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      https://www.ias.ac.in/article/fulltext/boms/043/0182

    • Keywords

       

      Thermoresponsivity; swelling ratio; crosslinking density.

    • Abstract

       

      Thermoresponsive poly($N$-isopropylacrylamide) (PNIPAM) particles of different sizes are synthesized by varying the concentration of sodium dodecyl sulphate (SDS) in a one-pot method. The sizes, size polydispersities and thethermoresponsivity of the PNIPAM particles are characterized by using dynamic light scattering and scanning electron microscopy. It is observed that the sizes of these particles decrease with increase in SDS concentration. Swelling ratios ofPNIPAM particles measured from the thermoresponsive curves are observed to increase with decrease in particle size. This observation is understood by minimizing the Helmholtz free energy of the system with respect to the swelling ratio of the particles. Finally, the dynamics of these particles in jammed aqueous suspensions are investigated by performing rheological measurements.

    • Author Affiliations

       

      CHANDESHWAR MISRA1 SANJAY KUMAR BEHERA1 RANJINI BANDYOPADHYAY1

      1. Soft Condensed Matter Group, Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bengaluru 560 080, India
    • Dates

       
  • Bulletin of Materials Science | News

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