Related Experiment Video
Updated: Jun 19, 2026
09:42
Unraveling Entropic Rate Acceleration Induced by Solvent Dynamics in Membrane Enzymes
Published on: January 16, 2016
Structural and thermal study of mesomorphic dodecylammonium carrageenates
M Vinceković1, A Pustak, Lj Tusek-Bozić
1Department of Chemistry, Faculty of Agronomy, Ruder Bosković Institute, Zagreb, Croatia. mvincekovic@agr.hr
Journal of Colloid and Interface Science
|October 14, 2009
Summary
Dodecylammonium carrageenates exhibit a layered structure due to electrostatic interactions between dodecylammonium chloride and carrageenans. The surfactant dictates structure, while carrageenan influences thermal stability.
Area of Science:
- Materials Science
- Polymer Chemistry
- Supramolecular Chemistry
Background:
- Carrageenans are natural polysaccharides with diverse applications.
- Cationic surfactants can form complexes with charged polymers.
- Understanding these complexes is key for novel material development.
Purpose of the Study:
- To investigate the structural characteristics and thermal stability of dodecylammonium carrageenates.
- To explore the interactions between dodecylammonium chloride and different carrageenan types (kappa-, iota-, lambda-).
- To elucidate the roles of surfactant and polysaccharide in the complex's properties.
Main Methods:
- Stoichiometric complexation of dodecylammonium chloride and carrageenans.
- Infrared (IR) spectral analysis to confirm interactions.
- X-ray diffraction (XRD) experiments to assess structural ordering.
Main Results:
- IR spectroscopy confirmed electrostatic and hydrogen bond interactions.
- XRD revealed increased structural ordering in dodecylammonium carrageenates compared to parent carrageenans.
- A distinct layered structure was observed, with polar carrageenan sublayers and nonpolar dodecylammonium sublayers.
Conclusions:
- Dodecylammonium carrageenates possess a well-defined layered structure.
- Cationic surfactant (dodecylammonium) is the primary determinant of the complex's structure.
- Carrageenan moiety significantly influences the thermal properties of the resulting complexes.
