Micelle growth of cationic gemini surfactants studied by NMR and by time-resoved fluorescence quenching
Artikel i vetenskaplig tidskrift, 2013

The micelle growth of a series of five cationic gemini surfactants has been investigated by time-resolved fluorescence quenching (TRFQ) and by two NMR techniques, line width analysis and diffusometry. The surfactant series was designed such that the effect of a number of variables could be assessed: length of the spacer unit, presence of ester bonds in the tails close to the head groups, and presence of a hydroxyl group in the spacer. For the gemini with long spacer, the micelles remained relatively small in size upon an increase of the concentration. The gemini surfactants with short spacer, on the other hand, showed a considerable micellar growth as the concentration was raised. It is of particular interest that the relatively simple line width analysis of one dimensional H-1 NMR spectra gave qualitatively the same results as the more sophisticated TRFQ and NMR diffusometry techniques.

Micelle size

Micelle shape

NMR diffusometry

Gemini surfactants

Time resolved fluorescence quenching

Esterquats

Författare

Ali Tehrani

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Krister Holmberg

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Magnus Nydén

SuMo Biomaterials

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Lars Nordstierna

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Journal of Colloid and Interface Science

0021-9797 (ISSN)

Vol. 405 145-149

Ämneskategorier

Kemiteknik

Annan kemiteknik

Annan kemi

Styrkeområden

Materialvetenskap

DOI

10.1016/j.jcis.2013.04.050