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
(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)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/122069
- author
- Kjellin, U R M ; Reimer, Johan LU and Hansson, P
- organization
- publishing date
- 2003
- 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
- 10.1016/S0021-9797(03)00168-1
- language
- English
- LU publication?
- yes
- id
- 39d57a66-47e0-42eb-bc93-33c55ca5bebc (old id 122069)
- date added to LUP
- 2016-04-01 11:43:35
- date last changed
- 2022-04-20 20:52:22
@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}}, keywords = {{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/10.1016/S0021-9797(03)00168-1}}, doi = {{10.1016/S0021-9797(03)00168-1}}, volume = {{262}}, year = {{2003}}, }