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      https://www.ias.ac.in/article/fulltext/pram/071/05/0997-1002

    • Keywords

       

      Complex fluids; surfactants; colloids.

    • Abstract

       

      Structural parameters of micelles formed by Triton X-100 in the presence of solubilized anthranilic acid at different pH values was investigated using light scattering and small angle neutron scattering. Analysis of the SANS data indicate that micelles are oblate ellipsoidal in nature with little variation in the dimensions, in the investigated pH range (from 0.5 to 6.0). The interaction potential of the micelles shows a minimum closer to the isoelectric point of anthranilic acid. A similar variation is observed in the cloud point of the micelles with pH. The observed variation in the interaction potential with pH of the micellar solution can be explained in terms of the reversal of charge on anthranilic acid due to shift in the acid–base equilibrium. The variation in interaction potential and cloud point with pH is modelled using Coulombic repulsion of charged molecules at the micelle interface.

    • Author Affiliations

       

      Gunjan Verma1 V K Aswal2 S K Kulshreshtha1 C Manohar3 P A Hassan1 Eric W Kaler4

      1. Chemistry Division; Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
      2. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
      3. Department of Chemical Engineering, Indian Institute of Technology, Powai, Mumbai 400 076, India
      4. Department of Chemical Engineering, University of Delaware, Newark, USA
    • Dates

       
  • Pramana – Journal of Physics | News

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