Estimating viscosity and polarity in the microenvironment of polymeric gels—introducing a microviscosity parameter

  • Maneesha Esther Mohanty
  • Ashok Kumar Mishra
Original Paper


Estimation of micropolarity and microfluidity at the water-polymer interface is important in understanding the physicochemical behavior of polymeric gels in the context of their wide biomedical applications. In this work, fluorescence studies of 8-Anilino-1-naphthalene-sulphonate (ANS) were used to introduce a new microviscosity parameter. Z and ET(30) solvent polarity scales were found to work well in resolving the polarity differences in various polyacrylamide gel compositions. A microviscosity parameter τη is an easy-to-estimate parameter that was used to follow the changes in microviscosity with changes in polymer composition. The microviscosity parameter could efficiently estimate the increase of microviscosity with increase in the crosslinker, as well as initiator concentrations at the same monomer concentration.


Microviscosity Micropolarity Fluorescence Polymers Microheterogenous medium 



The authors thank the Department of Biotechnology (DBT), India for all financial support, including the spectrophotometer. M.E.M. thanks the Department of Science and Technology (DST), India for partly supporting the work under the FAST track young scientist scheme.


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Department of ChemistryIndian Institute of Technology MadrasChennaiIndia

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