Polyvinylpyrrolidone-sodium dodecylsulfate complex is a family of pseudo-polyanions with different charge densities: Evidence from capillary electrophoresis, capillary viscosimetry and conductometry

Wu, Yi-nan; Chen, Jie; Fang, Yun; Zhu, Meng

doi:10.1016/j.jcis.2016.06.037

Cited by 12 publications

(3 citation statements)

References 52 publications

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“…Light scattering experiments performed by Minatti et al claimed PVP and SDS aggregates have properties similar to polyelectrolytes, however due to the multiple equilibria that exists between the molecules the system exhibits higher complexity to that of a standard linear polyelectrolyte (72). Furthermore, Wu et al used capillary electrophoresis to present direct evidence that PVP and SDS complexes should be treated as pseudo-polyanions as the apparent electrophoretic mobility of the complex decreases with increasing SDS aggregation (73). This behaviour has also been accounted for in studies observing the force between surfaces in systems containing neutral polymers and anionic surfactants.…”

Section: Introductionmentioning

confidence: 99%

Forces between oil drops in polymer-surfactant systems: Linking direct force measurements to microfluidic observations

Jamieson

Fewkes

Berry

et al. 2019

Journal of Colloid and Interface Science

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Both microfluidics and atomic force microscopy have been used to quantify the forces between oil drops in the presence of complexes formed with anionic surfactant, sodium dodecyl sulphate, and neutral, water soluble polymer, poly(vinylpyrrolidone). Measurement and modelling of the interaction forces between both rigid and deformable surfaces demonstrated that the attraction between the drops is due to depletion forces, whereas the repulsive force is a combination of electrical double layer and steric forces, indicating complexes exist both in the bulk and at the drop interface. We developed a new microfluidic device to first form and then break-up chains of drops, where the drop break-up is sensitive to the underlying surface forces between the drops, not hydrodynamic drainage forces. The interaction behaviour between the force measurements and the microfluidic observations showed a strong correlation, where the observed adhesion between drops in the microfluidics is sensitive to the drop deformation and Laplace pressure. Correlation between the two techniques provides insight into the surface forces between drops in flowing systems. This work opens the possibility of developing high-throughput measurements of adhesive interactions between drops and has the potential utility in the formulation of emulsions.

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Section: Introductionmentioning

confidence: 99%

Forces between oil drops in polymer-surfactant systems: Linking direct force measurements to microfluidic observations

Jamieson

Fewkes

Berry

et al. 2019

Journal of Colloid and Interface Science

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show abstract

“…First, the structure of the PVP–SDS pseudo-polyanion depends on the PVP-bound SDS micelles that were linked with PVP chains through cation bridging association [ 32 , 33 , 34 ]. When PVP-SDS was used as a soft template, the particle sizes and morphologies of the as-synthesized metallic nanoparticles would be affected by the soft template structure [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

“…The AuNFs in Figure 2 B–D were obtained in the c (SDS) range of 2–15 mmol·L −1 that is within the dual-critical concentration range ( c 1 and c 2 ) of SDS in the presence of PVP [ 32 , 33 ]. The AuNFs possessed an average equivalent particle size range of 100–200 nm with rich 16–20 nm protrusion on the particle surface.…”

Section: Resultsmentioning

confidence: 99%

Morphological Effects of Au Nanoparticles on Electrochemical Sensing Platforms for Nitrite Detection

Feng

Fang

et al. 2023

Molecules

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Au nanoparticles were synthesized in a soft template of pseudo-polyanions composed of polyvinylpyrrolidone (PVP) and sodium dodecyl sulfate (SDS) by the in situ reduction of chloroauric acid (HAuCl4) with PVP. The particle sizes and morphologies of the Au nanoparticles were regulated with concentrations of PVP or SDS at room temperature. Distinguished from the Au nanoparticles with various shapes, Au nanoflowers (AuNFs) with rich protrusion on the surface were obtained at the low final concentration of SDS and PVP. The typical AuNF synthesized in the PVP (50 g·L−1)–SDS (5 mmol·L−1)–HAuCl4 (0.25 mmol·L−1) solution exhibited a face-centered cubic structure dominated by a {111} crystal plane with an average equivalent particle size of 197 nm and an average protrusion height of 19 nm. Au nanoparticles with four different shapes, nanodendritic, nanoflower, 2D nanoflower, and nanoplate, were synthesized and used to modify the bare glassy carbon electrode (GCE) to obtain Au/GCEs, which were assigned as AuND/GCE, AuNF/GCE, 2D-AuNF/GCE, and AuNP/GCE, respectively. Electrochemical sensing platforms for nitrite detection were constructed by these Au/GCEs, which presented different detection sensitivity for nitrites. The results of cyclic voltammetry (CV) demonstrated that the AuNF/GCE exhibited the best detection sensitivity for nitrites, and the surface area of the AuNF/GCE was 1.838 times of the bare GCE, providing a linear c(NO2−) detection range of 0.01–5.00 µmol·L−1 with a limit of detection of 0.01 µmol·L−1. In addition, the AuNF/GCE exhibited good reproducibility, stability, and high anti-interference, providing potential for application in electrochemical sensing platforms.

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Capillary electrophoresis investigation on equilibrium between polymer-related and surfactant-related species in aqueous polymer-surfactant solutions

Chen

Fang

et al. 2017

Journal of Chromatography A

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Polyvinylpyrrolidone-sodium dodecylsulfate complex is a family of pseudo-polyanions with different charge densities: Evidence from capillary electrophoresis, capillary viscosimetry and conductometry

Cited by 12 publications

References 52 publications

Forces between oil drops in polymer-surfactant systems: Linking direct force measurements to microfluidic observations

Forces between oil drops in polymer-surfactant systems: Linking direct force measurements to microfluidic observations

Morphological Effects of Au Nanoparticles on Electrochemical Sensing Platforms for Nitrite Detection

Capillary electrophoresis investigation on equilibrium between polymer-related and surfactant-related species in aqueous polymer-surfactant solutions

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