Adsorption of sodium dodecyl sulfate and sodium dodecyl benzenesulfonate on poly(vinyl chloride) latexes

Vale, Hugo M.; McKenna, Timothy F. L.

doi:10.1016/j.colsurfa.2005.05.061

Cited by 31 publications

(36 citation statements)

References 15 publications

(21 reference statements)

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“…(4) is 4.34 μmol.m −2 , corresponding to an area per SDBS molecule of 38 Å 2 , which is almost the same as that reported by Vale and McKenna [4]. Such finding highlights the impact of the selected adsorption model on the estimated adsorption parameters.…”

Section: Sdbs Adsorption At the Odt-liquid Interfacesupporting

confidence: 76%

“…The estimated maximum surface density of SDBS at the ODT-liquid interface is lower than the value (4.3 μmol.m −2 ) reported by Vale and McKenna [4] for SDBS adsorption at the hydrophobic polyvinyl chloride (PVC) latex particles (the water contact angle with PVC is~87° [30]). The Γ ∞ value of 4.3 μmol.m −2 corresponds to an area per SDBS molecule at the PVC-water interface of 39 Å 2 .…”

Section: Sdbs Adsorption At the Odt-liquid Interfacementioning

confidence: 72%

“…The reported molecular area of SDS on PS is 42 Å 2 . In comparison, Vale and McKenna [4] have reported a molecular area of 28 Å 2 (estimated using Eq. (4)) for SDS adsorption on PVC latex.…”

Section: Sdbs Adsorption At the Odt-liquid Interfacementioning

confidence: 98%

“…Particularly, published studies on sodium dodecylbenzenesulphonate (SDBS) are still limited despite the significant importance of this surfactant in several industrial applications. Most of the limited published studies on SDBS have focused on the adsorption of this surfactant at the air-water [2] and polymer-water [3,4] interfaces in the absence of co-and counter-ions. Since industrial surfactant systems usually contain electrolytes at controlled pH [5], the interfacial behaviour of SDBS in the presence of co-and counter-ions is of great industrial relevance.…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of an anionic surfactant at air-liquid and different solid-liquid interfaces from solutions containing high counter-ion concentration

2015

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The self-assembly (adsorption) of the anionic surfactant, sodium dodecylbenzenesulphonate (SDBS), at airliquid and different (octadecanethiol, β-mercaptoethanol, α-lipoic acid) solid-liquid interfaces from aqueous solutions containing high concentrations of counter-ion has been investigated. SDBS adsorption at the solid-liquid interfaces was obtained using surface plasmon resonance (SPR) while its adsorption at the air-liquid interface was extracted from surface tension measurements. The results have demonstrated that SDBS packing at the air-liquid interface is similar to its packing at the hydrophobic octadecanethiol-liquid interface. Additionally, SDBS packing at the three solid-liquid interfaces increases with increasing surface hydrophobicity, irrespective whether the surface is neutral or negatively charged. Nonetheless, SDBS adsorption is always within monolayer coverage (no evidence of bilayer or admicelle formation). The results have also revealed that SDBS affinity for the solid-liquid interfaces increases with increasing surface hydrophobicity. Furthermore, SDBS affinity for the air-liquid interface is more than 10-fold its affinity for the solid-liquid interfaces.

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Section: Sdbs Adsorption At the Odt-liquid Interfacesupporting

confidence: 76%

Section: Sdbs Adsorption At the Odt-liquid Interfacementioning

confidence: 72%

Section: Sdbs Adsorption At the Odt-liquid Interfacementioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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Adsorption of an anionic surfactant at air-liquid and different solid-liquid interfaces from solutions containing high counter-ion concentration

2015

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“…Lin et al [3] applied surface tension measurements for the determination of the adsorption isotherm of SDS using unclean PS latex particles. Vale and McKenna [4] reported in detail on the adsorption of SDS and sodium dodecylbenzene sulfonate on polyvinyl chloride latex particles by surface tension measurements. Zwetsloot and Leyte [5] obtained the adsorption isotherm of SDS on PS latex using conductivity measurements by solving the Poisson-Boltzmann equation.…”

