Micellization and adsorption of a series of fatty amide ethoxylates

Britta M. Folmer; Magnus Nydén; Krister Holmberg

doi:10.1006/jcis.2001.7782

Micellization and adsorption of a series of fatty amide ethoxylates

Britta M. Folmer, Magnus Nydén, Krister Holmberg^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

An in-depth study of the adsorption and micellization behavior of a series of fatty amide ethoxylates is presented. The effect of the amide bond is studied as well as variations in unsaturations in the hydrocarbon chain and in the length of the oxyethylene headgroup. Ellipsometry is used to determine adsorption on a hydrophobic silica plate while ¹H-NMR self-diffusion is used to study micelle size and structure. The amide bond was found to increase the hydrophilicity of the surfactant leading to less-favorable packing at the interface. The micelles formed by these surfactants were more compact, compared to alcohol ethoxylates with the same hydrophobe. Effects of unsaturations on the interfacial packing were not observed. The micelle structure was somewhat affected by the unsaturations due to increased bulkiness of the surfactant hydrophobe.

Original language	English
Pages (from-to)	404-410
Number of pages	7
Journal	Journal of Colloid and Interface Science
Volume	242
Issue number	2
DOIs	https://doi.org/10.1006/jcis.2001.7782
Publication status	Published - 15 Oct 2001
Externally published	Yes

Keywords

H-NMR self-diffusion
Double bonds
Ellipsometry
Fatty acid monoethanolamide ethoxylate
Interfacial adsorption
Micellization
Unsaturations

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10.1006/jcis.2001.7782

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abstract = "An in-depth study of the adsorption and micellization behavior of a series of fatty amide ethoxylates is presented. The effect of the amide bond is studied as well as variations in unsaturations in the hydrocarbon chain and in the length of the oxyethylene headgroup. Ellipsometry is used to determine adsorption on a hydrophobic silica plate while 1H-NMR self-diffusion is used to study micelle size and structure. The amide bond was found to increase the hydrophilicity of the surfactant leading to less-favorable packing at the interface. The micelles formed by these surfactants were more compact, compared to alcohol ethoxylates with the same hydrophobe. Effects of unsaturations on the interfacial packing were not observed. The micelle structure was somewhat affected by the unsaturations due to increased bulkiness of the surfactant hydrophobe.",

keywords = "H-NMR self-diffusion, Double bonds, Ellipsometry, Fatty acid monoethanolamide ethoxylate, Interfacial adsorption, Micellization, Unsaturations",

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AU - Folmer, Britta M.

AU - Nydén, Magnus

AU - Holmberg, Krister

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N2 - An in-depth study of the adsorption and micellization behavior of a series of fatty amide ethoxylates is presented. The effect of the amide bond is studied as well as variations in unsaturations in the hydrocarbon chain and in the length of the oxyethylene headgroup. Ellipsometry is used to determine adsorption on a hydrophobic silica plate while 1H-NMR self-diffusion is used to study micelle size and structure. The amide bond was found to increase the hydrophilicity of the surfactant leading to less-favorable packing at the interface. The micelles formed by these surfactants were more compact, compared to alcohol ethoxylates with the same hydrophobe. Effects of unsaturations on the interfacial packing were not observed. The micelle structure was somewhat affected by the unsaturations due to increased bulkiness of the surfactant hydrophobe.

AB - An in-depth study of the adsorption and micellization behavior of a series of fatty amide ethoxylates is presented. The effect of the amide bond is studied as well as variations in unsaturations in the hydrocarbon chain and in the length of the oxyethylene headgroup. Ellipsometry is used to determine adsorption on a hydrophobic silica plate while 1H-NMR self-diffusion is used to study micelle size and structure. The amide bond was found to increase the hydrophilicity of the surfactant leading to less-favorable packing at the interface. The micelles formed by these surfactants were more compact, compared to alcohol ethoxylates with the same hydrophobe. Effects of unsaturations on the interfacial packing were not observed. The micelle structure was somewhat affected by the unsaturations due to increased bulkiness of the surfactant hydrophobe.

KW - H-NMR self-diffusion

KW - Double bonds

KW - Ellipsometry

KW - Fatty acid monoethanolamide ethoxylate

KW - Interfacial adsorption

KW - Micellization

KW - Unsaturations

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EP - 410

JO - Journal of Colloid and Interface Science

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IS - 2

ER -

Micellization and adsorption of a series of fatty amide ethoxylates

Abstract

Keywords

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