Interfacial dilational rheological property and lamella stability of branched alkyl benzene sulfonates solutions

Ma, Bin; Zhang, Lei; Gao, Baoyu; Zhang, Lu; Zhao, Suoqi; Yu, Jiahui

doi:10.1007/s00396-011-2415-y

Cited by 17 publications

(14 citation statements)

References 33 publications

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“…The tendency of the slope of log 3 versus log u with increasing concentration at the airewater interface for silwet408 is shown in Table 1. In the experimental concentration range, the slope increases with silwet408 bulk concentration, which indicates a decrease of elastic contribution to the dilational modulus (Ma et al, 2011). 4.1.2.3.…”

Section: Resultsmentioning

confidence: 91%

“…According to van den Tempel and Lucassen model, an increase of surfactant concentration has two opposite aspects of effects on dilational modulus and dilational elasticity (Ma et al, 2011). On one hand, the molecular exchange between bulk and surface appears to increase with increasing bulk concentration, which decreases the interfacial tension gradients and consequently decreases the dilational modulus and dilational elasticity.…”

Section: Resultsmentioning

confidence: 98%

“…Relaxation processes include molecular rearrangements occurring within the interface, the exchange of the interfacial molecules with the bulk solution, and so on (Ma et al, 2011). The dependence of dilational viscous component on frequency for silwet408 solutions at airewater interface is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of gum arabic on the surface tension and surface dilational rheology of trisiloxane surfactant

Cao¹,

Zhang

Zhang³

et al. 2013

Food Hydrocolloids

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 98%

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Effect of gum arabic on the surface tension and surface dilational rheology of trisiloxane surfactant

Cao¹,

Zhang

Zhang³

et al. 2013

Food Hydrocolloids

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“…Recently, there has been some effort to investigate the role of additional benzene substitution of the ABS surfactants on the adsorption and interfacial properties, in particular the interfacial rheology. − Several dialkyl- and trialkyl-benzenesulfonate surfactants with varying alkyl chain lengths were synthesized and the adsorption properties and interfacial dilational properties at the air–water and oil–water interfaces were measured. In general, they found that increasing the length of the additional alkyl substituent resulted in a lower critical micelle concentration and surface excess concentration, a decrease in the surface tension at the same surfactant concentration, as well as an increase in the interfacial dilational properties.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Properties and Monolayer Collapse of Alkyl Benzenesulfonate Surfactant Monolayers at the Decane–Water Interface from Molecular Dynamics Simulations

et al. 2017

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The molecular structure of a surfactant molecule is known to have a great effect on the interfacial properties and the type of nanostructures formed. In this work, we have performed molecular dynamics simulations on six isomers of an alkyl benzenesulfonate surfactant to investigate the effect of the degree and position of aromatic substitution on the interfacial properties and on the collapse of the surfactant monolayer at a decane-water interface. The surface pressure of the monolayers was shown to increase with increasing surface coverage, until some of the monolayers become mechanically unstable and form large undulations. Shifting the primary alkyl chain of the surfactant from the para to the meta position was found to significantly affect the orientation of the surfactant head groups, while the attachment position of the benzene ring along the primary alkyl chain plays a greater role in the orientation of the surfactant tails. In general, to the extent considered in this work, our results suggest that additional alkyl substitution and meta substitution of the primary alkyl chains increase both the effectiveness and efficiency of the surfactants, and accelerate the onset of monolayer collapse. The interface was found to consist of an inner Helmholtz layer of partially dehydrated counterions in contact with the surfactant head groups, an outer Helmholtz layer of hydrated counterions, and a diffuse layer. The di- and trisubstituted surfactants formed nearly spherical swollen micelles encapsulating pure decane, which effectively solubilizes decane in water as a microemulsion. The monosubstituted surfactants formed elongated buds that protrude from the interface, but did not detach from the monolayer. To our knowledge, the role of aromatic substitution on interfacial properties has not been investigated by molecular simulations previously. The results from this work could provide insights to design improved surfactants by exploiting aromatic substitution to encapsulate material for drug delivery and other applications.

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“…Earlier investigations have mainly focused on traditional surfactants such as SDS [9] and CTAB. [10] Recently, surfactants [11,12] with regular variation of molecular structures have been developed to investigate the relationship between interfacial dilational properties and molecular structure. For instance, a variety of sodium alkyl benzene sulfonate derivatives were synthesized to deliberate the effect of hydrophobic chain length [13,14] and substituent position of side chain [15] on the interfacial rheology of adsorbed film by drop shape analysis method, indicating that for surfactants with the same headgroups a larger number of hydrophobic alkyl chain shows stronger interfacial rheology effects and the change in para-alkyl has significant effects on the nature of adsorbed film than those of ortho-alkyl.…”

Section: Introductionmentioning

confidence: 99%

Dilational Rheology at Air/Water Interface and Molecular Dynamics Simulation Research of Hydroxyl Sulfobetaine Surfactant

Chen

Zhang

Jiang

et al. 2014

Journal of Dispersion Science and Technology

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Color versions of one or more of the figures in the article can be found online at www.tandfonline.com/ldis. interface during the molecules exchange between interface and bulk phase, has been extensively studied in recent years and played a significant role in many research fields, such as foam and emulsion stability. [1,2] In general, interfacial rheology is classified to dilational rheology and shear rheology according to the interface modification under different external mechanical perturbation. Two kinds of interfacial rheology coexisted when the interfacial film was compressed and expanded. The dilational modulus is several orders of magnitude than shear modulus, therefore, the contribution Hydroxyl sulfobetaines with hexadecyl-, octadecyl-hydrophobic chain and an industrial product hydroxyl sulfobetaine were synthesized from analytical-grade and industrial-grade tertiary amine, respectively. The dilational properties and surface tension of the three surfactants at the water-air interface were investigated by drop shape analysis and ring method. The influences of oscillating frequency and bulk concentration on dilational properties were explored. The experimental results show that the dilational module of octadecyl-hydroxyl sulfobetaine was higher than hexadecyl hydroxyl sulfobetaine and the dilational elastic component of the three surfactants were higher than dilational viscous component. Furthermore, the dilational elastic component of mixed surfactant system shows two maxima in a lower concentration than that of single surfactant system. As a result, the surface tension of mixed surfactant system reaches to minimum value in a lower concentration compared with single surfactant system. The simulation results show that the hydrophobic chains in the mixed betaine solution were more curled than in single-component betaine solution ascribed to stronger interaction among different hydrophobic chains, resulting to a more compact interfacial film.

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Interfacial dilational rheological property and lamella stability of branched alkyl benzene sulfonates solutions

Cited by 17 publications

References 33 publications

Effect of gum arabic on the surface tension and surface dilational rheology of trisiloxane surfactant

Effect of gum arabic on the surface tension and surface dilational rheology of trisiloxane surfactant

Interfacial Properties and Monolayer Collapse of Alkyl Benzenesulfonate Surfactant Monolayers at the Decane–Water Interface from Molecular Dynamics Simulations

Dilational Rheology at Air/Water Interface and Molecular Dynamics Simulation Research of Hydroxyl Sulfobetaine Surfactant

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