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An investigation of dynamic suface tension, critical micelle concentration, and aggregation number of three nonionic surfactants using NMR, time-resolved fluorescence quenching, and maximum bubble pressure tensiometry

Kjellin, U R M; Reimer, Johan LU and Hansson, P (2003) In Journal of Colloid and Interface Science 262(2). p.506-515
Abstract
Several physicochemical properties have been determined for N-dodecyllactobionamide (LABA), maltose 6'-O-dodecanoate (C-12-maltose ester), and tetra(ethylene oxide) dodecyl amide (TEDAd). The increase in the flexibility of the sugar headgroup, enabling more possible molecular conformations, reduces the minimum area/molecule at the liquid-vapor interface obtained at the critical micelle concentration (cmc). The obtained cmc's were 0.35 mM (LABA), 0.3 MM (C12-maltose ester), and 0.5 mM (TEDAd). The monomer diffusion coefficient decreased with the molecular weight and increasing headgroup flexibility of the sugar headgroup, and values were in the range from 3.1 x 10(-10) to 3.6 x 10(-10) m(2)/s. The micelle diffusion coeffici

nts... (More)
Several physicochemical properties have been determined for N-dodecyllactobionamide (LABA), maltose 6'-O-dodecanoate (C-12-maltose ester), and tetra(ethylene oxide) dodecyl amide (TEDAd). The increase in the flexibility of the sugar headgroup, enabling more possible molecular conformations, reduces the minimum area/molecule at the liquid-vapor interface obtained at the critical micelle concentration (cmc). The obtained cmc's were 0.35 mM (LABA), 0.3 MM (C12-maltose ester), and 0.5 mM (TEDAd). The monomer diffusion coefficient decreased with the molecular weight and increasing headgroup flexibility of the sugar headgroup, and values were in the range from 3.1 x 10(-10) to 3.6 x 10(-10) m(2)/s. The micelle diffusion coeffici

nts (0.46 x 10(-10) to 0.68 x 10(-10) m(2)/s) indicated that the TEDAd micelles deviated most from spherical shape. The micelle aggregation numbers determined by time-resolved fluorescence quenching (TRFQ) were estimated to be 120 +/- 10 (LABA), 90 +/- 10 (C-12-maltose ester), and 130 +/- 10 (TEDAd). The dynamic surface tension measurements show that the adsorption of TEDAd onto the liquid-vapor interface at short surface lifetimes is diffusion-limited, whereas an adsorption barrier is present for the sugar surfactants. The analysis of the dynamic surface tension data above the cmc shows that the rate of demicellization is faster for TEDAd than for the two sugar-based surfactants. (C) 2003 Elsevier Science (USA). All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Nonionic surfactant, Sugar surfactant, Amide ethoxylate, Dynamic surface tension, Maximum bubble pressure, NMR self-diffusion, TRFQ
in
Journal of Colloid and Interface Science
volume
262
issue
2
pages
506 - 515
publisher
Elsevier
external identifiers
  • pmid:16256632
  • wos:000183355300022
  • scopus:0038362197
ISSN
1095-7103
DOI
language
English
LU publication?
yes
id
39d57a66-47e0-42eb-bc93-33c55ca5bebc (old id 122069)
date added to LUP
2007-07-11 14:33:09
date last changed
2018-05-29 09:40:18
@article{39d57a66-47e0-42eb-bc93-33c55ca5bebc,
  abstract     = {Several physicochemical properties have been determined for N-dodecyllactobionamide (LABA), maltose 6'-O-dodecanoate (C-12-maltose ester), and tetra(ethylene oxide) dodecyl amide (TEDAd). The increase in the flexibility of the sugar headgroup, enabling more possible molecular conformations, reduces the minimum area/molecule at the liquid-vapor interface obtained at the critical micelle concentration (cmc). The obtained cmc's were 0.35 mM (LABA), 0.3 MM (C12-maltose ester), and 0.5 mM (TEDAd). The monomer diffusion coefficient decreased with the molecular weight and increasing headgroup flexibility of the sugar headgroup, and values were in the range from 3.1 x 10(-10) to 3.6 x 10(-10) m(2)/s. The micelle diffusion coeffici<br/><br>
nts (0.46 x 10(-10) to 0.68 x 10(-10) m(2)/s) indicated that the TEDAd micelles deviated most from spherical shape. The micelle aggregation numbers determined by time-resolved fluorescence quenching (TRFQ) were estimated to be 120 +/- 10 (LABA), 90 +/- 10 (C-12-maltose ester), and 130 +/- 10 (TEDAd). The dynamic surface tension measurements show that the adsorption of TEDAd onto the liquid-vapor interface at short surface lifetimes is diffusion-limited, whereas an adsorption barrier is present for the sugar surfactants. The analysis of the dynamic surface tension data above the cmc shows that the rate of demicellization is faster for TEDAd than for the two sugar-based surfactants. (C) 2003 Elsevier Science (USA). All rights reserved.},
  author       = {Kjellin, U R M and Reimer, Johan and Hansson, P},
  issn         = {1095-7103},
  keyword      = {Nonionic surfactant,Sugar surfactant,Amide ethoxylate,Dynamic surface tension,Maximum bubble pressure,NMR self-diffusion,TRFQ},
  language     = {eng},
  number       = {2},
  pages        = {506--515},
  publisher    = {Elsevier},
  series       = {Journal of Colloid and Interface Science},
  title        = {An investigation of dynamic suface tension, critical micelle concentration, and aggregation number of three nonionic surfactants using NMR, time-resolved fluorescence quenching, and maximum bubble pressure tensiometry},
  url          = {http://dx.doi.org/},
  volume       = {262},
  year         = {2003},
}