Kinetics of the Reaction of Cutch (Acacia catechu) with Sodium Sulphite in Tween-80 Micellar Environment

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Authors

  • Chemical and FT NMR Laboratory, Central Leather Research Institute, Adyar, Madras 600 020 ,IN
  • Chemical and FT NMR Laboratory, Central Leather Research Institute, Adyar, Madras 600 020 ,IN

DOI:

https://doi.org/10.18311/jsst/1987/2279

Keywords:

Thermodynamics, Transport Properties, Cutch, Tween-80, Micelles.

Abstract

The rate constants and thermoydnamic activation parameters of the reactions of cutch tannins with Na2SO3 in the presence and absence of Tween-80 micelles were studied. Tween-80 micelles profoundly decelerated the reaction rate with the increase of temperature. High negative entropy of activation in presence of Tween-80 micelles suggest an overall organised transition state. The δ(ΔG*), the free energy difference between the reaction of cutch with Na2SO3 in aqueous environment and in Tween-80 micellar environment became less negative with increase of temperature from 60°C and became positive at 90°C presumably due to the instability of the micelles. The enthalpy entropy compensated each other. Microscopic measurements showed that the bigger size particles of cutch are formed in presence of Tween-80 micelles than in absence. Polvoxyethylated nonionic surfactant micelle is advantageous in solubilization of cutch tannins.

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Published

1987-01-01

How to Cite

Mandal, A. B., & Ramaswamy, D. (1987). Kinetics of the Reaction of Cutch <i>(Acacia catechu)</i> with Sodium Sulphite in Tween-80 Micellar Environment. Journal of Surface Science and Technology, 3(1), 31–38. https://doi.org/10.18311/jsst/1987/2279

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Articles