LAUSR.org creates dashboard-style pages of related content for over 1.5 million academic articles. Sign Up to like articles & get recommendations!

Effect of scission on alignment of nonionic surfactant micelles under shear flow.

Photo from wikipedia

We investigate the alignment of wormlike micelles under shear flow with dissipative particle dynamics simulations of nonionic surfactant solutions. To reveal the effect of micellar scission on alignment, we evaluate… Click to show full abstract

We investigate the alignment of wormlike micelles under shear flow with dissipative particle dynamics simulations of nonionic surfactant solutions. To reveal the effect of micellar scission on alignment, we evaluate the shear-rate dependence of the mean orientation angle and the average lifetime of micelles for fixed aggregation numbers. Our numerical results demonstrate the presence of two distinct shear-rate regimes of micellar alignment. In the low shear-rate regime, where flow-induced scission does not occur, wormlike micelles align more in the flow direction with the shear rate. In contrast, flow-induced scission suppresses micellar alignment in the high shear-rate regime. In addition, comparing the alignment of wormlike micelles with that of polymers without scission, we find that the mean orientation angle of wormlike micelles is larger than that of polymers when flow-induced scission occurs. This comparison confirms that flow-induced scission yields the unique behavior of micellar alignment. Furthermore, we demonstrate that flow-induced scission suppresses micellar alignment for fixed aggregation numbers by reducing the effective longest relaxation time of micelles.

Keywords: scission; induced scission; alignment; flow induced; shear rate

Journal Title: Soft matter
Year Published: 2023

Link to full text (if available)


Share on Social Media:                               Sign Up to like & get
recommendations!

Related content

More Information              News              Social Media              Video              Recommended



                Click one of the above tabs to view related content.