Temperature-dependent soft wetting on amorphous, uncrosslinked polymer surfaces

Chaudhuri, Krishnaroop; Pham, Jonathan T.

doi:10.1039/d2sm00301e

Cited by 5 publications

(3 citation statements)

References 61 publications

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“…253 Moreover, particle indentation methods can also be connected to fluid separation and surface stress. The indentation process can also provide information for pure liquid surfaces like capillary forces, 254 detection of nanobubbles 255 or quantification of lubricant layer thicknesses 256 for SLIPS.…”

Section: Mechanical Characterizationmentioning

confidence: 99%

Wetting on silicone surfaces

Hauer,

Naga,

Badr

et al. 2024

Soft Matter

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Section: Mechanical Characterizationmentioning

confidence: 99%

Wetting on silicone surfaces

Hauer,

Naga,

Badr

et al. 2024

Soft Matter

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“…PDMS has been employed in numerous studies to investigate various phenomena influenced by soft wetting, such as droplet movement on stiffness-patterned substrates, spreading and stick-slip motion of the wetting ridge, ,,, droplet coalescence, and fluid separation on the tip of the ridge formed on a swollen soft substrate . Other soft materials such as gelatin, poly(vinyl siloxane), and hydrophobic soft gel of poly(styrene-butadiene-styrene) (SBS) in paraffin, in which the softness was tuned by the mass of SBS in paraffin, and polymer melts were also utilized for soft wetting studies. Besides surfaces with uniform softness, static softness patterns on surfaces have been shown with different systems by variation during substrate preparation.…”

Section: Introductionmentioning

confidence: 99%

Controllable Wetting Transitions on Photoswitchable Physical Gels

Nekoonam

Vera

Goralczyk

et al. 2023

ACS Appl. Mater. Interfaces

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Softness plays a key role in the deformation of soft elastic substrates at the three-phase contact line, and the acting forces lead to the formation of a wetting ridge due to elastocapillarity. The change in wetting ridge and surface profiles at different softness has a great impact on the droplet behavior in different phenomena. Commonly used materials to study soft wetting are swollen polymeric gels or polymer brushes. These materials offer no possibility to change the softness on demand. Therefore, adjustable surfaces with tunable softness are highly sought-after to achieve on-demand transition between wetting states on soft surfaces. Here, we present a photorheological physical soft gel with adjustable stiffness based on the spiropyran photoswitch that shows the formation of wetting ridges upon droplet deposition. The presented photoswitchable gels allow the creation of reversibly switchable softness patterns with microscale resolution using UV light-switching of the spiropyran molecule. Gels with varying softness are analyzed, showing a decrease in the wetting ridge height at higher gel stiffness. Furthermore, wetting ridges before and after photoswitching are visualized using confocal microscopy, showing the transition in the wetting properties from soft wetting to liquid/liquid wetting.

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“…The development and interest in elasto-capillary phenomena have increased in recent years. Thanks to advances in imaging techniques, our understanding of elasto-capillary effects in, for instance, soft bulk matter has matured. − Recently, it has also found applications in coating of polymers, adhesives, and bioinspired designs, − micro- and nanofabrication, , bending of fibers, or nanowire arrays . It has further been shown to be beneficial for capillary origami, i.e., wrapping thin solids around droplets , or bubbles. , …”

Section: Introductionmentioning

confidence: 99%

Nanoscale Elasto-Capillarity in the Graphene–Water System under Tension: Revisiting the Assumption of a Constant Wetting Angle

Kateb,

Isacsson

2023

Langmuir

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Wetting highly compliant surfaces can cause them to deform. Atomically thin materials, such as graphene, can have exceptionally small bending rigidities, leading to elasto-capillary lengths of a few nanometers. Using large-scale molecular dynamics (MD), we have studied the wetting and deformation of graphene due to nanometer-sized water droplets, focusing on the wetting angle near the vesicle transition. Recent continuum theories for wetting of flexible membranes reproduce our MD results qualitatively well. However, we find that when the curvature is large at the triple-phase contact line, the wetting angle increases with decreasing tension. This is in contrast to existing macroscopic theories but can be amended by allowing for a variable wetting angle.

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Temperature-dependent soft wetting on amorphous, uncrosslinked polymer surfaces

Abstract: The wetting of polymer melts at high temperatures is studied by placing a glycerol drop on a poly(n-butyl methacrylate) film and measuring the wetting ridge. The height of the wetting...

Cited by 5 publications

References 61 publications

Wetting on silicone surfaces

Wetting on silicone surfaces

Controllable Wetting Transitions on Photoswitchable Physical Gels

Nanoscale Elasto-Capillarity in the Graphene–Water System under Tension: Revisiting the Assumption of a Constant Wetting Angle

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