Wetting of aqueous sodium dodecyl sulfate droplets on polydimethylsiloxane surfaces during evaporation

Yang, Xiao-Ye; Li, Guohao; Huang, Xianfu; Yu, Ying-Song

doi:10.1016/j.colsurfa.2022.130342

Cited by 3 publications

(2 citation statements)

References 55 publications

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“…The equilibrium surface tension of surfactant solutions with different concentrations is measured and is shown in Figure 4. The maximum surfactant concentration we adopted is 2.0 mM, lower than the critical micelle concentration (CMC) (8.2 mM) 37 of SDS. Therefore, we do not consider the case where the surfactant forms a colloidal polymer in solution.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Axisymmetric Compression of a Circular Particle Raft Driven by the Diffusion of Surfactant

Yao,

Cao,

Liu

et al. 2024

Langmuir

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Particle rafts are a new kind of soft matter formed by self-organization on the interface, which possesses mechanical properties between fluid and solid, and they have been widely used in many industrial fields. In the present study, the compression experiment of a circular particle raft is first performed, where an SDS (sodium dodecyl sulfate)-coated metal ring is placed around its periphery. When the surfactant diffuses, the particle raft shrinks, and its shrinkage ratio increases with the increase in the surfactant concentration, where the experimental results are consistent with the numerical simulation. Next, the relationship between the initial surface tension difference of SDS and the radius shrinkage of the particle raft is obtained by dimensional analysis. In what follows, the diffusion model is built to quantify the diffusion process of SDS at the liquid–gas interface, and then the analytical concentration solution of the concentration of SDS at the periphery of particle raft is given. The particle raft is viewed as an elastic circular plate under the action of the radial pressure, which originates from the surface tension difference, which has been verified by the experimental result. These explorations cast a new light on how to apply loads to measure mechanical properties of soft matter, which also provide some inspirations on the design of microsensors and microfluidics.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Axisymmetric Compression of a Circular Particle Raft Driven by the Diffusion of Surfactant

Yao,

Cao,

Liu

et al. 2024

Langmuir

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show abstract

“…At first, the surface tension decreased greatly with continuous addition of SDS molecules until the concentration of SDS was about 3.74 mM, at which the surface tension had a minimum. The impurity in SDS powder might be responsible for the existence of such a minimum 30 . Then the surface tension increased slowly and kept nearly unchanged until the SDS concentration approached to 1 CMC.…”

Section: Resultsmentioning

confidence: 99%

Wetting and evaporation behavior of dilute sodium dodecyl sulfate droplets on soft substrates under a direct current electric field

Jiang,

Xu,

et al. 2024

Sci Rep

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Wetting and evaporation behavior of dilute sodium dodecyl sulfate (SDS) droplets on planar polydimethylsiloxane (PDMS) surfaces under a direct current (DC) electric field were experimentally investigated. Two characteristic voltages—actuation voltage and saturation voltage were observed in the electrowetting of dilute SDS droplets on PDMS surfaces. It was found that for dilute SDS droplets with a fixed SDS concentration substrate elasticity has an obvious influence on actuation voltage, and saturation voltage increased with the increase of mass ratio of PDMS surfaces. SDS concentration was also found to obviously influence actuation voltage and saturation voltage when SDS concentration was in a certain range. For the case of evaporation of sessile dilute SDS droplets on PDMS surfaces with the application of a DC electric field, substrate elasticity, SDS concentration and the magnitude of applied voltage were all found to have an influence on the duration of CCR stage. Moreover, contact angle hysteresis for dilute SDS droplets on a planar PDMS 10:1 surface under different applied voltage was measured and it was found that the magnitude of applied voltage greatly influenced contact angle hysteresis, which also depends on SDS concentration and KCl concentration.

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Wettability and evaporation of sodium dodecyl sulfate aqueous droplets on microhole-patterned polydimethylsiloxane surfaces under a direct current electric field

Xu,

Jiang,

Huang

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Wetting of aqueous sodium dodecyl sulfate droplets on polydimethylsiloxane surfaces during evaporation

Cited by 3 publications

References 55 publications

Axisymmetric Compression of a Circular Particle Raft Driven by the Diffusion of Surfactant

Axisymmetric Compression of a Circular Particle Raft Driven by the Diffusion of Surfactant

Wetting and evaporation behavior of dilute sodium dodecyl sulfate droplets on soft substrates under a direct current electric field

Wettability and evaporation of sodium dodecyl sulfate aqueous droplets on microhole-patterned polydimethylsiloxane surfaces under a direct current electric field

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