1. Open Access Kent State
  2. Thermotropic Mesomorphism in Catanionic Surfactants Synthesized from Quaternary Ammonium Surfactants and Sodium Dodecylbenzenesulfonate: Effect of Chain Length and Symmetry
Author(s)
Abstract

Thermotropic properties of catanionic surfactants are influenced by the headgroups as well as hydrocarbon chains. A series of eight catanionic surfactants were synthesized from quaternary ammonium surfactants as the cationic counterpart and dodecylbenzenesulfonate (DBS) as the anionic counterpart and their structures and purities established. Thermal Gravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), Hot-Stage Polarized Light Microscopy (HSPLM), and X-ray Diffraction (XRD) were used to characterize the thermal and liquid crystalline properties of the derived catanionic surfactants. These surfactants form hexagonal columnar (Colh) phase before isotropization. Their phase behavior is rather complex depending on the chain length, symmetry, and number of chains. In all these surfactants, the thermal stability is influenced by the nature of the headgroup. Mesomorphism on the other hand is a result of the interplay between headgroup interactions and chain interactions. In general, formation of mesophases at lower temperature is favored as the number of CH2 groups per molecule is increased.
Format
Article
Identifier(s)
10.1016/j.colsurfa.2014.07.037
Publication Date
2014-07-31
Publication Title
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume
461
First Page
40
Last Page
49
Keywords
Subject
Community
Department of Physics
Permalink https://oaks.kent.edu/phypubs/127
Jose, R., Patel, T., Cather, T., Willhelm, D., Grebowicz, J., Han, H., Bhowmik, P., Sharpnack, L., Agra-Kooijman, D., & Kumar, S. (2014). Thermotropic Mesomorphism in Catanionic Surfactants Synthesized from Quaternary Ammonium Surfactants and Sodium Dodecylbenzenesulfonate: Effect of Chain Length and Symmetry. Colloids and Surfaces A: Physicochemical and Engineering Aspects. https://doi.org/10.1016/j.colsurfa.2014.07.037
Jose, Robin, Tilesh Patel, Troy Cather, Daniel Willhelm, Janusz Grebowicz, Haesook Han, Pradip Bhowmik, Lewis Sharpnack, Dena Agra-Kooijman, and Satyendra Kumar. 2014. “Thermotropic Mesomorphism in Catanionic Surfactants Synthesized from Quaternary Ammonium Surfactants and Sodium Dodecylbenzenesulfonate: Effect of Chain Length and Symmetry”. Colloids and Surfaces A: Physicochemical and Engineering Aspects. https://doi.org/10.1016/j.colsurfa.2014.07.037.
Jose, R., T. Patel, T. Cather, D. Willhelm, J. Grebowicz, H. Han, P. Bhowmik, L. Sharpnack, D. Agra-Kooijman, and S. Kumar. Thermotropic Mesomorphism in Catanionic Surfactants Synthesized from Quaternary Ammonium Surfactants and Sodium Dodecylbenzenesulfonate: Effect of Chain Length and Symmetry. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 31 July 2014, doi:10.1016/j.colsurfa.2014.07.037.