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Analysis of Micellar behavior of as Synthesized Sodium itaconate Monoesters with various Hydrophobic chain lengths, in Aqueous media

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Author Affiliations

  • 1Department of physical chemistry, University of Madras, Maraimalai campus, Guindy, Chennai - 600025, INDIA
  • 2Centre for Green Energy Technology, Madanjeet School of Green Energy Technology, Pondicherry University, Puducherry – 605014, INDIA

Res.J.chem.sci., Volume 3, Issue (12), Pages 43-49, December,18 (2013)

Abstract

Polymerizable surfactants belong to the class of n-alkyl itaconate monoesters are synthesized using itaconic anhydride and the n-alkanols, with n from C10 to C16 chain lengths as precursors. The seven homologues of itaconate monoesters(IAn) synthesized are treated with Sodium Hydroxide (NaOH) solution to result in sodium n-alkyl itaconate mono esters which act as anionic surfactants in aqueous medium. The structural characterizations of IAn are carried out using FTIR and 1HNMR measurements. Specific conductance and UV absorbance values are determinedat different concentrations of surfactant and NaOH in aqueous medium. The critical micelle concentration (CMC), the fractional charge per micelle (a) and the standard free energy change of micellisation (δ 0 mic) values are determined for each of the IAn surfactants at 250C. The effect of hydrophobic chain length (Cn) on the micellisation parameters CMC, a, and δG0 mic are depicted using the three dimensional (3D) plots with Cn and NaOH concentration dependences. The CMC values decreased gradually with increase in Cn due to raise in the hydrophobicity of the micelle core, while a values increased up to C14 homologous and further decreased with increase in Cn due to chain folding inside the micelle core. The synthesized polymerizable surfmers could find application in the production of stable functional polymeric nano particles

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