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Quantification of counterion binding to and its effects on aqueous dispersions of dialkyl cationic surfactants

Lorenz De Neve UGent, Lien Vermeir UGent, Paolo Sabatino UGent, Pieter Saveyn, Quenten Denon UGent, José Martins UGent and Paul Van Der Meeren UGent (2017) COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS. 532. p.458-463
abstract
Dialkyl cationic surfactants, such as dioctadecyl dimethyl ammonium bromide (DODAB) form vesicles upon dispersion in water. In order to study the influence of the surfactant's counterion, the same dialkyl surfactant was prepared with a fluoride counterion (DODAF). Visually, quite transparent dispersions were prepared when fluoride was selected as counterion, whereas more turbid dispersions were obtained using the bromide surfactant. LR-NMR revealed that the permeability of the DODAF dispersions for water was much larger, which indicated that these rather contained uni-or oligolamellar vesicles, whereas the DODAB dispersions were multilamellar. These observations seemed to indicate an increasing degree of surface charge neutralization by the heavier anions, in line with the Hofmeister series, which was indeed confirmed by electrophoretic light scattering measurements. In order to further quantify the surfactant-counterion interaction, HR-NMR diffusometry measurements were performed on dispersions of a dialkyl cationic surfactant with methyl sulphate counterion in deuterated water. The diffusion data showed that the mobility of this organic anion increased when adding different sodium halides, with a stronger effect from fluoride over chloride and bromide to iodide, which clearly indicated the gradual displacement of the methyl sulphate counterion from the vesicular surface by the stronger binding anions.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (proceedingsPaper)
publication status
published
subject
keyword
Vesicles, Counterion binding, NMR, Cationics, VESICULAR DISPERSIONS, FABRIC SOFTENERS, VESICLES, TRANSITIONS, SULFATE, HALIDES, CHAIN, PH
journal title
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Colloid Surf. A-Physicochem. Eng. Asp.
volume
532
pages
458 - 463
conference name
30th Meeting of the European Colloid and Interface Society (ECIS)
conference location
Rome, Italy
conference start
2016-09-04
conference end
2016-09-09
Web of Science type
Article; Proceedings Paper
Web of Science id
000412065600062
ISSN
0927-7757
DOI
10.1016/j.colsurfa.2017.04.031
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
8521085
handle
http://hdl.handle.net/1854/LU-8521085
date created
2017-05-22 13:29:02
date last changed
2017-12-11 09:56:30
@article{8521085,
  abstract     = {Dialkyl cationic surfactants, such as dioctadecyl dimethyl ammonium bromide (DODAB) form vesicles upon dispersion in water. In order to study the influence of the surfactant's counterion, the same dialkyl surfactant was prepared with a fluoride counterion (DODAF). Visually, quite transparent dispersions were prepared when fluoride was selected as counterion, whereas more turbid dispersions were obtained using the bromide surfactant. LR-NMR revealed that the permeability of the DODAF dispersions for water was much larger, which indicated that these rather contained uni-or oligolamellar vesicles, whereas the DODAB dispersions were multilamellar. These observations seemed to indicate an increasing degree of surface charge neutralization by the heavier anions, in line with the Hofmeister series, which was indeed confirmed by electrophoretic light scattering measurements. In order to further quantify the surfactant-counterion interaction, HR-NMR diffusometry measurements were performed on dispersions of a dialkyl cationic surfactant with methyl sulphate counterion in deuterated water. The diffusion data showed that the mobility of this organic anion increased when adding different sodium halides, with a stronger effect from fluoride over chloride and bromide to iodide, which clearly indicated the gradual displacement of the methyl sulphate counterion from the vesicular surface by the stronger binding anions.},
  author       = {De Neve, Lorenz and Vermeir, Lien and Sabatino, Paolo and Saveyn, Pieter and Denon, Quenten and Martins, Jos{\'e} and Van Der Meeren, Paul},
  issn         = {0927-7757},
  journal      = {COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS},
  keyword      = {Vesicles,Counterion binding,NMR,Cationics,VESICULAR DISPERSIONS,FABRIC SOFTENERS,VESICLES,TRANSITIONS,SULFATE,HALIDES,CHAIN,PH},
  language     = {eng},
  location     = {Rome, Italy},
  pages        = {458--463},
  title        = {Quantification of counterion binding to and its effects on aqueous dispersions of dialkyl cationic surfactants},
  url          = {http://dx.doi.org/10.1016/j.colsurfa.2017.04.031},
  volume       = {532},
  year         = {2017},
}

Chicago
De Neve, Lorenz, Lien Vermeir, Paolo Sabatino, Pieter Saveyn, Quenten Denon, José Martins, and Paul Van Der Meeren. 2017. “Quantification of Counterion Binding to and Its Effects on Aqueous Dispersions of Dialkyl Cationic Surfactants.” Colloids and Surfaces A-physicochemical and Engineering Aspects 532: 458–463.
APA
De Neve, Lorenz, Vermeir, L., Sabatino, P., Saveyn, P., Denon, Q., Martins, J., & Van Der Meeren, P. (2017). Quantification of counterion binding to and its effects on aqueous dispersions of dialkyl cationic surfactants. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 532, 458–463. Presented at the 30th Meeting of the European Colloid and Interface Society (ECIS).
Vancouver
1.
De Neve L, Vermeir L, Sabatino P, Saveyn P, Denon Q, Martins J, et al. Quantification of counterion binding to and its effects on aqueous dispersions of dialkyl cationic surfactants. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS. 2017;532:458–63.
MLA
De Neve, Lorenz, Lien Vermeir, Paolo Sabatino, et al. “Quantification of Counterion Binding to and Its Effects on Aqueous Dispersions of Dialkyl Cationic Surfactants.” COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 532 (2017): 458–463. Print.