute and a moderately semi-dilute state-points which both correspond to dynamically unentangled regimes, the dynamic properties are found to depend upon ω through the effective life time τ b of the average size chain which, in turn, yields the kinetic reaction coefficients of the mean-field kinetic model proposed by Cates. Simple kinetic theories seem to work for times t ≥ τ b while at shorter time, strong dynamical correlation effects are observed. Other dynamical properties like the overall monomer diffusion and the mobility of reactive end-monomers are also investigated.

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Acoustic radiation force optical coherence elastography for evaluating mechanical properties of soft condensed matters and its biological applications

Liu

Kijanka

Urban

2020

Journal of Biophotonics

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Evaluating mechanical properties of biological soft tissues and viscous mucus is challenging because of complicated dynamic behaviors. Soft condensed matter models have been successfully used to explain a number of dynamical behaviors. Here, we reported that optical coherence elastography (OCE) is capable of quantifying mechanical properties of soft condensed matters, micellar fluids. A 7.5 MHz focused transducer was utilized to generate acoustic radiation force exerted on the surface of soft condensed matters in order to produce Rayleigh waves. The waves were recorded by optical coherence tomography (OCT). The Kelvin‐Voigt model was adopted to evaluate shear modulus and loss modulus of soft condensed matters. The results reported that various concentrations of micellar fluids can provide reasonable ranges of elasticity from 65.71 to 428.78 Pa and viscosity from 0.035 to 0.283 Pa·s, which are close to ranges for actual biological samples, like mucus. OCE might be a promising tool to differentiate pathologic mucus samples from healthy cases as advanced applications in the future.

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Rheology of Wormlike Micelles: Two Universality Classes

Cited by 49 publications

References 13 publications

Ab-initio Coarse-Graining of Entangled Polymer Systems

Ab-initio Coarse-Graining of Entangled Polymer Systems

Reaction Kinetics of Coarse-Grained Equilibrium Polymers: A Brownian Dynamics Study

Acoustic radiation force optical coherence elastography for evaluating mechanical properties of soft condensed matters and its biological applications

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