Comparison between the interactions of the cationic surfactant DODAB with xanthan and galactomannan

Kaminski, G. A. T.; Sierakowski, Maria Rita; Pontarolo, Roberto; Freitas, Rilton Alves de

doi:10.1016/j.carbpol.2014.08.111

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…The mechanism of complex formation has previously been explored for both oppositely charged polyions and oppositely charged polyelectrolytes with surfactants in the dilute surfactant regime, − involving coacervate formation and site-specific ion–ion interactions. A significant number of parameters are at play including polymer molecular weight, charge density, structure, and flexibility coupled with surfactant molecular architecture and micelle charge density; ultimately, the polymer–surfactant charge ratio is a key factor in coacervate formation. − It is evident in all these studies that binding between oppositely charged polymers and surfactants is stronger with higher charge density polymers but separating the relative importance of the many facets of these systems is complex.…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic NMR Characterization of Charged Side Chain Cationic Polyelectrolytes and Their Interaction with the Anionic Surfactant, Sodium Dodecyl Sulfate

et al. 2019

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Oppositely charged polymers and surfactants show a complex phase behavior with large regions of solubility and insolubility dependent on the concentrations of the species present. Here, a series of quaternized hydroxyethyl cellulose (cationic) polymers have been characterized by pulsed-gradient spin−echo NMR (PGSE-NMR) and electrophoretic NMR (eNMR) in simple aqueous (D 2 O) solutions and in combination with the oppositely charged (anionic) surfactant, sodium dodecyl sulfate (SDS). Analysis of the effective charge on the polymer derived from both the eNMR and PGSE-NMR results yields a readily interpretable insight into the polymer behavior; the effective charge on the polymer at infinite dilution shows a linear relationship with the degree of modification. On addition of low concentrations of SDS, typically C surf < 5 mM, the surfactant interacts with the charged polymers, leading to substantial changes in the dynamics of the system (polymer diffusion, viscosity). At these levels of surfactant addition, there is no macroscopic phase separation. Further, with the absence of an interaction with the parent, the uncharged polymer strongly suggests that the SDS only interacts with the charged moieties present on the functionalized side groups and not the polymer backbone. Ultimately, the charge on the soluble polymer/ surfactant complex was found to depend linearly on the level of surfactant binding across a series of polymers with differing levels of modification with the charge becoming effectively zero at the macroscopic phase separation boundary.

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Section: Introductionmentioning

confidence: 99%

Electrophoretic NMR Characterization of Charged Side Chain Cationic Polyelectrolytes and Their Interaction with the Anionic Surfactant, Sodium Dodecyl Sulfate

et al. 2019

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“…Great effort has been made to better understand the effects of the surfactant architecture and additives on the properties of cationic surfactant vesicles (Carmona-Ribeiro, 1992;Nascimento et al, 1998;Šegota and Težak, 2006). DODAB and DODAC aqueous dispersions have been widely investigated from aspects including the preparation method (Feitosa et al, 2000) and the effects of cosurfactants (Alves and Feitosa, 2008b), polymers (Kaminski et al, 2015), or inorganic salts (Feitosa and Barreleiro, 2004;Nascimento et al, 1998). The effects of the counterion on the bilayer structure, however, still deserve further attention.…”

Section: Introductionmentioning

confidence: 99%

Mixed Cationic Surfactant Vesicles in (Dioctadecyldimethylammonium Bromide)/NaCl and (Dioctadecyldimethylammonium Chloride)/NaBr Aqueous Dispersions

Feitosa

Lemos

Adati

2019

J Surfact & Detergents

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One of the most challenging characteristics not fully understood yet of the cationic surfactant salt dioctadecyldimethylammonium (DODA+) halide is concerned with the effects of the counterion (usually Br− and Cl−) on the surfactant assembly into vesicle structures in aqueous solution. These counterions play a key role in the self‐organization of DODA+ into bilayer structures. Differential scanning calorimetry (DSC) and dynamic light scattering (DLS) techniques were used here to investigate systematically the effects of the single salts NaCl and NaBr, respectively, on the thermal behavior and structural organization of the cationic dioctadecyldimethylammonium bromide and chloride (DODAB and DODAC) in water. The results undoubtedly indicate that the added Br− or Cl−, respectively, into DODAC and DODAB aqueous dispersions, replaces partially the bound counterions (Cl− and Br−) from the vesicles, yielding formation of DODAB/DODAC mixed vesicles. As a conclusion, single salts may be used to tune the thermal and structural characteristics of cationic vesicles.

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Chemical structure and physical-chemical properties of mucilage from the leaves of Pereskia aculeata

et al. 2017

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Comparison between the interactions of the cationic surfactant DODAB with xanthan and galactomannan

Cited by 7 publications

References 24 publications

Electrophoretic NMR Characterization of Charged Side Chain Cationic Polyelectrolytes and Their Interaction with the Anionic Surfactant, Sodium Dodecyl Sulfate

Electrophoretic NMR Characterization of Charged Side Chain Cationic Polyelectrolytes and Their Interaction with the Anionic Surfactant, Sodium Dodecyl Sulfate

Mixed Cationic Surfactant Vesicles in (Dioctadecyldimethylammonium Bromide)/NaCl and (Dioctadecyldimethylammonium Chloride)/NaBr Aqueous Dispersions

Chemical structure and physical-chemical properties of mucilage from the leaves of Pereskia aculeata

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