Self-assembly Behaviors of Surfactant and Colloidal Solutions under Flow

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  • 界面活性剤水溶液およびコロイド懸濁液における自己集合と流動ダイナミクス
  • カイメン カッセイザイ スイヨウエキ オヨビ コロイド ケンダクエキ ニ オケル ジコ シュウゴウ ト リュウドウ ダイナミクス

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<p>In recent years, self-assembly of complex fluids has received considerable attention in the fields of nanoscience and nanotechnology. Self-assembly is involved in various functional materials that are widely used in industry and there is a strong relationship between self-assembled structures and specific functions. Hence, the understanding and controlling of the self-assembly controlling of complex fluids is important and a useful process in materials chemistry and engineering. In this paper, the recent developments on studies of the structure formation and flow properties of amphiphilic molecules and Janus colloids in solution, using coarse-grained simulation that takes into account hydrodynamic interactions are reviewed. We first briefly introduce the dissipative particle dynamics method and discuss in detail the self-assembly behavior and viscosity properties of surfactant aqueous solution in nanotubes. Following this, we describe another simulation method in which solvent particles are modeled explicitly as point particles, which is the so-called “the multi-particle collision dynamics (MPCD)". The relation between the structural and rheological properties of Janus colloids in solution, using molecular dynamics simulations coupled to MPCD is reported. In general, the shear viscosity of the dispersion correlates strongly with the size of the aggregates not aggregates shape. These results allow us to determine the dynamic properties solely based on structural information.</p>

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