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Title: Influence of particle size on the thermoresponsive and rheological properties of aqueous poly(N-isopropylacrylamide) colloidal suspensions
Authors: Misra, Chandeshwar
Behera, Sanjay Kumar
Bandyopadhyay, Ranjini
Keywords: Thermoresponsivity
swelling ratio
crosslinking density
Issue Date: Dec-2020
Publisher: Indian Academy of Sciences, Bangalore, India.
Citation: Bulletin of Materials Science, 2020, Vol. 4, p53-73.
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 olydispersities and the thermoresponsivity 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 of PNIPAM 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.
Description: Open Access.
ISSN: 0250-4707
Alternative Location:
Copyright: 2020, Indian Academy of Sciences, Bangalore, India.
Appears in Collections:Research Papers (SCM)

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