Abstract
A series of novel alkylbetaine zwitterionic gemini surfactants ( ZS C n -2- C n where n represents the hydrocarbon chain length of aliphatic amine, the values of n are 6, 8, 12, 14) were synthesized from cyanuric chloride, aliphatic amine, N,N-dimethylpropane-1,3-diamine and sodium chloroacetate. The chemical structures of the prepared compounds were confirmed by 1H NMR, 13C NMR, ESI-MS, IR spectra and elemental analysis. Their critical micelle concentrations (CMC) in the aqueous solutions were determined by surface-tension and steady-state fluorescence methods at 30 °C. A relationship between a logarithm of CMC and hydrophobic chain length showed a linear decrease upon increasing of chain length and then a departure from linearity at n = 12. The surface-tension measurements of ZS C n -2- C n determined that there is a low CMC, a great efficiency in lowering the surface tension. In addition, adsorption and micellization behavior of ZS C n -2- C n were estimated from pC 20 and the minimum average area per surfactant molecule ( A min ).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