Section: Introductionmentioning

confidence: 99%

A New Method for Determination of the Adsorption Isotherm of SDS on Polystyrene Latex Particles Using Conductometric Titrations

et al. 2007

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Monodisperse polystyrene (PS) latex particles were prepared through a conventional batch emulsion polymerization procedure. After cleaning, the latex was subjected to a surfactant titration by sodium dodecyl sulfate (SDS) and the conductivity was monitored. Using the break point in the conductivity-concentration curve, the adsorption area of the surfactant molecules at saturation, A s , was determined as 46 Å 2 per SDS molecule. In order to determine the contribution of the different ionic species to the conductivity, a simple model based on experimental conductivity measurements was developed. The degrees of counterion binding to the micelles and to the surfactant anions adsorbed onto polymer particles were calculated as 0.770 and 0.849, respectively. The Langmuir adsorption isotherm was determined for the adsorption of SDS onto PS latex particles with C ∞ = 7.257 · 10 -10 mol/cm 2 and K = 1.208 · 10 5 cm 3 /mol. IntroductionEmulsion polymerization is an important industrial process for the production of a wide variety of polymers. According to the classical theory of emulsion polymerization, surfactants are responsible for the micellar particle nucleation in the first interval of an ab initio emulsion polymerization. Surfactants also have a crucial role in maintaining the colloidal stability of the latex and in the evolution of the particle size distribution. However, in seeded emulsion polymerizations, e.g., in coreshell systems, the situation is slightly different, because in these systems, it is necessary to use an appropriate amount of surfactant in the reaction recipe to prevent secondary particle nucleation. Therefore, the maximum amount of surfactant used must not exceed the sum of the critical micelle concentration (CMC) and the required amount of surfactant for saturation of the total surface area of the entire particles. In this regard, attention has been paid in the literature to the determination of the adsorption characteristics of surfactants on polymer latex particles, including the adsorption isotherm and adsorption area of surfactant molecules at saturation, A s [1][2][3][4][5][6][7] 1) . Brown and Zhao determined the adsorption isotherm of SDS on clean PS [1] and styrene-butadiene [2] latex particles using surface tension measurements. Lin et al. [3] applied surface tension measurements for the determination of the adsorption isotherm of SDS using unclean PS latex particles. Vale and McKenna [4] reported in detail on the adsorption of SDS and sodium dodecylbenzene sulfonate on polyvinyl chloride latex particles by surface tension measurements. Zwetsloot and Leyte [5] obtained the adsorption isotherm of SDS on PS latex using conductivity measurements by solving the Poisson-Boltzmann equation. Turner et al. [6] have studied the adsorption isotherm of SDS on PS thin films by neutron reflection and attenuated total reflection infrared spectroscopy. Jadir-Reyes et al. [7] have studied the adsorption of different amphiphilic molecules onto PS latex particles by means of a depletion method and spec...

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Role of anionic and nonionic surfactants on the control of particle size and latex colloidal stability in the seeded emulsion polymerization of butyl methacrylate

Castelvetro

Vita

Giannini

et al. 2006

J of Applied Polymer Sci

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The evolution of the main colloidal parameters in the seeded starved-feed semi-continuous emulsion polymerization of butyl methacrylate (BMA) was investigated, with the main purpose of assessing the effectiveness of the semi-empirical relationship S ¼ K Á S S Á DA/A S as a tool to define the surfactant/monomer feed ratio (! K) best suited to achieve a target particle size. In particular, the effect of the type and amount of surfactant [i.e., anionic, sodium dodecyl sulfate (SDS), or nonionic, Brij 58P] added during the semi-continuous stage was considered. Coagulum formation was never observed under the adopted experimental conditions. To detect the occurrence of secondary nucleation or particle aggregation, or both, the particle size and number of particles, the surface tension and the particle surface coverage ratio were correlated. The best results were obtained with SDS and 0.8 K 3. In fact, under the selected experimental conditions, only with SDS did the number of particles remain nearly constant throughout the polymerization at the value defined by the seed latex; the particle size distribution was highly monodisperse, and the final particle diameter closely matched the calculated one ($ 120 nm). The above semi-empirical relationship based on the adjustable parameter K was validated by running test polymerizations aimed at lattices with well-defined particle size.

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Adsorption of sodium dodecyl sulfate and sodium dodecyl benzenesulfonate on poly(vinyl chloride) latexes

Cited by 31 publications

References 15 publications

Adsorption of an anionic surfactant at air-liquid and different solid-liquid interfaces from solutions containing high counter-ion concentration

Adsorption of an anionic surfactant at air-liquid and different solid-liquid interfaces from solutions containing high counter-ion concentration

A New Method for Determination of the Adsorption Isotherm of SDS on Polystyrene Latex Particles Using Conductometric Titrations

Role of anionic and nonionic surfactants on the control of particle size and latex colloidal stability in the seeded emulsion polymerization of butyl methacrylate

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