A comparative study of Critical Micelle Concentration (CMC) and Free Energy of Micellization of cationic surfactant and anionic surfactant in different composition of methanol-water mixed solvent media by conductometric method at 308.15 K

Authors

  • Sujit Kumar Shah Department of Chemistry, Mahendra Morang Adarsh Multiple Campus (Tribhuvan University), Biratnagar
  • Tulsi Prasad Niraula Department of Chemistry, Mahendra Morang Adarsh Multiple Campus (Tribhuvan University), Biratnagar
  • Ajaya Bhattarai Department of Chemistry, Mahendra Morang Adarsh Multiple Campus (Tribhuvan University), Biratnagar
  • Sujit Kumar Chattarjee Department of Chemistry, Mahendra Morang Adarsh Multiple Campus (Tribhuvan University), Biratnagar

DOI:

https://doi.org/10.3126/bibechana.v8i0.4883

Keywords:

Critical micelle concentration, methanol-water mixed solvent media, Specific conductivity, Dodecyltrimethylammonium Bromide, Sodiumdodecyl Sulphate

Abstract

Precise measurements on the specific conductivity of cationic surfactant (Dodecyltrimethyl ammonium bromide) and anionic surfactant (Sodium Dodecyl Sulphate) in methanol water mixed solvent media containing 0.1, 0.2 and 0.3 volume fractions of methanol are reported at 308.15 K. Specific conductivities of Dodecyltrimethyl ammonium bromide and Sodium Dodecyl Sulphate increase with increase in concentration and decrease with increase in the volume fractions of methanol.  Critical micelle concentration (cmc) increases with increase in volume fraction of methanol in case of both surfactants. Free energy of micellization (ΔGºm) has been calculated. Increase in cmc with increase in volume fractions of methanol has been explained in terms of breaking of structure of water due to co-solvent effect.

Keywords: Critical micelle concentration; methanol-water mixed solvent media; Specific conductivity; Dodecyltrimethylammonium Bromide; Sodiumdodecyl Sulphate

DOI: http://dx.doi.org/10.3126/bibechana.v8i0.4883  

BIBECHANA 8 (2012) 37-45

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Published

2012-01-15

How to Cite

Shah, S. K., Niraula, T. P., Bhattarai, A., & Chattarjee, S. K. (2012). A comparative study of Critical Micelle Concentration (CMC) and Free Energy of Micellization of cationic surfactant and anionic surfactant in different composition of methanol-water mixed solvent media by conductometric method at 308.15 K. BIBECHANA, 8, 37–45. https://doi.org/10.3126/bibechana.v8i0.4883

Issue

Vol. 8 (2012)

Section

Research Articles

License

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