Size of sodium dodecyl sulphate micelles in aqueous NaCl solutions as studied by positron annihilation lifetime spectroscopy

Bockstahl, Frédéric; Pachoud, E.; Duplâtre, G.; Billard, Isabelle

doi:10.1016/s0301-0104(00)00126-9

Cited by 31 publications

(41 citation statements)

References 23 publications

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“…28 1-Chlorobutane (>99%), supplied by Acros, was selected as organic phase model for vinyl chloride monomer (VCM). This model has been used quite extensively by different authors as its characteristics such as density, refractive index and solubility are close to those of VCM, with the advantages of easier handling and of lesser toxicity.…”

Section: Methodsmentioning

confidence: 99%

Effect of poly(vinyl alcohol-co-vinyl acetate) copolymer blockiness on the dynamic interfacial tension and dilational viscoelasticity of polymer–anionic surfactant complex at the water–1-chlorobutane interface

2015

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Poly(vinyl alcohol-co-vinyl acetate) (PVA) copolymers obtained by partial hydrolysis of poly(vinyl acetate) (PVAc) are of practical importance for many applications, including emulsion and suspension polymerization processes. Their molecular characteristics have a major influence on the colloidal and interfacial properties. The most significant characteristics are represented by the average degree of hydrolysis D̅H̅, average degree of polymerization D̅P̅w̅ but also by the average acetate sequence length n(VAc)(0) which designates the so-called blockiness. Colloidal aggregates were observed in the aqueous PVA solutions having a D̅H̅ value of 73 mol%. The volume fraction of these aggregates at a given D̅H̅ value is directly correlated to the blockiness. Three PVA samples with identical D̅H̅ and D̅P̅w̅ but different blockiness were examined. By pendant drop and oscillating pendant drop techniques it was shown that the PVA sample having the lowest blockiness and thus the lowest volume fraction of colloidal aggregates has lower interfacial tension and elastic modulus E' values. On the contrary, the corresponding values are highest for PVA sample of higher blockiness. In the presence of sodium dodecyl sulfate (SDS), the colloidal aggregates are disaggregated by complex formation due to the hydrophobic-hydrophobic interactions. The PVA-SDS complex acts as a partial polyelectrolyte that induces the stretching of the chains and thus a reduction of the interface thickness. In this case, the interfacial tension and the elastic modulus both increase with increasing SDS concentration for all three PVA samples and the most significant effect was noticed for the most "blocky" copolymer sample.

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Section: Methodsmentioning

confidence: 99%

Effect of poly(vinyl alcohol-co-vinyl acetate) copolymer blockiness on the dynamic interfacial tension and dilational viscoelasticity of polymer–anionic surfactant complex at the water–1-chlorobutane interface

2015

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“…The latter is greatly influenced by the counterion effect in ionic micellar solutions [6][7][8][9][10]. The electrolytes additives compensate the head group charge, thereby providing their closer packing.…”

Section: Cp Dls and Conductivity Data In Sds-[h 4 L] 4− -Tba Micellamentioning

confidence: 99%

“…hydrophobic interactions, but the electrostatic repulsion between charged head groups limits the size of ionic micelles. Thus the variation of interactions between counterions and charged groups of micelles modifies the micellar size and shape [6][7][8][9][10], and affects the phase separation phenomena [11][12][13][14][15][16][17][18][19][20]. The phase separation and in particular the CP phenomenon is not usual for ionic micelles due to repulsion of head groups [21,22].…”

Section: Introductionmentioning

confidence: 99%

Counterion effect in SDS–calix[4]resorcinarene micelles

Mustafina

Zakharova

Elistratova

et al. 2009

Journal of Colloid and Interface Science

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“…Тогда при той же площади плоского ДЭС его энергия, как следует из уравнения (25), будет переходить в энергию плоского ДЭС:…”

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Thermodynamic Characteristics of the Surface of Spherical Micelles in Sodium n-Alkylsulphates Solution

Kuznetsov¹,

Усольцева²,

Zherdev³

et al. 2016

Liq. Cryst. and their Appl.

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Size of sodium dodecyl sulphate micelles in aqueous NaCl solutions as studied by positron annihilation lifetime spectroscopy

Cited by 31 publications

References 23 publications

Effect of poly(vinyl alcohol-co-vinyl acetate) copolymer blockiness on the dynamic interfacial tension and dilational viscoelasticity of polymer–anionic surfactant complex at the water–1-chlorobutane interface

Effect of poly(vinyl alcohol-co-vinyl acetate) copolymer blockiness on the dynamic interfacial tension and dilational viscoelasticity of polymer–anionic surfactant complex at the water–1-chlorobutane interface

Counterion effect in SDS–calix[4]resorcinarene micelles

Thermodynamic Characteristics of the Surface of Spherical Micelles in Sodium n-Alkylsulphates Solution

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