Adsorption and micellization behavior of novel gluconamide-type gemini surfactants

Kenichi Sakai, Shin Umezawa, Mamoru Tamura, Yuichiro Takamatsu, Koji Tsuchiya, Kanjiro Torigoe, Takahiro Ohkubo, Tomokazu Yoshimura, Kunio Esumi, Hideki Sakai, Masahiko Abe

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)

Abstract

The adsorption and micellization behavior of novel sugar-based gemini surfactants (N, N-dialkyl-N, N-digluconamide ethylenediamine, Glu(n)-2-Glu(n), where n is the hydrocarbon chain length of 8, 10 and 12) has been studied on the basis of static/dynamic surface tension, fluorescence, dynamic light scattering (DLS) and cryogenic transmission electron microscope (cryo-TEM) data. The static surface tension of the aqueous Glu(n)-2-Glu(n) solutions measured at the critical micelle concentration (cmc) is observed to be significantly lower than that of the corresponding monomeric surfactants. This suggests that the gemini surfactants, newly synthesized in the current study, are able to form a closely packed monolayer film at the air/aqueous solution interface. The greater ability in the molecular association is supported by the remarkably (approximately 100-200 times) lower cmc of the gemini surfactants compared with the corresponding monomeric ones. With a combination of the fluorescence and DLS data, a structural transformation of the Glu(n)-2-Glu(n) micelles is suggested to occur with an increase in the concentration. The cryo-TEM measurements clearly confirm the formation of worm-like micelles of Glu(12)-2-Glu(12) at the concentration well above the cmc.

Original languageEnglish
Pages (from-to)440-448
Number of pages9
JournalJournal of Colloid And Interface Science
Volume318
Issue number2
DOIs
Publication statusPublished - Feb 15 2008
Externally publishedYes

Keywords

  • Adsorption
  • Sugar-based gemini surfactants
  • Surface tension
  • Worm-like micelles

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'Adsorption and micellization behavior of novel gluconamide-type gemini surfactants'. Together they form a unique fingerprint.

Cite this